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Digitale Medien

High spin states in102Ag (1995)

Ravi Kumar, V. ; Thirumala Rao, B. V. ; Lakshminarayana, V. ; [weitere]

Springer

The European physical journal 351 (1995), S. 249-258

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 23.20.En ; 27.60.+j

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract High spin states are populated in102Ag using the reaction16O+89Y with projectile energies in the energy range 60–80 MeV. Gamma multipolarities are inferred from DCO ratios and coincidence relationships are established among the gamma rays assigned to102Ag. A comprehensive level scheme is constructed with four band systems, two of positive parity and the other two of negative parity. The present study extended spins upto 19− in the main negative parity band. A new band is populated in the present work and is similar to the one observed in106Ag.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01290906

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Shell model yrast states in the many-particle nucleus 72 157 Hf85 (1995)

Saad, A. F. ; Zhang, C. T. ; Collatz, R. ; [weitere]

Springer

The European physical journal 351 (1995), S. 247-248

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 21.60.Cs ; 27.70.+q

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract In-beamγγ- andγγn-measurements have for the first time identified excited states in the 72 157 Hf85 nucleus and have established its yrast levels up to 6.5 MeV and I=(51/2). The results of parameter-free 11-particle recoupling calculations in the framework of the shell model for the configurationsπh 11 2/8 νf 7 2/3 andπh 11 2/8 νf 7 2/2 h9/2 are in excellent agreement with the observed levels up to 39/2 at 4.758 MeV. A weakly populated 52 ns 29/2+ yrast isomer at 2.876 MeV is assigned as the three-neutron configurationνf7/2h9/2i13/2.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01290905

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3

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First evidence for the 2+ level in the very neutron-rich nucleus102Sr (1995)

Lhersonneau, G. ; Pfeiffer, B. ; Huhta, M. ; [weitere]

Springer

The European physical journal 351 (1995), S. 357-358

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ISSN: 1434-601X

Schlagwort(e): 27.60.+j ; 23.20.Lv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Evidence for the 2+ level in102Sr is obtained from theβ-decay of102Rb, mass separated at the ISOLDE facility. The energy of 126 keV and the collectivity of the 2+→0+ transition indicate that102Sr is a strongly deformed rigid rotor. In addition, a sizeable lifetime is measured for the 94 keV transition in102Y.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01291137

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4

Digitale Medien

127Ce levels populated in the 4.2 s127Pr beta-decay (1995)

Gizon, A. ; Genevey, J. ; Barnéoud, D. ; [weitere]

Springer

The European physical journal 351 (1995), S. 361-362

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 27.60.+j

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract From new measurements, a half-live of 4.2±0.3 s has been clearly established in127Pr. This value confirms our first result [4] and rules out other data [5]. The127Pr activity was produced by bombarding92Mo or94Mo targets with 210 MeV40Ca beams. The mass identification has been made using an ion-guide coupled with an on-line isotope separator. The partial level scheme proposed for127Ce has been deduced from β-gated γ spectra and Xγ- and γγ-coincidences. A new band structure based on a 1/2+ state is established.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01291139

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5

Digitale Medien

The observation of a superdeformed structure in82Y (1995)

Dagnall, P. J. ; Smith, A. G. ; Lisle, J. C. ; [weitere]

Springer

The European physical journal 353 (1995), S. 251-253

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ISSN: 1434-601X

Schlagwort(e): 21.10.Re ; 21.60.Cs ; 23.20.Lv ; 27.50.+e

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The58Ni(30Si,αpn)82Y reaction at a beam energy of 134 MeV was used to populate the odd-odd nucleus82Y and coincidentγ rays depopulating high spin states in the evaporation residues were detected with the EUROGAM Phase 2 array. A superdeformed structure has been observed with an intensity of 1.5±0.5%. The cascade of 9 coincidentγ rays has consecutive energy spacing of ∼160 keV. This corresponds to a dynamic moment of inertia which is almost constant at approx mately 25h 2 MeV−1. The band is interpreted as a signature=0, negative parity SD band with aπ51 V52 intrinsic intruder configuration.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01292329

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6

Digitale Medien

High-spin states in109Sn and their decay to the ground state (1995)

Käubler, L. ; Prade, H. ; Reif, J. ; [weitere]

Springer

The European physical journal 351 (1995), S. 123-124

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 27.60.+j ; 21.60.Cs

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract An extended level scheme of109Sn is presented showing high-spin states up to Ex≈ 8 MeV and spins up toJπ=(41/2+). Their decay to the 5/2+ ground state has been observed identifying a 12.8 keV 7/2+ → 5/2+ transition. A half-life of T1/2=7(1) ns has been measured for the 17/2+ state atE x =2114 keV. The experimental data are compared with the predictions of shell-model calculations.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01289517

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7

Digitale Medien

Location of the181Os isomeric state (1995)

Reussière, B. ; Ibrahim, F. ; Kilcher, P. ; [weitere]

Springer

The European physical journal 351 (1995), S. 127-128

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ISSN: 1434-601X

Schlagwort(e): 21.10.-k ; 21.10.Pc ; 21.10.Re ; 23.20.Lv ; 23.40.−s ; 27.70.+q ; 29.25.Rm ; 29.30.Kv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The decay of181Ir has been studied on-line with mass-separated sources from the ISOCELE facility. The level scheme of181 Os has been established. The isomeric state has been located at 48.9 keV above the ground state. Thus the isomeric and ground states are identified as the 7/2−(T1/2 =2.7 m) and 1/2−(T1/2=105 m) levels respectively.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01289519

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8

Digitale Medien

First identification of high spin states in160Lu (1995)

Sun, H. ; Ma, Y. ; Zheng, H. ; [weitere]

Springer

The European physical journal 351 (1995), S. 241-242

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 25.70.Gh ; 27.70.+q

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A rotational band of160Lu was identified for the first time through the144Sm(19F,3n)160Lu reaction with a beam energy of 90 MeV. A γ-γ-BGO coincidence experiment was performed using five HpGe-BGO Compton-Suppressed spectrometers and a 14 elements ball of BGO detectors. The highest spin of the band with π9/2−[514]⊗v1/2+[660] could be pushed up to 21−, and it shows the feature of an anomalous signature splitting.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01290902

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9

Digitale Medien

Observation of high spin states in117Xe (1995)

Liu, Z. ; Sun, X. ; Zhou, X. ; [weitere]

Springer

The European physical journal 351 (1995), S. 363-364

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ISSN: 1434-601X

Schlagwort(e): 21.10.Re ; 23.20.Lv ; 27.60.+j

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract High spin states of117Xe have been investigated by means of in-beam γ-ray spectroscopy using the reaction92Mo(28Si, 2pn) at beam energies of 100 to 120 MeV. The previously known νh11/2 bands are confirmed and the νg7/2 favored-signature band is extended up to 47/2+, in which two band crossings are observed at ħω=0.33 and 0.44 MeV, respectively. Two new positive-parity bands have been established, one of which is most likely the νg7/2 unfavored-signature band. A new transition cascade with irregular level spacings is also observed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01291140

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10

Digitale Medien

Study of the yrast band in the doubly odd156Tm (1995)

Sun, H. ; Ma, Y. ; Zhang, J. ; [weitere]

Springer

The European physical journal 352 (1995), S. 115-116

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 27.70.+q

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The yrast band in the doubly odd156Tm nucleus was studied through144Sm(19F,2p5n)156Tm reaction at beam energy of 105MeV. Several high-spin states of156Tm were identified and the highest spin of the band with configurationπ7/2−[523] ⊗v1/2+[660] could be built up to spin 25ħ. The level structure shows the onset of a non- or weak collectivity which generally appears at neutron number of 87 in neutron-deficient rare-earth nuclei.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01298894

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11

Digitale Medien

Yrast states in the doubly-odd nucleus100Tc (1995)

Bizzeti-Sona, A. M. ; Blasi, P. ; Stefanini, A. A. ; [weitere]

Springer

The European physical journal 352 (1995), S. 247-255

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ISSN: 1434-601X

Schlagwort(e): 21.10.Hw ; 27.60.+j ; 23.20.Lv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract High spin states up toJ=14 and excitation energy up toE *=3076 keV have been observed in the odd-odd nucleus100Tc with the reaction96Zr(7Li, 3n), at bombarding energies between 21 and 31 MeV, by in-beam γ spectroscopy and conversion-electron measurements. A ΔJ=1 negative parity band similar to that observed in theN=57 isotone102Rh, and based on the 8−, 708 keV state has been identified. The observed band can be interpreted in terms of collective core excitations based on a two-quasiparticle state of(πg9/2 ⊗ νh11/2) configuration. Comparison with IBFM-2 calculations have been performed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01289497

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12

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Structure of the highly deformed nucleus101Sr63 and evidence for identical K=3/2 bands (1995)

Lhersonneau, G. ; Gabelmann, H. ; Pfeiffer, B. ; [weitere]

Springer

The European physical journal 352 (1995), S. 293-301

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ISSN: 1434-601X

Schlagwort(e): 27.60.+j ; 23.20.Lv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The low-energy level scheme of theN=63 nucleus101Sr has been obtained from a β-decay study of101Rb. The ν[532]5/2 and ν[411]3/2 orbitals are well established as the ground state and a band head at 271.2keV, respectively. The general properties of the level scheme indicate a quadrupole deformation ofβ ≃ 0.4, confirming the unique feature of saturation of deformation inN ≥ 60 Sr isotopes. The energies of theK=3/2 intraband transitions in the odd-neutron neighbours99Sr61 and101Sr63 are very similar. More generally, the identical bands at low spin in98–101Sr nuclei are correlated with the mass-independent moments of inertia in this region.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01289502

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13

Digitale Medien

Lifetime of the two-phonon vibrational state in232Th (1995)

Korten, W. ; Bröcking, P. ; Hübel, H. ; [weitere]

Springer

The European physical journal 351 (1995), S. 143-147

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ISSN: 1434-601X

Schlagwort(e): 21.10.Re ; 21.60.Ev ; 23.20.Lv ; 27.90. + b

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We report on a measurement of the lifetime of the 1414 keV state in232Th by the Doppler-shift recoil-distance method. This 4+ state shows all characteristics of a nearly-harmonic two-phononγ-vibrational excitation. The result for the B(E2) value obtained from the lifetime,τ=3.2 ± 0.7 ps, is in agreement with an earlier estimate of the collectivity from Coulomb-excitation yields and supports the interpretation of the 1414 keV state as a two-phononγ-vibrational excitation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01289524

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14

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Confirmation of the superdeformed band in192Pb (1995)

Asztalos, S. J. ; Fallon, P. ; Clark, R. M. ; [weitere]

Springer

The European physical journal 352 (1995), S. 239-240

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ISSN: 1434-601X

Schlagwort(e): 21.10.Re ; 23.20.Lv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract High-spin states in192Pb were populated via the reaction173Yb(24Mg,5n) at a beam energy of 140 MeV, and the resultingγ-rays were deteced using GAMMASPHERE. A previously observed superdeformed band in192Pb has been confirmed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01289493

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15

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High spin levels in119Te (1995)

Papadopoulos, C. T. ; Vlastou, R. ; Serris, M. ; [weitere]

Springer

The European physical journal 352 (1995), S. 243-244

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 27.60.+j

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract High spin levels in119Te have been populated following the96Zr (30Si, α 3n)119Te reaction at a beam energy of 135 MeV. The subsequentγ-ray deexcitation was studied usingγ-ray spectroscopic methods. New levels and several spin and parity assignments up toJ π=55/2− were established. The decay scheme at high-spin exhibits single-particle characteristics associated with the fully aligned ν(h11/2)3 π(g7/2)2 configuration for the 39/2− level, while the 55/2− level could be interpreted as fully aligned π(d5/2)2 ν h 11 2/5 g 7 2/−2 ) configuration.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01289495

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16

Digitale Medien

High-spin states of odd-odd156Ho (1995)

Bhatti, S. H. ; Kim, J. C. ; Chae, S. J. ; [weitere]

Springer

The European physical journal 353 (1995), S. 119-120

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 27.70.+q

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract High spin states in the nucleus156Ho have been studied via the fusion-evaporation reaction140Ce(19F,3nγ)156Ho at the beam energy of 82 MeV.γ-γ coincidences, Eγ, Iγ and excitation functions have been measured. With two rotationally-aligned bands identified as π[h11/2]ν [i13/2], we found two new bands with a signature splitting, whose structure is believed to arise from either ν[h9/2] or ν[f7/2] coupled to π[h11/2]. Our placement of γ rays belonging to these new bands suggests that the previously known level scheme should be corrected. We also found many new low-energy γ rays in the low excitation energy. As compared to154Ho, the present nucleus with two more neutrons becomes more collective, and shows well-observed rotationally-aligned bands with a clear signature splitting.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01295887

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17

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Braided Hopf algebras and differential calculus (1995)

Schlieker, Michael ; Zumino, Bruno

Springer

Letters in mathematical physics 33 (1995), S. 33-38

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ISSN: 1573-0530

Schlagwort(e): 17B37 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract We show that the algebra of the bicovariant differential calculus on a quantum group can be understood as a projection of the cross-product between a braided Hopf algebra and the quantum double of the quantum group. The resulting super-Hopf algebra can be reproduced by extending the exterior derivative to tensor products.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00750809

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18

Digitale Medien

Lie groups whose coadjoint orbits are of dimension smaller or equal to two (1995)

Arnal, D. ; Cahen, M. ; Ludwig, J.

Springer

Letters in mathematical physics 33 (1995), S. 183-186

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ISSN: 1573-0530

Schlagwort(e): 16W30 ; 17Bxx ; 17B05 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract We give a complete classification of the class of connected, simply connected Lie groups whose coadjoint orbits are of dimension smaller or equal to two.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00739806

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19

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Integration over the group space of SUq(2), Clebsch-Gordan coefficients, and related identities (1995)

Cadavid, A. C. ; Finkelstein, R. J.

Springer

Letters in mathematical physics 33 (1995), S. 221-229

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ISSN: 1573-0530

Schlagwort(e): 81R50 ; 17B37

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract We calculate the Clebsch-Gordan coefficients of SUq(2) by a Woronowicz integration over the group manifold and obtain a representation differing from that reached by working with theq-group algebra. These apparently different results must agree, however, and their equivalence implies aq-identity. On lettingq = 1, we shall obtain two results of different structures for the Clebsch-Gordan coefficients of SU(2) and their equivalence similarly implies an identity among the usual binomial coefficients. With the same approach, one may extend the Woronowicz integral of the product of two irreducible representations to products of many irreducible representations.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00749623

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20

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Fock spaces with generalized statistics (1995)

Liguori, A. ; Mintchev, M.

Springer

Letters in mathematical physics 33 (1995), S. 283-295

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ISSN: 1573-0530

Schlagwort(e): 81T05 ; 81R50 ; 81S05

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract Fock representations for quantum fields which obey generalized statistics are explicitly constructed. The main features of these representations are investigated.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00749682

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21

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Cohomology and deformation of Leibniz pairs (1995)

Flato, M. ; Gerstenhaber, M. ; Voronov, A. A

Springer

Letters in mathematical physics 34 (1995), S. 77-90

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ISSN: 1573-0530

Schlagwort(e): 16E40 ; 16W30 ; 17B37 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract Cohomology and deformation theories are developed for Poisson algebras starting with the more general concept of a Leibniz pair, namely of an associative algebraA together with a Lie algebraL mapped into the derivations ofA. A bicomplex (with both Hochschild and Chevalley-Eilenberg cohomologies) is essential.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00739377

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22

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BRST structures and symplectic geometry on a class of supermanifolds (1995)

Albeverio, Sergio ; Fei, Shao Ming

Springer

Letters in mathematical physics 33 (1995), S. 207-219

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ISSN: 1573-0530

Schlagwort(e): 81R50 ; 17B37 ; 58A50 ; 81Q60

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract By investigating the symplectic geometry and geometric quantization of a class of supermanifolds, we exhibit BRST structures for a certain kind of algebras. We discuss the undeformed andq-deformed cases in the classical as well as in the quantum cases.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00749622

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23

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A star-product approach to noncompact quantum groups (1995)

Bidegain, Frédéric ; Pinczon, Georges

Springer

Letters in mathematical physics 33 (1995), S. 231-240

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ISSN: 1573-0530

Schlagwort(e): AMS classification 17B37 ; 16W30 ; 22D05 ; 46H99 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract Using the duality and the topological theory of well-behaved Hopf algebras, we construct star-product models of noncompact quantum groups from Drinfeld and Reshetikhin standard deformations of enveloping Hopf algebras of simple Lie algebras. Our star-products act not only on coefficient functions of finite-dimensional representations, but actually on allC ∞ functions, and they even exist for nonlinear (semi-simple) Lie groups.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00749624

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24

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Projective quantum spaces (1995)

Meyer, U.

Springer

Letters in mathematical physics 35 (1995), S. 91-97

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ISSN: 1573-0530

Schlagwort(e): 81R50 ; 14M15 ; 14M17

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract Associated to the standard SU q (n) R-matrices, we introduce quantum spheresS q 2n-1 , projective quantum spaces ℂℙ q n-1 , and quantum Grassmann manifoldsG k(ℂ q n ). These algebras are shown to be homogeneous spaces of standard quantum groups and are also quantum principle bundles in the sense of T. Brzeziński and S. Majid.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00750759

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25

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Noncommutative symmetric functions and laplace operators for classical Lie algebras (1995)

Molev, Alexander

Springer

Letters in mathematical physics 35 (1995), S. 135-143

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ISSN: 1573-0530

Schlagwort(e): 17B35 ; 17B37 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract New systems of Laplace (Casimir) operators for the orthogonal and symplectic Lie algebras are constructed. The operators are expressed in terms of paths in graphs related to matrices formed by the generators of these Lie algebras with the use of some properties of the noncommutative symmetric functions associated with a matrix. The decomposition of the Sklyanin determinant into a product of quasi-determinants play the main role in the construction. Analogous decomposition for the quantum determinant provides an alternative proof of the known construction for the Lie algebra gl(N).

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URL: http://dx.doi.org/10.1007/BF00750763

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26

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Bicovariant differential geometry of the quantum group SL h (2) (1995)

Karimipour, V.

Springer

Letters in mathematical physics 35 (1995), S. 303-311

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ISSN: 1573-0530

Schlagwort(e): 81R50 ; 16W30 ; 58B30

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract There are only two quantum group structures on the space of two by two unimodular matrices, these are the SL q (2) and the SL h (2) quantum groups. The differential geometry of SL q (2) is well known. In this Letter, we develop the differential geometry of SL h (2), and show that the space of left invariant vector fields is three-dimensional.

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URL: http://dx.doi.org/10.1007/BF00750837

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27

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Quantum algebras for maximal motion groups ofN-dimensional flat spaces (1995)

Ballesteros, A. ; Herranz, F. J. ; Olmo, M. A. ; [weitere]

Springer

Letters in mathematical physics 33 (1995), S. 273-281

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ISSN: 1573-0530

Schlagwort(e): 17B37 ; 81R50 ; 16W30

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract An embedding method to getq-deformations for the nonsemisimple algebras generating the motion groups ofN-dimensional flat spaces is presented. This method gives a global and simultaneous scheme ofq-deformation for all iso(p, q) algebras and for those obtained from them by some Inönü-Wigner contractions, such as theN-dimensional Euclidean, Poincaré, and Galilei algebras.

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URL: http://dx.doi.org/10.1007/BF00749681

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28

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GL q (N)-covariant braided differential bialgebras (1995)

Isaev, A. P. ; Vladimirov, A. A.

Springer

Letters in mathematical physics 33 (1995), S. 297-302

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ISSN: 1573-0530

Schlagwort(e): 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract We study the possibility of defining the (braided) comultiplication for the GL q (N)-covariant differential complexes on some quantum spaces. We discover suchdifferential bialgebras (and Hopf algebras) on the bosonic and fermionic quantum hyperplanes (with additive coproduct) and on the braided matrix algebra BM q (N) with both multiplicative and additive coproducts. The latter case is related (forN = 2) to theq-Minkowski space andq-Poincaré algebra.

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URL: http://dx.doi.org/10.1007/BF00749683

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29

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A quantum dual pair $$\mathfrak{s}\mathfrak{l}_2 ,\mathfrak{o}_n $$ and the associated Capelli identity (1995)

Noumi, Masatoshi ; Umeda, Tôru ; Wakayama, Masato

Springer

Letters in mathematical physics 34 (1995), S. 1-8

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ISSN: 1573-0530

Schlagwort(e): 17B37 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract A quantum analogue of the dual pair $$\mathfrak{s}\mathfrak{l}_2 ,\mathfrak{o}_n $$ is introduced in terms of the oscillator representation of U q $$(\mathfrak{s}\mathfrak{l}_2 )$$ . Its commutant and the associated identity of Capelli type are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00739369

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30

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Deformations of multiparameter quantum gl(N) (1995)

Frønsdal, C. ; Galindo, A.

Springer

Letters in mathematical physics 34 (1995), S. 25-36

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ISSN: 1573-0530

Schlagwort(e): 81R50 ; 70G50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract Multiparameter quantum gl(N) is not a rigid structure. This Letter defines an essential deformation as one that cannot be interpreted in terms of a similarity transformation, nor as a perturbation of the parameters. All the equivalence classes of first-order essential deformations are found, as well as a class of exact deformations. This work provides quantization of all the classical Lie bialgebra structures (constantr-matrices) found by Belavin and Drinfeld for sl(n). A special case, that requires the Hecke parameter to be a cubic root of unity, stands out.

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URL: http://dx.doi.org/10.1007/BF00739372

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31

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On the schwarz problem for the $$\widehat{{\text{su}}}_{\text{2}} $$ Knizhnik-Zamolodchikov equation (1995)

Stanev, Yassen S. ; Todorov, Ivan T.

Springer

Letters in mathematical physics 35 (1995), S. 123-134

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ISSN: 1573-0530

Schlagwort(e): 81T40 ; 81R10 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract We study the monodromy representationsℬ k,Iof the mapping class groupℬ 4 acting on 4-point blocks satisfying the Knizhnik-Zamolodchikov equation for the levelk su2 current algebra. We classify all irreducibleℬ k,Iwhich are realized by finite groups; we also display finite irreducible components for the reducible representations corresponding tok = 10.

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URL: http://dx.doi.org/10.1007/BF00750762

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32

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Coherent states of theq-Weyl algebra (1995)

Spiridonov, Vyacheslav

Springer

Letters in mathematical physics 35 (1995), S. 179-185

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ISSN: 1573-0530

Schlagwort(e): 17B37 ; 33D80 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract New coherent states of theq-Weyl algebraAA † −qA † A = 1,0 〈q 〈 1, are constructed. They are defined as eigenstates of the operatorA † which is the lowering operator for nonhighest weight representations describing positive energy states. Depending on whether the positive spectrum is discrete or continuous, these coherent states are related either to the bilateral basic hypergeometric series or to some integrals over them. The free particle realization of theq-Weyl algebra whenA † A ∞ d2/dx2 is used for illustrations.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00750767

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33

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q-transformation theory (1995)

Finkelstein, R. J. ; Marcus, E.

Springer

Letters in mathematical physics 35 (1995), S. 221-227

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ISSN: 1573-0530

Schlagwort(e): 81R50 ; 81S05 ; 81P99

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract We obtain the complete set of states of theq-oscillator in both configuration space and momentum space as well as the transformation between these spaces. The states as well as the matrix elements lie in the SU q (2) algebra. To obtain transition probabilities, one must take the ‘Woronowicz square.’

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00761294

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34

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The quantum super-Yangian and Casimir operators of Uq(gl(M |N)) (1995)

Zhang, R. B.

Springer

Letters in mathematical physics 33 (1995), S. 263-272

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ISSN: 1573-0530

Schlagwort(e): 17B37 ; 81R50 ; 17A70

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract TheZ 2 graded Yangian Yq(gl(M |N)) associated with the Perk-SchultzR matrix is introduced. Its structural properties, the central algebra in particular, are studied. AZ 2-graded associative algebra epimorphism Yq(gl(M |N)) → Uq (gl(M |N)) is obtained in explicit form. Images of central elements of the quantum super-Yangian under this epimorphism yield the Casimir operators of the quantum supergroup Uq(gl(M |N)) constructed in an earlier publication.

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URL: http://dx.doi.org/10.1007/BF00749628

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35

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The two-dimensional Euclidean quantum algebra at roots of unity (1995)

Ciccoli, N. ; Giachetti, R.

Springer

Letters in mathematical physics 34 (1995), S. 37-48

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ISSN: 1573-0530

Schlagwort(e): 16S32 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract The two-dimensional Euclidean quantum algebra is considered at roots of unity. The algebraic properties and the Poisson-Hopf structure are first investigated. We then determine the irreducible representations and study the reduction of the tensor product of two of them.

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URL: http://dx.doi.org/10.1007/BF00739373

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36

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Transformation theory ofq-quantum mechanics (1995)

Finkelstein, Robert J.

Springer

Letters in mathematical physics 34 (1995), S. 275-283

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ISSN: 1573-0530

Schlagwort(e): 81P99 ; 81R50 ; 81S05

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract Although there is no empirical motivation for replacing the commutators of dynamically conjugate operators in quantum mechanics byq-commutators, it appears possible to construct a consistent mathematical formulism based on this idea. To examine such a possibility further, we have studied the relation of this proposal to the Schwinger action principle, since the entire quantum mechanical formulism may be inferred from this principle. In particular, we have discussed the quantum transformation theory within this framework.

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URL: http://dx.doi.org/10.1007/BF01872781

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37

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Interrelations between quantum groups and reflection equation (braided) algebras (1995)

Isaev, A. P.

Springer

Letters in mathematical physics 34 (1995), S. 333-341

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ISSN: 1573-0530

Schlagwort(e): 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract We show that the differential complex Ω B over the braided matrix algebra BM q (N) represents a covariant comodule with respect to the coaction of the Hopf algebra Ω A which is a differential extension of GL q (N). On the other hand, the algebra Ω A is a covariant braided comodule with respect to the coaction of the braided Hopf algebra Ω B . Geometrical aspects of these results are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00750065

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38

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Unitary group representations in fock spaces with generalized exchange properties (1995)

Liguori, A. ; Mintchev, M. ; Rossi, M.

Springer

Letters in mathematical physics 35 (1995), S. 163-177

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ISSN: 1573-0530

Schlagwort(e): 81T05 ; 81R05 ; 81R50

Quelle: Springer Online Journal Archives 1860-2000

Thema: Mathematik , Physik

Notizen: Abstract We investigate the notion of secondR-quantization - a suitable deformation of the standard second quantization which properly takes into account the nontrivial exchange properties characterizing generalized statistics. We also perform theR-quantization of a class of unitary one-particle representations relevant for the description of symmetries. The Euclidean covariance of anyons is analyzed within this context.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00750766

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39

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Confirmation of the existence of a superdeformed rotational band in192Pb (1995)

Ducroux, L. ; Astier, A. ; Béraud, R. ; [weitere]

Springer

The European physical journal 352 (1995), S. 13-14

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ISSN: 1434-601X

Schlagwort(e): 21.10.Re ; 23.20.Lv ; 27.80.+w

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A controversy has arisen over the existence, or not, of a superdeformed rotational band in192Pb. We have carried out an experiment using the168Er(3OSi, 6n)192Pb reaction at 159 MeV and have observed the coincidentγ rays in the EUROGAM 2 spectrometer. We confirm the original result of Henry et al. that a superdeformed band exists in192Pb.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01292756

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40

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Yrast excitations in129Te (1995)

Zhang, C. T. ; Sferrazza, M. ; Mayer, R. H. ; [weitere]

Springer

The European physical journal 353 (1995), S. 11-12

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ISSN: 1434-601X

Schlagwort(e): 25.70.Hi ; 23.20.Lv ; 27.60.+j

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Gamma-ray studies of130Te+275 MeV64Ni reaction products have identified yrast states of129Te up to a 33 ns isomer at 2138 keV. Theβ −-decay of 17.7 min129Sb to levels in129Te is elucidated.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01297719

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41

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Collective bands in the184Hg nucleus (1995)

Sferrazza, M. ; Brandolini, F. ; Medina, N. H. ; [weitere]

Springer

The European physical journal 353 (1995), S. 5-6

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 27.60.+j ; Z

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The structure of the neutron deficient 184 Hg nucleus was investigated using the GASP γ-ray spectrometer.184 Hg nucleus was populated through the156 Gd(32 S,4n) reaction at a beam energy of 163 MeV. Six bands were observed, four of them for the first time. The quadrupole deformations of the two stronger excited bands were measured using the Doppler shift attenuation method.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01297716

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42

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K-isomeric state in even-even100Sr (1995)

Pfeiffer, B. ; Lhersonneau, G. ; Gabelmann, H. ; [weitere]

Springer

The European physical journal 353 (1995), S. 1-2

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ISSN: 1434-601X

Schlagwort(e): 27.60+j ; 23.20.Lv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A t1/2=85 ns isomer has been identified at 1619 keV in100Sr. The halflife is attributed to a ΔK=4 hindered decay. The configuration is proposed to be built on the [411]3/2 and the [532]5/2 neutron quasiparticle orbitals.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01297714

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43

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Identification of beta-decay of150La (1995)

Okano, K. ; Taniguchi, A. ; Yamada, S. ; [weitere]

Springer

The European physical journal 351 (1995), S. 243-244

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ISSN: 1434-601X

Schlagwort(e): 23.40.-s ; 21.10.Hw ; 23.20.Lv

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The β-decay of150La, the heaviest isotope of lanthanum, has been identified by observing γ-rays from mass separated activities obtained at KUR-ISOL. From the decay curves of 97.0 and 208.7 keV γ-rays in150Ce and of Ce-Kα X-ray, the half-life of150La has been determined as 0.51(3) s. This value is in agreement with theoretical predictions from microscopic theory.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01290903

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44

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Proton-neutron interaction at N≅Z — First observation of the Tz=1 nucleus 46 94 Pd48 in-beam (1995)

Gorska, M. ; Grawe, H. ; Foltescu, D. ; [weitere]

Springer

The European physical journal 353 (1995), S. 233-234

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ISSN: 1434-601X

Schlagwort(e): 21.60.Cs ; 23.20.Lv ; 27.60.+j

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The neutron deficient nucleus94Pd was identified and studied for the first time by in-beam spectroscopy. An Iπ=(14+) isomer with t1/2=0.8 (2) μs was observed in a recoil catcher setup inside the multi-detector γ-array OSIRIS. Filter detectors for neutrons and charged particles were used to identify the (2p2n) exit channel of the reaction58Ni+40Ca, populated with only 0.06% of the total evaporation residue cross section. The structure of the isomer is discussed within the frame work of shell model calculations in the (p1/2,g9/2) model space with emphasis on the g 9 2/2 T=0, I=1,9 ”pairing” two-body matrix elements.

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URL: http://dx.doi.org/10.1007/BF01292324

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