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1

Digitale Medien

Shape coexistence near the double-midshell nucleus 111Rh (1998)

Lhersonneau, G. ; Pfeiffer, B. ; Alstad, J. ; [weitere]

Springer

The European physical journal 1 (1998), S. 285-297

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ISSN: 1434-601X

Schlagwort(e): PACS:27.60.+j 90 ≤ A ≤ 149 – 21.10.Tg Lifetimes – 23.20.Lv Gamma transitions and level energies

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract: The decay of 111Ru obtained from fast on-line chemical and mass separation has been investigated by β-γ-t and γ-γ coincidence techniques. Earlier spin and parity assignments of 111Rh levels based on extrapolations of level systematics are confirmed. In particular, the K=1/2 intruder band is supported by the hindrance of E2 transitions between deformed and spherical states and enhancement of intraband E2 transitions. The excitation energies of intruder band members in Rh isotopes show a minimum at 109Rh64, with two neutrons less than 111Rh at the N=66 midshell. This trend, which differs from the one in the higher-Z neighbouring elements Ag and Cd with minima at N=66, follows the evolution of deformation observed in the lower-Z elements Ru and Mo.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/s100500050063

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2

Digitale Medien

Beta Decay of 111Tc to 111Ru (1998)

Pfeiffer, B. ; Lhersonneau, G. ; Dendooven, P. ; [weitere]

Springer

The European physical journal 2 (1998), S. 17-19

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ISSN: 1434-601X

Schlagwort(e): PACS:27.60.+j 90 ≤ A ≤ 149 – 21.10.Tg Lifetimes – 23.20.Lv Gamma transitions and level energies

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract: The β-decay of the very neutron-rich 111Tc nucleus has been observed. A partial decay scheme of 111Ru is presented, complementing the high-spin levels earlier reported in spontaneous fission work.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/s100500050085

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3

Digitale Medien

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

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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5

Digitale Medien

Study of short-lived silver isotopes with a laser ion source (1995)

Fedoseyev, V. N. ; Jading, Y. ; Jonsson, O. C. ; [weitere]

Springer

The European physical journal 353 (1995), S. 9-10

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ISSN: 1434-601X

Schlagwort(e): 23.40.−s ; 29.25.Cy ; 32.80.RM

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A chemically selective laser ion source based on resonance ionization of atoms in a hot cavity has been applied for the study of short-lived silver isotopes at CERN/ ISOLDE. Silver atoms were ionized by two resonant excitations and final laser ionization into the continuum. Decay properties of the neutron-rich isotopes121–127Ag were studied with a neutron long-counter and aβ-detector.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01297718

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6

Digitale Medien

On the correspondence between rotational bands in the mass regionsA ≃ 100 andA ≃ 150 (1987)

Pfeiffer, B. ; Kratz, K. -L.

Springer

The European physical journal 327 (1987), S. 163-170

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 27.60 + j ; 27.70 + q

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A refined technique is presented to project rotational bands observed in the well studiedZ≧60 rare-earth region into the region of stable ground-state deformation atA ∼-100 with corresponding neutron numbers ofN ≧60. With this procedure, estimates of properties of so far unknown nuclei in the A∼-100 region can be obtained. As an illustration, isotopes aroundN=64 are discussed within this projection method and within the frame-work of the recent quartet model.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01292405

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7

Digitale Medien

Structure of theN=59 nucleus97Sr: coexistence of spherical and deformed states (1990)

Lhersonneau, G. ; Pfeiffer, B. ; Kratz, K. -L. ; [weitere]

Springer

The European physical journal 337 (1990), S. 149-159

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ISSN: 1434-601X

Schlagwort(e): 23.20.Lv ; 21.60.Ev ; 23.20.−g

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A band with a rotational pattern based on a state at 585.1 keV has been identified in theN=59 neutron-rich nucleus97Sr. Its properties lead to the [422] 3/2 Nilsson-orbital assignment for the band head. There is evidence for a second band with the head at 644.7 keV and the configuration [541] 3/2. Since the ground state and the lowest excited levels are spherical, shape coexistence is established for97Sr. A deformed nature of several levels at 500–600 keV results also from QRPA-model calculations. The structure of the low-lying spherical levels has been studied in the frame of the IBF model. The results of the present investigations lead to a better understanding of theN=59 isotones which constitute the link between the spherical and deformed nuclei atA∼100 as a species with shape coexistence but without any indications of particular softness.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01294286

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8

Digitale Medien

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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