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  • 1
    Electronic Resource
    Electronic Resource
    Nuclear orientation of183Re and184Re in iron (1972)
    Springer
    The European physical journal 254 (1972), S. 312-322 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The temperature dependence of the anisotropy of γ-rays from the decay of oriented183,184Re nuclei situated in an iron matrix was measured between 14 and 33 mK. Magnetic hyperfine splitting constants ofgH HF=5.04(9) × 10−18 erg andgH HF=3.21 (13) × 10−18 erg were determined for the groundstates of183Re and184Re, respectively. With the previously known hyperfinefield of −760(15) kG for Re in iron the followingg-factors were deduced:183Reg=1.32 (5) and184Reg=0.84 (5). The E2/M1 mixing ratio of the 793 keV 2+ −2+ transition in184W was accurately determined to δ (793 keV)=+16.65 (85).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01390261
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  • 2
    Electronic Resource
    Electronic Resource
    Measurements of magnetic moments of Tc isotopes and the hyperfine field of Tc in Fe and Ni (1995)
    Springer
    The European physical journal 350 (1995), S. 311-318 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ky ; 76.50.Jx ; 76.80.+ y
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report measurements of nuclear magnetic resonance on oriented nuclei (NMR-ON) on94Tc (Iπ=7+,T 1/2=4.9 h),95Tc (I π=9/2+,T 1/2=20 h) and96Tc (I π=7+,T 1/2=4.3 d) in Fe and on95Tc and96Tc in Ni. In order to elucidate the discrepancies on the hyperfine field of TcFe in the literature, the resonances were measured with high precision as a function of the external magnetic field Bext up to 2.0 T. In addition, TDPAC measurements were performed on99TcFe at T=300 K and 13 K. TheT=0 K hyperfine fields of Tc in Fe and Ni were determined to be −314(3) kG and −51.8(5) kG, respectively. The g-factors of93Tc,94Tc,95Tc,96Tc and99Tc(E=181 keV;I π=5/2+) are redetermined as g(93Tc)=1.405(14), g(94Tc)=0.731(7),g(95Tc)=1.321(13), g(96Tc)=0.727(7), g(99Tc)=1.390(17).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291188
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  • 3
    Electronic Resource
    Electronic Resource
    Intercalation reaction kinetics: a TDPAC study of 2H-TaS2 intercalation (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1971-1976 
    Details
    ISSN: 0392-6737
    Keywords: Chemical kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si riportano le osservazioniin situ dell'interazione quadrupolare nucleare di181Ta durante l'elettrointercalazione di 2H-TaS2 con ioni di gadolinio idratati per mezzo di correlazioni angolari differenziali perturbate nel tempo (TDPAC).
    Abstract: Резюме Мы сообщаем о наблюдении181Ta ядерного квадрупольного взаимодействия во время электровключения 2H-TaS2 с гидратированными ионами гадолиния с помощью временных дифференциальных возмущенных угловых корреляций.
    Notes: Summary We report on thein situ observation of the181Ta nuclear quadrupole interaction during electrointercalation of 2H-TaS2 with hydrated gadolinium ions by means of time differential perturbed angular correlations (TDPAC).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457896
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  • 4
    Electronic Resource
    Electronic Resource
    Electrointercalation into 2H-TaS2 single crystals:in situ dilatometry and superconducting properties (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 1706-1711 
    Details
    ISSN: 0392-6737
    Keywords: Superconducting materials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si è studiata l'elettrointercalazione dei seguenti ioni metallici idrati in cristalli 2H-TaS2: Na+, K+, Ca2+, Zn2+, Mn2+, La3+, Gd3+, Pr3+. Si trattano studi dilatometriciin situ della reazione e le proprietà superconduttrici di questi composti.
    Abstract: Резюме Иссиедуется злектропрослойка следуюших металлических ионов (Na+, K+, Ca2+, Zn2+, Mn2+, Co3+, Gd3+, Pr3) в монокристаллах 2H-TaS2. Приводятся резулътаты дилатометрических исследований и сверхироводящие свойства зтих соединений.
    Notes: Summary The electrointercalation of the following hydrated metal ions into 2H-TaS2 crystals was investigated: Na+, K+, Ca2+, Zn2+, Mn2+, Co2+, La3+, Gd3+, Pr3+. We report onin situ dilatometric studies of the reaction and on superconducting properties of these compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457854
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  • 5
    Electronic Resource
    Electronic Resource
    Nuclear orientation study of182Ta in 2H-TaS2 (1983)
    Springer
    Hyperfine interactions 16 (1983), S. 863-866 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Quadrupole-interaction nuclear orientation experiments have been performed on182Ta (jπ=3−1; T1/2=115d) in 2H-TaS2. γ-anisotropies up to ∼ 30 % have been observed at a temperature of ∼ 8 mK, which, however, is only about half of the value expected taking into account known results of TDPAC measurements on181Ta in 2H-TaS2. In principle, matrices of dichalcogenides could be well suited for nuclear quadrupole resonance on oriented nuclei (NQR-ON) experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02147383
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  • 6
    Electronic Resource
    Electronic Resource
    Nuclear quadrupole interaction in the low dimensional hf-trichalcogenides (1990)
    Springer
    Hyperfine interactions 60 (1990), S. 907-914 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on Time Differential Perturbed Angular Correlation measurements of the nuclear quadrupole interaction of181Hf(β−)181 and its temperature dependence in the low dimensional Hf- trichalcogenides HfS3, HfSe3 and HfTe3. In HfS3 the temperature dependence of the precession frequency is a slowly decreasing function with a negative curvature, the deviation from axial symmetry of the electric field gradient is practically temperature independent. In HfSe3 the NQI shows a peculiar behaviour; between 10K and 300K the quadrupole frequency and the asymmetry parameter increase, between 300K and 400K the frequency decreases while the deviation from axial symmetry increases, indicating a structural phase transition near room temperature. In HfTe3 the quadrupole frequency is practically temperature independent below 600K and increases linearely at higher temperatures, the asymmetry parameter increases steadily in the temperature range from 10K to 600K and then decreases. There is a strong correlation between the strength and the asymmetry of the electric field gradient so that the system depends on one control parameter only.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02399899
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  • 7
    Electronic Resource
    Electronic Resource
    In-vivo study of the nuclear quadrupole interaction of99Mo (β- 99)Tc in nitrogenase of Klebsiella pneumoniaein nitrogenase of Klebsiella pneumoniae (1990)
    Springer
    Hyperfine interactions 61 (1990), S. 1215-1218 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on the first TDPAC-measurements of the nuclear quadrupole interaction (NQI) of (NQI) of99Mo(β-)99Tc in the nitrogenase of the bacteria Klebsiella pneumoniae. Because nitrogenase is the only Mo-containing enzyme in Klebsiella pneumoniae under the chosen conditions, no further isolation of this enzyme was necessary. The majority of the incorporated99Mo is subjected to a well defined NQI with ω=365(7) Mrad/s, η=1 and a reorientational correlation time of τcoττ≈10nsec and is attributed to the active site of the FeMo cofactor. During sample preparation we noted a pronounced affinity of the bacteria to99mTc.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02407605
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  • 8
    Electronic Resource
    Electronic Resource
    TDPAC investigations of the111Cd quadrupole interaction in ternary chalcopyrite semiconductors (1991)
    Springer
    Hyperfine interactions 62 (1991), S. 373-377 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The quadrupole interaction at room temperature of111Cd in CdSiP2, CdGeP2, and CdSnP2 is investigated by111mCd-TDPAC. The results are compared with those of former111In(111Cd) measurements. We observed axially symmetric quadrupole interactions with identical quadrupole coupling constants provided that radiation damage was annealed. This proves that also In probes are positioned at Cd-sites (A-sites) in these ternary compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397716
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  • 9
    Electronic Resource
    Electronic Resource
    Gd magnetism studied by μSR at high pressure (1991)
    Springer
    Hyperfine interactions 64 (1991), S. 367-368 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02396162
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  • 10
    Electronic Resource
    Electronic Resource
    Heavy metal coordination chemistry in mercaptides and enzymes studied by TDPAC (1993)
    Springer
    Hyperfine interactions 80 (1993), S. 1079-1092 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Time differential perturbed angular correlation (TDPAC) studies of the coordination chemistry of the heavy metal atoms Cd and Hg via the nuclear quadrupole interaction are presented for the following systems; (i) mercury complexes with mercaptides, polymers with thiol groups, and ferrocenethiols. Mercury has a strong tendency to form linear or almost linear bonds with sulfur ligands. Evidence for 1,3-dithia-2-mercura[3]ferrocenophane formation is presented. (ii)111mCd-derivatives of the small electron transport proteins azurin, including a his 117gly mutant, and stellacyanin. The titration of the his 117gly mutant of azurin with imidazole was monitored in situ. (iii)111mCd- and199mHg-derivatives of the multi-Cu enzymes ascorbate oxidase and laccase. Reconstitution probabilities for Hg-reconstitution will be given as well as information on selective depletion and blocking of Cu-sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00567468
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