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The N=47 Shell-model Nucleus 90Tc

Rudolph, Dirk LU ; Harder, A.; Kabadiyski, M. K.; Lieb, K. P.; Schubart, R.; Weiszflog, M.; Altmann, J.; Becker, F.; von Brentano, P. and Burkhard, T., et al. (1994) In Zeitschrift für Physik A Hadrons and Nuclei 349(2). p.105-113
Abstract
Lifetimes of high spin states in the nucleus Tc-90 have been measured via the fusion evaporation reactions Ni-58(Ar-36, 3pn)Tc-90 at 140 MeV and Ni-58(Cl-35, 2pn)Tc-90 at 120 MeV beam energy. The OSIRIS spectrometer as well as a new neutron-gamma-coincidence setup were used to measure lifetimes in the 10(-12) - 10(-9) s range by the recoil distance Doppler-shift method. By means of gamma-multiplicity and neutron-gated spectra fifteen lifetimes were deduced. The experimental branching ratios and transition probabilities are compared to predictions of shell model calculations in a restricted pi(p(1/2)), pi(g(9/2)), nu(p(1/2)), and nu(g(9/2)) configuration space. In most cases the agreement with the calculations using the Gross-Frenkel... (More)
Lifetimes of high spin states in the nucleus Tc-90 have been measured via the fusion evaporation reactions Ni-58(Ar-36, 3pn)Tc-90 at 140 MeV and Ni-58(Cl-35, 2pn)Tc-90 at 120 MeV beam energy. The OSIRIS spectrometer as well as a new neutron-gamma-coincidence setup were used to measure lifetimes in the 10(-12) - 10(-9) s range by the recoil distance Doppler-shift method. By means of gamma-multiplicity and neutron-gated spectra fifteen lifetimes were deduced. The experimental branching ratios and transition probabilities are compared to predictions of shell model calculations in a restricted pi(p(1/2)), pi(g(9/2)), nu(p(1/2)), and nu(g(9/2)) configuration space. In most cases the agreement with the calculations using the Gross-Frenkel parameters is striking but the results for several yrare states very sensitively depend on the residual interaction used. (Less)
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Zeitschrift für Physik A Hadrons and Nuclei
volume
349
issue
2
pages
105 - 113
publisher
Springer
external identifiers
  • scopus:0000099778
ISSN
0939-7922
DOI
10.1007/BF01291167
language
English
LU publication?
no
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92f926b7-78e3-4386-a66c-25ae66ab91ec (old id 3964599)
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http://link.springer.com/article/10.1007/BF01291167
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2013-08-13 18:52:53
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@article{92f926b7-78e3-4386-a66c-25ae66ab91ec,
  abstract     = {Lifetimes of high spin states in the nucleus Tc-90 have been measured via the fusion evaporation reactions Ni-58(Ar-36, 3pn)Tc-90 at 140 MeV and Ni-58(Cl-35, 2pn)Tc-90 at 120 MeV beam energy. The OSIRIS spectrometer as well as a new neutron-gamma-coincidence setup were used to measure lifetimes in the 10(-12) - 10(-9) s range by the recoil distance Doppler-shift method. By means of gamma-multiplicity and neutron-gated spectra fifteen lifetimes were deduced. The experimental branching ratios and transition probabilities are compared to predictions of shell model calculations in a restricted pi(p(1/2)), pi(g(9/2)), nu(p(1/2)), and nu(g(9/2)) configuration space. In most cases the agreement with the calculations using the Gross-Frenkel parameters is striking but the results for several yrare states very sensitively depend on the residual interaction used.},
  author       = {Rudolph, Dirk and Harder, A. and Kabadiyski, M. K. and Lieb, K. P. and Schubart, R. and Weiszflog, M. and Altmann, J. and Becker, F. and von Brentano, P. and Burkhard, T. and Dewald, A. and Eberth, J. and Hermkens, U. and Mylaeus, T. and Grawe, H. and Heese, J. and Maier, K. H.},
  issn         = {0939-7922},
  language     = {eng},
  number       = {2},
  pages        = {105--113},
  publisher    = {Springer},
  series       = {Zeitschrift für Physik A Hadrons and Nuclei},
  title        = {The N=47 Shell-model Nucleus 90Tc},
  url          = {http://dx.doi.org/10.1007/BF01291167},
  volume       = {349},
  year         = {1994},
}