β decay of100In
| Autor: | C. Plettner, Z. Janas, R. Borcea, Ronald Schwengner, R. Kirchner, K. Schmidt, V. Belleguic, M. Gierlik, M. Karny, A. Blazhev, P. Munro, C. R. Bingham, E. Roeckl, C. Mazzocchi, L. Batist, H. Grawe, M. Górska, N. P. Harrington, J. Döring |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Physical Review C. 66 |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.66.044319 |
| Popis: | The \ensuremath{\beta} decay of ${}^{100}\mathrm{In},$ the one proton hole and one neutron particle neighbor to ${}^{100}\mathrm{Sn},$ was investigated at the GSI on-line mass separator by using germanium detectors and a NaI total-absorption spectrometer. On the basis of \ensuremath{\beta}\ensuremath{\gamma}\ensuremath{\gamma} coincidences, the ${}^{100}\mathrm{In}$ decay scheme was established for the first time. The ground-state spin and parity for ${}^{100}\mathrm{In}$ are discussed by investigating \ensuremath{\beta} feeding of levels in ${}^{100}\mathrm{Cd}$ and $\ensuremath{\beta}$-delayed proton emission to ${}^{99}\mathrm{Ag}.$ The half-life was remeasured and found to be 5.9(2) s. The ${Q}_{\mathrm{EC}}$ value was determined from the measured $EC/{\ensuremath{\beta}}^{+}$ ratio for the \ensuremath{\beta}-delayed protons to be 10.08(23) MeV. The main fraction of the \ensuremath{\beta} feeding was established to populate the region of 6 MeV excitation energy, which corresponds to a total Gamow-Teller (GT) strength of 3.9(9) and a centroid at 6.4 MeV. Large-scale shell-model calculations employing a realistic interaction are used to assign configurations to states in ${}^{100}\mathrm{In}$ and ${}^{100}\mathrm{Cd}.$ The GT \ensuremath{\beta}-decay strength distribution measured in the total absorption experiment is compared to shell-model predictions. The deduced overall hindrance of the GT strength agrees with the values predicted for the ${}^{100}\mathrm{Sn}$ GT decay. |
| Databáze: | OpenAIRE |
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