Alpha-decay spectroscopy of $$^{257}$$Rf

Alpha-decay spectroscopy of $$^{257}$$Rf

The decay properties of states in $^{257}$Rf have been investigated with the detector array GABRIELA at the FLNR, Dubna. The electromagnetic decay of a new excited state in $^{253}$No has been observed. The state lies 750 keV above the ground state and is favourably populated in the alpha decay from...

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Veröffentlicht in:The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2022-01, Vol.58 (1), Article 6
Hauptverfasser: Hauschild, K., Lopez-Martens, A., Chakma, R., Chelnokov, M. L., Chepigin, V. I., Isaev, A. V., Izosimov, I. N., Katrasev, D. E., Kuznetsova, A. A., Malyshev, O. N., Popeko, A. G., Popov, Yu. A., Sokol, E. A., Svirikhin, A. I., Tezekbayeva, M. S., Yeremin, A. V., Asfari, Z., Dorvaux, O., Gall, B. J. P., Kessaci, K., Ackermann, D., Piot, J., Mosat, P., Andel, B.
Format: Artikel
Sprache:eng
Schlagworte:
Nuclear Experiment
Physics
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Zusammenfassung:The decay properties of states in $^{257}$Rf have been investigated with the detector array GABRIELA at the FLNR, Dubna. The electromagnetic decay of a new excited state in $^{253}$No has been observed. The state lies 750 keV above the ground state and is favourably populated in the alpha decay from a low-lying isomeric state in $^{257}$Rf. It decays to the 9/2$^-$ ground state by an M1 transition and is assigned the 11/2$^-$[725] Nilsson configuration. The presence of this state suggests a possible reinterpretation of the decay of the high-K isomer in $^{253}$No. Due to the favoured nature of the $\alpha $-decay the 11/2$^-$[725] Nilsson configuration is also assigned to the first excited state of $^{257}$Rf, lying at 74 keV.
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/s10050-021-00657-8