학술논문
Alpha-decay spectroscopy of 257Rf.
Document Type
Article
Author
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.
Source
Subject
*ALPHA decay
*EXCITED states
*SPECTROMETRY
*
*
Language
ISSN
1434-6001
Abstract
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 α -decay the 11/2 - [725] Nilsson configuration is also assigned to the first excited state of 257 Rf, lying at 74 keV. [ABSTRACT FROM AUTHOR]