Alpha-decay spectroscopy of 257 Rf
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 Y.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.
January 2022Springer Science and Business Media Deutschland GmbH
European Physical Journal A
2022#58Issue 1
The decay properties of states in 257Rf have been investigated with the detector array GABRIELA at the FLNR, Dubna. The electromagnetic decay of a new excited state in 253No 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 257Rf. 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 253No. Due to the favoured nature of the α-decay the 11/2-[725] Nilsson configuration is also assigned to the first excited state of 257Rf, lying at 74 keV.
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JCLab, IN2P3-CNRS, Université Paris Saclay, Orsay, 91405, France
FLNR, JINR, Dubna, Russian Federation
Dubna State University, Dubna, Russian Federation
The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
CNRS, IPHC UMR 7178, Université de Strasbourg, Strasbourg, 67000, France
GANIL, 14076, Caen Cedex 5, France
Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, Bratislava, 84248, Slovakia
JCLab
FLNR
Dubna State University
The Institute of Nuclear Physics
CNRS
GANIL
Department of Nuclear Physics and Biophysics
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