First observation of low-lying excited states in the very neutron-rich 95Kr

Microsecond isomers of neutron-rich nuclei in the mass 𝐴=95 chain were investigated at the ILL reactor in Grenoble. These nuclei were produced by thermal-neutron induced fission of
241
Pu
. The detection is based on time correlation between fission fragments selected by the Lohengrin mass spectrometer and the γ rays from the isomers. In this article, the decay scheme of an isomer of half-life 1.4(2) 𝜇s in
95
Kr
is reported. It is the first time that excited states of this nucleus have been measured. These data show that this neutron-rich 𝑁=59 isotone is spherical at low excitation energy.

Authors: J. Genevey, R. Guglielmini, R. Orlandi, J.A. Pinston, A. Scherillo, G. Simpson, I. Tsekhanovich, N. Warr, J. Jolie

Doi: PhysRevC.73.037308

Issue number:

Journal: Phys. Rev. C

Page number: 037308

Published on: 2006-03-21

Year: