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

Phys. Rev. C

73
037308
(2006)
J. Genevey, R. Guglielmini, R. Orlandi, J.A. Pinston, A. Scherillo, G. Simpson, I. Tsekhanovich, N. Warr, J. Jolie

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.

DOI
PhysRevC.73.037308
Published on
nwarr