PT Journal
AU Taprogge, Jea
   Gadea, A
   Montaner-Piza, A
TI Identification of a millisecond isomeric state in Cd-129(81) via the detection of internal conversion and Compton electrons
SO Physics Letters B
JI Phys. Lett. B
PY 2014
BP 223
EP 227
VL 738
DI 10.1016/j.physletb.2014.09.047
LA English
DE Isomeric decays; Transition strengths; Shell model calculations
AB The decay of an isomeric state in the neutron-rich nucleus Cd-129 has been observed via the detection of internal conversion and Compton electrons providing first experimental information on excited states in this nucleus. The isomer was populated in the projectile fission of a U-238 beam at the Radioactive Isotope Beam Factory at RIKEN. From the measured yields of gamma-rays and internal conversion electrons, a multipolarity of E3 was tentatively assigned to the isomeric transition. A half-life of T-1/2 = 3.6(2) ms was determined for the new state which was assigned a spin of (21/2(+)), based on a comparison to shell model calculations performed using state-of-the-art realistic effective interactions.
ER