SEARCH FOR INDEPENDENT FORMATION OF Cs^134<i>m</i> IN FISSION

Abstract

The independent yield of Cs 14m in thermal neutron fission of U 235 is less than 1.7 × 10 −6 of the mass 134 chain yield and that of Cs 136 was found to be (0.94 ± 0.04) × 10 −3 of the mass 136 chain yield. The half-life for Cs 134m was measured as 2.91 ± 0.01 hours.