Neutron resonances in 142Ce

Abstract Neutron transmission and capture measurements have been made on natural cerium and separated isotope 142Ce at the TOF facility of the Japan Atomic Energy Research Institute linear accelerator. Resonance parameters of 142Ce have been newly determined up to 50 keV. The s-wave strength function S0, and average level spacing D0 were deduced to be S0=(2.7±0.6)x10−4, and D0=0.75±0.12 keV. Resonance parameters of N=82 nucleus 140Ce are also determined in the same energy region.