Measurements of neutron spallation cross sections of 12C and 209Bi in the 20- to 150-MeV energy range

摘要: The neutron spallation cross sections of {sup 12}C and 209}Bi have been measured in the quasimonoenergetic p-{sup 7}Li fields 20- 150-MeV energy range. irradiation experiments were performed at four cyclotron facilities: (a) Institute for Nuclear Study (INS), University Tokyo; (b) Cyclotron Radioisotope Center, Tohoku University; (c) Takasaki Research Establishment (TIARA), Japan Atomic Energy Institute; (d) Physical Chemical (RIKEN). spectrum has with time-of-flight method using an organic liquid scintillator, absolute value peak fluence estimated from activation lithium target INS, RIKEN, proton recoil counter telescope TIARA. cross-section data 12}C(n,2n){sup 11}C 209}Bi(n,xn) (x = 3.12) reactions are reported. experimental compared other [only 12}C(n2n){sup 209}Bi(n,3n){sup 207}Bi reactions] ENDF/B-VI high-energy file data. comparison showed good agreement between authors others. Their above 20 MeV 40 first will be applied tomore » spectrometry Bi detector.« less