Final Report for Nuclear Resonance Fluorescence Measurements of 239Pu above 2.5 MeV

Johnson, M S ; McNabb, D P

关键词: BREMSSTRAHLUNG;    FREE ELECTRON LASERS;    RESONANCE FLUORESCENCE;   

DOI  :  10.2172/945889
RP-ID  :  LLNL-TR-409706
PID  :  OSTI ID: 945889
Others  :  TRN: US0901256

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

Nuclear Resonance Fluorescence measurements were performed at the free electron laser facility at UC Santa Barbara using a bremsstrahlung beam. Three endpoint energies were chosen for the bremsstrahlung to cover as much area above 2.5 MeV as possible. We were able to set an upper limit of NRF state strengths between 2.5 and 3.8 MeV at roughly 38(5) eV barns at the 4-sigma level and 9(2) eV barns at the 1-sigma level. Published results on states near 2.4 MeV indicate strengths about 10(2) eV barns. Details of the results are presented in this report.