中子与9Be和6,7Li反应的次级中子发射谱实验研究
중자여9Be화6,7Li반응적차급중자발사보실험연구
Measurements of Neutron Emission Spectra for Neutron Induced Reactions on 9Be and 6,7Li
  • 万方数据
    高能物理与核物理 고능물리여핵물리
    HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS
    2007年 5期 442-447 ,共6页

    阮锡超%周祖英%陈国长%祁步嘉%李霞%黄翰雄%仲启平%唐洪庆%蒋婧%辛标%鲍杰%陈霖%张竞上

    원석초%주조영%진국장%기보가%리하%황한웅%중계평%당홍경%장청%신표%포걸%진림%장경상

    次级中子%双微分截面%非常规快中子飞行时间谱仪%破裂中子 次級中子%雙微分截麵%非常規快中子飛行時間譜儀%破裂中子
    차급중자%쌍미분절면%비상규쾌중자비행시간보의%파렬중자
    secondary neutron%double differential cross section%abnormal fast neutron TOF spectrometer%breakup neutron
    测量了8.17MeV与10.27MeV中子与9Be和6,7Li作用的次级中子双微分截面.对于10.27MeV,为了消除从D(d,np)破裂反应来的源破裂中子对双微分截面测量结果的影响,采用了常规多探测器快中子飞行时间谱仪和非常规多探测器快中子飞行时间谱仪相结合的办法.用Monte-Carlo方法对实验测量得到的飞行时间谱进行了详细的模拟,通过测量谱与模拟谱的比较,得到了实验测量的次级中子双微分截面.实验测量结果以n-p(常规谱仪)和n-C(非常规谱仪)弹性散射微分截面作为归一.测量结果与评价数据以及其他测量数据进行了比较.用一个基于Hauser-Feshbach和激子模型的轻核核反应理论模型对6,7Li的次级中子双微分截面进行了计算,理论计算结果与实验结果符合得较好.
    측량료8.17MeV여10.27MeV중자여9Be화6,7Li작용적차급중자쌍미분절면.대우10.27MeV,위료소제종D(d,np)파렬반응래적원파렬중자대쌍미분절면측량결과적영향,채용료상규다탐측기쾌중자비행시간보의화비상규다탐측기쾌중자비행시간보의상결합적판법.용Monte-Carlo방법대실험측량득도적비행시간보진행료상세적모의,통과측량보여모의보적비교,득도료실험측량적차급중자쌍미분절면.실험측량결과이n-p(상규보의)화n-C(비상규보의)탄성산사미분절면작위귀일.측량결과여평개수거이급기타측량수거진행료비교.용일개기우Hauser-Feshbach화격자모형적경핵핵반응이론모형대6,7Li적차급중자쌍미분절면진행료계산,이론계산결과여실험결과부합득교호.
    The neutron emission double-differential cross sections(DDXs) of n+9Be and 6,7Li were measured at incident neutron energies of 8.17 and 10.27MeV. At 10.27MeV, the influence of breakup source neutrons from D(d, np) reactions was eliminated by using the combination of abnormal and normal fast neutron TOF spectrometers. The measured TOF spectra were analyzed by detailed Monte-Carlo simulation and the DDXs were determined by comparing the measured TOF spectra with simulated ones. The cross sections were normalized to n-p(normal geometry measurement) or n-C(abnormal geometry measurement) scattering measurement. The measured results were compared with the evaluations and the other measurements. A theoretical model based on the Hauser-Feshbach and exciton model for light nuclei was used to describe the double-differential cross sections of n+6,7Li. Good agreement between theoretical calculation and measurement has been obtained.
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