【摘 要】
：
报道了经仔细设计的150MeV 6He+9Be实验,并在质心系大角度处测量 10Be和 11Be同位素产物的实验数据. 鉴别得到相应于单中子转移的371个 10Be事件,同时观测到了相应于双中子转
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报道了经仔细设计的150MeV 6He+9Be实验,并在质心系大角度处测量 10Be和 11Be同位素产物的实验数据. 鉴别得到相应于单中子转移的371个 10Be事件,同时观测到了相应于双中子转移的5个 11Be事件. 由此得到相应微分截面分别为(0.11±0.02)mb/sr(θcm≈137.4°)和(1.0±0.7)μb/sr(θcm≈133.4°),结果表明在所研究的反应体系中,单中子转移截面要比双中子转移截面约大100倍. 在 6He由 5He-n和α-2n组成的集团模型下,利用零力程扭曲波玻恩近似(DWBA)的计算程序,在数量级上重现了单、双中子转移反应的实验数据.
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