【摘要】 测量了在 2 5MeV/u6 He轰击9Be靶的破裂反应产生的α碎片双微分截面及角分布 ,并在Serber模型的框架下计算了在破裂反应中衍射破裂与擦去过程的贡献 ,并对结果进行了讨论 .结果表明基于包含衍射破裂和擦去过程的Serber模型可以对6 He的直接反应进行较好地描述 ,擦去过程的贡献远大于衍射破裂的贡献 .相对于6 Li而言 ,6 He较大的去 2n微分截面源于它的弱束缚特性更多还原

【Abstract】 Energy and angular distributions of α fragments produced in 25Mev/u 6He+ 9Be break up reaction were measured. We calculated double differential cross section and angle distribution of? 4He fragment for 6He breakup reaction in terms of direct process theory including nuclear diffraction dissociation and stripping process based on Serber model. The influence of the diffraction dissociation and abrasion process to the break up reaction is investigated by the Serber model. The theoretical analysis indicates that the large breakup cross section of? 6He comes mainly from the low two neutron separation energy, but the difference of radius size between 6He and 6Li has small influence on the results.更多还原