^(20)Ne(14.7,19.2MeV/u)+^(58)Ni反应中类弹碎片与α粒子的关联研究

Study ou the Correlation between Projectile-Like Fragments And α-Particles in ^(20)Ne (14.7, 19.2 MeV/u) +^(58)Ni Reactions

我们研究了在^(20)Ne(14.7MeV/u,19.2MeV/u)+^(58)Ni的反应中出射的类弹碎片与α粒子的符合,发现除了原始激发碎片的相继衰变产生这种符合事件以外,还有一种反应过程导致深度耗散的类弹碎片与前方向α粒子的“非关联”符合,这种过程意味着α粒子在反应初期就从弹核^(20)Ne中飞出,而剩余的^(16)O继而与靶核进行的一种耗散碰撞,我们称之为“非完全的深部非弹性过程”。

The coincidence between projectile-like fragments and α-particles emitted frorn ^(20)Ne (14.7MeV/u, 19.2MeV/u)+^(58)Ni reactions has been studied. The coincident events were caused by the sequential decay of the excited primary fragments and by the 'uncorrelated' coinciden- ce between forward emitted α-particles and projectile-like fragments, formed in a deeply dissi- pated reaction process, as well. This reaction process means, that the α-particle flied off from the Ne ^(20)Ne projectile in the initial stage of the reaction, and then the residual ^(16)O collides with the target nucleus dissipatively. It is called 'Incomplete Deep Inelastic Process'.