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近垒能区重离子核反应的一个重要特点是非弹激发和转移等耦合道效应的卷入。其中,对于中子转移耦合道效应目前还无定论。为进一步研究该效应,测量了近垒能区~(18)O+~(74)Ge和~(16)O+~(76)Ge体系的熔合激发函数,以研究正Q_(-2n)值转移道对垒下能区熔合反应截面的影响。两个靶核的低激发态性质接近,~(18)O+~(74)Ge体系的Q_(-2n)为+3.75 MeV。对于~(16)O+~(76)Ge体系,没有正Q值中子转移道。因此,相比~(16)O+~(76)Ge体系,~(18)O+~(74)Ge可能存在额外
An important feature of heavy ion nuclear reactions near the barrier region is the involvement of coupling effects such as non-elastic excitation and transfer. Among them, the neutron transfer coupling effect is still inconclusive. In order to further study this effect, the fusion excitation function of ~ (18) O + ~ (74) Ge and ~ (16) O + ~ (76) Ge systems in the near- The impact of the next energy zone fusion reaction cross-section effect. The lower excited states of the two target nuclei are close to each other, and Q_ (- 2n) of ~ (18) O + ~ (74) Ge system is +3.75 MeV. For the ~ (16) O + ~ (76) Ge system, there is no positive Q value neutron transfer path. Therefore, 18 18 O + ~ (74) Ge may be extra compared to the ~ (16) O + ~ (76) Ge system