科研之友
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摘要
The excitation functions for the production of (262)Rf, (261)Rf, and (260)Rf isotopes via 4n-, 5n-, and 6n- decay channels from the (266)Rf* compound nucleus are studied within the dynamical cluster-decay model by including beta(2i) deformations and %26quot;hot-optimum%26quot; theta(i) orientations. For angular momentum effects, both the sticking and nonsticking moments of inertia are considered. For the sticking moment of inertia I-S, the 4n and 5n emission data are addressed nicely by using the nuclear proximity potential Prox-00, whereas the commonly used Prox-77 is found suitable only for the 4n-decay channel. On the other hand, in the limit of nonsticking moment of inertia I-NS, both Prox-00 and Prox-77 seem equally suitable to address all the observed neutron-decay channels in the beam energy range E-lab = 88.2 to 101.3 MeV. In addition to this, the role of proposed superheavy magic shells with proton magic Z = 114, 120, 126 and neutron magic N = 184 is also investigated, by using the I-NS approach. The relative depth of the minimum in the fragmentation potential, or maximum peaking of the preformation factor, suggests that, among all the three magic (Z, N) pairs, Z = 126 and N = 184 is the strongest superheavy magic shell closure required for analyzing the neutron-decay channels of the (266)Rf* compound nucleus.
- 出版日期2014-9-15
