Systematic study of the decay of Ba-118,Ba-122* formed in Kr-78,Kr-82-induced reactions at E-lab=5.5 MeV/nucleon

作者：Kaur Manpreet^*; Kumar Raj; Sharma Manoj K

来源：Physical Review C, 2012, 85(1): 014609.

DOI：10.1103/PhysRevC.85.014609

The dynamical cluster decay model (DCM) is applied in reference to recent data on Kr-78,Kr-82 + Ca-40 reactions at a bombarding energy of 5.5 MeV/nucleon. For the nuclear systems Ba-118,Ba-122*, experimental data for the complete charge spectrum are also available along with evaporation residue and fission cross sections. Within the DCM approach, we are able to fit the total fission and evaporation residue cross sections for spherical choice of nuclei by simultaneously fitting the neck length parameter. The effect of different level density parameters is also studied. Results of DCM calculations are compared with BUSCO-, GEMINI-, and DNS-based calculations. All the models use the maximum angular momentum l(max) as the fitting parameter, which in the DCM is fixed via the neck-length parameter (Lambda R) for the penetrability P -> 1. Also, the role of a nonzero pairing strength (delta > 0) is seen, using delta(T) in V-LDM as a fitting parameter, say, to Li data. The effect of different proximity potentials is also studied. Finally, some noncompound nucleus contribution is shown to be operating in the context of the reactions under study. The N/Z dependence of decay fragments is also studied for Ba isotopes with A = 114-126.

• 出版日期2012-1-19