Analysis of intermediate and light mass fragments from composite systems Al26-29* formed in O-16,O-18+B-10,B-11 reactions

作者：Kaur Mandeep; Singh BirBikram^*; Sharma Manoj K; Gupta Raj K

来源：Nuclear Physics A, 2018, 969: 14-29.

DOI：10.1016/j.nuclphysa.2017.09.014

• Light particles
• Intermediate mass fragments
• Compound nucleus
• Dynamical cluster decay model

A comparative analysis of intermediate mass fragments (IMFs) and light particles (LPs) [equivalently, evaporation residues (ERs)] in the decay of Al-26,Al-27,Al-28,Al-29* has been carried out for reactions O-16 + B-10,B-11 and O-18 + B-10,B-11 at the energy range 1 MeV <= EIA <= 4 MeV, within dynamical cluster decay model (DCM) of collective clusterisation approach. We 'find that, for IMFs having Z = 3, 4, 5 and 6, the range of mass minima are Sigma(8)(i=5) A(i), Sigma(9)(i=8) A(i), Sigma(13)(i=9)A(i) and Sigma(15)(i=11) A(i), respectively. With increase in the mass of compound nuclei, Z = 6 becomes more prominent as compared to its neighboring fragments which is also observed in the experimental data. The LPs cross sections (sigma(Lps)) in the decay of Al26-29* are also estimated. We find that the value of Sigma P-0 of LPs for Al-26,Al-27* is less as compared to that for Al-28,Al-29*, contrary to the value of Sigma P. Eventually, the cross sections for LPs are having higher contribution in the decay of Al-28,Al-29* in agreement with the experimental data. As expected for light mass nuclei, the sigma(Lps) for Al-26,Al-27* find better comparison with experimental data for spherical considerations rather than beta(2) deformations. We also conform Bohr's hypothesis via the entrance channel independence for compound nucleus Al-28* formed through O-18 + B-10 and F-19+ Be-9 channels at an excitation energy E*(CN) similar to 44 MeV, by having a unique choice of neck length parameter Delta R for both the reactions.

• 出版日期2018-1