Competition between fusion-fission and quasifission processes in the $^{32}$S+$^{182,184}$W reactions

Details Competition between fusion-fission and quasifission processes in the $^{32}$S+$^{182,184}$W reactions Competition between fusion-fission and quasifission processes in the $^{32}$S+$^{182,184}$W reactions

2009-06-04

arxiv.org/abs/0906.0880v2

Phys.Rev.C81:034611,2010

Physics

Nuclear Physics

Nuclear Theory

28 pages, 13 figures, submitted to Phys. Rev. C

Scientific paper

10.1103/PhysRevC.81.034611

The angular distributions of fission fragments for the $^{32}$S+$^{184}$W reaction at center-of-mass energies of 118.8, 123.1, 127.3, 131.5, 135.8, 141.1 and 144.4 MeV were measured. The experimental fission excitation function is obtained. The fragment angular anisotropy ($\mathcal{A}_{\rm exp}$) is found by extrapolating the each fission angular distributions. The measured fission cross sections of the $^{32}$S+$^{182,184}$W reaction are decomposed into fusion-fission, quasifission and fast fission contributions by the dinuclear system model. The total evaporation residue excitation function for the $^{32}$S+$^{184}$W reaction calculated in the framework of the advanced statistical model is in good agreement with the available experimental data up to about $E_{\rm c.m.}\approx 160$ MeV. The theoretical descriptions of the experimental capture excitation functions for both reactions and quantities $K_0^2$, $<\ell^2>$ and $\mathcal{A}_{\rm exp}$ which characterize angular distributions of the fission products were performed by the same partial capture cross sections at the considered range of beam energy.

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