Study of Dissipative Collisions of $^{20}$Ne ($\sim$7-11 MeV/nucleon) + $^{27}$Al

Details Study of Dissipative Collisions of $^{20}$Ne ($\sim$7-11 MeV/nucleon) + $^{27}$Al Study of Dissipative Collisions of $^{20}$Ne ($\sim$7-11 MeV/nucleon) + $^{27}$Al

2006-08-22

arxiv.org/abs/nucl-ex/0608039v1

Phys.Rev.C75:064606,2007

Physics

Nuclear Physics

Nuclear Experiment

16 pages, 9 figures

Scientific paper

10.1103/PhysRevC.75.064606

The inclusive energy distributions of complex fragments (3 $\leq$Z $\leq$ 9) emitted in the reactions $^{20}$Ne (145, 158, 200, 218 MeV) + $^{27}$Al have been measured in the angular range 10$^{o}$ - 50$^{o}$. The fusion-fission and the deep-inelastic components of the fragment yield have been extracted using multiple Gaussian functions from the experimental fragment energy spectra. The elemental yields of the fusion-fission component have been found to be fairly well exlained in the framework of standard statistical model. It is found that there is strong competition between the fusion-fission and the deep-inelastic processes at these energies. The time scale of the deep-inelastic process was estimated to be typically in the range of $\sim$ 10$^{-21}$ - 10$^{-22}$ sec., and it was found to decrease with increasing fragment mass. The angular momentum dissipations in fully energy damped deep-inelastic process have been estimated from the average energies of the deep-inelastic components of the fragment energy spectra. It has been found that, the estimated angular momentum dissipations, for lighter fragments in particular, are more than those predicted by the empirical sticking limit.

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