Quasielastic transfer in the136Xe+64Nireaction

Autor: K. A. Farrar, F. Haas, D. Mahboub, Stephen Sanders, S. Cavallaro, F. W. Prosser, G. de Angelis, Christian Beck, R. H. Mayer, R. V. F. Janssens, M. Sferrazza, A. K. Dummer, T. L. Khoo, M. P. Carpenter, B. Fornal, D. Nisius
Rok vydání: 1997
Předmět:
Zdroj: Physical Review C. 55:2541-2555
ISSN: 1089-490X
0556-2813
DOI: 10.1103/physrevc.55.2541
Popis: Single and multinucleon transfer yields for the {sup 136}Xe+{sup 64}Ni reaction at a scattering energy {approx}5{percent} above the Coulomb barrier energy are studied using particle{endash}{gamma}-ray coincidence data. Q-value and scattering-angle distributions are extracted for the stronger channels. A fast transfer mechanism dominates the yields to these channels over an extended Q-value range, leading to a concentration of the cross section near the grazing angle. Analysis of the angular distributions based on a semiclassical barrier penetration model suggests that the single-nucleon and two-neutron exchange channels are dominated, respectively, by direct and two-step sequential transfer from the ground or low-lying excited states of the participating nuclei. The multiproton transfer channels have angular distributions that indicate a more complex mechanism, although direct cluster transfer from an excited configuration cannot be fully discounted. In a separate analysis, the relative population of different mass channels is found to be in general agreement with the expectations of a {open_quotes}random walk{close_quotes} model of particle exchange. {copyright} {ital 1997} {ital The American Physical Society}
Databáze: OpenAIRE
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