Eur. Phys. J. A (2014) 50: 184
https://doi.org/10.1140/epja/i2014-14184-8

Regular Article - Theoretical Physics

Disagreement between capture probabilities extracted from capture and quasi-elastic backscattering excitation functions

¹ Joint Institute for Nuclear Research, 141980, Dubna, Russia
² Yerevan State University, 0025, Yerevan, Armenia
³ Instituto de Fisica, Universidade Federal Fluminense, Av. Litorânea, s/n, 24210-340, Niterói, R.J., Brazil

^* e-mail: adamian@theor.jinr.ru

Received: 19 September 2014
Revised: 15 November 2014
Accepted: 30 November 2014
Published online: 18 December 2014

Abstract

Experimental quasi-elastic backscattering and capture (fusion) excitation functions are usually used to extract the s -wave capture probabilities for the heavy-ion reactions. We investigated the ¹⁶O + ¹²⁰Sn , ¹⁴⁴Sm , ²⁰⁸Pb systems at energies near and below the corresponding interaction barriers and concluded that the probabilities extracted from quasi-elastic data are much larger than the ones extracted from fusion excitation functions at sub and deep-sub barrier energies. This seems to be a reasonable explanation for the known disagreement observed in the literature for the nuclear potential diffuseness derived from both methods.