Quasi-elastic backscattering of 6,7Li on light, medium and heavy targets at near- and sub-barrier energies

Abstract

Abstract.We have performed precision elastic backscattering measurements for the weakly bound nuclei 6,7 Li on the medium and heavy mass targets 58 Ni, 116,120 Sn and 208 Pb at sub-and near-barrier energies (E c.m./Vbar = 0.6 to 1.3). Excitation functions of elastic scattering cross-sections have been measured at ±160• and ±170• and the corresponding ratios to Rutherford scattering and relevant barrier distributions have been extracted. These measurements complement recent work on a 28 Si target, for probing systematically the potential at sub-and near-barrier energies and relevant reaction mechanisms, while indicate a possible breakdown of the dispersion relation.

Systematic study of optical potential strengths in reactions on Sn120 involving strongly bound, weakly bound, and exotic nuclei

“…For comparison, in Fig. 6 we present an excitation function for the elastic scattering of 6 Li + 120 Sn from earlier measurements [28]. The data correspond to an angular range of 160 o ≤ θ Lab ≤ 170 o .…”

“…In addition to our data, other experimental elastic scattering cross sections, for systems involving 120 Sn as target, were obtained from [22][23][24][25][26][27][28][29].…”

“…(Color online) Experimental excitation function for6 Li + 120 Sn[28] (see text for details). The solid line represents the SSA cross sections at θc.m.…”

Fusion and quasi-elastic scattering in theLi6,7+Au197Palshetkar1, Thakur2, Nanal3 et al. 2014Phys. Rev. C660220View full textAdd to dashboardCite

“…Owing to conservation of the reaction flux, the fusion and QEL scattering process can be considered complementary and barrier distributions obtained from both types of measurements are expected to be similar [8]. Recently such studies have been carried out using weakly bound stable nuclei [9][10][11][12][13][14][15]. In some cases [9,10,13] it has been found that the barrier distribution obtained from QEL scattering including only the elastic + inelastic + transfer channels peaks at a lower energy compared to the corresponding barrier distribution obtained from fusion.…”

Quasielastic backscattering and barrier distributions for the6,7Li+64Znsystems

“…Several studies of fusion barrier distributions for systems with weakly bound projectiles have been reported about a decade ago [16][17][18][19]. QEL and elastic-scattering barrier distributions for systems involving weakly bound nuclei have been studied only recently [12,[20][21][22][23][24][25][26], with the exception of Ref. [17].…”