Probing the potential and reaction coupling effects ofLi6,7+Si28

Abstract

The excitation functions for 7 Li + 28 Si quasielastic scattering at 150 • and 170 • have been measured at suband near-barrier energies (0.6 to 1.3 V B ) and the corresponding barrier distributions derived. The results were analyzed within the framework of the optical model using a procedure similar to one used on previous results for 6 Li + 28 Si employing double-folded potentials calculated using the BDM3Y1 effective interaction. The variation of the surface strength of the optical potential as a function of incident energy was compared for the two systems 6 Li + 28 Si and 7 Li + 28 Si, the barrier distributions being used to help better define the potential at the lowest energies. The barrier distributions were also analyzed with continuum-discretized coupled-channel (CDCC) and coupled reaction channel (CRC) calculations as a means of investigating the influence of breakup and transfer reactions on these quantities for these light, weakly bound projectiles.

Recent developments in fusion and direct reactions with weakly bound nuclei

“…This has been observed for 58 Ni + 58 Ni, 90 Zr + 92 Zr and 60 Ni + 89 Y, and more recently similar results have been obtained for several other systems [312][313][314][315][316]. Before we discuss the physics involved in this phenomenon, one should understand clearly what one means by hindrance.…”

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].…”