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

Abstract

We present new experimental angular distributions for the elastic scattering of 6 Li + 120 Sn at three bombarding energies. We include these data in a wide systematic involving the elastic scattering of 4,6 He, 7 Li, 9 Be, 10 B and 16,18 O projectiles on the same target at energies around the respective Coulomb barriers. Considering this data set, we report on optical model analyses based on the double-folding São Paulo Potential. Within this approach, we study the sensitivity of the data fit to different models for the nuclear matter densities and to variations in the optical potential strengths.

Investigation of the fusion process for B10+Au197 at near-barrier energies

“…This indicates that fusion is somehow favored for 10 B, while peripheral reaction channels, which are connected to strong surface absorption processes, are favored for the other weakly bound nuclei. This behavior seems to be connected to the projectile breakup energy threshold [15].…”

“…Although the elastic scattering represents the most direct and simplest process concerning a nuclear reaction, its description can become extremely challenging if the effect of couplings to nonelastic channels is strong. Particularly, in nuclear collisions involving weakly bound or radioactive nuclei, direct processes, such as transfer or breakup, can affect the dynamics of the reaction due to their cluster structure and low breakup energy threshold [8][9][10][11][12][13][14][15].…”

Systematic calculations of reactions with exotic and stable nuclei to establish a unified theoretical approach

“…In [43], Eq. ( 3) has been proposed to systematically study exotic and stable, tightly and weakly bound, nuclei projectiles ( 4,6 He, 6,7 Li, 9 Be, 10 B, 16,18 O) reacting on the same, 120 Sn, target nucleus, in a wide energy range.…”

“…We verified how data are most sensitive to the strength of the absorptive imaginary part, which tends to mostly vary as a function of the projectile binding energy (table I). Therefore, table I relies on projectiles studied in [43] and here. From [43], we concluded that lower the binding energy higher the absorptive imaginary strength, which tends to be meaningful even at longer interacting distances (R > 15 fm), mainly for describing reactions of stable weakly bound and exotic nuclei projectiles.…”

“…Therefore, table I relies on projectiles studied in [43] and here. From [43], we concluded that lower the binding energy higher the absorptive imaginary strength, which tends to be meaningful even at longer interacting distances (R > 15 fm), mainly for describing reactions of stable weakly bound and exotic nuclei projectiles.…”