Fusion ofS32 + Zr94: Further exploration of the effect of the positive

H. M. Jia

¹

,

C. J. Lin

²

,

Yan Feng

³

et al.

Self-consistent analysis of sub-barrier fusion enhancement effect in Ca + Ca and Ni + Ni

“…This process also relates to the current synthesis mechanism of the superheavy elements (SHE) [1] and has important implication for nucleosynthesis in astrophysics [2]. Therefore, this reaction process has attracted plenty of research in the last decades [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Coupled-channels description of multinucleon transfer and fusion reactions at energies near and far below the Coulomb barrier

“…The coupling to a transfer degree of freedom is in general weaker than couplings to collective excitations. However, when the coupling is sufficiently large, e.g., for a transfer channel with a positive Q-value, it is expected that the transfer coupling leads to an extra enhancement of fusion cross sections below the Coulomb barrier [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Theoretical study of fusion reactions 32S + 94,96Zr and 40Ca + 94,96Zr and quadrupole deformation of 94Zr

“…But, for 32 S + 94 Zr and 40 Ca + 94 Zr, the calculated results underestimate the sub-barrier cross sections considerably. To understand this underestimation, we follow Jia et al [41] and examine the relative enhancement. The relative enhancement is calculated as the ratio of the experimental fusion cross section to the calculated result by using the ECC model without the coupling to the neutron transfer channels considered, i.e., f R.E.…”

“…Broglia et al [29,30] suggested that the coupling to transfer channels with positive Q values is needed to explain the enhancement of fusion data for the Ni + Ni systems. Large enhancements of subbarrier fusion cross sections have been also observed in many other reaction systems with positive Q-value neutron transfer (PQNT) channels, such as the reaction systems 32 S + A Pd (A = 104-106, 108, and 110) [36], 40 Ca + 44,48 Ca [37], 40 Ca + 94,96 Zr [38,39], and 32 S + 94,96 Zr [40,41]. For some of these systems, the fusion excitation functions have been measured in sufficiently small energy steps, which can be used to extract the underlying barrier distributions to study the contribution from transfer channels.…”

“…In Ref. [41], a large enhancement for the sub-barrier fusion cross sections was deduced in 32 Ca + 94,96 Zr with the universal fusion function (UFF) formalism and the ECC model. We will first investigate the dynamic coupling effects on fusion cross sections with the UFF formalism.…”