Examining the role of transfer coupling in sub-barrier fusion of 46,50Ti+124Sn

被引：24

作者：

Liang, J. F. ^{[1
,3
]}

Allmond, J. M. ^{[1
]}

Gross, C. J. ^{[1
]}

Mueller, P. E. ^{[1
]}

Shapira, D. ^{[1
]}

Varner, R. L. ^{[1
]}

Dasgupta, M. ^{[2
]}

Hinde, D. J. ^{[2
]}

Simenel, C. ^{[2
]}

Williams, E. ^{[2
]}

Vo-Phuoc, K. ^{[2
]}

Brown, M. L. ^{[2
]}

Carter, I. P. ^{[2
]}

Evers, M. ^{[2
,4
]}

Luong, D. H. ^{[2
]}

Ebadi, T. ^{[2
,5
]}

Wakhle, A. ^{[2
,6
]}

机构：

[1] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

[2] Australian Natl Univ, Dept Nucl Phys, Res Sch Phys Sci & Engn, Canberra, ACT 2601, Australia

[3] FLIR Syst Inc, Wilsonville, OR USA

[4] Australian Natl Univ, John Curtin Sch Med Res, Canberra, ACT, Australia

[5] Seeing Machines, Canberra, ACT, Australia

[6] MSU, Natl Superconducting Cyclotron Lab, Tirunelveli, Tamil Nadu, India

来源：

PHYSICAL REVIEW C | 2016年 / 94卷 / 02期

基金：

澳大利亚研究理事会;

关键词：

HEAVY-ION FUSION; COULOMB BARRIER; CA-40+SN-124; FISSION; NUCLEI; ENERGY; STATE;

D O I：

10.1103/PhysRevC.94.024616

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Background: The presence of neutron transfer channels with positive Q values can enhance sub-barrier fusion cross sections. Recent measurements of the fusion excitation functions for Ni-58+Sn-132,Sn-124 found that the fusion enhancement due to the influence of neutron transfer is smaller than that in Ca-40+Sn-132,Sn-124 although the Q values for multineutron transfer are comparable. Purpose: To investigate the differences observed between the fusion of Sn + Ni and Sn + Ca. Methods: Fusion excitation functions for Ti-46,Ti-50+Sn-124 have been measured at energies near the Coulomb barrier. Results: A comparison of the barrier distributions for Ti-46+Sn-124 and Ca-40+Sn-124 shows that the Ca-40+Sn-124 system has a barrier strength resulting from the coupling to the very collective octupole state in Ca-40 at an energy significantly lower than the uncoupled barrier. Conclusions: The large sub-barrier fusion enhancement in Ca-40 induced reactions is attributed to both couplings to neutron transfer and inelastic excitation, with the octupole vibration of Ca-40 playing a major role.

引用

页数：9

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