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Influence of higher-order deformations in the ^{34}S + ^{168}Er fusion reaction

C. R. Morton·A. C. Berriman·R. D. Butt·M. Dasgupta·D. J. Hinde·A. Godley·J. O. Newton·K. Hagino
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Abstract

The shape of the measured barrier distribution for the ^{34}S + ^{168}Er reaction is analysed using the coupled-channels description. The ^{168}Er nucleus is a good candidate to test current fusion models description of deformation since it has a large quadrupole deformation with an insignificant hexadecapole deformation. Coupling to weaker channels, the 2^+_1 state in ^{34}S, the 3^-_1 state in ^{168}Er, and the pair neutron transfer channel, all were found to have little influence on the barrier distribution. A successful description of the barrier distribution was only obtained after the hexacontatetrapole deformation term in ^{168}Er (beta_6) was included in the coupling scheme. However, a positive value for beta_6 was needed where the macroscopic-microscopic model predicts a negative one.

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C. R. Morton, A. C. Berriman, R. D. Butt, M. Dasgupta, D. J. Hinde, A. Godley, J. O. Newton, K. Hagino. 2001-07-02. Influence of higher-order deformations in the ^{34}S + ^{168}Er fusion reaction. https://doi.org/10.1103/physrevc.64.034604

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