Near-barrier quasi-elastic cross sections and barrier distribution of 32S+90,96Zr |
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Authors: | WU Xiu-Kun LIN Cheng-Jian YANG Feng LIU Zu-Hua ZHANG Huan-Qiao ZHANG Chun-Lei ZHOU Ping |
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Institution: | China Institute of Atomic Energy, Beijing 102413, China |
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Abstract: | Quasi-elastic cross sections have been measured for 32S+90,96Zr with high accuracy near the Coulomb barrier at backward angles and the barrier distributions are extracted from them. We find that barrier distribution of 32S+96Zr is flat and extends to low energies. The sub-barrier fusion cross sections are strongly enhanced because of such barrier distribution. Compared with the reaction of 32S+90Zr, 32S+96Zr has stronger neutron transfers up to the six-neutron pickup, which is due to the positive Q values of neutron transfers in the latter. This indicates that the neutron transfer may play a role in the enhancement of sub-barrier fusion for 32S+96Zr. |
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