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Chinese Physics C> 2006, Vol. 30> Issue(2) : 105-107 

Near-barrier quasi-elastic cross sections and barrier distribution of 32S+90,96Zr

  •  China Institute of Atomic Energy, Beijing 102413, China

  • 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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    [1] . Timmers H et al. Nucl. Phys., 1998, A633: 4212. Mukherjee A et al. Phys. Rev., 2002, C66: 0346073. Scarlassara F et al. Progress of Theoretical Physics, 2004,154: 314. Rowly N et al. Phys. Lett., 1991, B254: 255. Timmers H et al. Nucl. Phys., 1995, A584: 1906. Rowly N et al. Phys. Lett., 1996, B373

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WU Xiu-Kun, LIN Cheng-Jian, YANG Feng, LIU Zu-Hua, ZHANG Huan-Qiao, ZHANG Chun-Lei and ZHOU Ping. Near-barrier quasi-elastic cross sections and barrier distribution of 32S+90,96Zr[J]. Chinese Physics C, 2006, 30(2): 105-107.
WU Xiu-Kun, LIN Cheng-Jian, YANG Feng, LIU Zu-Hua, ZHANG Huan-Qiao, ZHANG Chun-Lei and ZHOU Ping. Near-barrier quasi-elastic cross sections and barrier distribution of 32S+90,96Zr[J]. Chinese Physics C, 2006, 30(2): 105-107. shu
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Received: 2005-06-13
Revised: 2005-09-08
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Near-barrier quasi-elastic cross sections and barrier distribution of 32S+90,96Zr

    Corresponding author: WU Xiu-Kun,
  • China Institute of Atomic Energy, Beijing 102413, China
  • Received Date: 2005-06-13
  • Accepted Date: 2005-09-08
  • Available Online: 2006-02-05

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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