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《中国物理C》(英文)编辑部
2024年10月30日

Role of projectile breakup effects and intrinsic degrees of freedom on fusion dynamics

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Manjeet Singh Gautam. Role of projectile breakup effects and intrinsic degrees of freedom on fusion dynamics[J]. Chinese Physics C, 2016, 40(5): 054101. doi: 10.1088/1674-1137/40/5/054101
Manjeet Singh Gautam. Role of projectile breakup effects and intrinsic degrees of freedom on fusion dynamics[J]. Chinese Physics C, 2016, 40(5): 054101.  doi: 10.1088/1674-1137/40/5/054101 shu
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Received: 2015-07-09
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    Supported by Dr. D. S. Kothari Post-Doctoral Fellowship Scheme sponsored by University Grants Commission(UGC), New Delhi, India

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Role of projectile breakup effects and intrinsic degrees of freedom on fusion dynamics

    Corresponding author: Manjeet Singh Gautam,
  • 1. Department of Physics, Indus Degree College, Kinana, Jind-126102(Hargana), India
Fund Project:  Supported by Dr. D. S. Kothari Post-Doctoral Fellowship Scheme sponsored by University Grants Commission(UGC), New Delhi, India

Abstract: This article analyzed the fusion dynamics of loosely bound and stable projectiles with Zr-target isotopes within the context of the coupled channel approach and the energy-dependent Woods-Saxon potential model(EDWSP model). In the case of the 28Si+90Zr reaction, the coupling to the inelastic surface excitations results in an adequate description of the observed fusion dynamics while in case of the 28Si+94Zr reaction, the coupling to collective surface vibrational states as well as the neutron(multi-neutron) transfer channel is necessary in the coupled channel calculations to reproduce the below-barrier fusion data. However, the EDWSP model calculation provides an accurate explanation of the fusion data of 28Si+90, 94Zr reactions in the domain of the Coulomb barrier. In the fusion of the 6Li+90Zr reaction, the inclusion of the nuclear structure degrees of freedom recovers the observed sub-barrier fusion enhancement but results in suppression of the above barrier fusion data by 34% with respect to the coupled channel calculations. Using EDWSP model calculations, this suppression factor is reduced by 14% and consequently, the above-barrier fusion data of 6Li+90Zr reaction is hindered by 20% with reference to the EDWSP model calculations. Such fusion hindrance at above-barrier energies can be correlated with the breakup of the projectile(6Li) before reaching the fusion barrier, as a consequence of low binding energy.

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