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Possible Mechanisms of Ternary Fission in the 197Au+197Au System at 15 A MeV |
| TIAN Jun-Long1, LI Xian1, WU Xi-Zhen2, LI Zhu-Xia2,3, YAN Shi-Wei1 |
| 1College of Nuclear Science and Technology, Beijing Normal University, Beijing 1008752China Institute of Atomic Energy, Beijing 1024133Institute of Theoretical Physics, Chinese Academic of Sciences, Beijing 100190 |
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| Cite this article: |
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TIAN Jun-Long, LI Xian, WU Xi-Zhen et al 2009 Chin. Phys. Lett. 26 062502 |
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Abstract Ternary fission in 197Au+197Au collisions at 15 A \ MeV is investigated by using the improved quantum molecular dynamical (ImQMD) model. The experimental mass distributions for each of the three fragments are reproduced for the first time without any freely adjusting parameters. The mechanisms of ternary fission in central and semi-central collisions are dynamically studied. In direct prolate ternary fission, two necks are found to be formed almost simultaneously and rupture sequentially in a very short time interval. Direct oblate ternary fission is a very rare fission event, in which three necks are formed and rupture simultaneously, forming three equally sized fragments along space-symmetric directions in the reaction plane. In sequential ternary fission a binary division is followed by another binary fission event after hundreds of fm/c.
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| Keywords:
25.70.-z
24.10.-i
25.60.Je
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Received: 16 February 2009
Published: 01 June 2009
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| PACS: |
25.70.-z
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(Low and intermediate energy heavy-ion reactions)
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24.10.-i
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(Nuclear reaction models and methods)
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25.60.Je
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(Transfer reactions)
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