Bi—dimension Position Sensitive Detector Used in the Study of Fusion Fission of Heavy Ions at the Sub—Coulomb Barrier Energy Region

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Tan Jilian, Zhang Jinxia, Jin Genming, Zhang Huanqiao, Qian Xing, Liu Zuhua and Xu Jincheng. Bi—dimension Position Sensitive Detector Used in the Study of Fusion Fission of Heavy Ions at the Sub—Coulomb Barrier Energy Region[J]. Chinese Physics C, 1997, 21(1): 8-14.
Tan Jilian, Zhang Jinxia, Jin Genming, Zhang Huanqiao, Qian Xing, Liu Zuhua and Xu Jincheng. Bi—dimension Position Sensitive Detector Used in the Study of Fusion Fission of Heavy Ions at the Sub—Coulomb Barrier Energy Region[J]. Chinese Physics C, 1997, 21(1): 8-14. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Bi—dimension Position Sensitive Detector Used in the Study of Fusion Fission of Heavy Ions at the Sub—Coulomb Barrier Energy Region

    Corresponding author: Tan Jilian,
  • Institute of Modern Physics,The Chinese Acadenry of Sciences,Lanzhou 7300002. China Institute of Atomic Energy,Beijing 102413

Abstract: The structure,operation principle and performance of the bi—dimension position sensitive avalanche chamber (BPAC) used in the study of fusion fission induced by heavy ions at the near and sub-Coulomb barrier energy region are describerd.
The fold angle distribution of fragments in different angle region for 84MeV(Ecm)16O+232Th reaction system was obtained by using BPAC,from which the angle distribution of transfer—fission fragments has been distinguished from that of compound mucleus fission fragments.It is thereby certified that transfer—fission is not the reason of anomalous anisotropies of fragment angle distribution.Meanwhile experimental results supported the preequilibrium fission model,in frame of which the anomalous anisotropies of fragment distribution was explained.

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