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

Tan Jilian; Zhang Jinxia; Jin Genming; Zhang Huanqiao; Qian Xing; Liu Zuhua; Xu Jincheng

Chinese Physics C> 1997, Vol. 21> Issue(1) : 8-14

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

Institute of Modern Physics,The Chinese Acadenry of Sciences,Lanzhou 7300002. China Institute of Atomic Energy,Beijing 102413

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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(E_cm)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.

References

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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.

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 1900-01-01

Accepted Date: 1900-01-01

Available Online: 1997-01-05

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(E_cm)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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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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