Anomaly Observed in Subbarrier Fusion-Fission Reactions

Liu Zuhua; Zhang Huanqiao; Xu Jincheng; Qian Xing; Qiao Yu; Lin Chengjian; Xu Kan

Chinese Physics C> 1995, Vol. 19> Issue(7) : 585-590

Anomaly Observed in Subbarrier Fusion-Fission Reactions

China Institute of Atomic Energy, Beijing, 102413

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Abstract：
The fusion-fission cross sections and fragment angular distributions for the systems of ¹⁶O＋²³²Th, ¹⁶O＋²³⁸U and ¹⁹F＋²³²Th at near-and sub-barrier energies have been measured. The enhancement of fusion-fission cross sections at subbarrier energies is well explained in the framework of coupled-channels theory in which the target static deformations are explicitly taken into account. However, the experimental fragment anisotropies obviously deviate from the predictions of the statistic fission model.

References

[1]

C.Y.Wong,Phys.Rev.Lett.,31（1973）766.[2]H.Esbensen,Nucl.Phys.,A352（1981）147.[3]C.H.DassoandS.Landowne,Comp.Phys.Comm.,46（1987）187.[4]P.H.Stelson;Phys.Lett,B205（1988）190.[5]R.Vandenboschetal,Phys.Rev.Lett,56（1986）1234.[6]H.Q.Zhany,J.C.Xu,Z.H.Liuetal,Phys.Lett,B218（1989）133.[7]R.Vandenbosch and J.R.Huizenga,Nuclear Fission（AcademicPress,NewYork,1973）.[8]P.D.Bond,Phys.Rev.,C32（1985）471.[9]H.Q.Zhang,Z.H.Liu,J.C.Xuetal,Phys.Rev.,C49（1994）926.[10]A.J.Sierk,Phys.Rev.,C33（1986）2039.[11]H.Rossner,D.J.Hind,J.R.Leighetal.,Phys.Rev.,C45（1992）719.[12]B.B.Back,R.R.Betts,P.Fernandez et al,Fission at subbarrier energies,The Sixth Winter Workshop On Nuclear Dynamics,Jackson Hole,Wyoming,USA（1990）.[13]V.E.Viola,K.Kwiakowski and M.Walker,Phys.Rev,C31（1985）1550.[14]B.B.Back,R.R.Betts,J.E.Gindleretal,Phys.Rev.,C32（1985）195.

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[3]	FENG Zhao-Qing , JIN Gen-Ming , ZHANG Feng-Shou , FU Fen , HUANG Xi . Dynamical Study on Fusion Mechanism near Coulomb Barrier. Chinese Physics C, 2005, 29(12): 1157-1161.
[4]	TIAN Jun-Long , WU Xi-Zhen , LI Zhu-Xia , WANG Ning , LIU Fu-Hu . Study on Fusion Potential Barrier in Heavy Ion Reactions Based on the Dynamical Model. Chinese Physics C, 2004, 28(7): 725-732.
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[13]	Qian Xing , Xu Jincheng , Liu Zuhua , Zhang Huanqiao , Jiang Dongxing , Ye Yanlin . Simulation of The Fission Fragment Angular Correlation For ¹⁶O+²³²Th At Barrier Energies. Chinese Physics C, 1994, 18(5): 385-391.
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[15]	SHENG Hong , HE Guo-Zhu . An Interpretation of Sub-Barrier Fusion Reaction Based on α Transfer Mechanism. Chinese Physics C, 1993, 17(2): 161-165.
[16]	XU Xiao-Ji , GUO Jun-Sheng , HU Zhi-Qiang , ZHOU Xiao-Hong , MA Rui-Chang , LIU Hong-Ye , LI Gui-Sheng , DU Yi-Fei . A New Decay Channel Discovered in β-Delayed α Decay of ²⁰Na. Chinese Physics C, 1993, 17(7): 577-581.
[17]	ZHANG Huan-Qiao , LIU Zu-Hua , XU Jin-Cheng , RUAN Ming , QIAN Xing , XU Kan , LV Jun . Fission-Fragment Angular Distributions for the ¹⁶O+²³⁸U Near-and Sub-Barrier Fusion-Fission Reaction. Chinese Physics C, 1992, 16(9): 826-831.
[18]	BAO Jing-Dong , ZHANG Jing-Shang , ZHUO Yi-Zhong . STUDY OF MULTIDIMENSIONAL FISSION WIDTH IN THE QUASI-STATIONARY APPROXIMATION. Chinese Physics C, 1990, 14(5): 464-468.
[19]	DAI Guang-Xi , QI Yu-Jin , ZHENG Ji-Wen , LIU Xi-Ming , , . INCOMPLETE AND SEQUENTIAL FISSION IN ²⁸Si+²³⁸U SYSTEMS. Chinese Physics C, 1990, 14(10): 912-918.
[20]	CHEN Ke-Liang , LIU Guo-Xing , ZHENG Ji-Wen , WANG Su-Fang , FAN Zhi-Guo . MEASUREMENTS OF ANGULAR MOMENTUM EFFECT OF FISSION BARRIER. Chinese Physics C, 1988, 12(5): 658-664.

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Liu Zuhua, Zhang Huanqiao, Xu Jincheng, Qian Xing, Qiao Yu, Lin Chengjian and Xu Kan. Anomaly Observed in Subbarrier Fusion-Fission Reactions[J]. Chinese Physics C, 1995, 19(7): 585-590.

Liu Zuhua, Zhang Huanqiao, Xu Jincheng, Qian Xing, Qiao Yu, Lin Chengjian and Xu Kan. Anomaly Observed in Subbarrier Fusion-Fission Reactions[J]. Chinese Physics C, 1995, 19(7): 585-590. shu

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Received: 1900-01-01
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Anomaly Observed in Subbarrier Fusion-Fission Reactions

Corresponding author: Liu Zuhua,

China Institute of Atomic Energy, Beijing, 102413

Received Date: 1900-01-01

Accepted Date: 1900-01-01

Available Online: 1995-07-05

Abstract: The fusion-fission cross sections and fragment angular distributions for the systems of ¹⁶O＋²³²Th, ¹⁶O＋²³⁸U and ¹⁹F＋²³²Th at near-and sub-barrier energies have been measured. The enhancement of fusion-fission cross sections at subbarrier energies is well explained in the framework of coupled-channels theory in which the target static deformations are explicitly taken into account. However, the experimental fragment anisotropies obviously deviate from the predictions of the statistic fission model.

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Anomaly Observed in Subbarrier Fusion-Fission Reactions

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