Subbarrier Complete Fusion-Fission Reactions of <SUP>16</SUP>)O+<SUP>232</SUP>Th

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

Chinese Physics C> 1994, Vol. 18> Issue(6) : 489-495

Subbarrier Complete Fusion-Fission Reactions of ¹⁶)O+²³²Th

China Institute of Atomic Energy, Beijing,102413

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Abstract：
We have succeeded in isolating the complete arising from complete fusion-fission in terms of the fragment folding angle technique,and measured complete fusion-fission cross sections and fragment angular distributions for the ¹⁶O+²³²Th system in the center-of-mass energies between 72.61 and 80.11 MeV.The observed fission excitation function is in quite good agreement with the expectation of the coupled-channels theory.However,the measured fragment angular distributions are more anisotropic than the predictions of both the saddle-point transition-state model and scission model.

References

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M.Beckerman,Phys.Rep.129（1985）145.[2]C.H.Dasso,S.Landowne and A.Winther,Nucl.Phys.,A405（1983）381.[3]R.Vandenbosh,B.B.Back,S.Gil,A.Lazzarini and A.Ray,Phys.Rev,C28（1983）1161.[4]R.Vandenbosh,T.Murakami and C.-C.Sabm et al,Phys.Rev.Lett,56（1986）1234.[5]H.Q.Zhang,J.C.Xu and Z.H.Liu et al,Phys.Rev,C42（1990）1086.[6]J.Fernandez-Niello,C.H.Dasso and S.Landowne,Comp.Phys.Comm,54（1988）409.[7]钱兴、张焕乔、刘祖华等，高能物理与核物理，17（1993）173.[8]钱兴、许谨诚、刘祖华等，高能物理与核物理，18（1994）385.[9]R.Vandenbosh and J.R.Huizenga,Nuclear Fission,Academic Press,New York,1973.[10]A.J.Sierk,Phys.Rev,C33（198）2039.[11]P.D.Bond,Phys.Rev.Lett,52（1984）414;Phys.Rev,C32（1985）471.H.H.Rossner,J.R.Huizenga and W.U.Schroder,Phys,Rev.Lett.53（1984）38;Phys.Rev.C33（1986）560.[12]D.J.Hinde,H.Ogata,M.Tanaka,T.Shimoda,N.Takahashi,A.Shinohara.S.Wakamatsu,K.Katori and H.Okamora,Phys.Rev,C39（1989）2268.[13]B.B.Back,R.R.Eetts and P.Fernandez et al.,Sixth Winter Workshop on Nuclear Dynamics,Jackson Hole,Wyoming,U.S.A.（1990）.

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Liu Zuhua, Xu Jincheng, Zhang Huanqiao, Qian Xing, Qiao Yu, Lin Chengjian and Xu Kan. Subbarrier Complete Fusion-Fission Reactions of ¹⁶)O+²³²Th[J]. Chinese Physics C, 1994, 18(6): 489-495.

Liu Zuhua, Xu Jincheng, Zhang Huanqiao, Qian Xing, Qiao Yu, Lin Chengjian and Xu Kan. Subbarrier Complete Fusion-Fission Reactions of ¹⁶)O+²³²Th[J]. Chinese Physics C, 1994, 18(6): 489-495. shu

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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

Subbarrier Complete Fusion-Fission Reactions of ¹⁶)O+²³²Th

Corresponding author: Liu Zuhua,

China Institute of Atomic Energy, Beijing,102413

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1994-06-05

Abstract: We have succeeded in isolating the complete arising from complete fusion-fission in terms of the fragment folding angle technique,and measured complete fusion-fission cross sections and fragment angular distributions for the ¹⁶O+²³²Th system in the center-of-mass energies between 72.61 and 80.11 MeV.The observed fission excitation function is in quite good agreement with the expectation of the coupled-channels theory.However,the measured fragment angular distributions are more anisotropic than the predictions of both the saddle-point transition-state model and scission model.