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《中国物理C》（英文）编辑部
2024年10月30日
Chinese Physics C> 2003, Vol. 27> Issue(5) : 430-435 

Study on the Giant Dipole Resonance Model for γ Production Mechanisms Induced by Fast Nutrons in the Nuclear Mass Region 180≤A≤210

  •  Department of Physics,Zhengzhou University,Zhengzhou 450052,China

  • The subjects related to the giant dipole resonance model for the γ production mechanisms induced by fast neutrons have been studied in the nuclear mass region 180≤A≤210.It contains the difference between the γ-ray strength functions of the cascad γ deexcitation processes in the (n,γ)and (n,n′γ)reactions as well as the variation tendency of the reaction cross section ratios between the direct-semidirect radiative captures and the compound nucleus statistical processes with the incident energies, nuclear mass numbers and the nuclear shells. The numerical calculations and the comparisons with the experimental values for 181Ta,Au and 208Pb have been done in the nentron incident energy region from 1 MeV to 20MeV. The analyses and discussions to the results have also been given.
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  • References

    [1] Axel P.Phys.Rev.,1962,126:6712 Kopecky J.Gamma-Ray Strength Functions,in:Oblozinsky P.Hand-book for calculations of nuclear Data.Vienna:the IAEA ,1998.97—1113　DING Da-Zhao.Progress in Neutron Radiative Capture Stuty.Nuclear Physics.Material Compilation of the Conference in 1978.Beijing:Atomic Energy Press,1979,292—306(in China)　　(丁大钊.中子辐射俘获研究进展.原子核物理,1978年会议资料选编,北京:原子能出版社,1979,292—306)4 LIU Jian-Feng et al.High Energy Phys.and Nucl.Phys.,2001,25(10):994(in Chinese)(刘建峰等.高能物理与核物理,2001,25(10):994)5 Allen B J et al.Advanced in nucl.Phys.,1978,10:1296 HUO Yu–kun et al.Nucl.Phys.,1983,A406:17 LIU Jian–Feng et al.High Energy Phys.and Nucl.Phys.,1983,7(3):355(in Chinese)(刘建峰等.高能物理与核物理,1983,7(3):355)8 LIU Jian–Feng et al.High Energy Phys.and Nucl.Phys.,1991,15(4):349(in Chinese)(刘建峰等.高能物理与核物理,1991,15(4):349)9 LIU Jian–Feng et al.Chinese Physics,1988,2:45510 HUOYu–Kun et al.High Energy Phys.and Nucl.Phys.,1989,13(5):465(in Chinese)(霍裕昆等.高能物理与核物理,1989,13(5):465)11 Potokar M et al.Nucl.Phys.,1977,A227:2912 Potokar M.Physics Letters,1973,3:34613 Ajzenberg–selove F.Nucl.Phys.,1984,A413:114 Becchetti F D et al.Phys.Rev.,1969,182:119015 Gilbert A ,Cameron A G W.Can.J.Phys.,1965,43:144616 Dietrich S S et al.Atomic Data and Nuclear Data Tables,1988,38:19917 EXFOR(Exchange FORmat),computerized system for the storage,re trieval and international exchange of experimental nuclear reaction data,coordinated by the IAEA Nuclear Data Section

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LIU Jian-Feng, JIA Min and ZHAO Wei-Juan. Study on the Giant Dipole Resonance Model for γ Production Mechanisms Induced by Fast Nutrons in the Nuclear Mass Region 180≤A≤210[J]. Chinese Physics C, 2003, 27(5): 430-435.
LIU Jian-Feng, JIA Min and ZHAO Wei-Juan. Study on the Giant Dipole Resonance Model for γ Production Mechanisms Induced by Fast Nutrons in the Nuclear Mass Region 180≤A≤210[J]. Chinese Physics C, 2003, 27(5): 430-435. shu
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Received: 2002-11-08
Revised: 1900-01-01
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Study on the Giant Dipole Resonance Model for γ Production Mechanisms Induced by Fast Nutrons in the Nuclear Mass Region 180≤A≤210

    Corresponding author: LIU Jian-Feng,
  • Department of Physics,Zhengzhou University,Zhengzhou 450052,China
  • Received Date: 2002-11-08
  • Accepted Date: 1900-01-01
  • Available Online: 2003-05-05

Abstract: The subjects related to the giant dipole resonance model for the γ production mechanisms induced by fast neutrons have been studied in the nuclear mass region 180≤A≤210.It contains the difference between the γ-ray strength functions of the cascad γ deexcitation processes in the (n,γ)and (n,n′γ)reactions as well as the variation tendency of the reaction cross section ratios between the direct-semidirect radiative captures and the compound nucleus statistical processes with the incident energies, nuclear mass numbers and the nuclear shells. The numerical calculations and the comparisons with the experimental values for 181Ta,Au and 208Pb have been done in the nentron incident energy region from 1 MeV to 20MeV. The analyses and discussions to the results have also been given.

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