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Chinese Physics C> 1996, Vol. 20> Issue(6) : 563-570 

Study on Photon Transmission Coefficient and Capture Cross Section of Isomeric State

  •  Department of Physics,Zhengzhou Univesity,Zhengzhou 4500522 China Institute of Atomic Energy,Beijing 102413

  • The formulas for calculating the photon transmission coefficient and the capture cross section of the isomeric state for the compound nucleus reaction are presented,in which statistical and non-statistical processes are all contained.Calculating the photon transmission coefficient by solving the cascade deexcitation processes,the (n,γn)processes are deducted reasonably,and the contribution of the first transitions to the levels distributed above the neutron separating energy Bn can be included.The numerical calculations for 59Co and 103Rh in the energy below 4MeV are made.The different calculation methods for the photon transmission coefficients are compared with other and the calculation results of the isomeric capture cross sections are compared with the experimental data.Analysis and discusions,especially the dependence of calculated results on energy level distributions are presented.
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    [1] A.M.Lane,J.E.Lynn,Nucl.Phys.,11（1959）646.[2]G.EBrown,Nucl.Phys.,57（1964）339.[3]C.F.Clement,Nucl.Phys.,66（1965）273.[4]马中玉等，原子核物理，3（1981）217.[5]P.Oblozinsky,Phys.Rev.,C2（1987）407.[6]P.Oblozinsky,Phys.Rev.,C4（1990）1652.[7]B.J.Allen et al.,Advances in Nucl.Phys.,10（1978）129.[8]Y.K.Ho et al.,Nucl.Phys.,A406（1983）1.[9]刘建峰等，高能物理与核物理，3（1983）355.[10]霍裕昆等，高能物理与核物理，5（1989）465.[11]刘建峰等，高能物理与核物理，4（1991）349.[12]J.Kopecky et al.,Phys.Rev.,C5（1990）1941.[13]齐辉等，原子核物理，1（1981）1.[14]R.E.Chrin,Neutron Radiative Capture,Pergamon Press,（1984）p64.[15]苏宗涤等，高能物理与核物理，3（1979）80.[16]F.D.Becchetti et al.,Phys.Rev.,182（1969）1190.[17]A.Gilbert et al.,Can.J.Phys.,43（1965）1446.[18]S.S.Dietrich et al.,Atomic Data and Nuclear Data Tables,38（1988）199.[19]P.Andersson et al.,Nuclear data sheets,39（1983）641.[20]P.Andersson et al.,Nuclear data sheets,48（1986）251.[21]D.DeFrenne et al.,Nuclear data sheets,45（1985）363.[22]B.Blachot et al.,Nuclear data sheets,41（1984）325.[23]Victoria Mclane et al.,Nuclear Cross Section curves,National Nuclear Data Center,Brookhaven National Laboratory Upton,New York.

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Liu Jianfeng and Su Zongdi. Study on Photon Transmission Coefficient and Capture Cross Section of Isomeric State[J]. Chinese Physics C, 1996, 20(6): 563-570.
Liu Jianfeng and Su Zongdi. Study on Photon Transmission Coefficient and Capture Cross Section of Isomeric State[J]. Chinese Physics C, 1996, 20(6): 563-570. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Study on Photon Transmission Coefficient and Capture Cross Section of Isomeric State

    Corresponding author: Liu Jianfeng,
  • Department of Physics,Zhengzhou Univesity,Zhengzhou 4500522 China Institute of Atomic Energy,Beijing 102413
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 1996-06-05

Abstract: The formulas for calculating the photon transmission coefficient and the capture cross section of the isomeric state for the compound nucleus reaction are presented,in which statistical and non-statistical processes are all contained.Calculating the photon transmission coefficient by solving the cascade deexcitation processes,the (n,γn)processes are deducted reasonably,and the contribution of the first transitions to the levels distributed above the neutron separating energy Bn can be included.The numerical calculations for 59Co and 103Rh in the energy below 4MeV are made.The different calculation methods for the photon transmission coefficients are compared with other and the calculation results of the isomeric capture cross sections are compared with the experimental data.Analysis and discusions,especially the dependence of calculated results on energy level distributions are presented.

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