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

Liu Jianfeng; Su Zongdi

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

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

Liu Jianfeng ^, ,
Su Zongdi

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

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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 B_n 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.

References

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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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沈阳化工大学材料科学与工程学院沈阳 110142

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

Liu Jianfeng ^,
Su Zongdi

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 B_n 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.