Systematics Formulae of Thermal Neutron Fission Cross Sections

WU Hai-cheng; WANG Ji-min; ZHANG Jing-shang; HUANG Xiao-long; DUAN Jun-feng

doi:10.7538/yzk.2015.49.01.0001

Atomic Energy Science and Technology > 2015 > 49(1): 1-5. > DOI: 10.7538/yzk.2015.49.01.0001

WU Hai-cheng, WANG Ji-min, ZHANG Jing-shang, HUANG Xiao-long, DUAN Jun-feng. Systematics Formulae of Thermal Neutron Fission Cross Sections[J]. Atomic Energy Science and Technology, 2015, 49(1): 1-5. DOI: 10.7538/yzk.2015.49.01.0001

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Systematics Formulae of Thermal Neutron Fission Cross Sections

China Institute of Atomic Energy, P. O. Box 275-41, Beijing 102413, China

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Abstract

To develop the evaluation methods for some nuclides whose measured data are scant, the systematics formulae of thermal neutron fission cross sections were established based on the fission theory. On the basis of the recommended thermal neutron fission cross sections and the height of the fission barrier, the correlations between thermal neutron fission cross sections and excitation energy of saddle point were studied. The parameters of every nuclide with different Z were obtained by fitting. Then, the systematic behaviors of these parameters with Z were studied, and the parity relations were found. The overall systematic formulae of thermal neutron fission cross sections were established by fitting. The results indicate that there are correlations between thermal neutron fission cross sections and Z.
- thermal energy neutron,
- fission cross section,
- systematics

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