Cross section calculations for neutron monitor reactions of {sup 197}Au in energy region up to 80 MeV
Conference
·
OSTI ID:62081
- China Institute of Atomic Energy, Beijing (China)
A set of neutron optical potential parameters for {sup 197}Au in energies of 0.5-80 MeV was obtained with available experimental data. In higher energy region the calculated total cross sections have good fitting with the experimental data and the calculated nonelastic scattering cross sections arc closed to the measured values of {sup 208}Pb; in lower energy region the calculated (n,2n), (n,3n), and (n,4n) cross sections have also good fitting with the experimental data. Therefore, the predicted neutron monitor reaction (n,2n), (n,3n), and (n,4n) cross sections in higher energy region are reasonable and reliable. The need for a consistent set of evaluated neutron cross section data for standard and monitor reactions in the region above 20 MeV was stressed especially. The activation monitor reaction cross sections can be used as a reference standard for the measurements in high energy neutron fields. In the case of the neutron induced monitor reaction of {sup 197}Au, the active isotopes {sup 196}Au (half life is 6.18 day), {sup 195}Au (half life is 186.1 day), and {sup 194}Au (half life is 1.584 day) can be produced through (n,2n), (n,3n), and (n,4n) reactions, respectively. Some relative measurement data can be found in EXFOR data below 28 McV, but now no experimental data for 3 reaction channels mentioned above can be found above 28 MeV. In order to meet the needs of them, the calculation of cross sections of neutron monitor reactions on {sup 197}Au in energy region 0.5-80 McV were performed.
- OSTI ID:
- 62081
- Report Number(s):
- CONF-940507--Vol.2
- Country of Publication:
- United States
- Language:
- English
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