Isomeric cross-section ratios for the formation of {sup 75}Ge{sup {ital m},{ital g}} in ({ital n},{ital p}), ({ital n},{alpha}), and ({ital n},2{ital n}) reactions from 6 to 15 MeV
- Institut fuer Nuklearchemie, Forschungszentrum Juelich GmbH, D-52425 Juelich (Germany)
The isomeric cross-section ratio {sigma}{sub {ital m}}/({sigma}{sub {ital m}}+{sigma}{sub {ital g}}) for the formation of {sup 75}Ge{sup {ital m},{ital g}} was measured in {sup 75}As({ital n},{ital p}), {sup 78}Se({ital n},{alpha}), and {sup 76}Ge({ital n},2{ital n}) processes in the neutron energy range of 6.3 to 14.7 MeV. Use was made of the activation technique in combination with high-resolution {gamma}-ray spectrometry. The ratio is relatively high ({gt}0.70) even at low incident particle energies and appears to increase only slightly with increasing energy. Statistical model calculations, taking into account precompound effects, were performed for the total reaction channel as well as for the isomer ratio. In either case, good agreement was obtained. For the investigated isomeric pair, no significant effect of reaction channels on the isomeric cross-section ratio was observed.
- OSTI ID:
- 122388
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 52; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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