CROSS SECTIONS FOR THE Ni$sup 58$$($$alpha$,p), Ni$sup 58$$($$alpha$$,$$gamma$), AND Co$sup 59$$($$alpha$,n) REACTIONS
Thick-target yields were measured for the Ni/sup 58/( alpha , gamma ) reaction from 4.9 to 6.1 Mev, the Ni/sup 58/( alpha ,p) reaction from 4.9 to 11 Mev, and the Co/sup 59/( alpha ,n) reaction from 5.8 to 10 Mev. The reactions were identified by measuring the coincident annihilation radiation from the induced BETA /sup +/ activities. The absolute thick-target position yields, which were measured at approximately 100-kev energy intervals, have an accuracy of plus or minus 6%. The reaction cross sections were obtained to an accuracy of 15 to 20% by the differentiation of the smooth thick-target yield curves. Over the measured energy range, the cross sections increase from 1 to 12 mu b for the Ni/sup 58( alpha , gamma ) reaction, 0.6 mu b to 316 mb for the Ni/sup 58/( alpha , p) reaction, and 0.06 to 228 mb for the Co/sup 59/ ( alpha ,n) reaction. The total reaction cross scction for Ni/sup 58/ is compared to some values predicted by optical models. The Co/sup 59/( alpha ,n) yields are compared 10 those obtained by measuring the neutrons directly with the graphite sphere detector. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- NSA Number:
- NSA-18-009411
- OSTI ID:
- 4087661
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Vol. Vol: 133; Other Information: Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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