THE INVERSE REACTIONS B$sup 11$(p,$gamma$)C$sup 12$ AND C$sup 12$$($$gamma$,p)B$sup 1$$sup 1$
Journal Article
·
· Soc. Sci. Fennica, Commentationes Phys. Math'
OSTI ID:4305321
In order to obtain a conception of the common compound channels for the inverse reactions B/sup 11/(p, )C/sup 12/ and C/sup 12/( ,p )B/sup 11/ the cross section for the pure inverted process to the reaction B/sup 11/(p, )C/ sup 12/ was calculated according to the reciprocity theorem, i.e., for the distribution relating to orbital angular momenta of the protons that have occurred in B/sup 11/(p, )C/sup 12/ experiments, which distribution is unknown but can be considered, for equal energy, to be equal on the whole in all these experiments. The cross section obtained in this manner was compared in the common energy range of about 2 Mev with the experimentally found cross section for the C/sup 12/ ( ,p)B/sup 11/ reaction. It appears as that common channels comprised a considerable part of the experimental B/sup 11/(p, )C/sup 12/ process but only a small part of the experimental C/sup 12/( p)B/sup 11/ process. This is clearly connected with the unusually ample proton yield which was obtained of the reaction in the vicinity of the >>giant resonance>> peak and which is considered to be due to the fact that quanta frequently react with single protons in the C/sup 12/ nucleus instead of with the entire nucleus. The previously stated spin and parity 2/sup +/ for the 16.10, 15.3 and 19.2 Mev levels, and 1/sup -/ for the 17.22 Mev level of C/sup 12/ are compatible with both inverse processes, but there is probably at least one further 1/sup -/ level among the recently discovered levels of comparatively high energy or among yet undiscovered resonance levels. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-12-006887
- OSTI ID:
- 4305321
- Journal Information:
- Soc. Sci. Fennica, Commentationes Phys. Math', Journal Name: Soc. Sci. Fennica, Commentationes Phys. Math' Vol. Vol: 22, No. 3
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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