(p,/cap alpha/) REACTIONS IN Li$sup 7$, Be$sup 9$, AND C$sup 12$ AT 15.0- 18.6 Mev
Angular distributions of alpha particles from the gies of 15.0 and 18.6 Mev, and Be/sup 9/(p, alpha )Li/sup 6/ and C/sup 12/(p, alpha )B/s up 9/ angular distributions were each measured at 15.6 and 18.6 Mev. Absolute cross sections were measured for all of the reactions. The main features of the Li/sup 7/(p, alpha )He/sup 4/ angular distributions, which are symmetric about 90 deg, can be reproduced by the appropriately symmetrized triton pickup theory. The Be/sup 9/ (p, alpha )Li/sup 6/ ground state and Be/sup 9/(p alpha )Li/sup 6*/ (2.2 Mev) reactions exhibit backward peaking which suggests a possible contribution from heavy particle stripping. The C/sup 12/(p, alpha )B/sup 9/ angular distributions are oscillatory but cannot be fitted satisfactorily using the plane wave triton pickup or knock-on theories. The oscillations in the Li/sup 7/(p, alpha )He/sup 4/ and C/sup 12/(p, alpha )B/sup 9/ angular distributions do not shift in angle as the bombarding energy is changed, so that the value used for the interaction radius must be decreased as the proton energy is raised. None of the angular distributions are strongly energy dependent, and all of the cross sections decrease with increasing bombarding energy. (auth)
- Research Organization:
- Princeton Univ., N.J.
- NSA Number:
- NSA-17-000859
- OSTI ID:
- 4779150
- Report Number(s):
- PUC-1962-70; 0031-899X
- 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- Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 128; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
/sup 6/Li(n,d)/sup 5/He and /sup 7/Li(n,d)/sup 6/He with 56. 3 MeV neutrons
A STUDY OF THE Be$sup 9$(p,$alpha$)Li$sup 6$ REACTION FROM 3.5 TO 12.5 Mev