ANGULAR DISTRIBUTIONS OF THE REACTIONS Co$sup 59$(p,/cap alpha/)Fe$sup 56$ AT 7.7 /approximately equals/ 14.1 MEV AND Mn$sup 55$(p,/cap alpha/Cr$sup 52$ AT 7.6 /approximately equals/ 12.9 MEV
The angular distributions of the reactions Co/sup 59/(p, alpha )Fe/sup 56/ and Mn/sup 55/(p, alpha )Cr/sup 52/ resulting in the ground and first excited states of the residual nuclei were measured at 7.7, 8.7, 10.7, l1.8, and 12.9 Mev of the incident proton energy, respectively, making use of proportional counters. Similar behavior was obtained for these four reactions. For the reaction Co/sup 59/(p, alpha )Fe/sup 56/ the forward peak in the angular distribution is prominent at 14.1 and 13.1 Mev and disappears gradually with decreasing proton energy, and the angular distribution is approximately 90 deg symmetrical below about 11 Mev. For the reaction Mm/sup 55/(p, alpha )Cr/sup 52/ the angular distribution is considerably forward peaked at l2.9 and 11.8 Mev and is approximately 90 deg symmetrical below about 10 Mev. It was found that the total cross section integrated from the angular distributions for both reactions decrease smoothly with increasing proton energy. It is considered that the reactions Co/sup 59/(p alpha )Fe/sup 56/ d states of the residual nuclei occur through the similar reaction process, that is, in the lower energy region the compound nucleus process plays a predominant role, although some contribution from the direct interaction process cannot be neglected, and the contribution from the direct interaction process becomes gradually significant with increasing proton energy and is predominant above about 11 Mev. (auth)
- Research Organization:
- Kyoto Univ.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-002181
- OSTI ID:
- 4129005
- Journal Information:
- J. Phys. Soc. Japan, Vol. Vol: 15; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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