THE C$sup 13$(p,n)N$sup 13$ REACTION CROSS SECTION FROM THRESHOLD TO 13 MeV
The cross section for the C/sup 1//sup 3/(p,n)N/sup 1//sup 3/ reaction is measured at 0 deg from threshold to 13.1 Mev and at 90 deg from threshold to 5.3 Mev. Resonances are observed, some of which can be attributed to known states in N/sup 1//sup 4/. No indication is found of a neutron group leading to the first excited state in N/sup 1//sup 3/, but above 8 Mev there is evidence for neutrons leading to the second or third excited state. In the energy range between threshold and 13 Mev fifty angular distributions of the neutrons leading to the ground state of N/sup 1//sup 3/ are determined. The angular distributions are similar in shape over energy intervals of two or three Mev. At the end of an interval the angular distributions change character quite suddenly. Over much of the energy range there is pronounced backward peaking with a secondary maximum near 50 deg and no forward peak. Above 11.4 Mev the angular distributions are in qualitative agreement with a simple direct interaction calculation. The differential cross sections are integrated to give the total cross section for the reaction. (auth)
- Research Organization:
- Univ. of Wisconsin, Madison
- NSA Number:
- NSA-15-021555
- OSTI ID:
- 4062170
- Journal Information:
- Nuclear Phys., Journal Name: Nuclear Phys. Vol. Vol: 24
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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