SCATTERING OF PROTONS OF C$sup 12$ IN THE ENERGY RANGE OF 5-6 Mev
Thesis/Dissertation
·
OSTI ID:4726401
Three resonances were observed in the bombarding energy range 5 to 6 Mev. At 5.38 Mev bombarding energy, which corresponds to 6.91 Mev excitation energy in N/sup 13/, the resonance has j/sup e (as Fe/sup 59 / = 3/2/sup +/ (D/sub 3/2/). Its total width in the laboratory is 125 450 deg C in a 5 kev. At 5.68 Mev bombarding energy, which corresponds to 7.19 Mev excitation energy in N/sup 13/, the resonance has very probably, but not certainly, j/sup e (as Fe/sup 59 / = 7/ 2/sup +/ (G7/2). Its total width in the laboratory system is 10 450 deg C in a .5 kev. At 5.90 Mev bombarding energy, which corresponds to 7.40 excitation energy in N/sup 13/, the resonance has j/sup e (as Fe/sup 59 / = 5/2/sup -/ (F5/ 2). Its total width in the laboratory system is 75 450 deg C in a 5 kev. The intermediate-coupling shell-model calculations for an A = 13 nucleus require a 7/ 2/sup +/ state of excitation energy of st run. Concent 7.5 Mev and a 5/2/sup -/ state at excitation energy of 4 to 5 Mev. We have identified a state at 7.19 Mev that has all the properties consistent with a spin-parity assignment of 7/2/ sup +/. Therefore the existence of the 7/2/sup +/ state as calculated theoretically should be considered verified experimentally with a high degree of probability. In contrast, the 5/2/sup -/ assignment for the 7.40 Mev state is certain. However, its energy is quite high when compared with the energy that is predicted for it. This would indicate that the choice of L/K = 6.8 that was made has to be changed to get an agreement between experiment and calculation. Finally, it has been found that the p'- gamma angular correlations of energies around the 5.90 Mev (bombarding energy) show asymmetry around 90 un. Concent 85% cm. Two possible causes were investigated: interference between states, and direct interaction. Analysis showed that the direct interaction is almost certainly the cause of observed asymmetries. (M.P.G.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-17-022662
- OSTI ID:
- 4726401
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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