Graduate Thesis Or Dissertation
 

Inelastic scattering of 17-MeV protons from ¹⁴N and ¹⁵N

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/76537537g

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  • An inelastic scattering experiment was done in which 17-MeV protons from the Oregon State University cyclotron were scattered from ¹⁴N and ¹⁵N gas targets. Angular distributions are shown for the ground, 6.32-, 7.56-, 8.31-, and 8.57 -MeV states and the 5.3- and 7.2-MeV unresolved doublets of ¹⁵N, and for the ground, 2.3-, 3.9-, 6.2-, 6.4-, and 7.0-MeV states and the 5-, 5.7-, 8-, and 8.5-MeV unresolved doublets of ¹⁴N. Reasonable fits to the data were obtained for the 6.32 -MeV ¹⁵N state and the 2.3- and 3.9-MeV ¹⁴N states using a microscopic potential in a coupled-channel calculation. The use of a tensor force improved the fits to both the 6.32-MeV ¹⁵N state and the 2.3-MeV ¹⁴N state. A weak-coupling model was considered in which excited ¹⁵N states are formed by coupling a p₁/₂ proton hole to excited states of ¹⁶O. The model adequately represents the 5.27- and 7.56-MeV ¹⁵N states as being formed from the 6.13-MeV ¹⁶O state, and the 5.30- and 7. 30 -MeV ¹⁵N states as being formed from the 7.12 -MeV ¹⁶O state. The 6.32-MeV ¹⁵N state does not seem to be related to the 6.92-MeV ¹⁶O state, but evidence was presented that the 9.16 -MeV ¹⁵N state is related by the weak-coupling model to the 6.92-MeV ¹⁶O state.
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