The Elastic Scattering of Protons from Li⁶ Nuclei

Citation

McCray, James Arthur (1962) The Elastic Scattering of Protons from Li⁶ Nuclei. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/2E98-TW57. https://resolver.caltech.edu/CaltechTHESIS:08242011-160444604

Abstract

The differential elastic scattering cross section for protons from Li^6 nuclei has been measured for energies from 0.45 Mev to 2.9 Mev at six different angles. A measurement was also made of the Li^6(p,α)He^3 reaction cross section in order to determine its absolute value. The scattering data is consistent with an s- and p-wave phase shift analysis with a p-wave 5/2^- state at about E_p(Lab) = 1.84 Mev, with resonant parameters consistent with the parameters previously assigned to the corresponding mirror level in Li^7, and a very broad s-wave 1/2^+ state near or above E_p(Lab) = 2.76 Mev. The data is also consistent with a p-wave 3/2^- state with a different behavior of the s-wave scattering at higher energies, if an appropriate channel spin mixture is chosen. A p-wave 1/2^- state is not consistent with the data. No evidence for the existence of a 3/2^+ state near E_p(Lab) = 1 Mev with an appreciable Г_p/Г has been found. The stopping cross section for protons on lithium follows the Bloch formula from 0.8 Mev to 2.8 Mev.

Thesis Files