Elastic and inelastic cross-section and analyzing power (iT$\sb{11},$ T$\sb{20},$ T$\sb{21},$ and T$\sb{22})$ angular distribution data are reported for $\sp4He(\sp6\vec Li,\sp6Li)\ \alpha$ at E$\rm \sb{CM}$ 11.1 MeV, and also elastic cross-section data for the same reaction at E$\rm\sb{CM}$ 15.0 MeV. The angular range covered is from 10$\sp\circ$-160$\sp\circ$ c.m., and all analyzing powers reported have large magnitudes except for the elastic T$\sb{21}.$ Also reported are elastic and inelastic cross-section angular distributions for $\sp7Li(\alpha,\alpha)\ \sp7Li$ at E$\rm\sb{CM}$ 11.8 and 15.9 MeV, and an analyzing power excitation function for $\sp4He(\sp6\vec Li,\sp6Li)\ \alpha$ between E$\rm\sb{LAB}$ 25.7 and 29.8 MeV. / After discussing the physical setup of the FSU Optically Pumped Polarized Lithium Ion Source (OPPLIS), experimental data are reported documenting OPPLIS beam polarization optimization and the determination of $\sp7$Li Wien filter curves. Two theorems are advanced, proven and then utilized to perform calculations for the on-target calibration of the $\sp{6.7}$Li beam polarizations. Results of both optical model, finite range DWBA and channel coupling calculations are then presented, including an analysis of the $\sp6$Li bound state spectroscopic amplitude $b\sb{D}$ and coupling to several $\sp6$Li excited states. / The optical model analysis shows the need for an explicit spin orbit potential and the J-dependent potential term indicates the presence of channel coupling effects. The DWBA analysis confirms earlier predictions that the $\alpha$-exchange mechanism is important in $\sp6$Li + $\alpha$ scattering and is primarily important at the back-angles, as well as more recent predictions of a very small and negative $\sp6$Li $b\sb{D}.$ The coupled channels analysis explores the effects of cluster-folded central, spin-orbit and tensor potentials in a four channel calculation, these being the $\sp6$Li ground state, the 2.186 MeV 1st excited state, and the 2$\sp+$ and 1$\sp+$ resonances at 4.31 and 5.65 MeV, respectively. The 4-channel calculations confirm the optical model prediction that the forward angle iT$\sb{11}$ is extremely sensitive to channel coupling. Only the cluster-folded central and spin-orbit potentials are required along with channel coupling to give good agreement with the experimental data. / Source: Dissertation Abstracts International, Volume: 57-01, Section: B, page: 0428. / Major Professor: Kirby W. Kemper. / Thesis (Ph.D.)--The Florida State University, 1995.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_77649 |
| Contributors | Green, Peter V., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 154 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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