dc.contributor.advisor Dunning, F. B. Magugumela, Maurice Todani 2009-06-04T00:33:22Z 2009-06-04T00:33:22Z 1994 https://hdl.handle.net/1911/13864 A spin-polarized low-energy electron gun with high current transmission is described here and has been applied to SPEELS studies. Current transmission in excess of 40% is routinely achieved. This is a dramatic improvement compared with the $\sim$1% transmission obtained using an earlier electron gun. The high current transmission has allowed SPEELS studies of energy loss mechanisms in low-energy electron scattering from atomically clean metallic surfaces. There are two dominant energy loss mechanisms: dipole scattering which occurs in the vacuum outside the target and impact scattering via electron-hole pair excitation occurring inside the target surface. Preliminary results of SPEELS experiments on Cu(100) and Ag(100) surfaces and on thin films of Mo, Co, and Fe epitaxially grown on a Cu(100) are presented. 81 p. application/pdf eng Condensed matter physics Design and testing of a low-energy spin-polarized electron gun and its application to SPEELS Thesis Text Physics Natural Sciences Rice University Masters Master of Arts Magugumela, Maurice Todani. "Design and testing of a low-energy spin-polarized electron gun and its application to SPEELS." (1994) Master’s Thesis, Rice University. https://hdl.handle.net/1911/13864.
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