Title

Three-Dimensional Electron-Positron Momentum Distribution of O3+-Irradiated 6H Sic Using Two Positron Spectroscopy Techniques Simultaneously

Document Type

Article

Publication Date

2011

Abstract

A three-dimensional (3D) positron annihilation spectroscopy system (3DPASS) capable of determining 3D electron-positron (e-e+ ) momentum densities from measurements of deviations from co-linearity and energies of photons from e-e+ annihilation events was employed to examine the effects of O-atom defects in 6H SiC. Three-dimensional momentum datasets were determined for 6H SiC irradiated with 24 MeV O3+ ions. Angular correlation of annihilation radiation (ACAR) and coincidence Doppler-broadening of annihilation radiation (CDBAR) analyses are presented. In addition, a novel technique is illustrated for analyzing 3D momentum datasets in which the parallel momentum component, p|| (obtained from the CDBAR measurement) is selected for annihilation events that possess a particular perpendicular momentum component, p- observed in the 2D ACAR spectrum.
Abstract © IOP

Comments

The 'Link to Full Text' button on this record points to the freely-accessible article, hosted at the publisher website. The article is marked open access to read ("Green Open Access"). The publisher retains permissions to re-use and distribute this article.

From a paper presented at: 12th International Workshop on Slow Positron Beam Techniques (SLOPOS12) 1–6 August 2010, Magnetic Island, North Queensland, Australia

DOI

10.1088/1742-6596/262/1/012064

Source Publication

Journal of Physics: Conference Series

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