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Title: Positron Annihilation in Insulating Materials

Abstract

We describe positron results from a wide range of insulating materials. We have completed positron experiments on a range of zeolite-y samples, KDP crystals, alkali halides and laser damaged SiO{sub 2}. Present theoretical understanding of positron behavior in insulators is incomplete and our combined theoretical and experimental approach is aimed at developing a predictive understanding of positrons and positronium annihilation characteristics in insulators. Results from alkali halides and alkaline-earth halides show that positrons annihilate with only the halide ions, with no apparent contribution from the alkali or alkaline-earth cations. This contradicts the results of our existing theory for metals, which predicts roughly equal annihilation contributions from cation and anion. We also present result obtained using Munich positron microprobe on laser damaged SiO{sub 2} samples.

Authors:
;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15002526
Report Number(s):
UCRL-JC-149558
TRN: US0401915
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 3rd International Workshop on Positron Studies of Semiconductor Defects, Sendai (JP), 09/29/2002--10/04/2002; Other Information: PBD: 18 Oct 2002
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANNIHILATION; CATIONS; DEFECTS; HALIDES; HYDROXIDES; LASERS; POSITRONIUM; POSITRONS

Citation Formats

Asoka-Kumar, P, and Sterne, PA. Positron Annihilation in Insulating Materials. United States: N. p., 2002. Web.
Asoka-Kumar, P, & Sterne, PA. Positron Annihilation in Insulating Materials. United States.
Asoka-Kumar, P, and Sterne, PA. Fri . "Positron Annihilation in Insulating Materials". United States. https://www.osti.gov/servlets/purl/15002526.
@article{osti_15002526,
title = {Positron Annihilation in Insulating Materials},
author = {Asoka-Kumar, P and Sterne, PA},
abstractNote = {We describe positron results from a wide range of insulating materials. We have completed positron experiments on a range of zeolite-y samples, KDP crystals, alkali halides and laser damaged SiO{sub 2}. Present theoretical understanding of positron behavior in insulators is incomplete and our combined theoretical and experimental approach is aimed at developing a predictive understanding of positrons and positronium annihilation characteristics in insulators. Results from alkali halides and alkaline-earth halides show that positrons annihilate with only the halide ions, with no apparent contribution from the alkali or alkaline-earth cations. This contradicts the results of our existing theory for metals, which predicts roughly equal annihilation contributions from cation and anion. We also present result obtained using Munich positron microprobe on laser damaged SiO{sub 2} samples.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Oct 18 00:00:00 EDT 2002},
month = {Fri Oct 18 00:00:00 EDT 2002}
}

Conference:
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