ANNIHILATION OF DELOCALIZED POSITRONS - A COMPARISON OF DIAMOND AND SILICON

Authors
SCHMIDT WG VERWOERD WS
Citation
Wg. Schmidt et Ws. Verwoerd, ANNIHILATION OF DELOCALIZED POSITRONS - A COMPARISON OF DIAMOND AND SILICON, Physics letters. A, 222(4), 1996, pp. 275-280
Citations number
26
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
222
Issue
4
Year of publication
1996
Pages
275 - 280
Database
ISI
SICI code
0375-9601(1996)222:4<275:AODP-A>2.0.ZU;2-I
Abstract
We present ab initio pseudopotential calculations on the lifetime and electron-positron momentum density of delocalized positrons in bulk di amond and silicon. Our results compare very well with experimental and earlier theoretical findings available. For diamond we observe a comp aratively isotropic momentum distribution with maximum density at the Gamma point which explains naturally recent experimental results.