RADIATION-DAMAGE IN NEUTRON TRANSMUTATION DOPED-INP

Authors
MARI B NAVARRO FJ HERNANDEZ MA RIERA J
Citation
B. Mari et al., RADIATION-DAMAGE IN NEUTRON TRANSMUTATION DOPED-INP, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 120(1-4), 1996, pp. 240-243
Citations number
11
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
120
Issue
1-4
Year of publication
1996
Pages
240 - 243
Database
ISI
SICI code
0168-583X(1996)120:1-4<240:RINTD>2.0.ZU;2-B
Abstract
InP crystals irradiated at different thermal neutron fluences have bee n investigated by optical absorption and positron lifetime measurement s. Irradiation produces a shift of the absorption edge towards long wa velengths and the appearance of an absorption band centered at 1.24 eV . The absorption edge is fully recovered after annealing but the absor ption band remains. Positron lifetime spectra are analysed with two co mponents. The longer lifetime, tau(2) = 300 Ps, has an intensity that increases with the fluence and falls down after annealing. This compon ent has been associated to positrons trapped at In-monovacancy related defects. The absorption tail has been proposed to be due to optical t ransitions involving vacancies that act as accepters while the 1.24 eV band has been tentatively ascribed to anion antisites.