Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Observation of Fe-related defects in neutron irradiated semi-insulating InP
Autore:
Mari, B; Hernandez-Fenollosa, MA; Navarro, FJ;
Indirizzi:
Univ Politecn Valencia, Dept Fis Aplicada, E-46071 Valencia, Spain Univ Politecn Valencia Valencia Spain E-46071 a, E-46071 Valencia, Spain
Titolo Testata:
JOURNAL OF APPLIED PHYSICS
fascicolo: 12, volume: 89, anno: 2001,
pagine: 7772 - 7776
SICI:
0021-8979(20010615)89:12<7772:OOFDIN>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON LIFETIME SPECTRA; TRANSMUTATION-DOPED-INP; INTERSTITIAL IRON; INDIUM-PHOSPHIDE; SILICON; PROGRAM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Mari, B Univ Politecn Valencia, Dept Fis Aplicada, Cami Vera S-N, E-46071 Valencia, Spain Univ Politecn Valencia Cami Vera S-N Valencia Spain E-46071 Spain
Citazione:
B. Mari et al., "Observation of Fe-related defects in neutron irradiated semi-insulating InP", J APPL PHYS, 89(12), 2001, pp. 7772-7776

Abstract

Optical absorption and positron lifetime measurements have been performed on Fe-doped semi-insulating InP single crystals irradiated with thermal neutrons in a wide dose range from 0.1 to 2.7 x 10(17) n cm(-2). Two lifetimeswere found: tau (1) = 210 ps is constant in all the irradiation range; andtau (2) = 340 ps reaches an intensity of almost 40% at the higher fluence used. When comparing these results with those obtained on unintentionally doped InP, a large increase of the longest lifetime is observed, from 300 psin the nondoped InP to 340 ps in the semi-insulating InP. The increase of the second lifetime in InP:Fe means that the positron traps are less attractive to positrons. These positron traps have been associated to a complex defect generated by the main neutron-originated defect, the indium vacancy, and the clusters or interstitial atoms of Fe. The optical absorption spectra show a background absorption related to Fe precipitates in as-grown InP:Fe. This background absorption disappears after neutron irradiation, suggesting the destruction of Fe precipitates by the energetic particles generatedin the transmutation process of In-115. (C) 2001 American Institute of Physics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 12:45:02