Nano-scale radiation effects in wide-gap crystals under irradiation by VUV photons
(2002) In Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms 191(1-4). p.135-143- Abstract
- The creation spectra of F centres by synchrotron radiation of 5-35 eV have been measured for Na6Al6Si6O24(NaI)(2x) and Na6Al6Si6O24(NaBr)(2x) optical ceramics at 8 and 80 K. The exciting photons cause the excitation and ionization of halogen ions (6-8 eV) and of an aluminosilicate carcass (8.5-31 eV) or the excitation of Na+ ions (32-35 eV). An exciting photon of 20-26 and 27-31 eV creates two or three electron-hole pairs, respectively. Besides the electron-hole creation mechanism of F centres with the participation of pre-irradiation defects, the basic interstitial-vacancy creation mechanism of Frenkel defect pairs is realized in socialites at high doses of irradiation at 300 K. A Br-0 atom formed at the irradiation in a regular beta-cage... (More)
- The creation spectra of F centres by synchrotron radiation of 5-35 eV have been measured for Na6Al6Si6O24(NaI)(2x) and Na6Al6Si6O24(NaBr)(2x) optical ceramics at 8 and 80 K. The exciting photons cause the excitation and ionization of halogen ions (6-8 eV) and of an aluminosilicate carcass (8.5-31 eV) or the excitation of Na+ ions (32-35 eV). An exciting photon of 20-26 and 27-31 eV creates two or three electron-hole pairs, respectively. Besides the electron-hole creation mechanism of F centres with the participation of pre-irradiation defects, the basic interstitial-vacancy creation mechanism of Frenkel defect pairs is realized in socialites at high doses of irradiation at 300 K. A Br-0 atom formed at the irradiation in a regular beta-cage can penetrate into a neighbouring cage. As a result, an F centre and a Br-2(-) molecule (H centre) are formed and the interdefect distance in this pair is about I nm. The efficiency of F-H pair creation is especially high under the conditions of multiplication of electron-hole pairs. In contrast to alkali halides the crowdion configuration of interstitials does not exist in sodalites and F-H pairs are stable up to 450 K. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/333636
- author
- Lushchik, A ; Kirm, M ; Lushchik, C ; Martinson, Indrek LU ; Nagirnyi, V and Vasil'chenko, E
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- multiplication of excitations, sodalites, pairs of Frenkel defects, alkali halides
- in
- Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
- volume
- 191
- issue
- 1-4
- pages
- 135 - 143
- publisher
- Elsevier
- external identifiers
-
- wos:000176692300025
- scopus:0036574478
- ISSN
- 0168-583X
- DOI
- 10.1016/S0168-583X(02)00531-1
- language
- English
- LU publication?
- yes
- id
- b6f086fd-c447-47e1-be75-8395f54b2c4a (old id 333636)
- date added to LUP
- 2016-04-01 15:35:51
- date last changed
- 2022-01-28 06:05:41
@article{b6f086fd-c447-47e1-be75-8395f54b2c4a,
abstract = {{The creation spectra of F centres by synchrotron radiation of 5-35 eV have been measured for Na6Al6Si6O24(NaI)(2x) and Na6Al6Si6O24(NaBr)(2x) optical ceramics at 8 and 80 K. The exciting photons cause the excitation and ionization of halogen ions (6-8 eV) and of an aluminosilicate carcass (8.5-31 eV) or the excitation of Na+ ions (32-35 eV). An exciting photon of 20-26 and 27-31 eV creates two or three electron-hole pairs, respectively. Besides the electron-hole creation mechanism of F centres with the participation of pre-irradiation defects, the basic interstitial-vacancy creation mechanism of Frenkel defect pairs is realized in socialites at high doses of irradiation at 300 K. A Br-0 atom formed at the irradiation in a regular beta-cage can penetrate into a neighbouring cage. As a result, an F centre and a Br-2(-) molecule (H centre) are formed and the interdefect distance in this pair is about I nm. The efficiency of F-H pair creation is especially high under the conditions of multiplication of electron-hole pairs. In contrast to alkali halides the crowdion configuration of interstitials does not exist in sodalites and F-H pairs are stable up to 450 K.}},
author = {{Lushchik, A and Kirm, M and Lushchik, C and Martinson, Indrek and Nagirnyi, V and Vasil'chenko, E}},
issn = {{0168-583X}},
keywords = {{multiplication of excitations; sodalites; pairs of Frenkel defects; alkali halides}},
language = {{eng}},
number = {{1-4}},
pages = {{135--143}},
publisher = {{Elsevier}},
series = {{Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms}},
title = {{Nano-scale radiation effects in wide-gap crystals under irradiation by VUV photons}},
url = {{http://dx.doi.org/10.1016/S0168-583X(02)00531-1}},
doi = {{10.1016/S0168-583X(02)00531-1}},
volume = {{191}},
year = {{2002}},
}