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Effects of ion beam irradiation on self-trapped defects in single-crystal Lu<inf>2</inf>SiO<inf>5</inf>

Jacobsohn, LG and Lee, JK and Bennett, BL and Muenchausen, RE and Nastasi, M and Cooke, DW (2007) Effects of ion beam irradiation on self-trapped defects in single-crystal Lu<inf>2</inf>SiO<inf>5</inf>. Journal of Luminescence, 124 (1). 5 - 9. ISSN 0022-2313

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Abstract

Ion irradiation effects on emission bands related to self-trapped defects in Czochralski-grown Lu2SiO5 (LSO) crystals has been investigated. Irradiation was carried out using 53 keV He+ and 40 keV H+ beams with doses of 1 and 2×1016 atoms/cm2, respectively, at room temperature. Post-irradiation radioluminescence measurements were carried out in the 5-300 K temperature range using Mo-target X-ray excitation. Two emission bands were observed at 256 and 315 nm and assigned to self-trapped excitons (STE) and self-trapped holes (STH), respectively. The intensity of the bands was determined by the ballistic damage induced by irradiation, and no effects due to the chemical nature of implanted species were observed. Thermal-quenching activation energies of these defects as a function of irradiation conditions were extracted by applying the Mott-Seitz two-level model. Each band presents strikingly different behavior following irradiation; activation energy of the STH increases two-fold whereas the STE decreases three-fold. The results indicate a major role of surface effects on the radioluminescence of LSO. For comparative purposes, irradiated Lu2O3 was also investigated. © 2006 Elsevier B.V. All rights reserved.


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Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Jacobsohn, LG
Lee, JKjul37@pitt.eduJUL370000-0002-7778-7679
Bennett, BL
Muenchausen, RE
Nastasi, M
Cooke, DW
Centers: Other Centers, Institutes, or Units > Petersen Institute of NanoScience and Engineering
Date: 1 May 2007
Date Type: Publication
Journal or Publication Title: Journal of Luminescence
Volume: 124
Number: 1
Page Range: 5 - 9
DOI or Unique Handle: 10.1016/j.jlumin.2006.01.357
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
ISSN: 0022-2313
Other ID: 10.1016/j.jlumin.2006.01.357
Date Deposited: 05 Nov 2014 20:46
Last Modified: 05 Feb 2019 19:55
URI: http://d-scholarship.pitt.edu/id/eprint/23458

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