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Vacuum ultraviolet luminescence excitation spectra of {alpha}-Al{sub 2}O{sub 3} single crystals

Technical Report:

Abstract

The luminescence excitation spectra of corundum single crystals irradiated with 50 MeV electrons were studied. In the region of fundamental absorption there appeared excitation bands (blue and ultraviolet) which correlated well with optical absorption bands of the F{sup +}-centre in the absorption (reflection) spectra. The excitonic peaks observed in the excitation spectra of red luminescence were explained by the charge energy transfer by Cr{sup 2+}, Cr{sup 4+} ions at excitonic excitation. At {Dirac_h}{nu} > 9.5 eV there appeared sharp drops which were interpreted as nonirradiative near-surface recombinations. 8 refs.; 3 figs.
Publication Date:
Dec 31, 1990
Product Type:
Technical Report
Report Number:
YERPHI-1278-64-90
Reference Number:
SCA: 665300; PA: AIX-23:018410; SN: 92000662020
Resource Relation:
Other Information: PBD: 1990
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM OXIDES; LUMINESCENCE; ULTRAVIOLET SPECTRA; CORUNDUM; ABSORPTION SPECTRA; ELECTRON BEAMS; EXCITATION; MEV RANGE 10-100; MONOCRYSTALS; PHYSICAL RADIATION EFFECTS; SYNCHROTRON RADIATION; 665300; INTERACTIONS BETWEEN BEAMS AND CONDENSED MATTER
OSTI ID:
10118645
Research Organizations:
Erevanskij Fizicheskij Inst., Erevan (Armenia)
Country of Origin:
USSR
Language:
English
Other Identifying Numbers:
Other: ON: DE92617510; TRN: SU9109367018410
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
10 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Harutunyan, V V, Gevorkyan, V A, and Grigoryan, N E. Vacuum ultraviolet luminescence excitation spectra of {alpha}-Al{sub 2}O{sub 3} single crystals. USSR: N. p., 1990. Web.
Harutunyan, V V, Gevorkyan, V A, & Grigoryan, N E. Vacuum ultraviolet luminescence excitation spectra of {alpha}-Al{sub 2}O{sub 3} single crystals. USSR.
Harutunyan, V V, Gevorkyan, V A, and Grigoryan, N E. 1990. "Vacuum ultraviolet luminescence excitation spectra of {alpha}-Al{sub 2}O{sub 3} single crystals." USSR.
@misc{etde_10118645,
title = {Vacuum ultraviolet luminescence excitation spectra of {alpha}-Al{sub 2}O{sub 3} single crystals}
author = {Harutunyan, V V, Gevorkyan, V A, and Grigoryan, N E}
abstractNote = {The luminescence excitation spectra of corundum single crystals irradiated with 50 MeV electrons were studied. In the region of fundamental absorption there appeared excitation bands (blue and ultraviolet) which correlated well with optical absorption bands of the F{sup +}-centre in the absorption (reflection) spectra. The excitonic peaks observed in the excitation spectra of red luminescence were explained by the charge energy transfer by Cr{sup 2+}, Cr{sup 4+} ions at excitonic excitation. At {Dirac_h}{nu} > 9.5 eV there appeared sharp drops which were interpreted as nonirradiative near-surface recombinations. 8 refs.; 3 figs.}
place = {USSR}
year = {1990}
month = {Dec}
}