DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/9161

Title: ON THE SULPHOXY RADICALS IN CASO4-DY, NA THERMOLUMINESCENT PHOSPHOR - ELECTRON-PARAMAGNETIC RESONANCE STUDIES
Authors: RAO, TKG
BHATT, BC
SRIVASTAVA, JK
NAMBI, KSV
Keywords: thermo-luminescence
single-crystals
calcium-sulfate
spin-resonance
mechanisms
dosimetry
Issue Date: 1993
Publisher: IOP PUBLISHING LTD
Citation: JOURNAL OF PHYSICS-CONDENSED MATTER, 5(12), 1791-1800
Abstract: The defect centres formed in the thermoluminescent phosphor CaSO4:Dy on additionally doping with Na+ (as a charge compensator) have been studied using the technique of electron paramagnetic resonance. The Na+ ion at the Ca2+ site is found to stabilize the observed SO4- radical. The distortion of the SO4- tetrahedron is not significant and is of a different nature from that previously reported. An important feature of the new SO4- centre is that it is characterized by an axial g-tensor with g(perpendicular-to) > g(parallel-to). The addition of Na+ to CaSO4:Dy increases the concentration of this defect centre. On the other hand, the addition of dysprosium is found to enhance the formation and stabilization of the observed SO3- centre in CaSO4. The paramagnetic and thermal properties of these defect centres are discussed in relation to the observed thermoluminescence in CaSO4:Dy,Na.
URI: http://dx.doi.org/10.1088/0953-8984/5/12/007
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9161
http://hdl.handle.net/10054/9161
ISSN: 0953-8984
Appears in Collections:Article

Files in This Item:

There are no files associated with this item.

View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback