TY  - JOUR
A1  - Itoh, N
A1  - Stoneham, D
A1  - Stoneham, AM
JF  - J PHYS-CONDENS MAT
PB  - IOP PUBLISHING LTD
VL  - 13
SP  - 2201 
N2  - We present a model of the predose effect of thermoluminescence in crystalline quartz in terms of known impurities and defect processes. It involves the recombination-induced dissociation of an aluminium-alkali complex [Al M+] and the reaction of an alkali [M+] with an activator [X], possibly Ge, to make the former an efficient electron trap [XM+]. This excitation-induced ionic process is a new feature, in addition to the simple carrier redistribution processes usually assumed, and is consistent with a number of experiments. The test dose detects [X M+], which is present in a concentration within the dynamic range of thermoluminescence measurements. Our model enables us to understand the enhanced sensitivity of the predose method, which has been widely used in archaeological and accident dosimetry, and to link it to established impurity and defect centres in alpha -quartz.
ID  - discovery124331
UR  - http://dx.doi.org/10.1088/0953-8984/13/10/314
Y1  - 2001/03/12/
KW  - OPTICALLY STIMULATED LUMINESCENCE
KW  -  RADIATION-INDUCED CONDUCTIVITY
KW  -  SINGLE IRRADIATION EXCITATION
KW  -  CRYSTALLINE SIO2
KW  -  QUARTZ CRYSTALS
KW  -  ELECTRODIFFUSED QUARTZ
KW  -  <SIO4/LI>0 CENTER
KW  -  NATURAL QUARTZ
KW  -  POINT-DEFECTS
KW  -  PEAK
N1  - Text made available to UCL Discovery by kind permission of IOP Publishing, 2012
IS  - 10
EP  -  2209
SN  - 0953-8984
TI  - The predose effect in thermoluminescent dosimetry
AV  - public
ER  -