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Radiation Protection Dosimetry Advance Access originally published online on April 27, 2006
Radiation Protection Dosimetry 2006 119(1-4):180-183; doi:10.1093/rpd/nci615
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Search for ionisation density effects in the radiation absorption stage in LiF:Mg,Ti

I. Nail1, Y. S. Horowitz1,*, L. Oster2, M. E. Brandan3, M. Rodríguez-Villafuerte3, A. E. Buenfil3, C. Ruiz-Trejo3, I. Gamboa-deBuen4, O. Ávila5, V. M. Tovar5, P. Olko6 and N. Ipe7

1 Physics Department, Ben Gurion University of the Negev, Beersheva 84105, Israel
2 Negev Academic College of Engineering, Beersheva 84100, Israel
3 Instituto de Física, UNAM, A.P. 20-364, 01000 DF, Mexico
4 Instituto de Ciencias Nucleares, A.P. 70-547, 04510 DF, Mexico
5 ININ, A.P. 10-18-1027, 11801 DF, Mexico
6 Institute of Nuclear Physics, UL. Radzikowskiego 153, 31-342 Krakow, Poland
7 3117 La Mesa Drive, San Carlos, CA 94070, USA

* Corresponding author: yigal{at}bgumail.bgu.ac.il

Optical absorption (OA) dose–response of LiF:Mg,Ti (TLD-100) is studied as a function of electron energy (ionisation density) and irradiation dose. Contrary to the situation in thermoluminescence dose–response where the supralinearity is strongly energy-dependent, no dependence of the OA dose filling constants on energy is observed. This result is interpreted as indicating a lack of competitive process in the radiation absorption stage. The lack of an energy dependence of the dose filling constant also suggests that the charge carrier migration distances are sufficiently large to smear out the differences in the non-uniform distribution of ionisation events created by the impinging gamma/electron radiation of various energies.


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