Dose Rate Effects on the Thermoluminescence Kinetics Properties of MWCVD Diamond Films

Dose rate effects are important in the thermoluminescencent (TL) dosimeter applications because a certain absorbed dose given at different dose rates may result in a different TL yeld. The present work reports about the dose rate effects on the TL glow curve and kinetics properties of microwave plasma assisted chemical vapor deposition (MWCVD) diamond films grown on (100) silicon. The diamond films were exposed to ¿ radiation at 20.67, 43.4 and 81.11 Gy min-1dose rates in the range of 0.05 ¿ 10 kGy. The films showed a linear dose behavior up to 2kGy and for higher dosesr.The TL intensity varied as a function of dose rate and the samples had a maximum TL response for lower dose rates. A single first order kinetics TL peak was typical for low doses and at higher doses two first order kinetics peaks were necessary to fit the glow curves. The results indicate that dose rate effects may be significant in dosimetric applications of MWCVD diamond.

GASTELUM S;  CRUZ-ZARAGOZA E;  FAVALLI Andrea;  CHERNOV V;  MELENDREZ R;  SOTO-PUEBLA D;  PEDROZA-MONTERO M;  BARBOZA-FLORES M; 

2007-11-23

WILEY-V C H VERLAG GMBH

JRC40757

0031-8965,   

http://www3.interscience.wiley.com/cgi-bin/abstract/115804709/ABSTRACT,    https://publications.jrc.ec.europa.eu/repository/handle/JRC40757,   

10.1002/pssa.200776315,