Autor 
Sunta, C. M.
Ayta, WEF Kulkarni, R. N. Piters, T. M. Watanabe, S. 
Instituição  ATOM ENERGY REGULATORY BOARD SONOMA STATE UNIV Universidade Federal de São Paulo (UNIFESP) 
Resumo  Thermoluminescence glow peaks are calculated numerically for a onetraponerecombinationcentre model using a generalized approach. Except in extreme cases the peaks are seen to change in position and shape with a change in dose. These glow peaks are fitted to the generalorder kinetics model and the values of the kinetic parameters, namely the activation energy, preexponential factor and order of kinetics are determined by finding the best fit. in this way an attempt is made to correlate the empirical parameters with the physically meaningful ones in the framework of the adopted model. the fitted value of the activation energy matches reasonably its input value used in the generalized approach model calculations. the fitted values of the order of kinetics and the preexponential factor parameters change with the initial occupancy of the traps (dose) in all cases in which the order of kinetics (KO) is found to be in the range in which 1 < KO < 2. the KO decreases with increasing trap occupancy whereas the preexponential factor increases. the latter parameter undergoes a change also in its units. It is observed that, when the found value of the KO is such that 1 < KO < 2, the best fitted generalorder kinetics peak deviates significantly from the computed peak. A better fit is found with two peaks, one of which is approximately of first order and the other approximately of second order. the KO parameter at saturation dose has been correlated with the ratio of the retrapping and recombination cross sections. These theoretical results are discussed in the perspective of experimental observations in general. Plausible reasons for disagreements between theory and experiment are also discussed. 
Idioma  Inglês 
Data  19970421 
Publicado em  Journal of Physics Dapplied Physics. Bristol: Iop Publishing Ltd, v. 30, n. 8, p. 12341242, 1997. 
ISSN  00223727 (Sherpa/Romeo, fator de impacto) 
Editor  Iop Publishing Ltd 
Extensão  12341242 
Fonte 

Direito de acesso  Acesso restrito 
Tipo  Artigo 
Web of Science  WOS:A1997WW48100013 
URI  http://repositorio.unifesp.br/handle/11600/25716 
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