On the variation of order of kinetics during thermoluminescenee run

Abstract

In most of the thermoluminescence kinetics i t is assumed that the order of kinetics is a constant characteristic of the trap. I n a recent paper, Kathuria and Sunta have argued that the order of kinetics will vary with the availability of empty traps in the sample exposed t o the saturation dose. The authors have obtained results in favour of this argument from the isothermal decay curves. It is shown in the present paper, by analysing their results, that the variation they have observed is exaggerated and not in agreement with the glow curves.I n fast allen kinetischen Modellen der Thermolumineszenz wird angenommen, daD die Ordnung der Kinetik eine fur die Haftstelle charakteristische Konstante ist. I n einer neueren Arbeit haben Kathuria und Sunta vermutet, daD die Kinetik-Ordnung mit dem Vorhandensein leerer Haftstellen in der Probe variiert, die der Sattigungsdosis ausgesetzt wurde. Die Autoren erhielten Ergebnisse aus isothermen Abklingkurven, die diese Argumente bestatigten. In vorl-egender Arbeit wird durch eine Analyse ihrer Ergebnisse gezeigt, da13 die von ihnen beobachtete Anderung ubertrieben und nicht in Ubereinstimmung mit den Glowkurven ist.

A new method for obtaining the trap parameters of complex thermoluminescence glow peaks

“…Following Moharil [19][20][21][22], it is assumed that the glow curve consists of a single flow peak, corresponding to traps of only one kind. It is also assumed that all the traps are emptied at the end of the glow curve.…”

A new method for obtaining the order of kinetics and the activation energy of the thermoluminescence glow peak

“…We now present the mathematical details of the present work based on which it is possible to calculate the area of a part from the glow curve at certain temperature. Following Moharil [35][36][37][38], it is assumed that the glow curve consists of a single glow peak, corresponding to traps of only one kind. It is also assumed that at the end of the glow curve all the traps are emptied.…”

Thermoluminescence of alkali halides doped with alkaline earth impurities

“…There has been some controversy over the order of kinetics , 1983aLilley 1982, Lilley andTaylor 1981;Lilley and McKeever 1983;Moharil 1981dMoharil , 1983cMoharil , 1984b. In most of the glow curve fitting and isothermal decay analyses, first order kinetics is assumed.…”