期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1983
卷号：80
期号：4
页码：983-987
DOI：10.1073/pnas.80.4.983
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：By postulating temperature-dependent equilibria between two or more electron carriers acting as traps for electrons or holes, it is possible to modify the Randall-Wilkins theory of thermoluminescence so as to explain the abnormally large apparent activation energies and apparent frequency factors observed in photosynthetic glow curves when fitted by unmodified Randall-Wilkins theory. The equilibria serve to inhibit the formation of the light-emitting excited state by withholding the needed precursor state. When the inhibition is released at higher temperature by shift of equilibrium with temperature, the rise of the glow peak can be much faster than would result from Arrhenius behavior based on the true activation energy and so appears to correspond to a higher activation energy accompanied by a larger frequency factor. From another viewpoint, the enthalpy changes, {Delta}H, of the equilibria tend to add to the activation energy. Similarly the entropy changes, {Delta}S, of the equilibria tend to add to the entropy of activation, giving the large apparent frequency factors. The positive values of {Delta}S needed would correspond to entropy decreases in the forward early electron transport. A comparison of the glow peaks obtained by different workers is also presented.
关键词：thermoluminescence ; delayed light ; reversed electron flow ; electron and hole traps
