✍ Scribed by B.G. Ershov; F. Kieffer
No coin nor oath required. For personal study only.
ITL kinetics of pure and phenol-containing alkaline glasses obey a reciprocal time faw which can be derived by differentiation from the decay kinetics of trapped electrons. It is compatible with a tunnelling mechanism. 1. introduction It was observed earlier [ 1,2f that trapped electrons (e&) in glassy solutions of alkali hydroxides irradiated with y-rays at 77OK disappeared spontaneously in the presence of efficient scavengers (NO, I NOT and Fe(CNji-).
Their decay rate was practicaliy independent of temperature (77 and 9O'K) and therefore it was proposed that the process involved electron tunnelling. From the effective rate constants found for this decay, a distance of resonant transfer of the electron of about 30 a was calculated by the formula of Gamow [3] (the energy required to liberate the eiectron from its trap was taken to be equal to the energy of photobleaching, i.e., -2.2 ev). In the case of organic non-polar glasses in which the energy of detrap_ ping is considerably smaller (< 1 eV), -this distance may reach about SO A [4] _ The decay of trapped eIectrons in organic glasses was studied, among other methods, by isothermal hnn.inescenceexperiments [S-7]. The rate of Iuminescence decay in methylcyclohexane was found to be identical at 4 and at 77"K, and from this it was conchrded that thermal liberation of trapped electrons cannot piay an important role at either temperature in this glass 181.
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Experiment81 measurements using resistivity techniques to follow the increaise of defeat concentration with eleotron irradiation dose were made on high purity molybdenum and molybdenum doped with nitrogen to two different levels. The m8rked dependence of defect concentration on impurity can be satis