Recombination of e with hole centres

The possibility of long-range electron tunneling in reactions of etr was first suggested for recombination reactions of e with hole centres. Direct experimental proof of the reality of this phenomenon was also obtained in studying this type of reaction. 

In 1965, trapped electrons, etr, formed during the y-radiolysis of MTHF were found to be unstable at 77 K [30]. The decay kinetics of these particles in the range 5 x 103 - 9 x 105 s after the end of irradiation is presented in Fig. 8. As seen from the figure, for short times a fast decay of etr was 

A theoretical model of the low-temperature decay of etr in MTHF discovered in ref. 30 was suggested in ref. 31. According to this model, the disappearance of et in y-irradiated MTHF at 77 K is due to electron tunneling from a trap to a hole centre. The form of the potential barrier for electron tunneling used in ref. 31 to analyze the curves of the decay of etr is represented schematically in Fig. 9(a). To evaluate the probability of tunneling per unit of time, the Gamow formula 

Indeed, in the presence of a channel for tunnel recombination, stabiliza- 

Publications [30-32] have played an essential stimulating role in the development of broader research on tunnel electron transfer reactions. However, ref. 30 did not contain any experimental data that could reliably exclude the possibility of a diffusion mechanism for the decay of etr. Nor did 

---