Potential barriers for electron tunnelling in low-temperature aqueous glasses (comparison of the computer simulation model with experiments)

The experimental kinetic data on the trapped electron decay in 6 M NaOH aqueous glass doped with electron scavengers were analysed. The electron decay curves obtained by the computer simulation under assumption of the simple tunnelling mechanism of the electron transfer were fitted to the experimental decays. It was found that for a group of scavengers the optimization procedure works well and gives the average barrier height for electron tunnelling between 1.26 and 1.42 eV. There is however a numerous group of scavengers for which the simple tunnelling mechanism does not provide adequate simulated kinetics of the trapped electron decay.