Studies on Nonmetals During Irradiation: The Growth ofFCenters in KCl at 85°K

Abstract

Curves of KCl $F$ center versus dose, obtained by making absorption measurements during irradiation with ${\mathrm{Co}}^{60}$ $\gamma$ rays at 85°K, are accurately described by $\alpha \mathrm{}\left(t\right)=A_1[1-\exp (a_{1}t\left)\right]+{\alpha }_{L}t$. After irradiation, the coloring decays less than 1% in 8×${10}^4$ sec. $A_1$ is independent of, and $a_1$ and ${\alpha }_L$ are proportional to, the dose rate. These observations are in accord with a particularly simple phenomenological theory of radiation-induced color-center formation.