Role of γ‐Radiation Intensity on the First Stage of the Room‐Temperature F‐Colouring in NaCl

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Abstract
An investigation is made of the effect of γ‐ray intensity (within the range 500 to 30000 R/min) on the first stage of room‐temperature F‐colouring in NaCl. In accordance with recent work, the first stage is found to consist of two different components (fast and slow), both of which are observed to be approximately exponential. The saturation value for the fast component seems to be independent of intensity whereas that for the slow component increases with intensity in the same way as the total saturation level. The observed growth rates are not monotonic over the entire intensity range. However, for intensities ≧ 1000 R/min the growth‐rate for both the fast and the slow processes appears to be a decreasing function of γ‐radiation intensity. A brief qualitative discussion of these results in terms of a simple model is presented.