Analysis of the accumulation equations

Some analytic expressions are collected in Table 7.6 that have been used in literature to describe the experimental accumulation kinetics, n t), or dn/df, the rate of concentration accumulation. Experimentally such kinetics have been studied, both in the alkali-halide crystals [13, 17] and in many metals [43-45] in a wide temperature interval, starting with low (liquid-helium, 4 K) temperatures. Since often a succesful approximation of the accumulation curve is associated with better understanding of a micromechanism of defect formation (see, e.g., [40]) and with other important physical conclu- 

Different forms of the approximations of the accumulation curve n(f) and the rate of accumulation, dn(t)/dt [35] 

Two terms of the expansion (2) in nva C 1, no = l/(2uo) which coincides with the result of the superposition approximation 

Four terms of the expansion (2) in nv 1. Note that in [41] the coefficient for the cubic term is pointed out erroneously as 0.01 instead of 2/3 

For temperatures at which defects are immobile, and for moderate radiation doses. Owing to incompletely taking account of the correlation of similar defects, n 00 as t — 00 

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