“…Namely, r 0 has been set equal to half the first, second and third nearest neighbour (nn) distance in bcc Fe, as well as equal to 1.9a 0 /2, 2.2a 0 /2 and 3.3a 0 /2. Thus, the involved objects will react when they find themselves at a mutual distance of first, second and third nn, as well as 1.9a 0 [22], 2.2a 0 [66] and 3.3a 0 [65] (or larger, if the SIA bias factor of Table 2 is allowed for). The latter two values correspond to the experimental assessment of the SIAvacancy recombination radius in Fe.…”