The amount of the first stage coloration in KCl1-xBrx, doped with Pb2+ has
been investigated as a function of the dose rate and impurity concentration
. For a dose rate of 12.88 kGy/h, the F color center production was indepen
dent of the quantity of Pb2+, and varied according to the ratio KCl/KBr. At
a proportion of 50% of each halogen the typical stages were observed. Howe
ver, if the dose rate is less than 3.22kGy/h, the coloration production dep
ends on the quantity of Pb. (C) 2001 Elsevier Science Ltd. All rights reser
ved.