Key points are not available for this paper at this time.
The configurational relaxation time for the F₀ (II) center in KCl: Li has been measured with use of picosecond laser techniques. The saddle-point configuration of the electronically excited state is stabilized by means of multiphonon emission, and has a zero-temperature lifetime of 13 psec.
Wiesenfeld et al. (1981) studied this question.