Properties of lithium hydride—III. Paramagnetic resonance of color centers

Concentrations of F-centers in excess of 1017cm3 have been produced in single crystals of LiH by neutron irradiation at 78°K. The ESR absorption of the F-centers has been observed at g = 2.004 ± 0.001. The saturation parameter of the ESR absorption (T1T2)12 is dose to that for F-centers in KC1. From r.m.s. line width measurements on LiH crystals of various isotopic compositions (Li7H, Li7D, Li6H and Li6D), spin densities of the F-center electron at the Li+ and H− sites have been estimated.