Variation of the Frenkel Pair Production Efficiency Between 80 K and 220 K in KBr

Abstract

We have measured the F center production efficiency in KBr between 80 K and 220 K from kinetics of disappearing F₂ centers and creation kinetics of H_A(Li). This efficiency increases following an Arrhenius law with an activation energy of about 0.025 eV. We discuss the apparent agreement between the energy activation value obtained by these experiments and the one obtained from pulse irradiations. The increase of the creation yield can be understood with the recently proposed Toyozawa’s model for F-H pair formation.