Correlation of the Optical and Electron-Spin-Resonance Absorptions of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>H</mml:mi></mml:math>Center in KCl

Abstract

It has been shown that the optical $H$ band and the ESR $H$ spectrum arise from the same center, the $H$ center, in KCl. Similar to the ${\mathrm{Cl}}_{2}^{\ensuremath{-}}$ (or ${V}_{K}$) center, the $H$ center has two optical transitions: A strong and highly $\ensuremath{\sigma}$-polarized transition giving rise to an absorption band at 336 nm, and a much weaker transition, which is very weakly $\ensuremath{\sigma}$-polarized, giving rise to an absorption band at 522 nm. The disorientation temperature of the $H$ center has been found to be (10.9\ifmmode\pm\else\textpm\fi{}0.3)\ifmmode^\circ\else\textdegree\fi{}K.