Far infrared absorption of CsBr and CsI crystals doped with OH- and OD-

Abstract

In CsBr:OH- both librational transitions and the “non Devonshire” line have been found. CsBr:OD- displays the expected isotope shift of a librator. Narrow lines in CsBr and CsI, observed directly above the two phonon lattice absorption, are tentatively explained as due to OH- aggregates.