Research Papers in Physics and Astronomy


Date of this Version

March 1971


Published by American Physical Society. Phys. Rev. Lett 26, 512 (1971). Copyright © 1971 American Physical Society. Permission to use.


Lattice resonances of Eg symmetry (16.35 cm-1) and A1g symmetry (25 cm-1) have been found in KI:Ag+ using far-infrared spectroscopic techniques. The two even-parity modes are found to be anharmonically coupled to the T1u- symmetry resonant mode at 17.3 cm-1, giving rise to the combination bands observed at 30 and 44.4 cm-1.

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