Neutron scattering studies of (CN)/sup -/ defects in KBr

Journal Article · Thu May 15 04:00:00 EDT 1980 · Phys. Rev., B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.21.4863· OSTI ID:5297327

Rowe, J M; Rush, J J; Shapiro, S M; Hinks, D G; Susman, S

We have studied both the librational and the tunneling excitations of (CN)/sup -/ ions in a KBr matrix through the interaction of these modes with the acoustic phonons of the KBr host. From our measurements on a sample containing 0.00034 mole fraction of KCN in KBr, we find that A/sub 1g/-T/sub 2g/ tunnel splitting to be 0.28 +- 0.05 meV (2.3 +- 0.4 cm/sup -1/). From measurements on a more concentrated system, 0.0045 mole fraction of KCN in KBr, the A/sub 1g/-E/sub g/ librational excitation energy is found to be 1.6 +- 0.1 meV (13.0 +- 1.0 cm/sup -1/). These values are consistent with the results of optical measurements.

• Research Organization: National Measurement Laboratory, National Bureau of Standards, Washington, D.C. 20234
• OSTI ID: 5297327
• Journal Information: Phys. Rev., B: Condens. Matter; (United States), Journal Name: Phys. Rev., B: Condens. Matter; (United States) Vol. 21:10; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
COHERENT SCATTERING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
CYANIDES
DIFFRACTION
ENERGY LEVELS
HALIDES
HALOGEN COMPOUNDS
MONOCRYSTALS
NEUTRON DIFFRACTION
PHONONS
POTASSIUM BROMIDES
POTASSIUM COMPOUNDS
QUASI PARTICLES
SCATTERING
TUNNEL EFFECT