Absorption of Ultrasound in Organic Crystals,

Abstract

In this paper an expression for the transition rate for a molecule in an organic crystal to absorb three phonons of lattice energy into the lowest frequency molecular vibrational mode (0 to 1 transition) is presented. The model is a three dimensional simple cubic lattice with nearest neighbor central and noncentral forces between molecules situated at the lattice sites. After making some approximations, the expression is compared with the transition rate determined from ultrasonic experiments on benzene, p-dichlorobenzene, carbon tetrachloride, and cyclohexane. The improvement that the expression offers over the transition rate derived by Liebermann and used by other investigators is discussed.

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1976
Accession Number
ADA025174

Entities

People

  • Denis F. Strenzwilk
  • Peter D. Yedinak

Organizations

  • Ballistic Research Laboratory

Tags

DTIC Thesaurus Topics

  • Carbon Tetrachloride
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Cubic Lattices
  • Frequency
  • Molecules
  • Three Dimensional
  • Transitions

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