Cutoff Theory of Impact Broadening and Shifting of Microwave and Infrared Molecular Spectra.

Abstract

An impact theory is described for pressure broadening and shifting of rotation-vibration lines using a natural cutoff. The theory is based on Anderson's theoretical framework and employs an exponential expansion of the collision matrix elements derived from a linked cluster theorem for degenerate states. The final expression for the interruption function is similar in form to Gordon's semiclassical interruption function. Closed-form expressions for the broadening and shift cross sections are given for exactly resonant dipole-dipole collisions, and an exact calculation for the HC1 self-broadening in the 0 to 2 vibrational band. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1981
Accession Number
ADA098315

Entities

People

  • David Korff
  • Richard P. Leavitt

Organizations

  • Harry Diamond Laboratories

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Angular Momentum
  • Classification
  • Collisions
  • Coordinate Systems
  • Differential Equations
  • Dipole Moments
  • Electron Tubes
  • Equations
  • Military Research
  • Momentum
  • Perturbation Theory
  • Perturbations
  • Phase Shift
  • Power Series
  • Quantum Numbers
  • Security
  • Vector Spaces

Fields of Study

  • Physics

Readers

  • Molecular Photonics/Laser Physics
  • Spectroscopy.
  • Statistical inference.