Accession Number:

AD0784952

Title:

Rotational Relaxation Measurements and Resonant Phenomena in Laser- Excited Hydrogen Fluoride

Descriptive Note:

Final rept. 1 Mar 1973-28 May 1974

Corporate Author:

ENVIRONMENTAL RESEARCH INST OF MICHIGAN ANN ARBOR

Report Date:

1974-06-01

Pagination or Media Count:

57.0

Abstract:

Rates for the transfer of rotational energy R-R in vibrationally excited HF gas were measured using a single laser pump-probe technique. The relaxation time was found to be inversely proportional to HF pressure in the mTorr range and the self-relaxation rate constant was determined. Rotational relaxation of HF gas due to the presence of additive gases was observed. The relaxation rate for H2 was measured. The temporal evolution of HF laser pulses was examined and compared with the vibrational fluorescence of the laser discharge and the temporal gain of the discharge. The importance of hydrogen in the discharge is discussed. Reported observations of several resonant processes include bleaching, self-induced transparency, optical nutations, and an anomalous increase of 40 in the refractive index.

Subject Categories:

  • Lasers and Masers
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE