Accession Number : ADA199205


Title :   Vibrational Relaxation and Electronic Quenching-Rate Coefficients for BiF (A0+,v1) by SF6


Descriptive Note : Technical rept.


Corporate Author : AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS


Personal Author(s) : Helvajian, H ; Holloway, J S ; Koffend, J B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a199205.pdf


Report Date : 22 Aug 1988


Pagination or Media Count : 13


Abstract : The kinetic data base is extended for the A-state of BiF to include SF6 as a collision partner. By applying a four-level finite difference fitting routine to time-resolved fluorescence traces from v' = 0-3, one obtains rate coefficients for electronic quenching, as well as for vibrational relaxation within the A-state manifold. As was the case for our previous results with He and Ar, electronic quenching is slow in comparison to radiative decay. Vibrational relaxation does not show a simple v' dependence, but rather, for the levels examined, increases markedly for higher v'. Our results confirm the suitability of SF6 as a bulk diluent in the proposed NF/BiF chemical laser system.


Descriptors :   *FLUORESCENCE , *CHEMICAL LASERS , MOLECULAR VIBRATION , COMPARISON , RATES , ACCURACY , QUENCHING , TIME , COEFFICIENTS , RELAXATION , KINETICS , FLUORIDES , RADIOACTIVE DECAY , SULFUR COMPOUNDS , BISMUTH COMPOUNDS , DATA BASES , ELECTRONICS


Subject Categories : Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE