Accession Number:

ADA169781

Title:

Iodine Monofluoride Energy Transfer Studies.

Descriptive Note:

Final rept. 13 Jun 83-31 Oct 84,

Corporate Author:

ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER

Personal Author(s):

Report Date:

1986-06-01

Pagination or Media Count:

77.0

Abstract:

Electronic-to-electronic E-E energy transfer from NFb superscript 1 sigma to IFX superscript 1 sigma , producing IFB superscript 3 PiO, was investigated using both spatially resolved data from a chemiluminescence flow tube apparatus and temporarily resolved data following pulsed excitation in a flow tube. The b superscript 1 sigma state of NF was generated by the F-HN3 reaction under steady-state flow tube conditions and by the NFa superscript 1 deltaI pooling reaction for the temporally resolved studies. Results of this study show that the source of IFB superscript 3 PiO in these chemiluminescence reactions stems from E-E energy transfer, that the rate of the transfer reaction depends strongly on the vibrational distribution in the ground state of IF, that the rate is independent of the vibrational distribution in the NFb superscript 1 sigma , and that the efficiency of the transfer rate is greater than 20. The rate constant for the E-E energy transfer was measured to be 1.5 or - 0.2 x 10 to the -11 power ccmolecules for an IFx superscript 1 sigma vibrational distribution corresponding to 800 K. These results are explained in terms of an energy transfer mechanism requiring that the individual state-to-state rates are proportional to the probabilities associated with vertical transitions. Keywords Chemical laser Chemiluminescence Iodine monofluoride Electronic energy transfer Energy transfer efficiency Nitrogen monofluoride Pumping Mechanism.

Subject Categories:

  • Lasers and Masers
  • Atomic and Molecular Physics and Spectroscopy
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE