Iodine Monofluoride Energy Transfer Studies.
Abstract
Electronic-to-electronic (E-E) energy transfer from NF(b superscript 1 sigma +) to IF(X superscript 1 sigma +), producing IF(B superscript 3 Pi(O+)), 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 NF(a superscript 1 delta)+I* pooling reaction for the temporally resolved studies. Results of this study show that the source of IF(B superscript 3 Pi(O+)) 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 NF(b 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 cc/molecule/s for an IF(x 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1986
- Accession Number
- ADA169781
Entities
People
- A. T. Pritt