Accession Number : ADA181271
Title : BiF(AO+, v') Radiative Lifetimes and Rate Coefficients for V yields T Transfer and Electronic Quenching.
Descriptive Note : Technical rept.,
Corporate Author : AEROSPACE CORP EL SEGUNDO CA AEROPHYSICS LAB
Personal Author(s) : Heidner,R F , III ; Helvajian,H ; Holloway,J S ; Koffend,J B
Report Date : 24 Apr 1987
Pagination or Media Count : 28
Abstract : The radiative lifetime for several vibrational states (v'=0-3) was measured for electronically excited BiF(AO+). The measured radiative lifetime is 1.4 micro and does not vary for the v' levels investigated. Also measured for those v' levels are the electronic quenching and V-T rate coefficients for the rare gases He and Ar at an experimental temperature of approx. 485 K. The results indicate Ar is slightly more efficient in electronic quenching than is He. For both gases the quenching rate constants increase with v', and the rates become competitive with the radiative decay rate for pressures in excess of 40 Torr. The vibrational relaxation (V-T) rate constant for all levels studied is at least an order of magnitude greater than those for electronic quenching. The reported V-T rate coefficients scale as V1.7 for both He and Ar for v' = 0 to v' = 3, a result that is contary to the behavior predicted by the classical harmonic oscillator model. Keywords: Gas phase, Rates, Radiative, Lifetime, Electronic state, Electronic, Quenching, Vibrational, Distribution.
Descriptors : *ELECTRONICS , *ELECTRONIC STATES , *QUENCHING , *RADIOACTIVE DECAY , GASES , HARMONIC GENERATORS , LIFE SPAN(BIOLOGY) , MODELS , CONSTANTS , RADIATION , RADIOACTIVE DECAY , RARE GASES , RATES , COEFFICIENTS , RELAXATION , TIME , TRANSFER , VIBRATION , YIELD
Subject Categories : Nuclear Physics & Elementary Particle Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE