Spectroscopic and Vibrational Energy Transfer Studies in Molecular Bromine
Abstract
Vibrational transfer and electronic quenching in the lower vibrational levels (v'less than or equal 3) of the B3pi(Ou+) state of 79Br2 were investigated using spectrally resolved, temporally resolved laser induced fluorescence techniques. Spectrally resolved emissions from collisionally populated Br2(B) vibrational levels were observed for Br2 and rare gas collision partners. Vibrational transfer was efficient in the non-predissociative vibrational levels and was adequately described by the Montroll-Shuler model for harmonic oscillators. A single fundamental rate coefficient for vibrational transfer from v' = 1 to v'= 0, kv(1,0), characterizes vibrational relaxation. For Br2, the value was kv(1,0) = 3.6 + or - 0.4 x 10 exp-11 cu cm/molec.sec. For rare gas collisions, values ranged from kv(1,0) = 2.5 + or - 0.3 x 10 exp-11 cu cm/molec.sec for helium to kv(1,0) = 3.1 +/- 0.4 x 10 exp-11 cu cm/molec.sec for xenon. Electronic quenching rates for the observed vibrational levels were obtained from the same data. For Br2, the quenching rate coefficient was kq = 3. 7 + or - 1.2 x 10 exp-11 cu cm/molec.sec. Quenching rate coefficients for the rare gases were smaller, kq = 8.0 + or - 1.2 x 10 exp-12 cu cm/molec.sec.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1993
- Accession Number
- ADA273795
Entities
People
- Courtney D. Holmberg
Organizations
- Air Force Institute of Technology