Bond dissociation energies of PbBr{sub 2}(g) and the dye laser-induced fluorescence excitation spectrum of PbBr(A-X)
- New Mexico State Univ., Las Cruces, NM (United States)
- Los Alamos National Lab., NM (United States)
An equilibrium thermodynamics determination of the individual bond dissociation energies in PbBr{sub 2}(g) is presented, yielding 66.5 x 3.5 and 59.4 x 3.5 kcal/mol for the successive removal of Br atoms. These results are based on atomic absorption measurements of Pb(g) number densities and laser-induced fluorescence measurements of relative PbBr(g) number densities in equilibrium with PbBr{sub 2}(g) at temperatures between 700 and 850{degree}C. The laser-induced fluorescence excitation spectrum of PbBr(A-X), excited between 467 and 485 nm and observed between 516 and 536 nm, is reported. Lifetime measurements of PbBr(A) at various PbBr{sub 2} number densities yielded a collision-free lifetime of approximately 200 ns and a PbBr{sub 2} collisional quenching constant of 1.42 x 10{sup -9} cm{sup 3} molecule{sup -1} s{sup -1}. 23 refs., 10 figs., 4 tabs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 91264
- Journal Information:
- Journal of Physical Chemistry, Vol. 99, Issue 29; Other Information: PBD: 20 Jul 1995
- Country of Publication:
- United States
- Language:
- English
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