Date of Award


Document Type


Degree Name

Master of Science


Department of Engineering Physics

First Advisor

Glen P. Perram, PhD


Vibrational transfer and electronic quenching in the lower vibrational levels of the 79Br2(B; v'≤3) were investigated using spectrally resolved, temporally resolved pulsed laser induced fluorescence techniques. Spectrally resolved emissions from collisionally populated Br2(B) vibrational levels were observed for N2, O2, NO, and SF6collision partners. The vibrational transfer was efficient in the nonpredissociative vibrational levels and is adequately described by the Montroll-Shuler model. An average fundamental vibrational transfer rate coefficient of kv(l,0)=3.4(±0.6) x 10-11 cm3/molec-sec predicts the vibrational transfer rates for the 0≤v'≤3 collisions with N2, and a rate of kv(l,0)=2.9(±0.6) x 10-11 cm3/molec-sec for collisions with 02. Vibrational rates for NO and SF6 range from 1.5(±0.2) x 10-11cm, /molec-sec to 4.0(±1.1) x 10-11 cm3/molec-sec. Electronic quenching rates for the observed vibrational levels were determined from the same data. Quenching rates were seen to be vibrationally dependent and went from a low of kq=0.4(±0.1)x10-11 cm3/molec-sec for N2 (pump v'=2 , view v'=l) to a high of kq=6.9(±1.1) x 10-11 cm3/molec-sec for NO (pump v'=3, view v'=2).

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