The study of E-E energy transfer between CO(a3Π, ν′) and NO(X2Π, ν″ = 0) in beams

✍ Scribed by Guanlin Shen; Hong Chen; Dadong Xu; Xuechu Li; Nanquan Lou; Chuanpu Liu; Jingzhong Guo

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 572 KB
• Volume: 257
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(96)00568-4

✦ Synopsis

The formation of NO (A,v) and NO(B,v) was investigated from the reaction Co(a,v') + NO(X,v" -0) in a beam-beam configuration. The nascent rovibrational distributions of NO(A,v-0-2) and NO(B,v-0-2) were determined from NO(A ~ X) and NO(B ~ X) emissions by means of spectral simulation. The branching ratio of NO(A) to NO(B) was determined to be 7//3 -1.3 4-0.3 by using the total emission intensities of NO(A) and NO(B). Experiments also show that the vibrational distribution of NO(A) is sensitive to the vibrational distribution of CO(a,v'). An electron exchange mechanism is proposed for the reaction. * Corresponding author.

-* X) 7 band and NO(B-o X) /3 band emissions. As regards the quenching rate of CO(a) by NO, good agreement was obtained among several investigations [2][3][4][5]. Taylor and Setser [5] have reported the branching ratio for their He * (7//3 ffi 1.5 ± 0.2) and Ar*(7//3 ffi 2.1 ± 0.2) measurements. Sianger and Black [2] have measured the ratio to be 2.3. Recently, Thomas and Katayama [7] have reinvestigated the energy transfer reaction CO(a,v') + NO(X) in a flow system using different vibrationally excited CO(a,v') reactants. They clearly demonstrated that the ratio 7o//3o decreases dramatically with the increase of vibrational populations of CO(a,v' > 0). Although having obtained 7o//3o for four different CO(a,v') vibrational population distributions, they did not present the vibrational state-to-state transfer rates.