## Energy transfer between vibrationally excited CO and COz has been used to excite the bendini mode of COa. The rate of deactivation of this mode by CO\* and by Ar has been measured down to 150 K. The followรฏng processes were considered CO@= 1) + co,(ooo) Ke 5 CO(u=O) + CO,(OOl), AE = t206 crneL
The vibrational deactivation of the (0001) mode of N2O measured down to 150 K
โ Scribed by R.M. Siddles; G.J. Wilson; C.J.S.M. Simpson
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 312 KB
- Volume
- 225
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Rate constants are reported for the vibrational deactivation of the asymmetric stretching mode of NsO in the gas phase over the temperature range 300-150 K. Experimental pressures varied between 10 and 600 Torr. The collision partners studied are NsO itself, 02, N2 and CH+ The measurements were made using the laser-induced fluorescence technique. NsO was pumped directly to the N20(O001 ) level by an HBr laser. This excitation technique has been used before for the study of the asymmetric stretching mode of COs, but this is the first time that it has been applied to NsO.
๐ SIMILAR VOLUMES
Probabilities for the (VT) and (VR) deactivation of CO have been calculated from relaxation times measured down to 77 K using laser fluorescence. Only in the case of deactivation by p-H2 is the (VR) process important; its rate exceeds that for (VT) deactivation between 320 K and 110 K.
Vibration to vibration and rotation (WR) exchange occurs between CO and D, over the temperature range 340 K to 230 K, whilst at lower temperatures VT deactivation is dominant. Probabilities for these processes and for D, -D, deactivation are presented.
Rate constants for the vibrational deactivation of 12C1b by Hz, Dz and 'He have been determined by laser-induced fluorescence in the gas phase at low temperatures. The rate constants for 12C160( u= 1 )-H2 and '\*C?O( u= 1 )-D2 have been measured down to 35 K and those for '\*C%(o= 1 )-'He have been