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Vibrational deactivation of the bending mode of CO2 measured between 1500 K and 150 K

โœ Scribed by D.C. Allen; T.J. Price; C.J.S.M. Simpson

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
512 KB
Volume
45
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

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 ; (1) Ae CO@= 1) + co,(ooo) K12 e CO(u=O) f CO,(mr+O), AE = AE,; c0,(001) + CO K21_CO + CO,(mn'O), AE=AE,; CO,(OOl) + M K2m c_ CO,(mn~O)+ M, AE= AE,;

๐Ÿ“œ SIMILAR VOLUMES

The vibrational deactivation of the (000
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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.

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A photoacoustic method is used under such experimental conditions that the (01'0) level ofC02 gas is not in e@li%rinrn with the other vibrational Ievck The rate mnsta.ntsk;o characterizing the CO2 (01'0) collisional deactivation by Nz, CO aad 02 are measured directly.