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Citation: Ma Zhiliu, Huang Ruiping. RELAXATION STUDIES OF IODINE MOLECULES IN SUPERSONIC JETS Ⅱ. VIBRATIONAL RELAXATION[J]. Acta Physico-Chimica Sinica, ;1987, 3(05): 474-478. doi: 10.3866/PKU.WHXB19870507 shu

RELAXATION STUDIES OF IODINE MOLECULES IN SUPERSONIC JETS Ⅱ. VIBRATIONAL RELAXATION

Ma Zhiliu ,
Huang Ruiping

1.
Dalian Institute of Chemical Physics Academia Sinica

Received Date: 24 February 1986
Available Online: 15 October 1987

Using LIF technique, the distribution of vibrational temperature of I_2 along a supersonic jet axis has been measured, He, Ar and N_2 are used as carrier gases, The vibrational relaxation cross-section has been estimated, based on the “sudden freeze” model. The classical Landau-Teller theory can not be used to explicate that phenomenon: the vibrational relaxation cross-section become larger in low temperature. The mechanism of vibrational relaxation in jets has been analysed with the “orbiting resonance” model qualitatively.
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