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Citation: Ma Zhiliu, Huang Ruiping. RELAXATION STUDIES OF IODINE MOLECULES IN SUPERSONIC JETS I. ROTATIONAL RELAXATION[J]. Acta Physico-Chimica Sinica, ;1987, 3(04): 385-388. doi: 10.3866/PKU.WHXB19870410 shu

RELAXATION STUDIES OF IODINE MOLECULES IN SUPERSONIC JETS I. ROTATIONAL RELAXATION

Ma Zhiliu ,
Huang Ruiping

1.
Dalia Institute of Chemical Physics Academia Sinica

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

Using LIF technique, the distribution of rotational temperature of I_2 along the supersonic jet axis has been measured. I_2 was seeded in He, Ar and N_2. Results show that rotational relaxation appears very efficient in jets and Ar and N_2 as car- rier gases are more effective in rotational relaxation than He. The effect of “ve- locity slip” is calculated for I_2 seeded in He and Ar. With He as carrier gas “ve- locity slip” is as large as 360 ms~(-1) compared with 20 ms~(-1) in Ar case, It is pointed out that “velocity slip” would be responsible for the inefficiency He in rotational relaxation of I_2 in our case.
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