物理化学学报 >> 1987, Vol. 3 >> Issue (05): 474-478.doi: 10.3866/PKU.WHXB19870507

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超音速射流中I2的弛豫过程
Ⅱ. 振动弛豫

马之骝; 黄瑞平   

  1. 中国科学院大连化学物理研究所
  • 收稿日期:1986-02-24 修回日期:1986-08-16 发布日期:1987-10-15

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

Ma Zhiliu; Huang Ruiping   

  1. Dalian Institute of Chemical Physics Academia Sinica
  • Received:1986-02-24 Revised:1986-08-16 Published:1987-10-15

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摘要： 利用激光诱导荧光测量I_2在He、Ar、N_2载气的射流中振动温度沿射流轴线的分布; 利用“突然凝结”模型估算了振动弛豫截面; 结合成轨共振模型分析了射流中的振动驰豫机理。

Abstract: 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.