氯化碘B^3Π_0~＋态的激光诱导荧光及碰撞动力学研究

LADER INDUCED FLUORESCENCE AND COLLISIONAL ELECTRONC QUENCHING STUDIES OF THE B￣3Π_0￣+ STATE OF ICI

研究了氯化碘的Ｂ３态（振动能级Ｖ＇＝１２、１６）的发散荧光光谱和碰撞电子淬火．借助激光诱地荧光（ＬＩＦ）的方法，以氩离子激光器的５０２．３ｎｍ和５１４．５ｎｍ谱线做为泵浦源，并使用稳态近似处理得到了这两个态与气态ＩＣｌ、Ｈ２Ｏ、ＣＨ２Ｃｌ２、ＣＨ３ＯＨ、Ｃ２Ｈ５ＯＨ、ＣＨ３ＮＨ２、Ｃ２Ｈ５ＮＨ２、ＣＣｌ４和苯分子碰撞的电子淬灭速率常数和碰撞截面。我们探讨了分子间的相互作用，并且对比了ＩＣｌ和ＩＦ的动力学模型。对于ＩＦ，偶极－偶极相互作用被成功地用于解释其碰撞电子淬灭机理。但是，本文证实：在ＩＣＩ被其碰撞伴侣淬灭的过程中，碰撞对之间的偶极－偶极相互作用并非占主导地位。需要提出新的模型来解释这类碰撞。最后，我们简要讨论了使用ＩＣｌ作为一种化学泵浦激光的介质的可能性．

In this paper we have studied the dispersed fluorescence sperctra and collisionalelectronic quenching of the B3 state (Vibrational energy' levels v'= 12. 16) of ICI. By themethod of Laser induced Fluorencence (LIF),in which the 502.3urn and sl4.snm line of Argonarser are used as the pumping source, and using steady state approximation, their collisionaleleCtronic quenching rate constants and collisional cross sections with gaseous molecules ICI.H2O. CH2Cl2. CH3OH.C2H5OH. CH3NH2. C2H5NH2.CCL4 and Benzene areabtained.We have made some inquiries into the interaction of molecules and compared the dynamicmodel of ICl with that of IF, in which case the dipole-dipole interaction was successfully usedtO explain the mechanism of collisional electronic quenching. BUt it is proved in the paper thatthe dipole-dipole interaction between the collision pairs is not the dominated trem in the process of collisional quenching of ICI by is partners.It is needed to advance new models to interpret this kind of collision. Finally we briefly discussed the opssibility of using ICI as a kind materials for chemicallypumped laser.