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首页> 外文期刊>The Journal of Chemical Physics >COLLISIONAL DEACTIVATION OF K IN THE HIGH-LYING S-2 AND D-2 STATES BY HE, NE, AND AR
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COLLISIONAL DEACTIVATION OF K IN THE HIGH-LYING S-2 AND D-2 STATES BY HE, NE, AND AR

机译：HE，NE和AR在高S-2和D-2态对K的集体钝化

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摘要

By measuring time-resolved fluorescence signals, we have obtained radiative lifetimes and total cross sections for collisional deactivation by He, Ne, and Ar of K n S-2 and (n-2)D-2 states (n=7-11). The radiative lifetimes obtained agree with those previously reported. The cross sections, in the range of 15-180 Angstrom(2), generally increase with increasing the principal quantum number. Their magnitudes for the n S-2 and (n-2)D-2 states are similar. The results are closely related to the geometric size of the excited K states, and weakly dependent on their orbital angular momentum. Our case differs from the K*-H-2, collision, in which the electron harpoon mechanism should be involved. Our case also differs from the collision of Na* with rare gas; the latter easily induces l-mixing (l greater than or equal to 2) of the same n. We have also found that the relative efficiency for He and Ar is different in quenching of the low-lying and the high-lying K states. When n is small, the total cross section of deactivation by He collision is larger than that by Ar collision, but is reversed for the high-lying states. Detailed discussion on these phenomena is presented. (C) 1996 American Institute of Physics. [References: 39]
机译：通过测量时间分辨的荧光信号，我们获得了K n S-2和（n-2）D-2状态（n = 7-11）的He，Ne和Ar碰撞灭活的辐射寿命和总截面。 。获得的辐射寿命与先前报道的一致。横截面通常在15-180埃（2）的范围内，随主量子数的增加而增加。它们在n S-2和（n-2）D-2状态下的大小相似。结果与激发的K态的几何尺寸密切相关，而与它们的轨道角动量几乎无关。我们的情况与K * -H-2碰撞不同，后者涉及电子鱼叉机制。我们的案例也不同于Na *与稀有气体的碰撞。后者容易引起相同n的l混合（l大于或等于2）。我们还发现，在低态和高态K态的猝灭中，He和Ar的相对效率不同。当n小时，He碰撞的失活总截面大于Ar碰撞的失活总截面，但对于高处状态则相反。提出了关于这些现象的详细讨论。 （C）1996年美国物理研究所。 [参考：39]

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