Enhancement of Rb fine-structure transfer in 4He due to three-body collisions

被引：10

作者：

Sell, J. F. ^{[1
]}

Gearba, M. A. ^{[2
]}

Patterson, B. M. ^{[1
]}

Genda, T. ^{[1
]}

Naumann, B. ^{[1
]}

Knize, R. J. ^{[1
]}

机构：

[1] USAF Acad, Laser & Opt Res Ctr, Dept Phys, Colorado Springs, CO 80840 USA

[2] Univ So Mississippi, Dept Phys & Astron, Hattiesburg, MS 39406 USA

来源：

OPTICS LETTERS | 2010年 / 35卷 / 13期

基金：

美国国家科学基金会;

关键词：

EXCITATION TRANSFER; RUBIDIUM; GAS;

D O I：

10.1364/OL.35.002146

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Using ultrafast laser excitation and time-correlated single-photon counting techniques, we have measured the collisional mixing rates between the rubidium 5(2)P fine-structure levels in the presence of He-4 gas. A nonlinear dependence of the mixing rate with He-4 density is observed. We find Rb fine-structure transfer is primarily due to binary collisions at He-4 densities of <= 10(19) cm(-3), while at greater densities, three-body collisions become significant. We determine a three-body collisional transfer rate coefficient (5(2)P(3/2) -> 5(2)P(1/2)) of 1.25(9) x 10(-32) cm(6)/s at 22 degrees C. (C) 2010 Optical Society of America

引用

页码：2146 / 2148

页数：3

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