Penning collisions of laser-cooled metastable helium atoms

被引：16

作者：

Pereira Dos Santos F. ^{[1
]}

Perales F. ^{[2
]}

Léonard J. ^{[1
]}

Sinatra A. ^{[1
]}

Wang J. ^{[1
,7
]}

Saverio Pavone F. ^{[3
,4
]}

Rasel E. ^{[5
]}

Unnikrishnan C.S. ^{[6
]}

Leduc M. ^{[1
]}

机构：

[1] Laboratoire Kastler Brossel, Dept. Phys. de l'Ecl. Normale Sup., Paris Cedex 05

[2] Laboratoire de Physique des Lasers, Université Paris-Nord, 93430 Villetaneuse, avenue J.B. Clément

[3] Dept. of Physics, Univ. of Perugia, Perugia, Via Pascoli

[4] Lens and INFM, Firenze

[5] Universität Hannover, 30167 Hannover

[6] TIFR, Mumbai 400005, Homi Bhabha Road

[7] Institute of Opto-Electronics, Shanxi University, Taiyuan

来源：

The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics | 2001年 / 14卷 / 1期

关键词：

PACS. 32.80.Pj Optical cooling of atoms; trapping – 34.50.Rk Laser-modified scattering and reactions;

D O I：

10.1007/s100530170228

中图分类号：

学科分类号：

摘要：

We present experimental results on the two-body loss rates in a magneto-optical trap of metastable helium atoms. Absolute rates are measured in a systematic way for several laser detunings ranging from -5 to -30 MHz and at different intensities, by monitoring the decay of the trap fluorescence. The dependence of the two-body loss rate coefficient β on the excited state (23P2) and metastable state (23S1) populations is also investigated. From these results we infer a rather uniform rate constant Ksp = (1 ± 0.4) × 10-7 cm3/s.

引用

页码：15 / 22

页数：7

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