Evolution from a Molecular Rydberg Gas to an Ultracold Plasma in a Seeded Supersonic Expansion of NO

被引：87

作者：

Morrison, J. P. ^{[1
]}

Rennick, C. J. ^{[1
]}

Keller, J. S. ^{[1
,2
]}

Grant, E. R. ^{[1
]}

机构：

[1] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z3, Canada

[2] Kenyon Coll, Dept Chem, Gambier, OH 43022 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 20期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Molecular beams - Laser excitation - Rydberg states - Molecules - Ionization of gases;

D O I：

10.1103/PhysRevLett.101.205005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the spontaneous formation of a plasma from a gas of cold Rydberg molecules. Double-resonant laser excitation promotes nitric oxide, cooled to 1 K in a seeded supersonic molecular beam, to single Rydberg states extending as deep as 80 cm(-1) below the lowest ionization threshold. The density of excited molecules in the illuminated volume approaches 1x10(13) cm(-3). This population evolves to produce free electrons and a durable cold plasma of electrons and intact NO+ ions.

引用

页数：4

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