A bright, slow cryogenic molecular beam source for free radicals

被引：78

作者：

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

Shuman, E. S. ^{[1
]}

DeMille, D. ^{[1
]}

机构：

[1] Yale Univ, Dept Phys, New Haven, CT 06520 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2011年 / 13卷 / 42期

关键词：

METAL CLUSTER BEAMS; FREE-JET EXPANSIONS; POLAR-MOLECULES; SUPERSONIC JETS; GAS MIXTURES; TEMPERATURES; HE; SEPARATION; COLLISIONS; CHEMISTRY;

D O I：

10.1039/c1cp20335e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We demonstrate and characterize a cryogenic buffer gas-cooled molecular beam source capable of producing bright beams of free radicals and refractory species. Details of the beam properties (brightness, forward velocity distribution, transverse velocity spread, rotational and vibrational temperatures) are measured under varying conditions for the molecular species SrF. Under typical conditions we produce a beam of brightness 1.2 x 10(11) molecules/sr/pulse in the X-2 Sigma(+)(nu = 0, N-rot = 0) state, with 140 m/s forward velocity and a rotational temperature of approximate to 1 K. This source compares favorably to other methods for producing beams of free radicals and refractory species for many types of experiments. We provide details of construction that may be helpful for others attempting to use this method.

引用

页码：18936 / 18947

页数：12

共 73 条

[1] MOLECULAR BEAMS WITH ENERGIES ABOVE 1 ELECTRON VOLT [J].