Volume 142, 2009
From the journal:

Faraday Discussions

Production of cold ND3 by kinematic cooling

Jeffrey J. Kay,a   Sebastiaan Y. T. van de Meerakker,b   Kevin E. Strecker*a  and  David W. Chandler*a  

* Corresponding authors

a Sandia National Laboratories, Livermore, CA 94550, USA
E-mail: kstreck@sandia.gov, chand@sandia.gov

b Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany

Abstract

We have produced translationally cold ammonia (ND3) molecules in various quantum states by kinematic cooling. In these experiments, ND3 molecules are brought nearly to rest in the (J, K) = (2,0), (2,1), (2,2), (3,1), (3,2), and (3,3) rotational levels of the ground vibronic state by rotationally-inelastic collisions with Ne atoms. The cold molecules are produced in quantum-state-dependent velocity distributions whose laboratory frame velocities are measured to be between 21 m s−1 (Etrans/k = 530 mk) and 32 m s−1 (Etrans/k = 1.2 K), and are calculated to be between 7.5 m s−1 (Etrans/k = 70 mK) and 27 m s−1 (Etrans/k = 880 mK). Due to systematic experimental effects, the measured velocities are upper limits to the actual velocities. These temperatures are low enough that it should be possible to use electrostatic traps to confine cold molecules in many of these quantum states.

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Article information

DOI
https://doi.org/10.1039/B819256C
Article type
Paper
Submitted
29 Oct 2008
Accepted
05 Jan 2009
First published
19 May 2009

Faraday Discuss., 2009,142, 143-153

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Production of cold ND3 by kinematic cooling

J. J. Kay, S. Y. T. van de Meerakker, K. E. Strecker and D. W. Chandler, Faraday Discuss., 2009, 142, 143 DOI: 10.1039/B819256C

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