A cold and slow molecular beam

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A cold and slow molecular beam

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Title: A cold and slow molecular beam
Author: Lu, Hsin-I; Rasmussen, Julia; Wright, Matthew; Patterson, Dave; Doyle, John M.

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Citation: Lu, Hsin-I, Julia Rasmussen, Matthew J. Wright, Dave Patterson, and John M. Doyle. 2011. A cold and slow molecular beam. Physical Chemistry Chemical Physics 13: 18986-18990. doi:10.1039/c1cp21206k.
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Abstract: Employing a two-stage cryogenic buffer gas cell, we produce a cold, hydrodynamically extracted beam of calcium monohydride molecules with a near effusive velocity distribution. Beam dynamics, thermalization and slowing are studied using laser spectroscopy. The key to this hybrid, effusive-like beam source is a ‘‘slowing cell’’ placed immediately after a hydrodynamic, cryogenic source [Patterson et al., J. Chem. Phys., 2007, 126, 154307]. The resulting CaH beams are created in two regimes. In one regime, a modestly boosted beam has a forward velocity of vf=65ms-1, a narrow velocity spread, and a flux of 109 molecules per pulse. In the other regime, our slowest beam has a forward velocity of
vf=40ms-1, a longitudinal temperature of 3.6 K, and a flux of 5 x 10 8 molecules per pulse.
Published Version: doi:10.1039/c1cp21206k
Other Sources: http://arxiv.org/abs/1104.3901
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:27266714
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