High-resolution optical spectroscopy with a buffer-gas-cooled beam of BaH molecules

High-resolution optical spectroscopy with a buffer-gas-cooled beam of BaH molecules Barium monohydride (BaH) is an attractive candidate for extending laser cooling and trapping techniques to diatomic hydrides. The apparatus and high-resolution optical spectroscopy presented here demonstrate progress toward this goal. A cryogenic buffer-gas-cooled molecular beam of BaH was constructed and characterized. Pulsed laser ablation into cryogenic helium buffer gas delivers ∼1×1010 molecules/sr/pulse in the XΣ+2 (v′′=0,N′′=1) state of primary interest. More than 1×107 of these molecules per pulse enter the downstream science region with forward velocities below 100 m/s and transverse temperature of 0.1 K. This molecular beam enabled high-resolution optical spectra of BaH in quantum states relevant to laser slowing and cooling. The reported measurements include hyperfine structure and magnetic g factors in the XΣ+2, BΣ+2, and AΠ1/22 states. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review A American Physical Society (APS)

High-resolution optical spectroscopy with a buffer-gas-cooled beam of BaH molecules

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High-resolution optical spectroscopy with a buffer-gas-cooled beam of BaH molecules

Abstract

Barium monohydride (BaH) is an attractive candidate for extending laser cooling and trapping techniques to diatomic hydrides. The apparatus and high-resolution optical spectroscopy presented here demonstrate progress toward this goal. A cryogenic buffer-gas-cooled molecular beam of BaH was constructed and characterized. Pulsed laser ablation into cryogenic helium buffer gas delivers ∼1×1010 molecules/sr/pulse in the XΣ+2 (v′′=0,N′′=1) state of primary interest. More than 1×107 of these molecules per pulse enter the downstream science region with forward velocities below 100 m/s and transverse temperature of 0.1 K. This molecular beam enabled high-resolution optical spectra of BaH in quantum states relevant to laser slowing and cooling. The reported measurements include hyperfine structure and magnetic g factors in the XΣ+2, BΣ+2, and AΠ1/22 states.
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Publisher
American Physical Society (APS)
Copyright
Copyright © ©2017 American Physical Society
ISSN
1050-2947
eISSN
1094-1622
D.O.I.
10.1103/PhysRevA.96.022509
Publisher site
See Article on Publisher Site

Abstract

Barium monohydride (BaH) is an attractive candidate for extending laser cooling and trapping techniques to diatomic hydrides. The apparatus and high-resolution optical spectroscopy presented here demonstrate progress toward this goal. A cryogenic buffer-gas-cooled molecular beam of BaH was constructed and characterized. Pulsed laser ablation into cryogenic helium buffer gas delivers ∼1×1010 molecules/sr/pulse in the XΣ+2 (v′′=0,N′′=1) state of primary interest. More than 1×107 of these molecules per pulse enter the downstream science region with forward velocities below 100 m/s and transverse temperature of 0.1 K. This molecular beam enabled high-resolution optical spectra of BaH in quantum states relevant to laser slowing and cooling. The reported measurements include hyperfine structure and magnetic g factors in the XΣ+2, BΣ+2, and AΠ1/22 states.

Journal

Physical Review AAmerican Physical Society (APS)

Published: Aug 7, 2017

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