Magnetic trapping of SH radicals

Eardley, J.S.; Warner, N.; Deng, L.; Carty, D.; Wrede, E.

Abstract

Magnetic trapping of SH radicals, produced via the photostop technique, has been demonstrated. H2S in a skimmed, supersonic molecular beam was photodissociated at 212.8 nm to produce SH inside a 330 mK deep static magnetic trap. The molecular-beam speed was controlled by the mixing ratio of H2S in Kr to match the recoil velocity of the SH photofragments such that some SH radicals were produced with near-zero laboratory-frame velocity. The density of SH radicals in the 2Π3/2, v = 0, J = 3/2 state was followed by (2+1) REMPI over seven orders of magnitude of signal intensity. 5 ms after photodissociation, SH radicals moving faster than the capture velocity of 13 m/s had left the trap. The 1/e trap lifetime of the remaining SH radicals was 40 ± 10 ms at an estimated density of 5E4 molecules/cm3. Photostop offers a simple and direct way to accumulate absolute ground state molecules in a variety of traps.

Citation

Eardley, J., Warner, N., Deng, L., Carty, D., & Wrede, E. (2017). Magnetic trapping of SH radicals. Physical Chemistry Chemical Physics, 19(12), 8423-8427. https://doi.org/10.1039/c7cp00458c

• Journal Article Type: Article
• Acceptance Date: Mar 2, 2017
• Online Publication Date: Mar 2, 2017
• Publication Date: Mar 28, 2017
• Deposit Date: Mar 16, 2017
• Publicly Available Date: Mar 2, 2018
• Journal: Physical Chemistry Chemical Physics
• Print ISSN: 1463-9076
• Electronic ISSN: 1463-9084
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 19
• Issue: 12
• Pages: 8423-8427
• DOI: https://doi.org/10.1039/c7cp00458c
• Keywords: Cold molecules, Magnetic trapping.