Journal
NEW JOURNAL OF PHYSICS
Volume 17, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/17/4/045003
Keywords
buffer-gas cooling; vibrational quenching; cold polyatomic molecules
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Funding
- NSF
- Division Of Physics
- Direct For Mathematical & Physical Scien [1505961] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1125846] Funding Source: National Science Foundation
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Vibrational relaxation of strontium monohydroxide (SrOH) molecules in collisions with helium (He) at 2K is studied. We find the diffusion cross section of SrOH at 2.2 K to be sigma(d) = (5 +/- 2) x 10(-14) cm(2) and the vibrational quenching cross section for the (100) Sr-O stretching mode to be sigma(q) = (7 +/- 2) x 10(-17) cm(2). The resulting ratio gamma(100) = sigma(d)/sigma(q) similar to 700 is more than an order of magnitude smaller than for previously studied few-atom radicals (Au et al 2014 Phys. Rev. A90 032703). We also determine the Franck-Condon factor for SrOH ((A) over tilde (2) Pi(1/2) (100) <- (X) over tilde (2) Sigma(+) (000)) to be (4.8 +/- 0.8) x 10(-2).
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