Abstract
Vibrational relaxation of strontium monohydroxide (SrOH) molecules in collisions with helium (He) at 2 K is studied. We find the diffusion cross section of SrOH at 2.2 K to be and the vibrational quenching cross section for the (100) Sr–O stretching mode to be . The resulting ratio is more than an order of magnitude smaller than for previously studied few-atom radicals (Au et al 2014 Phys. Rev. A 90 032703 ). We also determine the Franck–Condon factor for SrOH () to be .
Highlights
The study and control of cold atom–molecule collisions lies at the interface of physics and chemistry [1,2,3]
We explore inelastic collisions between strontium monohydroxide (SrOH) and helium (4He) at 2.2 K
( ) measured value of σd SrOH − 4He agrees with the theoretical prediction for larger polyatomic molecules colliding with helium [31]
Summary
Vibrational relaxation of strontium monohydroxide (SrOH) molecules in collisions with helium (He) at Commons Attribution 3.0 licence. Any further distribution of the vibrational quenching cross section for the (100) Sr–O stretching mode to be this work must maintain attribution to the σq = (7 ± 2) × 10−17cm. The resulting ratio γ100 = σd σq ∼ 700 is more than an order of magnitude author(s) and the title of the work, journal citation smaller than for previously studied few-atom radicals
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