| Autor: |
Ivan Kozyryev, Louis Baum, Kyle Matsuda, Peter Olson, Boerge Hemmerling, John M Doyle |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
New Journal of Physics, Vol 17, Iss 4, p 045003 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
1367-2630 |
| DOI: |
10.1088/1367-2630/17/4/045003 |
| Popis: |
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 ${{\sigma }_{{\rm d}}}=(5\pm 2)\times {{10}^{-14}}\;{\rm c}{{{\rm m}}^{2}}$ and the vibrational quenching cross section for the (100) Sr–O stretching mode to be ${{\sigma }_{{\rm q}}}$ $\;=\;(7\pm 2)\times {{10}^{-17}}{\rm c}{{{\rm m}}^{2}}$ . The resulting ratio ${{\gamma }_{100}}$ $\;=\;{{\sigma }_{{\rm d}}}/{{\sigma }_{{\rm q}}}\sim 700$ is more than an order of magnitude smaller than for previously studied few-atom radicals (Au et al 2014 Phys. Rev. A http://dx.doi.org/10.1103/PhysRevA.90.032703 90 http://dx.doi.org/10.1103/PhysRevA.90.032703 ). We also determine the Franck–Condon factor for SrOH ( ${{\tilde{A}}^{2}}{{\Pi }_{1/2}}(100)\leftarrow {{\tilde{X}}^{2}}{{\Sigma }^{+}}(000)$ ) to be $(4.8\pm 0.8)\times {{10}^{-2}}$ . |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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