State-to-State Inelastic Scattering of O2 with Helium
| Autor: | Yulia N. Kalugina, Roy Scheidsbach, George van Oevelen, David H. Parker, François Lique, Chandan Kumar Bishwakarma |
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| Přispěvatelé: | Laboratoire Ondes et Milieux Complexes (LOMC), Centre National de la Recherche Scientifique (CNRS)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Normandie Université (NU) |
| Rok vydání: | 2016 |
| Předmět: |
[PHYS]Physics [physics]
education.field_of_study 010304 chemical physics Population chemistry.chemical_element Inelastic scattering 010402 general chemistry 01 natural sciences 7. Clean energy 0104 chemical sciences Crossed molecular beam chemistry Ionization Excited state 0103 physical sciences Molecular and Laser Physics Physical and Theoretical Chemistry Atomic physics education ComputingMilieux_MISCELLANEOUS Beam (structure) Helium Excitation |
| Zdroj: | Journal of Physical Chemistry A Journal of Physical Chemistry A, American Chemical Society, 2016, 120 (6), pp.868-874. ⟨10.1021/acs.jpca.6b00817⟩ The Journal of Physical Chemistry A, 120, 868-874 The Journal of Physical Chemistry A, 120, 6, pp. 868-874 |
| ISSN: | 1520-5215 1089-5639 |
| DOI: | 10.1021/acs.jpca.6b00817 |
| Popis: | Molecular oxygen (O2) is extremely important for a wide variety of processes on and outside Earth. Indeed, O2–He collisions are crucial to model O2 abundance in space or to create ultracold O2 molecules. A crossed molecular beam experiment to probe rotational excitation of O2 due to helium collisions at energies of 660 cm–1 is reported. Velocity map imaging was combined with state-selective detection of O2(X3Σg–) by (2+1) resonance-enhanced multiphoton ionization. The obtained raw O2+ images were corrected from density to flux and the differential cross sections (DCS) were then extracted for six O2 final states. Exact quantum mechanical calculations were also performed. A very good agreement between experimental and theoretical DCSs was found by using an initial O2 beam population ratio of 80% for the first rotational state and 20% for the first excited state. The agreement demonstrates our ability to model inelastic processes between O2 molecules and rare gas both theoretically and experimentally. |
| Databáze: | OpenAIRE |
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