Cold collisions in a molecular synchrotron
| Autor: | Jérôme Loreau, Ad van der Avoird, Aernout P. P. van der Poel, Peter C. Zieger, Sebastiaan Y. T. van de Meerakker, Hendrick L. Bethlem |
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| Přispěvatelé: | Atoms, Molecules, Lasers, LaserLaB - Physics of Light |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
FOS: Physical sciences
Physique atomique et moléculaire General Physics and Astronomy chemistry.chemical_element 02 engineering and technology 01 natural sciences law.invention Physico-chimie générale law Physics - Chemical Physics 0103 physical sciences Physics::Atomic and Molecular Clusters Molecule SDG 7 - Affordable and Clean Energy Sensitivity (control systems) Physics::Chemical Physics Theoretical Chemistry 010306 general physics Chemical Physics (physics.chem-ph) Physics Range (particle radiation) Argon Scattering Spectroscopy of Cold Molecules 021001 nanoscience & nanotechnology Synchrotron chemistry Deuterium ComputingMethodologies_DOCUMENTANDTEXTPROCESSING Molecular and Laser Physics Atomic physics 0210 nano-technology Energy (signal processing) |
| Zdroj: | Physical Review Letters, 120(3):033402, 1-5. American Physical Society Van Der Poel, A P P, Zieger, P C, Van De Meerakker, S Y T, Loreau, J, Van Der Avoird, A & Bethlem, H L 2018, ' Cold Collisions in a Molecular Synchrotron ', Physical Review Letters, vol. 120, no. 3, 033402, pp. 1-5 . https://doi.org/10.1103/PhysRevLett.120.033402 Physical review letters, 120 Physical Review Letters, 120, pp. 1-5 Physical Review Letters Physical Review Letters, 120, 1-5 |
| ISSN: | 0031-9007 |
| DOI: | 10.1103/PhysRevLett.120.033402 |
| Popis: | We study collisions between neutral, deuterated ammonia molecules (ND3) stored in a 50 cm diameter synchrotron and argon atoms in copropagating supersonic beams. The advantages of using a synchrotron in collision studies are twofold: (i) By storing ammonia molecules many round-Trips, the sensitivity to collisions is greatly enhanced; (ii) the collision partners move in the same direction as the stored molecules, resulting in low collision energies. We tune the collision energy in three different ways: by varying the velocity of the stored ammonia packets, by varying the temperature of the pulsed valve that releases the argon atoms, and by varying the timing between the supersonic argon beam and the stored ammonia packets. These give consistent results. We determine the relative, total, integrated cross section for ND3+Ar collisions in the energy range of 40-140 cm-1, with a resolution of 5-10 cm-1 and an uncertainty of 7%-15%. Our measurements are in good agreement with theoretical scattering calculations. SCOPUS: ar.j info:eu-repo/semantics/published |
| Databáze: | OpenAIRE |
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