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Surface-enhanced nuclear spin conversion in CH3F |
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| Authors: | Marcela Tudorie Patrice Cacciani |
| Institution: | Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523, Centre d’Etudes et de Recherches Laser et Applications, FR CNRS 2416, Université des Sciences et Technologies de Lille, Bâtiment P5, 59655 Villeneuve d’Ascq Cedex, France |
| Abstract: | The nuclear spin conversion of a molecule is the modification of the total nuclear spin I of its equivalent atoms. This phenomenon is observed by measuring the relaxation rate of a gas sample initially prepared with a population of spin isomers far from the equilibrium given by nuclear spin statistics. New experimental data obtained at low pressure show a surface-induced enhancement of the nuclear spin conversion in 13CH3F. Contrary to binary collisions in the gas phase, hitting the surface induces direct conversion. Several mechanisms are proposed. |
| Keywords: | Solid-gas interfaces Molecular dynamics Quantum effects Glass and gold surfaces Nuclear spin conversion |
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