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    • Nuclear spin conversion in the gaseous phase in the presence of a static electric field: Intramolecular magnetic interactions and the role of collisionsPeer reviewedClosed access 

      2004, LECOINTRE, Julien; Cacciani, P.; Cosléou, F.; Herlemont, F.; Khelkhal, M., HENALLUX
      Article scientifique
      When a gaseous sample of 13CH3F is prepared with a spin-isomer population ratio (ortho and para forms) far from the equilibrium given by nuclear spin statistics, it relaxes towards this equilibrium with an exponential decay rate. This phenomenon, called nuclear spin conversion, is mainly governed by intramolecular spin-spin and spin-rotation interactions which couple two pairs of quasidegenerate ...

    • Rotational dependence of the dipole moment of 13CH3FPeer reviewedClosed access 

      2004, LECOINTRE, Julien; Cosleou, J.; Cacciani, P.; Herlemont, F.; Khelkhal, M; Pracna, P., HENALLUX
      Article scientifique
      When a gas sample of 13CH3F is prepared with a population of spin isomers far from the equilibrium given by nuclear spin statistics, it relaxes towards this equilibrium with an exponential decay rate. This rate is increased by submitting the molecules to a static electric field, emphasizing the role of the magnetic intramolecular interactions and of the collisions in the “quantum relaxation” process ...