Vibrational Predissociation of the He - I2 (B, v = 34) - Ne Complex: Sequential Mechanism and Direct Dissociation

  • P. Villarreal
  • S. Miret-Artés
  • J. Campos-Martínez
  • G. Delgado-Barrio
Part of the NATO ASI Series book series (NSSB, volume 227)


The competition between direct dissociation of He I 2 Ne, producing either a diatomic fragment HeNe or separated rare atoms plus I 2 and sequential processes in which a rare atom and a triatomic complex emerge in a first step, is estimated by means of quantal approximations resting on the Fermi’s Golden Rule. Assuming a non rotating I 2 molecule and restricting the rare atoms to move on a perpendicular plane to its axis, the four-body problem is reduced to an effective three-body one after a diabatic separation of the iodine vibration is performed. Bond coordinates are used to describe sequential mechanisms as well as double continuum fragmentation, while Jacobi coordinates appear as more convenient to analyse the dissociation into two diatomic, 1 2 and He — Ne,fragments.


Golden Rule Fragmentation Rate Angular Function Sequential Mechanism Direct Dissociation 
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Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • P. Villarreal
    • 1
  • S. Miret-Artés
    • 1
  • J. Campos-Martínez
    • 1
  • G. Delgado-Barrio
    • 1
  1. 1.Instituto de Estructura de la MateriaC.S.I.CMadridSpain

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