Dynamics of the B and A states of chlorine by laser induced fluorescence

  1. Martinez, E. 1
  2. Basterrechea, F.J. 1
  3. Cabanas, B. 1
  4. Puyuelo, P. 2
  5. Lopez, M.R. 1
  1. 1 Universidad de Castilla-La Mancha
    info

    Universidad de Castilla-La Mancha

    Ciudad Real, España

    ROR https://ror.org/05r78ng12

  2. 2 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

Revue:
Laser Chemistry Print

ISSN: 0278-6273

Année de publication: 1992

Volumen: 12

Número: 1-2

Pages: 275-284

Type: Article

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Résumé

Chlorine B 3∏(0u +) state lifetimes have been measured by laser-induced fluorescence in several predissociated (v′ = 14-19, 21) and non-predissociated (v′ = 5-12) levels. Trial and error Franck-Condon calculations have been performed to check the nature and position of the predissociating state. The results have been used to give a value of Re for the A 3∏(1u) state responsible for predissociation, Re = 2.48 ± 0.01 angstrom. The obtained data show that interference effects due to crossing between B and A states modify the lifetimes of the B state appreciably. The inadequacy of the low-lying vibrational levels region, i.e. v′ < 8, to measure the radiative lifetime of the B state (τR(B)) is shown. Previous values for τR(B) can therefore be affected by considerable errors.