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Vector correlations in the photofragmentation of HN

The Journal of Chemical Physics, ISSN: 0021-9606, Vol: 92, Issue: 11, Page: 6548-6555
1990
  • 29
    Citations
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  • 5
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Metrics Details

  • Citations
    29
    • Citation Indexes
      29
  • Captures
    5

Article Description

Hydrazoic acid was excited to its lowest electronic excited state ÃA″ and the fragments were analyzed by high resolution Doppler spectroscopy. The NH fragment is rotationally cold, while N is strongly internally excited f, (N) = 0.48. The Λ doublets are populated statistically. The alignment of NH rotation vs the transition dipole moment of the parent is low (β≤0. 14). The vector correlation between the translational (v) and rotational (J) motion of the NH fragments is positive and increases with increasing J, indicating a preferential parallel alignment of v and J (β≃0.40). The observed correlation between the transition dipole moment of the parent and the NH( Δ) recoil velocity is negative at low NH rotations [β(J = 2) = - 0.4] and increases to positive values with increasing J. The HN distorts from a nonplanar configuration after excitation of a linear-bent electronic transition in the NNN framework, resulting in a strong N rotation and relatively weak NH rotation. The upper potential surface must be dependent on the torsional angle of the NN-NH system. © 1990 American Institute of Physics.

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