Vranckx, S Loreau, J Desouter-Lecomte, M Vaeck, N Rate constants for the radiative association of He(1s3s <sup>3</sup>S) + H<sup>+</sup> (black curves), He(1s3p <sup>3</sup>P<sup>o</sup>) + H<sup>+</sup> (red curves) and He(1s3d <sup>3</sup>S) + H<sup>+</sup> (blue curves) towards the <em>b</em> <sup>3</sup>Σ<sup>+</sup> state of HeH<sup>+</sup> with (full lines) and without (dashed lines) taking the vibrational dependence of the cross sections into account <p><strong>Figure 9.</strong> Rate constants for the radiative association of He(1s3s <sup>3</sup>S) + H<sup>+</sup> (black curves), He(1s3p <sup>3</sup>P<sup>o</sup>) + H<sup>+</sup> (red curves) and He(1s3d <sup>3</sup>S) + H<sup>+</sup> (blue curves) towards the <em>b</em> <sup>3</sup>Σ<sup>+</sup> state of HeH<sup>+</sup> with (full lines) and without (dashed lines) taking the vibrational dependence of the cross sections into account.</p> <p><strong>Abstract</strong></p> <p>We illustrate some of the difficulties that may be encountered when computing photodissociation and radiative association cross sections from the same time-dependent approach based on wavepacket propagation. The total and partial photodissociation cross sections from the 33 vibrational levels of the <em>b</em> <sup>3</sup>Σ<sup>+</sup> state of HeH<sup>+</sup> towards the nine other <sup>3</sup>Σ<sup>+</sup> and 6 <sup>3</sup>Π <em>n</em> = 2, 3 higher lying electronic states are calculated, using the autocorrelation method introduced by Heller (1978 <em>J. Chem. Phys.</em> <strong>68</strong> 3891) and the method based on the asymptotic behaviour of wavepackets introduced by Balint-Kurti <em>et al</em> (1990 <em>J. Chem. Soc. Faraday Trans.</em> <strong>86</strong> 1741). The corresponding radiative association cross sections are extracted from the same calculations, and the photodissociation and radiative association rate constants are determined.</p> section;wavepacket;HeH;method;radiative association rate constants;radiative association;33 vibrational levels;chem;photodissociation;Atomic Physics;Molecular Physics 2013-07-09
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