Details

Autor(en) / Beteiligte

• Bennett, O. J.
• Dickinson, A. S.
• Leininger, T.
• Gadéa, F. X.

Titel

Radiative association in Li+H revisited: the role of quasi-bound states

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2003-05, Vol.341 (1), p.361-368

Ort / Verlag

Oxford, UK: Blackwell Science Ltd

Erscheinungsjahr

2003

Link zum Volltext

Quelle

Wiley Blackwell Single Titles

Beschreibungen/Notizen

• The role in radiative association of narrow resonances arising from quasi-bound levels is examined. For the rate coefficient the contribution from such levels is readily calculated in terms of the Einstein A-coefficient from bound rovibrational levels generated using a suitable alternative boundary condition. By locating systematically all the quasi-bound levels, an enhancement by more than an order of magnitude of the rate coefficient for Li(2s) + H(1s) association above about 600 K is obtained. The effect on the LiH abundance in the early Universe is no more than an increase of a factor of 3 for limited ranges of values of the redshift. For the Li(2p) state the effect of narrow resonances appears to have been taken into account in previous calculations.