Molecule formation in tenuous media: Quantum effects in spontaneous radiative association

The present report is a summary of a study, made in collaboration with P. Solomon, on the formation of interstellar molecules by radiative association and chemical reactions. The model to be discussed is limited practically to gas phase reactions in an HI region, where the principal constituents are atomic. It therefore is limited in scope and applicability. The role of the interstellar dust in this model is passive. It shields the region from radiation. Since a number of molecular species are dissociated by radiation and the extent of carbon ionization is determined by radiation, the radiation density is important in determining compositional equilibria.

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The emission spectrum due to molecule formation through radiative association

Journal of Physics Conference Series ◽

10.1088/1742-6596/548/1/012003 ◽

2014 ◽

Vol 548 ◽

pp. 012003

Author(s):

Magnus Gustafsson ◽

Gunnar Nyman

Keyword(s):

Emission Spectrum ◽

Molecule Formation ◽

Radiative Association

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Quantum effects in the formation of CH/plus/ by radiative association

The Astrophysical Journal ◽

10.1086/182181 ◽

1976 ◽

Vol 207 ◽

pp. L69 ◽

Cited By ~ 27

Author(s):

H. Abgrall ◽

A. Giusti-Suzor ◽

E. Roueff

Keyword(s):

Quantum Effects ◽

Radiative Association

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Formation of the BeH+ and BeD+ Molecules in Be+ + H/D Collisions Through Radiative Association

Frontiers in Astronomy and Space Sciences ◽

10.3389/fspas.2021.704953 ◽

2021 ◽

Vol 8 ◽

Author(s):

Péter Szabó ◽

Szabolcs Góger ◽

Magnus Gustafsson

Keyword(s):

Cross Sections ◽

Local Thermodynamic Equilibrium ◽

Kinetic Modelling ◽

Rate Coefficients ◽

Mechanical Perturbation ◽

Equilibrium Limit ◽

Molecule Formation ◽

Radiation Fields ◽

Radiative Association ◽

Strong Radiation

Cross sections and rate coefficients for the formation of BeH+ and BeD+ molecules in Be+ + H/D collisions through radiative association are calculated using quantum mechanical perturbation theory and Breit-Wigner theory. The local thermodynamic equilibrium limit of the molecule formation is also studied, since the process is also relevant in environments with high-density and/or strong radiation fields. The obtained rate coefficients may facilitate the kinetic modelling of BeH+/BeD+ production in astrochemical environments as well as the corrosion chemistry of thermonuclear fusion reactors.

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