Abdoulanziz, A;
Colboc, F;
Little, DA;
Moulane, Y;
Mezei, JZ;
Roueff, E;
Tennyson, J;
... Laporta, V; + view all
(2018)
Theoretical study of ArH+ dissociative recombination and electron-impact vibrational excitation.
Monthly Notices of the Royal Astronomical Society
, 479
(2)
pp. 2415-2420.
10.1093/mnras/sty1549.
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Abstract
Cross-sections are presented for dissociative recombination and electron-impact vibrational excitation of the ArH+ molecular ion at electron energies appropriate for the interstellar environment. The R-matrix method is employed to determine the molecular structure data, i.e. the position and width of the resonance states. The cross-sections and the corresponding Maxwellian rate coefficients are computed using a method based on the Multichannel Quantum Defect Theory. The main result of the paper is the very low dissociative recombination rate found at temperatures below 1000K. This is in agreement with the previous upper limit measurement in merged beams and offers a realistic explanation for the presence of ArH+ in exotic interstellar conditions.
| Type: | Article |
|---|---|
| Title: | Theoretical study of ArH+ dissociative recombination and electron-impact vibrational excitation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/sty1549 |
| Publisher version: | https://doi.org/10.1093/mnras/sty1549 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, interstellar medium, molecular processes, RYDBERG STATES, CRAB-NEBULA, R-MATRIX |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10050802 |
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