Theoretical study of ArH+ dissociative recombination and electron-impact vibrational excitation

Autor:	Abdoulanziz, A., Colboc, F., Little, D. A., Moulane, Y., Mezei, J. Zs., Roueff, E., Tennyson, J., Schneider, I. F., Laporta, V.
Rok vydání:	2018
Předmět:	Astrophysics - Astrophysics of Galaxies Astrophysics - Solar and Stellar Astrophysics Physics - Atomic Physics
Zdroj:	MNRAS, 479, 2415-2420 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1093/mnras/sty1549
Popis:	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 to the presence of ArH+ in exotic interstellar conditions. Comment: 6 pages; 7 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1806.03966 Zobrazit plný text záznamu View this record from Arxiv