Issue |
A&A
Volume 672, April 2023
|
|
---|---|---|
Article Number | A25 | |
Number of page(s) | 7 | |
Section | Atomic, molecular, and nuclear data | |
DOI | https://doi.org/10.1051/0004-6361/202245326 | |
Published online | 28 March 2023 |
Formation of SiO+ through radiative association of Si+(3s23p 2Pu) and O(2s22p4 3Pg)
1
Optics and Thermal Radiation Research Center, Institute of Frontier and Interdisciplinary Science, Shandong University,
72 Binhai Road,
Qingdao
266237,
PR China
e-mail: z.qin@sdu.edu.cn
2
School of Energy and Power Engineering, Shandong University,
27 Shanda Nanlu,
Jinan
250061,
PR China
3
School of Energy Science and Engineering, Harbin Institute of Technology,
92 Xidazhi Street,
Harbin
150001,
PR China
Received:
29
October
2022
Accepted:
10
February
2023
We investigate the radiative association of SiO+ in the collision of a Si+(3s23p 2Pu) cation and an O(2s22p4 3Pg) atom using the quantum mechanical method, including the cross sections and rate coefficients. We consider 18 dipole-allowed radiative association processes of SiO+. The results show that the 2 2Π → A 2Π transition contributes most for the SiO+ radiative association at temperatures from 10 to 10 000 K. The 2 2Π → X 2Σ+ and 2 2Σ− → A 2Π transitions are also relatively significant at high temperatures. The total rate coefficient is found to vary from 7.72 × 10−18 to 4.92 × 10−17 cm3 s−1. Finally, an analytical function is fitted to the total rate coefficient for the convenience of astrochemical modelling. The obtained cross sections and rate coefficients are expected to be useful for modelling the Si chemistry in the diffuse interstellar medium.
Key words: astrochemistry / molecular processes / molecular data
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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