Luminescence cross sections in the low-energy collisions of H+, H2+, and H3+ ions with H2
Institute of Experimental Physics, Faculty of Mathematics, Physics, and Informatics, University of Gdansk,
ul. Wita Stwosza 57, 80-952 Gdansk, Poland
a e-mail: email@example.com
Received in final form: 12 August 2018
Published online: 18 December 2018
Luminescence cross sections for the optical emission of molecular hydrogen in the 200–600 nm spectral range and for the atomic Balmer-β line were measured for low-energy ( ≤1 keV) H+, H2+, and H3+ ions colliding with H2 gas targets. Molecular hydrogen transitions between singlet states were observed for all the systems studied, while the emission continuum H2(a-b) and discrete spectra associated with other transitions between triplet states appeared only in the H2+ + H2 collisions, where the spin conservation rule is fulfilled. Isotopic substitutions in the H2+/D2+ + H2, D2 system show that at Elab = 1 keV, a dominant molecular luminescence mechanism is the collision-induced excitation (CIE) of the target.
Key words: Atomic and Molecular Collisions
© The Author(s) 2018. This article is published with open access at Springerlink.com
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.