caa a22 4500 445865946 CHVBK 20180317145457.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1140/epjd/e2011-20028-1 doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-20028-1 Anomalous Doppler broadening caused by exothermic reactions: application to hydrogen Balmer lines [Elektronische Daten] [J. Loureiro, J. Amorim] The three- and one-dimensional velocity distributions of a product species created by an exothermic reaction are calculated using the energy conservation, with the aim of evaluating the impact of such processes on the anomalous broadening of Doppler lines. The calculations are performed to the reaction H 2 + + H2 → H 3 + + H, in which according to Christoffersen (1964) an amount of 1.56 eV is transferred to the product species. It is shown that the deviations relatively to Maxwell-Boltzmann distributions are significant as the internal energy defect ΔE increases, even within energies lower than 1.56 eV, and hence the profiles of excited H∗ atoms, associated with the emission of hydrogen Balmer lines, created in the sequence of H(n = 1) produced by the above reaction are not of Gaussian-type. The profiles are markedly flatter and squarer than Gaussian distributions. The validity of the species temperature determined from the full width at half maximum (FWHM) of the lines, as well as the fit of the lines by multimodal Gaussian functions, is then analyzed. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Loureiro J. Instituto de Plasmas e Fusão Nuclear-Laboratório Associado, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001, Lisboa, Portugal aut Amorim J. Laboratório Nacional de Ciência e Tecnologia do Bioetanol - CTBE, Caixa Postal 6170, CEP 13083-970, Campinas, SP, Brazil aut The European Physical Journal D Springer-Verlag 63/3(2011-08-01), 421-429 1434-6060 63:3<421 2011 63 10053 https://doi.org/10.1140/epjd/e2011-20028-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-20028-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Loureiro J. Instituto de Plasmas e Fusão Nuclear-Laboratório Associado, Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001, Lisboa, Portugal aut NATIONALLICENCE 700 1- Amorim J. Laboratório Nacional de Ciência e Tecnologia do Bioetanol - CTBE, Caixa Postal 6170, CEP 13083-970, Campinas, SP, Brazil aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 63/3(2011-08-01), 421-429 1434-6060 63:3<421 2011 63 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer