Destruction Rate of H3+by Low-Energy Electrons Measured in a Storage-Ring Experiment

Autor:	L. Broström, Peter Sigray, K.-G. Rensfelt, Mats Larsson, Sven Mannervik, Håkan Danared, Sheldon Datz, M. af Ugglas, J. R. Mowat, A. Filevich, Anders Källberg, G. Sundström
Rok vydání:	1994
Předmět:	Physics Reaction rate Multidisciplinary Interstellar cloud Electron Atomic physics Astrophysics::Galaxy Astrophysics Dissociative recombination Dissociation (chemistry) Charged particle Electron ionization Ion
Zdroj:	Science. 263:785-787
ISSN:	1095-9203 0036-8075
Popis:	Knowledge of the abundance of H(3)(+) is needed in interstellar and planetary atmospheric chemistry. An important destruction mechanism of H(3)(+) is low-energy electron impact followed by dissociation, but estimates of the reaction rate span several orders of magnitude. As an attempt to resolve this uncertainty, the cross section for dissociative recombination of vibrationally cold H(3)(+) has been measured with an ion storage ring down to collision energies below 1 millielectron volt. A rate coefficient of 1.15 x 10(-7) cubic centimeters per second at 300 kelvin was deduced. The cross section scaled with collision energy according to E(-1.15), giving thee rate a temperature dependence of T(-0.65).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37cc22c4ff603458c2999e244a3f36ab https://doi.org/10.1126/science.263.5148.785 Zobrazit plný text záznamu Plný text ve formátu PDF