title: Flowing-afterglow study of electron-ion recombination of para-H3(+) and ortho-H3(+) ions at temperatures from 60 K to 300 K.
abstract: Detailed measurements employing a combination of a cryogenic flowing afterglow with Langmuir probe (Cryo-FALP II) and a stationary afterglow with near-infrared absorption spectroscopy (SA-CRDS) show that binary electron recombination of para-H3(+) and ortho-H3(+) ions occurs with significantly different rate coefficients, (p)αbin and (o)αbin, especially at very low temperatures. The measurements cover temperatures from 60 K to 300 K. At the lowest temperature of 60 K, recombination of para-H3(+) is at least three times faster than that of ortho-H3(+) ((p)αbin=(1.8±0.4)×10(-7) cm(3) s(-1) vs. (o)αbin=(0-0 (+5))×10(-8) cm(3) s(-1)).
authors.affiliation: Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic.
authors.forename: Michal
authors.initials: M
authors.lastname: Hejduk
authors.affiliation: Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic.
authors.forename: Petr
authors.initials: P
authors.lastname: Dohnal
authors.affiliation: Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic.
authors.forename: Peter
authors.initials: P
authors.lastname: Rubovič
authors.affiliation: Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic.
authors.forename: Ábel
authors.initials: Á
authors.lastname: Kálosi
authors.affiliation: Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic.
authors.forename: Radek
authors.initials: R
authors.lastname: Plašil
authors.affiliation: Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
authors.forename: Rainer
authors.initials: R
authors.lastname: Johnsen
authors.affiliation: Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic.
authors.forename: Juraj
authors.initials: J
authors.lastname: Glosík