title: Chemistry induced by low-energy electrons in condensed multilayers of ammonia and carbon dioxide.
abstract: We have investigated by means of HREEL spectroscopy electron induced reactivity in a binary CO2 : NH3 ice mixture. It was shown that the interaction of low energy electrons (9-20 eV) with such mixtures induces the synthesis of neutral carbamic acid NH2COOH and that flashing the sample at 140 K induces the formation of ammonium carbamate. The products have been assigned by FTIR spectroscopy of a CO2 : NH3 mixture heated from 10 K to 240 K. A mechanism involving dissociation of NH3 molecules into NH2* and H* radicals is proposed to explain the product formation.
authors.affiliation: Univ Paris-Sud, UMR 8625, Laboratoire des Collisions Atomiques et Moléculaires (FR LUMAT), Orsay, F-91405, France.
authors.forename: M
authors.initials: M
authors.lastname: Bertin
authors.forename: I
authors.initials: I
authors.lastname: Martin
authors.forename: F
authors.initials: F
authors.lastname: Duvernay
authors.forename: P
authors.initials: P
authors.lastname: Theule
authors.forename: J B
authors.initials: JB
authors.lastname: Bossa
authors.forename: F
authors.initials: F
authors.lastname: Borget
authors.forename: E
authors.initials: E
authors.lastname: Illenberger
authors.forename: A
authors.initials: A
authors.lastname: Lafosse
authors.forename: T
authors.initials: T
authors.lastname: Chiavassa
authors.forename: R
authors.initials: R
authors.lastname: Azria