Chemistry induced by low-energy electrons in condensed multilayers of ammonia and carbon dioxide.
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.
Bertin
M
M
Univ Paris-Sud, UMR 8625, Laboratoire des Collisions Atomiques et Moléculaires (FR LUMAT), Orsay, F-91405, France.
Martin
I
I
Duvernay
F
F
Theule
P
P
Bossa
J B
JB
Borget
F
F
Illenberger
E
E
Lafosse
A
A
Chiavassa
T
T
Azria
R
R