Details

Autor(en) / Beteiligte

• Siemer, Björn
• Roling, Sebastian
• Frigge, Robert
• Hoger, Tim
• Mitzner, Rolf
• Zacharias, Helmut

Titel

Free-electron laser induced processes in thin molecular ice

Ist Teil von

• Faraday discussions, 2014, Vol.168, p.553-569

Ort / Verlag

England

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Intermolecular reactions in and on icy films on silicate and carbonaceous grains constitute a major route for the formation of new molecular constituents in interstellar molecular clouds. In more diffuse regions and in protoplanetary discs, energetic radiation can trigger reaction routes far from thermal equilibrium. As an analog of interstellar ice-covered dust grains, highly-oriented pyrolytic graphite (HOPG) covered with D 2 O, NO, and H atoms is irradiated by ultrashort XUV pulses and the desorbing ionic and neutral products are analysed. The yields of several products show a nonlinear intensity dependence and thus enable the elucidation of reaction dynamics by two-pulse correlated desorption.