Highlights Ammonia and carbon disulphide binary ice mixtures studied for the first time. Ammonia homo-dimers that was found to reorient upon annealing to 40K. Phase transition temperature was found to be 5K higher for the mixed ice. Thermal processing of the NH3 CS2 ice mixture was found to leave thio residue.
Abstract We have carried out experimental investigation on binary ice mixture containing carbon disulfide (CS2) and ammonia (NH3) ices formed at 10K. Icy films were formed in various combinations to investigate the reactivity of CS2 and NH3 molecules on cometary nucleus. In the case of NH3 ices, deposition carried out at 10K was found to contain NH3 homo-dimers that was found to reorient upon annealing to 40K. Phase transition was found to take place as the 10K ice was warmed to higher temperatures and the phase transition temperature was found to be 5K higher for the mixed ice in comparison to the layered deposits. Thermal processing of the mixed deposition of CS2 NH3 ice was found to leave thio residue, which could be ammonium dithiocarbamate that was even found to be present at 340K.
Thio residue from thermal processing of cometary ices containing carbon disulfide and ammonia
Advances in Space Research ; 58 , 3 ; 438-443
2016-04-27
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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