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VUV spectroscopy and photo-processing of astrochemical ices: an experimental study.
This paper reports the results of a series of experiments to explore the morphology of a variety of molecular ices using VUV spectroscopy, and findsSpectral signatures are found that may allow the morphologyof astrochemical ices to be identified. Expand
Water and astrobiology
Water is formed from two of the three most abundant elements in the universe and so is abundant in interstellar space, in our Solar System, and on Earth, where it is an essential compound for theExpand
A Combined Experimental and Theoretical Study on the Formation of the Amino Acid Glycine (NH2CH2COOH) and Its Isomer (CH3NHCOOH) in Extraterrestrial Ices
We have investigated the synthesis of the simplest aminoacid, glycine, by Galactic cosmic-ray particles inExpand
A combined experimental and computational investigation on the synthesis of acetaldehyde [CH3CHO(X 1A')] in interstellar ices
The synthetic routes to form acetaldehyde (CH3CHO(X 1 A 0 )) in extraterrestrial ices were investigated experi- mentally in a contamination-free ultrahigh vacuum scattering machine. Binary iceExpand
Understanding the kinetics and dynamics of radiation-induced reaction pathways in carbon monoxide ice at 10 K
Carbon monoxide is the second most abundant molecule on icy grains in the interstellar medium. It also exists on Pluto, Triton, comets, and possibly in other icy bodies of the outer solar system likeExpand
Mechanistical Studies on the Irradiation of Methanol in Extraterrestrial Ices
Pure ices of amorphous methanol, CH3OH(X 1A'), were irradiated at 11 K by 5 keV electrons at 100 nA for 1 hr. These energetic electrons simulate electronic energy transfer processes that occur asExpand
Binary mixtures of methanol (CH3OH) and carbon monoxide (CO) ices were irradiated at 10 K with energetic electrons to mimic the energy transfer processes that occur in the track of the trajectoriesExpand
Laboratory Studies on the Irradiation of Methane in Interstellar, Cometary, and Solar System Ices
Pure methane ices (CH4) were irradiated at 10 K with energetic electrons to mimic the energy transfer processes that occur in the track of the trajectories of MeV cosmic-ray particles. TheExpand
On the Formation of Dipeptides in Interstellar Model Ices
The hypothesis of an exogenous origin and delivery of biologically important molecules to early Earth presents an alternative route to their terrestrial in situ formation. Dipeptides like Gly-GlyExpand
Formation of Hydrogen, Oxygen, and Hydrogen Peroxide in Electron-irradiated Crystalline Water Ice
Water ice is abundant both astrophysically, for example, in molecular clouds, and in planetary systems. The Kuiper belt objects, many satellites of the outer solar system, the nuclei of comets, andExpand