89 citations · 500 across the 14 of their papers we have counts for
14 papers
Formation of nitriles and isonitriles by the heavy-ion irradiation of propionitrile in N2-rich astrophysical ices
Ana L. F. de Barros, David Dubois, Sreeja Raghunandanan +4
Context. Nitriles are key nitrogen-bearing organic molecules in dense clouds, star-forming regions, and nitrogen-rich icy environments. Understanding their stability and chemical e…
Single and double -shell vacancy production in slow Xe-Xe collisions
P. -M. Hillenbrand, S. Hagmann, Y. S. Kozhedub +23
We present an experimental and theoretical study of symmetric collisions at 50, 30, and 15 MeV/u, corresponding to strong perturbations with $v_K/v_…
Cosmic ray sputtering yield of interstellar ice mantles: CO and CO2 ice thickness dependence
E. Dartois, M. Chabot, T. Id Barkach +4
Cosmic-ray-induced sputtering is one of the important desorption mechanisms at work in astrophysical environments. The chemical evolution observed in high-density regions, from den…
Non-thermal desorption of complex organic molecules: Cosmic-ray sputtering of CH3OH embedded in CO2 ice
E. Dartois, M. Chabot, A. Bacmann +3
Methanol ice is embedded in interstellar ice mantles present in dense molecular clouds. We aim to measure the sputtering efficiencies starting from different ice mantles of varying…
Cosmic ray sputtering yield of interstellar H2O ice mantles : Ice mantle thickness dependence
E. Dartois, M. Chabot, T. Id Barkach +5
Interstellar grain mantles present in dense interstellar clouds are in constant exchange with the gas phase via accretion and desorption mechanisms such as UV, X-ray photodesorptio…
Chemical reactions in the nitrogen-acetone ice induced by cosmic ray analogs: relevance for the Solar System
A. L. F. de Barros, D. P. P. Andrade, E. F. da Silveira +3
The radiolysis of a nitrogen-acetone mixture, condensed at 11 K, by 40 MeV Ni ions is studied. These results are representative of studies concerning solar system ob…
Thermal and energetic processing of astrophysical ice analogues rich in SO
Z. Kanuchova, Ph. Boduch, A. Domaracka +3
Sulfur is an abundant element in the cosmos and it is thus an important contributor to astrochemistry in the interstellar medium and in the Solar System. Astronomical observations…
Infrared complex refractive index of astrophysical ices exposed to cosmic rays simulated in the laboratory
W. R. M. Rocha, S. Pilling, A. L. F. de Barros +3
In dense and cold regions of the interstellar medium (ISM), molecules may be adsorbed onto dust grains to form the ice mantles. Once formed, they can be processed by ionizing radia…
Heavy ion irradiation of crystalline water ice
E. Dartois, B. Augé, P. Boduch +9
Under cosmic irradiation, the interstellar water ice mantles evolve towards a compact amorphous state. Crystalline ice amorphisation was previously monitored mainly in the keV to h…
Processing of formic acid-containing ice by heavy and energetic cosmic ray analogues
A. Bergantini, S. Pilling, H. Rothard +2
Formic acid (HCOOH) has been extensively detected in space environments, including interstellar medium (gas and grains), comets and meteorites. Such environments are often subjecte…
Comparison of UV and high-energy ion irradiation of methanol:ammonia ice
G. M. Munoz Caro, E. Dartois, P. Boduch +3
The main goal of this work is to compare the effects induced in ices of astrophysical relevance by high-energy ions, simulating cosmic rays, and by vacuum ultraviolet (UV) photons.…
Radiolysis of Amino Acids by Heavy and Energetic Cosmic Ray Analogs in Simulated Space Environments: -Glycine Zwitterion Form
Williamary Portugal, Sergio Pilling, Philippe Boduch +2
In this work, we studied the stability of the glycine molecule in the crystalline zwitterion form, known as α-glycine (NHCHCOO) under action of heavy cosmic…
Formation of unsaturated hydrocarbons in interstellar ice analogs by cosmic rays
S. Pilling, D. P. P. Andrade, E. F. da Silveira +3
The formation of double and triple C-C bonds from the processing of pure c-C6H12 (cyclohexane) and mixed H2O:NH3:c-C6H12 (1:0.3:0.7) ices by highly-charged, and energetic ions (219…
Radiolysis of H2O:CO2 ices by heavy energetic cosmic ray analogs
S. Pilling, E. Seperuelo Duarte, A. Domaracka +3
An experimental study on the interaction of heavy, highly charged, and energetic ions (52 MeV Ni^13+) with pure H2O, pure CO2 and mixed H2O:CO2 astrophysical ice analogs is present…