Dartois, E. ; Chabot, M. ; Pino, T. ; Béroff, K. ; Godard, M. ; Severin, D. ; Bender, M. ; Trautmann, C. (2017)
Swift heavy ion irradiation of interstellar dust analogues.
In: Astronomy & Astrophysics, 599
doi: 10.1051/0004-6361/201629646
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Context. Interstellar dust grain particles are immersed in vacuum ultraviolet (VUV) and cosmic ray radiation environments influencing their physicochemical composition. Owing to the energetic ionizing interactions, carbonaceous dust particles release fragments that have direct impact on the gas phase chemistry.
Aims. The exposure of carbonaceous dust analogues to cosmic rays is simulated in the laboratory by irradiating films of hydrogenated amorphous carbon interstellar analogues with energetic ions. New species formed and released into the gas phase are explored.
Methods. Thin carbonaceous interstellar dust analogues were irradiated with gold (950 MeV), xenon (630 MeV), and carbon (43 MeV) ions at the GSI UNILAC accelerator. The evolution of the dust analogues is monitored in situ as a function of fluence at 40, 100, and 300 K. Effects on the solid phase are studied by means of infrared spectroscopy complemented by simultaneously recording mass spectrometry of species released into the gas phase.
Results. Specific species produced and released under the ion beam are analyzed. Cross sections derived from ion-solid interaction processes are implemented in an astrophysical context.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Dartois, E. ; Chabot, M. ; Pino, T. ; Béroff, K. ; Godard, M. ; Severin, D. ; Bender, M. ; Trautmann, C. |
| Art des Eintrags: | Bibliographie |
| Titel: | Swift heavy ion irradiation of interstellar dust analogues |
| Sprache: | Englisch |
| Publikationsjahr: | März 2017 |
| Verlag: | A & A |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Astronomy & Astrophysics |
| Jahrgang/Volume einer Zeitschrift: | 599 |
| DOI: | 10.1051/0004-6361/201629646 |
| URL / URN: | https://doi.org/10.1051/0004-6361/201629646 |
| Kurzbeschreibung (Abstract): | Context. Interstellar dust grain particles are immersed in vacuum ultraviolet (VUV) and cosmic ray radiation environments influencing their physicochemical composition. Owing to the energetic ionizing interactions, carbonaceous dust particles release fragments that have direct impact on the gas phase chemistry. Aims. The exposure of carbonaceous dust analogues to cosmic rays is simulated in the laboratory by irradiating films of hydrogenated amorphous carbon interstellar analogues with energetic ions. New species formed and released into the gas phase are explored. Methods. Thin carbonaceous interstellar dust analogues were irradiated with gold (950 MeV), xenon (630 MeV), and carbon (43 MeV) ions at the GSI UNILAC accelerator. The evolution of the dust analogues is monitored in situ as a function of fluence at 40, 100, and 300 K. Effects on the solid phase are studied by means of infrared spectroscopy complemented by simultaneously recording mass spectrometry of species released into the gas phase. Results. Specific species produced and released under the ion beam are analyzed. Cross sections derived from ion-solid interaction processes are implemented in an astrophysical context. |
| Freie Schlagworte: | astrochemistry, cosmic rays, dust, extinction, Evolution, solid state: refractory, methods: laboratory: solid state |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Ionenstrahlmodifizierte Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 29 Dez 2017 09:52 |
| Letzte Änderung: | 29 Dez 2017 09:52 |
| PPN: | |
| Sponsoren: | Part of this work has been financed by the French INSU-CNRS program “Physique et Chimie du Milieu Interstellaire” (PCMI). |
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