1. Space weathering on inner planetary surface analogues induced by swift multicharged heavy ion bombardment
- Author
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Martinez, R., Agnihotri, A., da Silveira, E.F., Palumbo, M.E., Strazzulla, G., Boduch, P., Domaracka, Alicja, Rothard, H., Matériaux, Défauts et IRradiations (MADIR), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Atomes, Molécules et Agrégats (AMA)
- Subjects
[PHYS]Physics [physics] ,Atmospheres ,Solar wind ,Impact processes ,Space Weathering ,Sputtering ,Astronomy and Astrophysics ,Mercury ,Space and Planetary Science ,evolution Silicate Irradiation ,Energetic Heavy Ions ,surface ,Planetary surfaces ,Moon ,Cosmic rays - Abstract
International audience; Silicates are ubiquitous in space. They dominate the surfaces of the inner rocky planets (Mercury in the case of the Solar System), the Moon, and asteroids, forming the major part of the non-volatile material. The physical and chemical properties of the rocky surfaces are determined not only by their initial composition but also by the processes occurring on them. Here we discuss one of these processes; irradiation by energetic cosmic particles that induces many effects among which structural changes and sputtering, the latter contributing to the formation of exospheres. In the current work we report the results of experiments conducted on anorthite, jadeite and nepheline silicates that have been irradiated with energetic heavy ions with the aim to better understand the interaction of galactic cosmic rays, solar wind, and solar energetic particles with planetary and small body surfaces. The sputtering effects induced by energetic (MeV/u) multicharged heavy ions (e.g., 105 Rh and 140 Ba) were analyzed by the PDMS-TOF-SIMS technique (plasma desorption mass spectrometry-time-of-flight secondary ion mass spectrometry). Positive and negative secondary ionic species are identified: Na + , K + , Al + , Ca + , SiO2-. Ejection of (SiO2)nand (AlSi)Omcluster series are also observed. Less frequent, negative ion yields are one order of magnitude less than positive ones, or greater, which is the case for nepheline, with 0.671 ions impact-1 for positive and 0.126 ions impact-1 for negative ions. The results concerning ejection of ionic species show, for instance, that the Na + /K + ratio is ~2.5, which is in very good agreement with that observed in the Hermean exosphere found to be ~2.3.
- Published
- 2022