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Cosmic-Ray Tracks in Astrophysical Ices: Modeling with the Geant4-DNA Monte Carlo Toolkit

dc.contributor.authorSHINGLEDECKER, Christopher
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorINCERTI, Sébastien
dc.contributor.authorIVLEV, Alexei
dc.contributor.authorEMFIETZOGLOU, Dimitris
dc.contributor.authorKYRIAKOU, Ioanna
dc.contributor.authorVASYUNIN, Anton
dc.contributor.authorCASELLI, Paola
dc.date.issued2020-12-01
dc.identifier.issn0004-637X
dc.description.abstractEnCosmic rays are ubiquitous in interstellar environments, and their bombardment of dust-grain ice mantles is a possible driver for the formation of complex, even prebiotic molecules. Yet, critical data that are essential for accurate modeling of this phenomenon, such as the average radii of cosmic-ray tracks in amorphous solid water (ASW) remain unconstrained. It is shown that cosmic ray tracks in ASW can be approximated as a cylindrical volume with an average radius that is mostly independent of the initial particle energy. Interactions between energetic ions and both a low-density amorphous (LDA) and high-density amorphous (HDA) ice target are simulated using the Geant4-DNA Monte Carlo toolkit, which allows for tracking secondary electrons down to subexcitation energies in the material. We find the peak track core radii, r cyl , for LDA and HDA ices to be 9.9 nm and 8.4 nm, respectively-somewhat less than double the value of 5 nm often assumed in astrochemical models.
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.title.enCosmic-Ray Tracks in Astrophysical Ices: Modeling with the Geant4-DNA Monte Carlo Toolkit
dc.typeArticle de revue
dc.identifier.doi10.3847/1538-4357/abbb30
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
dc.subject.halPhysique [physics]/Physique [physics]/Physique Générale [physics.gen-ph]
dc.subject.halInformatique [cs]
dc.identifier.arxiv2010.07419
bordeaux.journalThe Astrophysical Journal
bordeaux.page189
bordeaux.volume904
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-03039403
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03039403v1
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