2017
DOI: 10.1039/c7cp01472d
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A new model of the chemistry of ionizing radiation in solids: CIRIS

Abstract: The collisions between high-energy ions and solids can result in significant physical and chemical changes to the material. These effects are potentially important for better understanding the chemistry of interstellar and planetary bodies, which are exposed to cosmic radiation and the solar wind, respectively; however, modeling such collisions on a detailed microscopic basis has thus far been largely unsuccessful. To that end, a new model, entitled CIRIS: the Chemistry of Ionizing Radiation in Solids, was cre… Show more

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Cited by 32 publications
(27 citation statements)
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“…We first simulated the irradiation of a pure O 2 ice at 5 K by 100 keV H + , following the study by Baragiola et al (1999), which has previously been successfully modeled by us using the much more detailed Monte Carlo code, CIRIS (Shingledecker et al 2017). An irradiated O 2 ice is, in many respects, an ideal system for testing simulations of radiation chemistry, given the limited number of possible neutral species, i.e.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…We first simulated the irradiation of a pure O 2 ice at 5 K by 100 keV H + , following the study by Baragiola et al (1999), which has previously been successfully modeled by us using the much more detailed Monte Carlo code, CIRIS (Shingledecker et al 2017). An irradiated O 2 ice is, in many respects, an ideal system for testing simulations of radiation chemistry, given the limited number of possible neutral species, i.e.…”
Section: Resultsmentioning
confidence: 99%
“…For the chemical network, we used the reactions listed in Table B1 of Appendix B, as well as the neutral-neutral oxygen reactions listed in Table 7 of Shingledecker et al (2017). In cases where we have been unable to find values for activation energies, we have assumed a barrier of 10 4 K, except for radical-radical reactions, which were assumed to be barrierless.…”
Section: Model and Networkmentioning
confidence: 99%
“…The APbX 3 crystalline and chemical structure of the set-18 layers has interesting properties as concern the slowing-down of the 1-MeV electron beam. As well documented since decades (for example, see references in [50][51][52]), the energy transfer from the beam electrons to the target occurs via elastic collisions with target nuclei, and, via inelastic collisions with target electrons. The elastic collisions generate vacancyinterstitials pairs via replacement collision sequences along the crystalline directions with lower threshold energy displacements [53].…”
Section: Continuous Illumination In the Ajd_fn Layersmentioning
confidence: 99%
“…In this work, we focus on the chemistry of cold cores, such as TMC- 1 We utilized the NAUTILUS-1.1 astrochemical model (Ruaud et al 2016), in which three phases are simulated, specifically, (a) the gas-phase, (b) the ice/grain-surface, and (c) the ice-mantle bulk. This distinction between the surface and bulk of the ice is helpful here, since it highlights an important aspect of solid-phase radiation chemistry, namely, that bombardment by ionizing radiation can greatly increase the chemical importance of the bulk ice, since this is the phase in which the majority of the physicochemical changes likely occur (Johnson 1990;Spinks & Woods 1990;Shingledecker et al 2017). The degree of penetration into the ice constitutes a major difference between photochemistry and radiation chemistry (Gerakines et al 2001(Gerakines et al , 2004.…”
Section: Modelmentioning
confidence: 99%