{
  "abstract": "Swift heavy ion irradiation of pure CH 3 CN ice was investigated to evaluate the influence of the initial ice morphology on its radiolytic evolution under astrophysically relevant conditions. Two deposition protocols were compared: (i) CH 3 CN ice deposited and irradiated at 50 K, and (ii) CH 3 CN ice deposited at 130 K, subsequently cooled to 10 K prior to irradiation, thereby preserving the structural organization established during deposition. In situ FTIR spectroscopy revealed efficient destruction of CH 3 CN and the formation of HCN, HC 3 N, CH 3 NC, NH 3 , and imine-like compounds. The thermally organized ice exhibited a distinct infrared spectral evolution, enhanced destruction, and differences in the stabilization of daughter species compared with the amorphous ice. Destruction cross sections of (2.85 ± 0.52) × 10 -12 and (4.65 ± 0.43) × 10 -12 cm 2 were determined for the amorphous and thermally organized ices, respectively. These results demonstrate that the thermal history of CH 3 CN ice, through its influence on the initial ice morphology, strongly affects radical diffusion, recombination, and product formation during irradiation. The present measurements provide benchmark radiochemical data for acetonitrile and establish a basis for future investigations of more realistic nitrile-bearing astrophysical ice analogues relevant to Titan and other outer Solar System environments.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "name": "Y. Murhej"
    },
    {
      "name": "A.L.F. de Barros"
    },
    {
      "name": "R. Sreeja"
    },
    {
      "name": "D.V. Doreste"
    },
    {
      "name": "E.F. da Silveira"
    },
    {
      "name": "A.A. de Almeida"
    },
    {
      "name": "H. Rothard"
    },
    {
      "name": "Alicja Domaracka"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d8698xyh6yvgs.bib",
  "cited_by": 0,
  "doi": "10.1016/j.icarus.2026.117287",
  "fulltext_url": null,
  "id": "d8698xyh6yvgs",
  "issns": [
    "0019-1035",
    "1090-2643"
  ],
  "landing_url": "https://hal.science/hal-05742352v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "0.sdu"
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    [
      "hal",
      "1.chim.theo"
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      "hal",
      "1.phys.phys"
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      "hal",
      "1.sdu.astr"
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      "hal",
      "2.phys.phys.phys-ao-ph"
    ],
    [
      "openalex",
      "3103|Astro and Planetary Science"
    ]
  ],
  "openalex": "W7212165300",
  "pdf_url": "https://hal.science/hal-05742352/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/d8698xyh6yvgs.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:31Z",
      "native_id": "hal-05742352",
      "source": "hal",
      "url": "https://hal.science/hal-05742352v1"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "hal:1.sdu.astr",
      "subfield": "general"
    },
    {
      "field": "chemistry",
      "origin": "hal:1.chim.theo",
      "subfield": "theoretical"
    },
    {
      "field": "earth",
      "origin": "hal:2.phys.phys.phys-ao-ph",
      "subfield": "atmospheric"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Swift heavy ion processing of CH₃CN ices: Structure and implications for Titan’s lower atmosphere nitrile chemistry",
  "title_text": "Swift heavy ion processing of CH₃CN ices: Structure and implications for Titan’s lower atmosphere nitrile chemistry",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:31Z",
  "url": "https://research.draconitic.com/paper/d8698xyh6yvgs",
  "venue": "Icarus",
  "versions": []
}