Laboratory investigation of x-ray photolysis of ethanol ice and its implication on astrophysical environments

dc.contributor.authorPilling, Sergio
dc.contributor.authorFreitas, Fabricio Moreira
dc.date.accessioned2025-02-25T20:12:06Z
dc.date.available2025-02-25T20:12:06Z
dc.date.issued22023
dc.description.abstractHere we present experimental results on the irradiation of ethanol ice (CH3CH2OH) by broadband soft X-rays to simulate the effect processing of organic-rich astrophysical ices by space radiation. This molecule was detected in the interstellar medium in molecular clouds like Sagittarius B2 and towards nebulas like Orion KL. The experiments were performed at the Brazilian Synchrotron Facility LNLS/CNPEM, at Campinas, SP. The frozen sample was analyzed in-situ by infrared spectroscopy (IR) in a simulated astrophysical environment at different radiation fluences. The results show the formation of several new molecular species such as CO2, CO, H2O, CH4, CH3(CO)CH3(acetone), and CH3COOH (acetic acid). We determined the effective destruction cross-section of ethanol (~1×10-18cm2) and the formation cross-sections of the daughter species with values between 0.5 to 3.4×10-18cm2. The chemical equilibrium phaseof ice was characterized and desorption yield induced by X-rays was determined (0.13 molecules photon-1). The result helps us to understand the photolysis induced by X-rays in organic-rich ices in space environments.
dc.description.physical12 p.
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipFinanciadora de Estudos e Projetos (Finep)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.uriFAPESP (#2009/18304-0) FINEP, CAPES and CNPq (#PQ306145/2015-4; #PQ302985/2018-2).
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.bibliographicCitationPILLING, Sergio; FREITAS, Fabricio Moreira. Laboratory investigation of x-ray photolysis of ethanol ice and its implication on astrophysical environments. Revista Univap, v. 29, n. 61, p. 1-12, 2023. Disponível em:
dc.identifier.doi10.18066/revistaunivap.v29i61.4387
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/591
dc.language.isoen_US
dc.publisherUniversidade do Vale do Paraíba
dc.rights.holderRevista Univap
dc.subject.keywordExperimental astrochemistry
dc.subject.keywordAstrophysical ices
dc.subject.keywordSynchrotron radiation
dc.titleLaboratory investigation of x-ray photolysis of ethanol ice and its implication on astrophysical environments
dc.title.alternativeFotólise de gelo de etanol por raios-x e suas implicações em ambientes astrofísicos
dc.typeArtigos de Periódicos

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