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

Página do item simplificado
dc.contributor.authorFreitas, Fabricio Moreira
dc.contributor.authorPilling, Sergio
dc.date.accessioned2025-05-07T14:51:58Z
dc.date.available2025-05-07T14:51:58Z
dc.date.issued22020
dc.description.abstractMethanol (CH3OH) is one of the most abundant organic molecules in astrophysical environments. It has been found in cold regions such as surfaces of comets, ices near young stellar objects and protoplanetary disks, as well as in the gas phase in different regions in space. In this work, we experimentally simulate the methanol ice and its behavior when irradiated by broadband soft X-rays. The experiments were performed at the Brazilian Synchrotron Facility LNLS/CNPEM, employing a broadband photon beam (6 to 2000 eV). The frozen sample was analyzed in situ by infrared spectroscopy (IR) in simulated astrophysical at different radiation fluences. The results show the formation of several new species such as CO2, CO, H2O and CH4 during the photolysis CH3OH ice by soft X-rays. We determined effective destruction and formation cross-section, as well as the chemical equilibrium fluence (FE) and desorption yields. The timescale to reach chemical equilibrium in some astrophysical environments with soft X-rays were estimated. The result helps us to understand the photolysis induced by X-rays in organic-rich ices in space environments.
dc.description.physical7 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.uriCNPQ (#PQ306145/20154; #PQ302985/2018-2)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.affiliationInstituto Tecnológico da Aeronáutica
dc.identifier.bibliographicCitationFREITAS, F. M.; PILLING, S.. LABORATORY INVESTIGATION OF X-RAY PHOTOLYSIS OF METHANOL ICE AND ITS IMPLICATION ON ASTROPHYSICAL ENVIRONMENTS. Química Nova, v. 43, n. 5, p. 521–527, maio 2020. Disponível em:
dc.identifier.doi10.21577/0100-4042.20170510
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/894
dc.language.isoen_US
dc.publisherSociedade Brasileira de Química
dc.rights.holderQuímica Nova
dc.subject.keywordExperimental astrochemistry
dc.subject.keywordAstrophysical ices
dc.subject.keywordMethanol
dc.subject.keywordX-rays
dc.subject.keywordDesorption
dc.subject.keywordPhotolysis
dc.subject.keywordSynchrotron radiation
dc.titleLaboratory investigation of x-ray photolysis of methanol ice and its implication on astrophysical environments
dc.typeArtigos de Periódicos

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
Laboratory investigation of x-ray photolysis of methanol ice and its implication on astrophysical environments.pdf
Tamanho:
4 MB
Formato:
Adobe Portable Document Format
Baixar
Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar

Coleções

Produção acadêmica-PPGFA