Characterization of acetonitrile ice irradiated by X-rays employing the procoda code – II. Desorption processes

Página do item simplificado
dc.contributor.authorCarvalho, Geanderson Araújo
dc.contributor.authorPilling, Sergio
dc.contributor.authorGerasimenko, Svitlana
dc.date.accessioned2025-02-12T18:14:43Z
dc.date.available2025-02-12T18:14:43Z
dc.date.issued22023
dc.description.abstractIn this work, we focus on the study of radiation-induced desorption processes that occurred in acetonitrile ice irradiated by broad-band X-rays (6 eV to 2 keV) monitored by Fourier transform infrared spectroscopy at different radiation fluences. In a previous work, we used the procoda code to derive the chemical evolution of the ice. Here, we have observed that the acetonitrile desorbed column density is at least two orders of magnitude larger than the desorbed column densities of daughter or granddaughter molecular species at chemical equilibrium stage. This indicates that total desorption column density is mainly governed by the father molecule, as also previously hypothesized in experimental studies. This occurs basically because the acetonitrile column density is larger than the other ones. In particular, at chemical equilibrium acetonitrile desorption column density represents almost 98 per cent of the total, while it is close to 1 per cent for H, CN, and CH2, the species with larger molecular desorption percentages at chemical equilibrium. Another derived quantity is what we called intrinsic desorption rate, which is a number per second for individual species. Some of the larger intrinsic desorption rates were 6.2 × 10−6 (CH3CN), 6.2 × 10−6 (CN), 5.7 × 10−6 (H), 5.7 × 10−6 (CH2), and 4.4 × 10−6 (C2N2). These results help to put constraints in astrochemical models and can also be useful to clarify some astronomical radio observations.
dc.description.physical9 p.
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.uriCNPq (#306145/2015-4, #302985/2018-2) CAPES (#PNPD/88887.368365/2019-00, #PNPD/88887.751149/2022-00)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade Tecnológica Federal do Paraná
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.bibliographicCitationCARVALHO, Geanderson Araújo; PILLING, Sergio; GERASIMENKO, Svitlana. Characterization of acetonitrile ice irradiated by X-rays employing the procoda code – II. Desorption processes. Monthly Notices of the Royal Astronomical Society, v. 527, n. 2, p. 2781-2789, 2023. Disponível em:
dc.identifier.doi10.1093/mnras/stad3315
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/569
dc.language.isoen_US
dc.publisherRoyal Astronomical Society
dc.rights.holderGeanderson Araújo Carvalho
dc.subject.keywordAstrochemistry
dc.subject.keywordMolecular processes
dc.subject.keywordSoftware: simulations
dc.subject.keywordX-rays: stars
dc.titleCharacterization of acetonitrile ice irradiated by X-rays employing the procoda code – II. Desorption processes
dc.typeArtigos de Periódicos

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
Characterization of acetonitrile ice irradiated by X-rays employing the procoda code – II. Desorption processes.pdf
Tamanho:
1.2 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