Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement
Many solar system objects, such as planets and their satellites, dust grains in rings, and comets, are known to either be made of ices or to have icy surfaces. These ices are exposed to ionizing radiation including keV, MeV and GeV ions from solar wind or cosmic rays. Moreover, icy dust grains are...
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| Дата: | 2012 |
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| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2012
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| Назва видання: | Физика низких температур |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement / A.L.F. de Barros, P. Boduch, A. Domaracka, H. Rothard, E.F. da Silveira // Физика низких температур. — 2012. — Т. 38, № 8. — С. 953-960. — Бібліогр.: 44 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1174312017-05-24T03:04:39Z Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement de Barros, A.L.F. Boduch, P. Domaracka, A. Rothard, H. da Silveira, E.F. Low Temperature Spectroscopy and Radiation Effects Many solar system objects, such as planets and their satellites, dust grains in rings, and comets, are known to either be made of ices or to have icy surfaces. These ices are exposed to ionizing radiation including keV, MeV and GeV ions from solar wind or cosmic rays. Moreover, icy dust grains are present in interstellar space and in particular in dense molecular clouds. Radiation effects include radiolysis (the destruction of molecules leading to formation of radicals), the formation of new molecules following radiolysis, the desorption or sputtering of atoms or molecules from the surface, compaction of porous ices, and phase changes. This review discusses the application of infrared spectroscopy FTIR to study the evolution of the chemical composition of ices containing the most abundant molecular species found in the solar system and interstellar medium, such as H₂O, CO, CO₂ and hydrocarbons. We focus on the evolution of chemical composition with ion fluence in order to deduce the corresponding destruction and formation cross sections. Although initial approach focused on product identification, it became increasingly necessary to work toward a comprehensive understanding of ice chemistry. The abundances of these molecules in different phases of ice mantles provide important clues to the chemical processes in dense interstellar clouds, and therefore it is of importance to accurately measure the quantities such as dissociation and formation cross sections of the infrared features of these molecules. We also are able to obtain the scaling of these cross sections with deposited energy. 2012 Article Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement / A.L.F. de Barros, P. Boduch, A. Domaracka, H. Rothard, E.F. da Silveira // Физика низких температур. — 2012. — Т. 38, № 8. — С. 953-960. — Бібліогр.: 44 назв. — англ. 0132-6414 PACS: 34.50.–s, 61.80.–x, 33.20.Ea, 82.30.Fi http://dspace.nbuv.gov.ua/handle/123456789/117431 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Low Temperature Spectroscopy and Radiation Effects Low Temperature Spectroscopy and Radiation Effects |
| spellingShingle |
Low Temperature Spectroscopy and Radiation Effects Low Temperature Spectroscopy and Radiation Effects de Barros, A.L.F. Boduch, P. Domaracka, A. Rothard, H. da Silveira, E.F. Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement Физика низких температур |
| description |
Many solar system objects, such as planets and their satellites, dust grains in rings, and comets, are known to
either be made of ices or to have icy surfaces. These ices are exposed to ionizing radiation including keV, MeV
and GeV ions from solar wind or cosmic rays. Moreover, icy dust grains are present in interstellar space and
in particular in dense molecular clouds. Radiation effects include radiolysis (the destruction of molecules leading
to formation of radicals), the formation of new molecules following radiolysis, the desorption or sputtering of
atoms or molecules from the surface, compaction of porous ices, and phase changes. This review discusses the
application of infrared spectroscopy FTIR to study the evolution of the chemical composition of ices containing
the most abundant molecular species found in the solar system and interstellar medium, such as H₂O, CO, CO₂
and hydrocarbons. We focus on the evolution of chemical composition with ion fluence in order to deduce the
corresponding destruction and formation cross sections. Although initial approach focused on product identification,
it became increasingly necessary to work toward a comprehensive understanding of ice chemistry. The
abundances of these molecules in different phases of ice mantles provide important clues to the chemical processes
in dense interstellar clouds, and therefore it is of importance to accurately measure the quantities such as
dissociation and formation cross sections of the infrared features of these molecules. We also are able to obtain
the scaling of these cross sections with deposited energy. |
| format |
Article |
| author |
de Barros, A.L.F. Boduch, P. Domaracka, A. Rothard, H. da Silveira, E.F. |
| author_facet |
de Barros, A.L.F. Boduch, P. Domaracka, A. Rothard, H. da Silveira, E.F. |
| author_sort |
de Barros, A.L.F. |
| title |
Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement |
| title_short |
Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement |
| title_full |
Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement |
| title_fullStr |
Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement |
| title_full_unstemmed |
Radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement |
| title_sort |
radiolysis of astrophysical ices by heavy ion irradiation: destruction cross section measurement |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2012 |
| topic_facet |
Low Temperature Spectroscopy and Radiation Effects |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/117431 |
| citation_txt |
Radiolysis of astrophysical ices by heavy ion irradiation:
destruction cross section measurement / A.L.F. de Barros, P. Boduch, A. Domaracka, H. Rothard, E.F. da Silveira // Физика низких температур. — 2012. — Т. 38, № 8. — С. 953-960. — Бібліогр.: 44 назв. — англ. |
| series |
Физика низких температур |
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2023-10-18T20:29:46Z |
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