Observation of crystallization of amorphous solid water under the conditions of secondary emission mass spectrometric experiments
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Observation of crystallization of amorphous solid water under the conditions of secondary emission mass spectrometric experiments
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| Creator |
Kosevich, M.V.
Boryak, O.A. Shelkovsky, V.S. Orlov, V.V. |
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| Subject |
Biological Systems at Low Temperatures
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| Description |
A phenomenon of termination of sputtering of protonated water clusters (H2O)nH⁺ in low-temperature secondary emission mass spectrometric studies of solid water was observed in the temperature range of crystallization of amorphous solid water (ASW). In this range the mass spectra contained only H₃O⁺, H₂O⁺•, and OH⁺ ions. The following explanation of the revealed phenomenon is suggested: the heat supplied to the ASW sample by the bombarding particles is spent on initiation of an amorphous–crystalline transition within the condensed sample but not for the transfer of the sample matter to the gas phase. At the same time heat released on crystallization causes a local rise in temperature of the crystallizing sample surface, which enhances the rate of sublimation of ice. The resulting increased concentration of subliming water molecules over the sample surface is reflected in the growth of abundance of H₂O⁺• molecular ion-radical, produced by gas-phase ionization mechanism. The appearance of a set of low-mass peaks in the course of crystallization observed for some types of ASW samples is explained by the release of gases trapped in the ASW film during its growth.
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| Date |
2018-01-14T13:08:47Z
2018-01-14T13:08:47Z 2003 |
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| Type |
Article
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| Identifier |
Observation of crystallization of amorphous solid water under the conditions of secondary emission mass spectrometric experiments / M.V. Kosevich, O.A. Boryak, V.S. Shelkovsky, V.V. Orlov // Физика низких температур. — 2003. — Т. 29, № 9-10. — С. 1061-1064. — Бібліогр.: 30 назв. — англ.
0132-6414 PACS: 68.49.Sf, 64.70.Kb, 61.43.-j, 36.40.Wa http://dspace.nbuv.gov.ua/handle/123456789/128931 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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