تقرير
Desorption of neutrals, cations and anions from core-excited amorphous solid water
| العنوان: | Desorption of neutrals, cations and anions from core-excited amorphous solid water |
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| المؤلفون: | Dupuy, R., Féraud, G., Bertin, M, Romanzin, C., Philippe, L., Putaud, T., Michaut, X., Cimino, R., Baglin, V., Fillion, J. -H. |
| المصدر: | The Journal of Chemical Physics, 152, 5, 054711 (2020) |
| سنة النشر: | 2020 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Chemical Physics |
| الوصف: | Core-excitation of water ice releases many different molecules and ions in the gas phase. Studying these desorbed species and the underlying mechanisms can provide useful information on the effects of X-ray irradiation in ice. We report a detailed study of the X-ray induced desorption of a number of neutral, cationic and anionic species from amorphous solid water. We discuss the desorption mechanisms, and the relative contributions of Auger and secondary electrons (X-ray induced Electron Stimulated Desorption) and initial excitation (\rev{direct desorption}) as well as the role of photochemistry. Anions are shown to desorb not just through processes linked with secondary electrons but also through direct dissociation of the core-excited molecule. The desorption spectra of oxygen ions (O$^+$, OH$^+$, H$_2$O$^+$, O$^-$, OH$^-$) give a new perspective on their previously reported very low desorption yields for most types of irradiation of water, showing that they mostly originate from the dissociation of photoproducts such as H$_2$O$_2$. Comment: Accepted in Journal of Chemical Physics |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.5133156 |
| URL الوصول: | http://arxiv.org/abs/2001.07095 |
| رقم الأكسشن: | edsarx.2001.07095 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.5133156 |
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