Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry
| العنوان: | Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry |
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| المؤلفون: | Kolasinski, R. D., Hammond, K. D., Whaley, J. A., Buchenauer, D. A., Wirth, B. D. |
| سنة النشر: | 2023 |
| المجموعة: | SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
| مصطلحات موضوعية: | 73 NUCLEAR PHYSICS AND RADIATION PHYSICS |
| الوصف: | In our work, we apply low energy ion beam analysis to examine directly how the adsorbed hydrogen concentration and binding configuration on W(1 0 0) depend on temperature. We exposed the tungsten surface to fluxes of both atomic and molecular H and D. We then probed the H isotopes adsorbed along different crystal directions using 1–2 keV Ne + ions. At saturation coverage, H occupies two-fold bridge sites on W(1 0 0) at 25 °C. Moreover, the H coverage dramatically changes the behavior of channeled ions, as does reconstruction of the surface W atoms. For the exposure conditions examined here, we find that surface sites remain populated with H until the surface temperature reaches 200 °C. Then, we observe H rapidly desorbing until only a residual concentration remains at 450 °C. Development of an efficient atomistic model that accurately reproduces the experimental ion energy spectra and azimuthal variation of recoiled H is underway. |
| نوع الوثيقة: | other/unknown material |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| Relation: | http://www.osti.gov/servlets/purl/1145778; https://www.osti.gov/biblio/1145778; https://doi.org/10.1016/j.jnucmat.2014.11.115 |
| DOI: | 10.1016/j.jnucmat.2014.11.115 |
| الاتاحة: | http://www.osti.gov/servlets/purl/1145778 https://www.osti.gov/biblio/1145778 https://doi.org/10.1016/j.jnucmat.2014.11.115 |
| رقم الانضمام: | edsbas.471A50E6 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.jnucmat.2014.11.115 |
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