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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2311.07774 |
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| _version_ | 1866916234780475392 |
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| author | White, Thomas G. Poole, Hannah McBride, Emma E. Oliver, Matthew Descamps, Adrien Fletcher, Luke B. Angermeier, W. Alex Allen, Cameron H. Appel, Karen Condamine, Florian P. Curry, Chandra B. Dallari, Francesco Funk, Stefan Galtier, Eric Gamboa, Eliseo J. Gauthier, Maxence Graham, Peter Goede, Sebastian Haden, Daniel Kim, Jongjin B. Lee, Hae Ja Ofori-Okai, Benjamin K. Richardson, Scott Rigby, Alex Schoenwaelder, Christopher Sun, Peihao Witte, Bastian L. Tschentscher, Thomas Zastrau, Ulf Nagler, Bob Hastings, J. B. Monaco, Giulio Gericke, Dirk O. Glenzer, Siegfried H. Gregori, Gianluca |
| author_facet | White, Thomas G. Poole, Hannah McBride, Emma E. Oliver, Matthew Descamps, Adrien Fletcher, Luke B. Angermeier, W. Alex Allen, Cameron H. Appel, Karen Condamine, Florian P. Curry, Chandra B. Dallari, Francesco Funk, Stefan Galtier, Eric Gamboa, Eliseo J. Gauthier, Maxence Graham, Peter Goede, Sebastian Haden, Daniel Kim, Jongjin B. Lee, Hae Ja Ofori-Okai, Benjamin K. Richardson, Scott Rigby, Alex Schoenwaelder, Christopher Sun, Peihao Witte, Bastian L. Tschentscher, Thomas Zastrau, Ulf Nagler, Bob Hastings, J. B. Monaco, Giulio Gericke, Dirk O. Glenzer, Siegfried H. Gregori, Gianluca |
| contents | We present direct observations of acoustic waves in warm dense matter. We analyze wave-number- and energy-resolved x-ray spectra taken from warm dense methane created by laser heating a cryogenic liquid jet. X-ray diffraction and inelastic free-electron scattering yield sample conditions of 0.3$\pm$0.1 eV and 0.8$\pm$0.1 g/cm$^3$, corresponding to a pressure of $\sim$13 GPa. Inelastic x-ray scattering was used to observe the collective oscillations of the ions. With a highly improved energy resolution of $\sim$50 meV, we could clearly distinguish the Brillouin peaks from the quasielastic Rayleigh feature. Data at different wave numbers were utilized to derive a sound speed of 5.9$\pm$0.5 km/s, marking a high-temperature data point for methane and demonstrating consistency with Birch's law in this parameter regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_07774 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Speed of sound in methane under conditions of planetary interiors White, Thomas G. Poole, Hannah McBride, Emma E. Oliver, Matthew Descamps, Adrien Fletcher, Luke B. Angermeier, W. Alex Allen, Cameron H. Appel, Karen Condamine, Florian P. Curry, Chandra B. Dallari, Francesco Funk, Stefan Galtier, Eric Gamboa, Eliseo J. Gauthier, Maxence Graham, Peter Goede, Sebastian Haden, Daniel Kim, Jongjin B. Lee, Hae Ja Ofori-Okai, Benjamin K. Richardson, Scott Rigby, Alex Schoenwaelder, Christopher Sun, Peihao Witte, Bastian L. Tschentscher, Thomas Zastrau, Ulf Nagler, Bob Hastings, J. B. Monaco, Giulio Gericke, Dirk O. Glenzer, Siegfried H. Gregori, Gianluca Plasma Physics Earth and Planetary Astrophysics We present direct observations of acoustic waves in warm dense matter. We analyze wave-number- and energy-resolved x-ray spectra taken from warm dense methane created by laser heating a cryogenic liquid jet. X-ray diffraction and inelastic free-electron scattering yield sample conditions of 0.3$\pm$0.1 eV and 0.8$\pm$0.1 g/cm$^3$, corresponding to a pressure of $\sim$13 GPa. Inelastic x-ray scattering was used to observe the collective oscillations of the ions. With a highly improved energy resolution of $\sim$50 meV, we could clearly distinguish the Brillouin peaks from the quasielastic Rayleigh feature. Data at different wave numbers were utilized to derive a sound speed of 5.9$\pm$0.5 km/s, marking a high-temperature data point for methane and demonstrating consistency with Birch's law in this parameter regime. |
| title | Speed of sound in methane under conditions of planetary interiors |
| topic | Plasma Physics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2311.07774 |