Speed of sound in methane under conditions of planetary interiors
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±0.1...
| Hoofdauteurs: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formaat: | Journal article |
| Taal: | English |
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American Physical Society
2024
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| _version_ | 1826313474880307200 |
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| author | White, TG Poole, H McBride, EE Oliver, M Descamps, A Fletcher, LB Angermeier, WA Allen, CH Appel, K Condamine, FP Curry, CB Dallari, F Funk, S Galtier, E Gamboa, EJ Gauthier, M Graham, P Goede, S Haden, D Kim, JB Lee, HJ Ofori-Okai, BK Richardson, S Rigby, A Schoenwaelder, C Sun, P Witte, BL Tschentscher, T Zastrau, U Nagler, B Hastings, JB Monaco, G Gericke, DO Glenzer, SH Gregori, G |
| author_facet | White, TG Poole, H McBride, EE Oliver, M Descamps, A Fletcher, LB Angermeier, WA Allen, CH Appel, K Condamine, FP Curry, CB Dallari, F Funk, S Galtier, E Gamboa, EJ Gauthier, M Graham, P Goede, S Haden, D Kim, JB Lee, HJ Ofori-Okai, BK Richardson, S Rigby, A Schoenwaelder, C Sun, P Witte, BL Tschentscher, T Zastrau, U Nagler, B Hastings, JB Monaco, G Gericke, DO Glenzer, SH Gregori, G |
| author_sort | White, TG |
| collection | OXFORD |
| description | 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±0.1 eV and 0.8±0.1 g/cm−3, corresponding to a pressure of ∼13 GPa. Inelastic x-ray scattering was used to observe the collective oscillations of the ions. With a highly improved energy resolution of ∼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±0.5 km/s, marking a high-temperature data point for methane and demonstrating consistency with Birch's law in this parameter regime. |
| first_indexed | 2024-09-25T04:14:01Z |
| format | Journal article |
| id | oxford-uuid:7f21bab9-058d-4f23-901b-8c6767c32c22 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:14:01Z |
| publishDate | 2024 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:7f21bab9-058d-4f23-901b-8c6767c32c222024-07-12T14:29:10ZSpeed of sound in methane under conditions of planetary interiorsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7f21bab9-058d-4f23-901b-8c6767c32c22EnglishSymplectic ElementsAmerican Physical Society2024White, TGPoole, HMcBride, EEOliver, MDescamps, AFletcher, LBAngermeier, WAAllen, CHAppel, KCondamine, FPCurry, CBDallari, FFunk, SGaltier, EGamboa, EJGauthier, MGraham, PGoede, SHaden, DKim, JBLee, HJOfori-Okai, BKRichardson, SRigby, ASchoenwaelder, CSun, PWitte, BLTschentscher, TZastrau, UNagler, BHastings, JBMonaco, GGericke, DOGlenzer, SHGregori, GWe 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±0.1 eV and 0.8±0.1 g/cm−3, corresponding to a pressure of ∼13 GPa. Inelastic x-ray scattering was used to observe the collective oscillations of the ions. With a highly improved energy resolution of ∼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±0.5 km/s, marking a high-temperature data point for methane and demonstrating consistency with Birch's law in this parameter regime. |
| spellingShingle | White, TG Poole, H McBride, EE Oliver, M Descamps, A Fletcher, LB Angermeier, WA Allen, CH Appel, K Condamine, FP Curry, CB Dallari, F Funk, S Galtier, E Gamboa, EJ Gauthier, M Graham, P Goede, S Haden, D Kim, JB Lee, HJ Ofori-Okai, BK Richardson, S Rigby, A Schoenwaelder, C Sun, P Witte, BL Tschentscher, T Zastrau, U Nagler, B Hastings, JB Monaco, G Gericke, DO Glenzer, SH Gregori, G Speed of sound in methane under conditions of planetary interiors |
| title | Speed of sound in methane under conditions of planetary interiors |
| title_full | Speed of sound in methane under conditions of planetary interiors |
| title_fullStr | Speed of sound in methane under conditions of planetary interiors |
| title_full_unstemmed | Speed of sound in methane under conditions of planetary interiors |
| title_short | Speed of sound in methane under conditions of planetary interiors |
| title_sort | speed of sound in methane under conditions of planetary interiors |
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