Speed of sound in methane under conditions of planetary interiors

被引：1

作者：

White, Thomas G. ^{[1
,2
]}

Poole, Hannah ^{[2
]}

McBride, Emma E. ^{[3
,4
]}

Oliver, Matthew ^{[1
,2
,5
]}

Descamps, Adrien ^{[3
,4
]}

Fletcher, Luke B. ^{[3
]}

Angermeier, W. Alex ^{[1
]}

Allen, Cameron H. ^{[1
]}

Appel, Karen ^{[6
]}

Condamine, Florian P. ^{[7
]}

Curry, Chandra B. ^{[3
,8
]}

Dallari, Francesco ^{[9
]}

Funk, Stefan ^{[1
,10
]}

Galtier, Eric ^{[3
]}

Gamboa, Eliseo J. ^{[3
]}

Gauthier, Maxence ^{[3
]}

Graham, Peter ^{[1
,11
]}

Goede, Sebastian ^{[6
]}

Haden, Daniel ^{[1
]}

Kim, Jongjin B. ^{[3
]}

Lee, Hae Ja ^{[3
]}

Ofori-Okai, Benjamin K. ^{[3
]}

Richardson, Scott ^{[1
,11
]}

Rigby, Alex ^{[2
]}

Schoenwaelder, Christopher ^{[3
]}

Sun, Peihao ^{[9
]}

Witte, Bastian L. ^{[3
]}

Tschentscher, Thomas ^{[6
]}

Zastrau, Ulf ^{[6
]}

Nagler, Bob ^{[3
]}

Hastings, J. B. ^{[3
]}

Monaco, Giulio ^{[9
]}

Gericke, Dirk O. ^{[1
,2
,12
]}

Glenzer, Siegfried H. ^{[3
]}

Gregori, Gianluca ^{[2
]}

机构：

[1] Univ Nevada, Dept Phys, Reno, NV 89557 USA

[2] Univ Oxford, Dept Phys, Parks Rd, Oxford OX1 3PU, England

[3] SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[4] Queens Univ Belfast, Sch Math & Phys, Univ Rd, Belfast BT7 1NN, North Ireland

[5] STFC Rutherford Appleton Lab, Cent Laser Facil, Chilton OX11 0QX, England

[6] European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany

[7] Extreme Light Infrastruct ERIC, ELI Beamlines Facil, Radnici 835, CZ-25241 Dolni Brezany, Czech Republic

[8] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 1H9, Canada

[9] Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Via F Marzolo 8, I-35131 Padua, Italy

[10] Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Nikolaus Fiebiger Str 2, D-91058 Erlangen, Germany

[11] AWE, Reading RG7 4PR, Berks, England

[12] Univ Warwick, Ctr Fus Space & Astrophys, Dept Phys, Coventry CV4 7AL, England

来源：

PHYSICAL REVIEW RESEARCH | 2024年 / 6卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

X-RAY-DIFFRACTION; DIAMOND FORMATION; ICE LAYER; DISSOCIATION; HYDROCARBONS; SCATTERING; MODELS; URANUS;

D O I：

10.1103/PhysRevResearch.6.L022029

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present direct observations of acoustic waves in warm dense matter. We analyze wave -number- and energyresolved 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 similar to 13 GPa. Inelastic x-ray scattering was used to observe the collective oscillations of the ions. With a highly improved energy resolution of similar to 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.

引用

页数：7

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