Evidence for dissociation in shock-compressed methane

被引：4

作者：

Tabak, G. ^{[1
,2
]}

Rygg, J. R. ^{[1
,2
,3
]}

Millot, M. ^{[4
]}

Kim, Y. -j. ^{[4
]}

Hamel, S. ^{[4
]}

Celliers, P. M. ^{[4
]}

Fratanduono, D. E. ^{[4
]}

Ali, S. ^{[4
]}

Erskine, D. ^{[4
]}

Boehly, T. R.

Suer, T. -A.

Dasenbrock-gammon, N. ^{[2
]}

Dias, R.

Zhang, S. ^{[1
]}

Hu, S. X. ^{[1
,2
,3
]}

Hansen, L. E. ^{[1
,2
]}

Henderson, B. J. ^{[1
,2
]}

Zaghoo, M. ^{[1
]}

Ogawa, T. ^{[5
]}

Murayama, D. ^{[5
]}

Miyanishi, K. ^{[5
,6
]}

Ozaki, N. ^{[5
,7
]}

Sano, T. ^{[7
]}

Jeanloz, R. ^{[8
]}

Hicks, D. G. ^{[9
]}

Eggert, J. H. ^{[3
]}

Collins, G. W. ^{[1
,2
,3
]}

机构：

[1] Lab Laser Energet, Rochester, NY 14623 USA

[2] Univ Rochester, Dept Phys & Astron, Rochester, NY 14611 USA

[3] Univ Rochester, Dept Mech Engn, Rochester, NY 14611 USA

[4] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[5] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan

[6] RIKEN, SPring 8 Ctr, Sayo, Hyogo 6795148, Japan

[7] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan

[8] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA

[9] Swinburne Univ Technol, Opt Sci Ctr, Dept Phys & Astron, Hawthorn, Vic 3122, Australia

来源：

PHYSICAL REVIEW B | 2024年 / 109卷 / 06期

基金：

美国国家科学基金会;

关键词：

EQUATION-OF-STATE; DIAMOND FORMATION; REFRACTIVE-INDEX; ICE LAYER; PRESSURE; GPA; HYDROCARBONS; NEPTUNE; LIQUID; TABLES;

D O I：

10.1103/PhysRevB.109.064102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Theory and experiments show that, with increasing pressure, the chemical bonds of methane rearrange, leading to the formation of complex polymers and then to dissociation. However, there is disagreement on the exact conditions where these changes take place. In this study, methane samples were precompressed in diamond-anvil cells and then shock compressed to pressures reaching 400 GPa, the highest pressures yet explored in methane. The results reveal a qualitative change in the Hugoniot curve at 80-150 GPa, which is interpreted as a signature of dissociation based on thermodynamic calculations and theoretical predictions.

引用

页数：9

共 54 条

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