Benedetti L R, Nguyen J H, Caldwell W A, Liu H, Kruger M, Jeanloz R
Department of Physics, Department of Geology and Geophysics, University of California, Berkeley, CA 94720, USA.
Science. 1999 Oct 1;286(5437):100-2. doi: 10.1126/science.286.5437.100.
Experiments using laser-heated diamond anvil cells show that methane (CH4) breaks down to form diamond at pressures between 10 and 50 gigapascals and temperatures of about 2000 to 3000 kelvin. Infrared absorption and Raman spectroscopy, along with x-ray diffraction, indicate the presence of polymeric hydrocarbons in addition to the diamond, which is in agreement with theoretical predictions. Dissociation of CH4 at high pressures and temperatures can influence the energy budgets of planets containing substantial amounts of CH4, water, and ammonia, such as Uranus and Neptune.
使用激光加热金刚石对顶砧细胞进行的实验表明，在10至50吉帕斯卡的压力和约2000至3000开尔文的温度下，甲烷（CH₄）会分解形成金刚石。红外吸收光谱、拉曼光谱以及X射线衍射表明，除了金刚石之外还存在聚合碳氢化合物，这与理论预测相符。甲烷在高压和高温下的分解会影响含有大量甲烷、水和氨的行星（如天王星和海王星）的能量收支。
