Francis en Mapping Ignorance: The Sandia Z machine unveils the interior of gas-giant planets

Por Francisco R. Villatoro, el 10 julio, 2015. Categoría(s): Ciencia • Colaboración Mapping Ignorance • Física • Noticias • Physics • Science

Science Magazine

Te recomiendo leer mi última contribución “The Sandia Z machine unveils the interior of gas-giant planets,» Mapping Ignorance, 10 Jul 2015. El primer párrafo, en inglés, dice: “The standard three-layer model for the interior of Jupiter and Saturn claims that an outer layer of molecular hydrogen surrounds an inner layer of liquid metallic hydrogen, with a probable rocky, molten core. The Z machine at Sandia National Laboratories has been used to explore the boundary between the insulator and metallic hydrogen layers. At very large pressure, the molecular hydrogen shows a liquid-liquid, insulator-to-metal transition (LL-IMT) into metallic hydrogen. Markus D. Knudson, Sandia National Laboratories, Albuquerque, New Mexico, USA, and colleagues have published in Science the first direct observation of this transition in dense liquid deuterium at pressures around 300 gigapascals (GPa) and temperatures between 1000 and 2000 K during a tenth of a microsecond. Under these conditions, the Z machine reproduces in the laboratory the high pressures due to the gravitational field inside the gas-giant planets.»

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Mi contribución está basada en el artículo de M. D. Knudson, M. P. Desjarlais, A. Becker, et al., “Direct observation of an abrupt insulator-to-metal transition in dense liquid deuterium,” Science 348: 1455-1460, 26 June 2015, doi: 10.1126/science.aaa7471; también se citan E. Wigner, H. B. Huntington, On the possibility of a metallic modification of hydrogen. Journal of Chemical Physics 3: 764-770, 1935, doi: 10.1063/1.1749590; Graeme J. Ackland, “Bearing down on hydrogen,” Science 348: 1429-1430, 26 June 2015, doi: 10.1126/science.aac6626; y Jérémy Leconte, Gilles Chabrier, “Layered convection as the origin of Saturn’s luminosity anomaly,” Nature Geoscience 6: 347-350, 2013, doi: 10.1038/ngeo1791.

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