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Phase boundary of hot dense fluid hydrogen

We investigated the phase transformation of hot dense fluid hydrogen using static high-pressure laser-heating experiments in a laser-heated diamond anvil cell. The results show anomalies in the heating efficiency that are likely to be attributed to the phase transition from a diatomic to monoatomic...

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Detalles Bibliográficos
Autores principales: Ohta, Kenji, Ichimaru, Kota, Einaga, Mari, Kawaguchi, Sho, Shimizu, Katsuya, Matsuoka, Takahiro, Hirao, Naohisa, Ohishi, Yasuo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4637881/
https://www.ncbi.nlm.nih.gov/pubmed/26548442
http://dx.doi.org/10.1038/srep16560
Descripción
Sumario:We investigated the phase transformation of hot dense fluid hydrogen using static high-pressure laser-heating experiments in a laser-heated diamond anvil cell. The results show anomalies in the heating efficiency that are likely to be attributed to the phase transition from a diatomic to monoatomic fluid hydrogen (plasma phase transition) in the pressure range between 82 and 106 GPa. This study imposes tighter constraints on the location of the hydrogen plasma phase transition boundary and suggests higher critical point than that predicted by the theoretical calculations.