1985/07/01 by H. K. Mao, P. M. Bell, Russell J. Hemley · 2 citations
Physics and Astronomy · Earth and Planetary Sciences · #Advanced Chemical Physics Studies #Quantum, superfluid, helium dynamics #High-pressure geophysics and materials
paper · doi:10.1103/physrevlett.55.99
openalex publication_date 1985/07/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/06/11
Hydrogen and deuterium have been pressurized under static conditions to 1.47 Mbar, which is higher by a factor of 2 than previously reported static data. Measurements of the vibron indicate an initial increase and then a sharp decrease in frequency at pressures above 0.5 Mbar. At 1.14 Mbar the vibron frequency decreased to the zero-pressure value, and at 1.47 Mbar the frequency of the vibron in hydrogen is 90 cm^\mathrm\ensuremath-1 below the value of the vibrational mode of the isolated molecule. This pronounced softening of the vibron suggests strengthened intermolecular interaction.