Published August 17, 1992
| Version v1
Journal article
Synchrotron infrared spectroscopy at megabar pressures: Vibrational dynamics of hydrogen to 180 GPa
- 1. National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973 (United States)
- 2. Geophysical Laboratory and Center for High-Pressure Research, Carnegie Institution of Washington, Washington, D.C. 20015 (United States)
Description
We have developed new techniques for measuring infrared spectra at megabar pressures using synchrotron radiation and applied them to study the Q1(1), Q1(1)+S1(0), and QR(J) vibrational transitions of solid hydrogen to 180 GPa. The frequency difference between the Q1(1) infrared and Raman vibrons increases from 3 cm-1 (zero pressure) to 510 cm-1 (180 GPa), including a dramatic increase in intermolecular coupling with pressure. A negative frequency shift is observed for the infrared vibron above 140 GPa. A significant increase in frequency and LO-TO splitting of the lattice phonon is also documented
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 69
- Journal Issue
- 7
- Journal Page Range
- p. 1129-1132.
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24010251
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- HYDROGEN; INFRARED SPECTRA; INTERMOLECULAR FORCES; MEASURING METHODS; RAMAN SPECTROSCOPY; RELAXATION; SOLIDS; SYNCHROTRON RADIATION; VERY HIGH PRESSURE; VIBRATIONAL STATES
- Descriptors DEC
- BREMSSTRAHLUNG; ELECTROMAGNETIC RADIATION; ELEMENTS; ENERGY LEVELS; EXCITED STATES; LASER SPECTROSCOPY; NONMETALS; RADIATIONS; SPECTRA; SPECTROSCOPY