6533b86cfe1ef96bd12c8c30
RESEARCH PRODUCT
High-pressure Raman scattering of the stretching mode in nitrogen along the 300-K isotherm
T. WesterhoffA. WittigR. Feilesubject
Materials scienceDephasingchemistry.chemical_elementNitrogensymbols.namesakeNuclear magnetic resonancechemistryPhase (matter)High pressuresymbolsMoleculeAtomic physicsRaman spectroscopyRaman scatteringdescription
We present Raman scattering studies of the vibrational band of nitrogen at room temperature between 1 and 31 GPa allowing a detailed line-shape analysis. For the fluid and \ensuremath{\beta} phases the vibrational linewidths compare to dephasing rates ${\mathit{T}}_{2}^{\mathrm{\ensuremath{-}}1}$ determined by experiments in the time domain. The \ensuremath{\delta}-\ensuremath{\epsilon} transition is unmistakably marked by a drop of the vibrational linewidths around 17 GPa. A further transition into the \ensuremath{\eta} phase around 20 GPa proposed from previous Raman results can be ruled out. Additionally, clear evidence is found for a dynamical freezing of the ${\mathrm{N}}_{2}$ molecules within the \ensuremath{\delta} phase. \textcopyright{} 1996 The American Physical Society.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-07-01 | Physical Review B |