Vibrational relaxation is measured in amino acid crystals at various temperatures by picosecond CARS spectroscopy. Low-frequency (40-125 cm-1) torsional modes, librons, have lifetimes which can exceed 4 ns. The decrease in lifetime with libron frequency and with temperature is determined primarily by the density of states, which shifts to lower frequency in peptide crystals.
|Original language||English (US)|
|Number of pages||6|
|Journal||Chemical Physics Letters|
|State||Published - Dec 23 1983|
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry