6533b82dfe1ef96bd12911d4

RESEARCH PRODUCT

Time resolved CARS measurements of I2 in solid Kr

Mika PetterssonTiina KiviniemiJukka AumanenPasi Myllyperkiö

subject

Condensed matter physicsPhononDephasingKryptonIntermolecular forcechemistry.chemical_elementsymbols.namesakechemistryPicosecondFemtosecondsymbolsAtomic physicsSpectroscopyRaman scattering

description

Dephasing is a central concept in condensed phase spectroscopy. It determines how long a system will maintain its coherence. The dephasing time of a system is determined by dynamic intermolecular interactions, and therefore measurements of dephasing time can provide information on interactions and couplings between a molecule and its environment. This chapter illustrates the application of the femtosecond coherent anti-Stokes Raman scattering (CARS) method to investigate the vibrational dephasing of I 2 in solid krypton. Dephasing of vibrational states between v = 2 and v = 16 is studied in the temperature range T = 2.6–32 K. The low vibrational states show dephasing times on the order of a hundred picoseconds. The v -dependence of the dephasing rate is roughly quadratic up to v = 16. The temperature dependence of the dephasingrate indicates dephasing by coupling to pseudolocal phonons.

yearjournalcountryeditionlanguage
2006-01-01
https://doi.org/10.1016/b978-044452821-6/50005-8