Time-resolved CARS measurements of vibrational decoherence of I2 isolated in matrix Ar

Spectroscopy in Cryocrystals and Matrices

Автор(и)

  • M. Karavitis Department of Chemistry, University of California Irvine, CA 92697-2025, USA
  • D. Segale Department of Chemistry, University of California Irvine, CA 92697-2025, USA
  • Z. Bihary Department of Chemistry, University of California Irvine, CA 92697-2025, USA
  • M. Pettersson Department of Chemistry, University of California Irvine, CA 92697-2025, USA
  • V.A. Apkarian Department of Chemistry, University of California Irvine, CA 92697-2025, USA

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.1614200

Ключові слова:

PACS: 42.65.Dr, 67.80.–s

Анотація

Time-resolved coherent anti-Stokes Raman scattering is applied to prepare and interrogate vibrational coherences on the ground electronic surface of molecular iodine isolated in Ar matrices. The coherence decay time shows a linear dependence on vibrational quantum numbers, for v = 3–15. The temperature dependence of decoherence rates is negligible for v < 7, in the experimental range T = 18–32 K. For a v = 13, 14 superposition, the temperature dependence indicates dephasing by a 66 cm–1 pseudo-local phonon, just outside the Debye edge of the solid. The accuracy of the data is limited due to two-photon induced dissociation of the molecule, which process is characterized using polarized fields. The T → 0 limit of dephasing is discussed.

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Опубліковано

2003-09-01

Як цитувати

(1)
M. Karavitis, D. Segale, Z. Bihary, M. Pettersson, and V.A. Apkarian, Time-resolved CARS measurements of vibrational decoherence of I2 isolated in matrix Ar: Spectroscopy in Cryocrystals and Matrices, Low Temp. Phys. 29, (2003) [Fiz. Nizk. Temp. 29, 1071-1080, (2003)] DOI: https://doi.org/10.1063/1.1614200.

Номер

Том 29 № 9-10 (2003)

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