Low Temperature Physics: 29, 832 (2003); https://doi.org/10.1063/1.1619353 (6 pages)
Fizika Nizkikh Temperatur: Volume 29, Number 9-10 (September 2003), p. 1093-1100    ( to contents , go back )

Quantum property of solid hydrogen as revealed by high-resolution laser spectroscopy

Hiroyuki Katsuki, Mizuho Fushitani, and Takamasa Momose

Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
E-mail: momose@kuchem.kyoto-u.ac.jp
pos Анотація:

Abstract

Pure vibrational overtone transitions of solid parahydrogen were studied using high-resolution laser spectroscopy. Extremely narrow spectral linewidth (~20 MHz) allowed us to observe rich spectral structure that originates in subtle intermolecular interactions in the crystal. It was found that anisotropy of the distribution of zero-point lattice vibration of hydrogen molecules perturbs the energy levels of the vibrationally excited states significantly. Large amplitude of the zero-point lattice vibration being an intrinsic nature of quantum solids, was directly observed from the present high-resolution spectroscopy. The first observation of a pure vibrational overtone transition of solid orthodeuterium is also discussed.

PACS:
33.20.Ea - Infrared spectra
63.50.+x - Vibrational states in disordered systems
67.80.-s - Solid helium and related quantum crystals

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