Low Temperature Physics: 29, 832 (2003); https://doi.org/10.1063/1.1619353 (6 pages)
Физика Низких Температур: Том 29, Выпуск 9-10 (Сентябрь 2003), c. 1093-1100    ( к оглавлению , назад )

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


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.

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