Low Temperature Physics: 36, 424 (2010); https://doi.org/10.1063/1.3432267 (15 pages)
Физика Низких Температур: Том 36, Выпуск 5 (Май 2010), c. 532-548    ( к оглавлению , назад )

Lattice phonons of solid phases (α, β, δ, ε) of carbon monoxide by optical studies

A. Serdyukov1,2, M. Vetter1, A. Brodyanski1,3, and H.J. Jodl1

1 Fachbereich Physik, TU Kaiserslautern, Germany

2 Physikalisch-Technische Bundesanstalt, Abbestrasse 2–12 D-10587 Berlin-Charlottenburg, Germany

3 Institut fuer Oberflaechen- und Schichtanalytik (IFOS) an der TU Kaiserslautern, Germany
E-mail: anton.serdyukov@gmail.com

Received October 26, 2009


The phase diagram of solid carbon monoxide was investigated in the pressure range 0–10 GPa and temperature range 30–300 K by infrared and Raman spectroscopy. The tentative phase diagram known from literature was expanded and specified in details. The δ-phase region is divided into two subphases — δrot and δloc that is similar to the one in solid nitrogen. The pressure-temperature behavior of the elementary and combined excitations was also followed up. The vibron overtone region was carefully investigated by FTIR spectroscopy as a function of temperature at different pressures, whereas the fundamental one — by Raman spectroscopy. The features of the IR-active phonon sideband to the vibron overtone were investigated in details in the whole pressure-temperature region. The lattice-phonon spectra were studied by Raman spectroscopy as a function of pressure (at lowest temperature) and by IR spectroscopy as a function of temperature at saturated vapor pressure.

PACS: 33.20.Ea Infrared spectra;
PACS: 33.20.Fb Raman and Rayleigh spectra (including optical scattering);
PACS: 33.20.Vq Vibration-rotation analysis.

Key words: Carbon monoxide, lattice phonons, phonon sideband, phase diagram, infrared spectroscopy, Raman spectroscopy.