(200)Hexamethylenetetramine Resins. Infrared Spectra of Hexamine Monophenol Crystals.

Infrared Spectra of Tissues.

Near-Infrared Spectra of Ultraluminous Infrared Galaxies.

Near-infrared spectra with a resolution of lambda&solm0;Deltalambda approximately 1100 in the rest-wavelength range of 1.8-2.2 µm have been obtained for a complete sample of 33 ultraluminous infrared galaxies (ULIRGs). Of the 33 objects observed, two show evidence of a central active galactic nucleus (AGN) through either a broad Paschen-alpha line or emission in the 1.963 µm fine structure of [...

Temperature-dependent far-infrared spectra of single crystals of high explosives using terahertz time-domain spectroscopy.

Survey spectra of single-crystal HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine), RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine), and PETN (pentaerythritol tetranitrate) were acquired in the region from 10 to 80 cm(-1) using terahertz time-domain spectroscopy. The spectra were taken at temperatures ranging from 8.4 to 300 K. Generally, the spectra show multiple absorption peaks in the ran...

Infrared and Raman spectra of LiV 2 O 5 single crystals

The phonon dynamics of LiV2O5 single crystals is studied using infrared and Raman spectroscopy techniques. The infrared-active phonon frequencies and dielectric constants are obtained by oscillator fitting procedure of the reflectivity data measured at room temperature. The Raman scattering spectra are measured at room temperature and at T=10 K in all nonequivalent polarized configurations. The...

Polarized Raman Spectra and Infrared Analysis of Vibrational Modes in L-Threonine Crystals

Studies of temperature vibrational spectra of amino acids by Raman and infrared spectroscopies are useful in obtaining information regarding the behavior of normal modes and stability of the structure under changes of external conditions, molecular conformation, the effects of various types of intermolecular forces on vibrational frequencies and, sometimes, the nature of hydrogen bonding in the...