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[en] The purpose of the present study was to obtain the FTIR spectra of propanol molecules trapped in the Ar matrix at the continuously increasing temperature stepping by 1 K, from T = 11 K to 30 K, i.e., up to the onset of the matrix evaporation at 31 K. The whole set of spectral data obtained in this way is then used to construct the so-called dynamic spectra and to process them applying the 2D correlation analysis.

[en] Raman spectra of germacyclohexane in liquid and solid states were recorded and depolarization data obtained. Infrared absorption spectra of the vapor and liquid have been studied. The wavenumbers of the vibrational modes were derived in the harmonic and anharmonic approximation in B3LYP/ccpVTZ calculations. According to the calculations, germacyclohexane exists in the stable chair conformation, whereas a possible twist form should have more than 15 kJ·mol^-1 higher enthalpy of formation what makes this conformer experimentally not observable. The 27 A' and 21 A'' fundamentals were assigned on the basis of the calculations and infrared and Raman band intensities, contours of gas phase infrared spectral bands and Raman depolarization measurements. An average discrepancy of ca. 0.77 % was found between the observed and the calculated anharmonic wavenumbers for the 48 modes. Substitution of carbon atom with Ge atom in the cyclohexane ring is reasoning flattening of the ring

[en] SiO_x-containing amorphous diamond like carbon (DLC) is very attractive material for a number of practical applications. DLC films are possible candidates for the formation of passive layers in electronic devices and are used as protective coatings. Both applications are interesting for the construction of medical radiation detectors. Radiation induced structural changes and electrical properties of DLC: SiO_x films (undoped and co-doped) synthesized at room temperature by means of direct ion beam deposition method were investigated after their irradiation with high energy (E_max = 15 MeV) X-ray photons. It was found that transparency of the irradiated DLC films was not changed significantly, as compared to initial samples, stating only small increase of the optical band gap in DLC films. However radiation induced changes were dependent on co-doping and film deposition conditions which were responsible for the sp³/sp² ratio and hydrogen content in the investigated films. Analysis of U-I characteristics showed decreasing tendency of the leakage current in the range 0-20 V and especially high dependency of breakdown voltage on the deposited contact area in irradiated films as compared to initial samples. Possible mechanism of radiation induced changes in irradiated DLC films is discussed on the basis of the results of Raman and Infrared spectroscopy

[en] Amorphous hydrogenated diamond-like carbon (DLC) films synthesized at room temperature from acetylene gas on quartz glass wafers by means of the direct ion beam deposition method and irradiated with X-ray photons of different energy were investigated. Ionizing radiation induced changes of bonding structure in a-C:H films of different thickness and different density were studied using Raman and infrared spectroscopy and atomic force microscopy. Optical transmittance spectra of the DLC films in UV-vis range were measured as well. The influence of technological deposition characteristics on the optical properties of irradiated amorphous DLC films and the role of the hydrogen in the DLC films were estimated and discussed with the purpose to assess possible application of amorphous hydrogenated DLC films as the protective coatings in radiation detectors. All investigated DLC films showed some increasing tendency of the optical transmittance in the visible and infrared range after the irradiation. Low density PLCH films irradiated with high energy X-ray photons were highly transparent in the whole UV-vis range and indicated possible changes in the bonding structure of the irradiated samples, which have been discussed on the basis of the results obtained during this investigation