Abstract
The measurement technique and the results obtained by optical spectroscopy during excitation of L-valine molecules by photons described. The photoluminescence spectra of L-valine studied in the wavelength range 400-700 nm during excitation by photons of different energies 3.26-4.51 eV. Peculiarities were found in the luminescence spectra (radiation intensity, positions of maxima), indicating the excitation of the OH, CO and CH molecules as fragments of the valine molecule by photon impact. The same results obtained for the samples of L-valine irradiated by electrons with the dozes 0.2, 0.5, 2 and 5 Gy. Irradiation of L-valine leads to fragmentation of carboxyl COOH group. The biggest changes in photoluminescence spectra observed for the sample with 0.2 Gy irradiation doze. Also X-ray powder diffraction spectra measured, which showed absence of any structural changes for the irradiated samples. The results (photoluminescence and XRay structural spectra) of melted at 330o C L-valine sample are presented.
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