Zobrazeno 1 - 10
of 22
pro vyhledávání: '"V. V. Syt'ko"'
Publikováno v:
Journal of Applied Spectroscopy. 72:814-817
The characteristic features of the luminescence of uranyl nitrate crystals at high excitation power densities have been considered. It is shown that there occurs accumulation of excitations in a system of uranyl centers, whereas the presence of force
Publikováno v:
Journal of Applied Spectroscopy. 71:907-910
The action of the monovalent M+ cations on the luminescent properties of the mixed M () M (2) UO2(NO3)3 crystals, where M is Na, K, Rb, Cs, or NH4 , has been investigated. It has been established that the spectral positions of the bands of vibronic t
Publikováno v:
Journal of Applied Spectroscopy. 71:676-680
The influence of the M+ cations of alkali metals on the luminescent properties of the Meu(PO3)4 crystals, where M represents Li, Na, K, Rb, and Cs, is considered. The nonlinear dependences of the spectral position of the barycenters in the J componen
Publikováno v:
Journal of Applied Spectroscopy. 70:65-69
Temperature evolution of the fine structure of the electronic spectra of uranyl nitrates and fluorides is considered. It is shown that for pure crystals at T = 4.2 K the contour is described by the Lorentz curve; for other cases a convolution of the
Publikováno v:
Journal of Applied Spectroscopy. 70:470-473
The luminescence characteristics of hydrated Ln3+ ions and their complexes with some acidic ligands have been investigated. The possibility of determining the stability of the complexes of lanthanides in solutions from the intensity of luminescence b
Autor:
E. N. Kabaeva, V. V. Syt'ko
Publikováno v:
Journal of Applied Spectroscopy. 69:566-570
We considered the factors due to which the dependences between the uranium–oxygen distances R 0 and the frequencies of valence vibrations νas for complex compounds of uranyl are described by two independent expressions generally represented by equ
Autor:
V. V. Syt'ko, D. S. Umreiko
Publikováno v:
Journal of Applied Spectroscopy. 68:377-393
A review of the works concerned with investigation of the spectroscopic and kinetic properties of the emission of luminescent materials based on phosphate compounds of uranyl with rare‐earth elements is presented. The characteristic features of ele
Publikováno v:
Journal of Applied Spectroscopy. 67:1004-1010
The characteristic features of the low-temperature (6 K) luminescence of Rb3UO2F5 crystals in resonant selective laser excitation within an inhomogeneously broadened contour of a phonon-free line have been investigated. The presence of a nonselective
Publikováno v:
Journal of Applied Spectroscopy. 67:175-179
We have investigated the behavior of the intensity of phonon-free lines appearing in the luminescence spectra of Rb3UO2F5 crystals in the 4.2–40 K range due to a pure electron transition and its vibrational recurrences with the frequency of fully s
Publikováno v:
Journal of Applied Spectroscopy. 67:857-863
Luminescence spectra of vitrified solutions of uranyl sulfate in a concentrated sulfuric acid are investigated in the range 4.2–80 K in selective laser excitation. It is shown that the luminescence spectra are a superposition of two components —