On Specific Quenching of Tb3+ Ions Radioluminescence in Aqueous Solutions by Hydrogen Atom

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Abstract

The influence of acceptors of the water radiolysis primary products of the H atom and ea–q on the spectra and intensity of the Tb3+ ion radioluminescence and photoluminescence in aqueous solutions of TbCl3 and Tb(NO3)3 is considered. The activation effect of Tb3+ radioluminescence in the presence of H acceptors was revealed, indicating the presence of a specific quenching reaction (Tb3+)* by this radiolysis product, inhibited by its acceptors. An increase in activation was found in the joint presence of H and hydrated electron acceptors in the solution; for acceptors of the latter, a similar activation effect of Tb3+ radioluminescence was established earlier.

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About the authors

G. L. Sharipov

Ufa Federal Research Center of the Russian Academy of Sciences

Email: abdr-73@ya.ru
Russian Federation, Ufa

A. M. Abdrakhmanov

Ufa Federal Research Center of the Russian Academy of Sciences

Author for correspondence.
Email: abdr-73@ya.ru
Russian Federation, Ufa

B. M. Gareev

Ufa Federal Research Center of the Russian Academy of Sciences

Email: abdr-73@ya.ru
Russian Federation, Ufa

L. R. Yakshembetova

Ufa Federal Research Center of the Russian Academy of Sciences

Email: abdr-73@ya.ru
Russian Federation, Ufa

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2. Fig. 1. The PH spectrum of terbium chloride solution in H2O (* = 365 nm, dotted line, the spectrum is normalized according to the maximum intensity of the RL spectra) and the RL spectra of terbium chloride and nitrate in H2O (C = 0.005 mol/l) without additives. For clarity of comparison, the RF spectra are shifted by 5 and 10 nm, respectively, relative to the PL spectrum. All spectra were registered under the same conditions (MDR-23)

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3. Fig. 2. RL spectra of terbium nitrate in H2O (C = 0.005 mol/l) from bottom to top: without additives, in the presence of additives (C = 0.25 mol/l) NaNO3, Na2S2O3, together NaNO3 and Na2S2O3 in equal concentrations, CdCl2 and AgNO3

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4. Fig. 3. The effect of Q acceptors on the PH intensity of terbium nitrate (C = 0.005 mol/l). From bottom to top: Q ≡ NO3– (NaNO3), S2O32– (Na2S2O3), together NO3– (NaNO3) and S2O32– (Na2S2O3) in equal concentrations, Cd2+ (CdCl2) and Ag+ (AgNO3)

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