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1

Stable Color Centers Induced in Pure and Neodymium Doped Ca_{0.28}Ba_{0.72}Nb_{2}O_{6} Crystals by Gamma Irradiation

100%

Potera P., Zhydachevskii Y., Lukasiewicz T.

Acta Physica Polonica A

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2015

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vol. 127

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issue 3

753-755

EN

The work is devoted to investigation of stable coloration induced by gamma radiation from ^{60}Co (1.25 MeV) in pure and neodymium doped Ca_{0.28}Ba_{0.72}Nb_{2}O_{6} single crystals. Nature of the induced absorption is discussed. This absorption is due to charge change of native defects or ions forming of crystals (vacancy, niobium ions, etc.). The nature of color centers responsible for induced absorption is discussed.

2

Effect of Manganese Concentration on Thermoluminescent Properties of YAlO_{3}:Mn Crystals

100%

Zhydachevskii Y., Suchocki A., Berkowski M., Warchol S.

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issue 1

177-180

EN

This work is devoted to experimental study of the effect of manganese concentration on thermoluminescent properties of YAlO_{3}:Mn crystals grown by the Czochralski method. A new type of emitting centers beside of Mn^{4+} and Mn^{2+} ions was revealed at low concentration of manganese ions in the crystal. These centers are responsible for the high-temperature thermoluminescent peak at 570 K. A potential of this thermoluminescent peak for thermoluminescence dosimetry application is discussed.

3

In situ Investigation of OH^{-} Absorption in LiNbO_{3} and LiNbO_{3}:MgO Crystals during Reducing/Oxidizing Annealing

76%

Sugak Y., Sugak D., Zhydachevskii Y., Solskii I., Buryy O., Ubizskii S., Becker K.

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EN

The work presents experimental results of an in situ investigation of the OH^{-} absorption in pure and MgO-doped LiNbO_{3} crystals during reducing (95% Ar + 5% H_{2}) and oxidizing (O_{2}) high-temperature treatments in the temperature range from room temperature to 820 K. The absorption spectra measured in situ at high temperatures in reducing/oxidizing atmospheres have been analyzed. The origin of the changes in optical absorption caused by heating of the crystal is discussed in terms of the OH-bonds orientation change.

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3 Acta Physica Polonica A

1 2015

2 2010

3 Zhydachevskii Y.

1 Becker K.

1 Berkowski M.

1 Buryy O.

1 Lukasiewicz T.

1 Potera P.

1 Solskii I.

1 Suchocki A.

1 Sugak D.

1 Sugak Y.

1 Ubizskii S.

1 Warchol S.

Stable Color Centers Induced in Pure and Neodymium Doped Ca_{0.28}Ba_{0.72}Nb_{2}O_{6} Crystals by Gamma Irradiation

Effect of Manganese Concentration on Thermoluminescent Properties of YAlO_{3}:Mn Crystals

In situ Investigation of OH^{-} Absorption in LiNbO_{3} and LiNbO_{3}:MgO Crystals during Reducing/Oxidizing Annealing