Abstract
Neutron activation analysis technique of the Gd2O2S:М scintillation ceramics was developed. The concentrations of 15 trace, minor and major elements (As, Ce, Co, Cr, Cs, Eu, Fe, La, Sc, Tb, Zn, Zr, Pr, Gd, Na) have been measured with the instrumental neutron activation analysis of the Gd2O2S:Pr sample. The concentrations range of the determined elements is from 3 × 10-8 to 2.0% in mass. The determination limit of the elements was calculated to be (0.6 - 1.3 × 10-8% in mass).
Highlights
Creation of a high-performance and fast-responding scintillators is one of the most essential concept of the material authority of late
The scintillation and the optical characteristics of the ceramics depend on the quality of the base phosphor powder and on its synthesis feature which determines a distribution of the lattice and the impurity defects in the crystal lattice
Spectrum of the tested scintillation ceramics is shown in the Figure 7
Summary
Creation of a high-performance and fast-responding scintillators is one of the most essential concept of the material authority of late. Combination of the high conversion efficiency and the short lifetime which gadolinium oxysulfide (Gd2O2S) obtain at the alloying with trivalent praseodymium (Pr3+) in combination with impurity of Ce3+ and F−, have defined a choice of the phosphor as a base at the development of the ceramic scintillators for a. Hot pressing of the material with traces of Li2GeF6 as a sintering aid is usually used in order that the ceramic scintillator has high translucent. The scintillation and the optical characteristics of the ceramics depend on the quality of the base phosphor powder and on its synthesis feature which determines a distribution of the lattice and the impurity defects in the crystal lattice. Uniformity of the ceramics and the required scintillation parameters are defined with the quality of the initial powder with other things being equal (Table 1)
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