Novel Phosphors of ${\rm Eu}^{3+}$ or ${\rm Sm}^{3+}$ Doped ${\rm Li}_{6}{\rm Lu}({{\rm BO}_3)_3}$ for X-Ray Imaging

${\rm Li}_{6}{\rm Lu}({{\rm BO}_3)_3}{:}{\rm Eu}^{3+}$
and
${\rm Li}_{6}{\rm Lu}({{\rm BO}_3)_3}{:}{\rm Sm}^{3+}$
are produced by solid state reaction. We have synthesized and characterized the luminescence of their properties for the first time. Firstly, we confirmed the structure and shape of
${\rm Li}_{6}{\rm Lu}({{\rm BO}_3)_3}{:}{\rm Eu}^{3+}$
,
${\rm Sm}^{3+}$
phosphor using X-ray diffraction. Secondly, we optimized doping concentrations of activators. The lithium lutetium borate has a high effective atomic number
$(Z_{\rm eff}=52)$
and the molecular weight is 393 g/mol. Hence, it is considered that the efficiency of absorption is high in comparison to that of commonly used phosphor in X-ray imaging.