Scintillator single crystal and production method of same
AssigneeHitachi Chemical Company, Ltd.
InventorsYasushi Kurata, Naoaki Shimura, Tatsuya Usui, Kazuhisa Kurashige
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Abstract
A scintillator single crystal of a specific cerium-doped silicate compound that contains 0.00005 to 0.1 wt % of one or more types of element selected from the group consisting of elements belonging to group 2 of the periodic table based on the total weight of the single crystal.
Claims4
A scintillator single crystal of a cerium-doped silicate compound represented by the following general formula (1) or (2) that contains 0.00005 to 0.1 wt % of Ca based on the total weight of the single crystal:
- Y2−(x+y)LnxCeySiO5 (1)
- (wherein, Ln represents at least one type of element selected from the group consisting of elements belonging to the rare earth elements, x represents a numerical value of 0 to 2, and y represents a numerical value of greater than 0 but less than or equal to 0.2);
- Gd2−(z+w)LnzCewSiO5 (2)
- (wherein, Ln represents at least one type of element selected from the group consisting of elements belonging to the rare earth elements, z represents a numerical value of greater than 0 but less than or equal to 2, and w represents a numerical value of greater than 0 but less than or equal to 0.2).
A scintillator single crystal of a cerium-doped silicate compound represented by the following general formula (3) that contains 0.00005 to 0.1 wt % of Ca based on the total weight of the single crystal:
- Gd2−(p+q)LnpCeqSiO5 (3)
- (wherein, Ln represents at least one type of element selected from the group consisting of the rare earth elements of Dy, Ho, Er, Tm, Yb, Lu, Y and Sc having a smaller ionic radius than Tb, p represents a numerical value of greater than 0 but less than or equal to 2, and q represents a numerical value of greater than 0 but less than or equal to 0.2).
A scintillator single crystal of a cerium-doped silicate compound represented by the following general formula (4) that contains 0.00005 to 0.1 wt % of Ca based on the total weight of the single crystal:
- Gd2−(r+s)LurCesSiO5 (4)
- (wherein, r represents a numerical value of greater than 0 but less than or equal to 2, and s represents a numerical value of greater than 0 but less than or equal to 0.2).
Dependencies are inferred from the claim text.