A phosphor has a crystal structure of a garnet type and is expressed by a general formula Ba.sub.aY.sub.3-a-bAl.sub.5-aSi.sub.aO.sub.12:Ce.sub.b (wherein a and b are values within a range that satisfies 12.0113≤A+0.036b−0.003a≤12.0153, when A denotes a lattice size of the crystal structure, a [mol] denotes an amount of Ba incorporated in solid solution, and b [mol] denotes an amount of Ce incorporated in solid solution).

A scintillation compound can include a rare earth element that is in a divalent (RE.sup.2+) or a tetravalent state (RE.sup.4+). The scintillation compound can include another element to allow for better change balance. The other element may be a principal constituent of the scintillation compound or may be a dopant or a co-dopant. In an embodiment, a metal element in a trivalent state (M.sup.3+) may be replaced by RE.sup.4+ and a metal element in a divalent state (M.sup.2+). In another embodiment, M.sup.3+ may be replaced by RE.sup.2+ and M.sup.4+. In a further embodiment, M.sup.2+ may be replaced by a RE.sup.3+ and a metal element in a monovalent state (M.sup.1+). The metal element used for electronic charge balance may have a single valance state, rather than a plurality of valence states, to help reduce the likelihood that the valance state would change during formation of the scintillation compound.

A glass having from greater than or equal to about 0.1 mol. % to less than or equal to about 20 mol. % Ho.sub.2O.sub.3, and one or more chromophores selected from V, Cr, Mn, Fe, Co, Ni, Se, Pr, Nd, Er, Yb, and combinations thereof. The amount of Ho.sub.2O.sub.3 (mol. %) is greater than or equal to 0.7(CeO.sub.2 (mol. %)+Pr.sub.2O.sub.3 (mol. %)+Er.sub.2O.sub.3 (mol. %)). The glass can include one or more fluorescent ions selected from Cu, Sn, Ce, Eu, Tb, Tm, and combinations thereof in addition to, or in place of the chromophores. The glass can also include multiple fluorescent ions.

A preparation method and use of a green fluorescent transparent ceramic are disclosed. The preparation method includes: weighing, according to a stoichiometric ratio, elements present in Ca.sub.3-x-yCe.sub.xA.sub.ySc.sub.2-xB.sub.zSi.sub.3-mC.sub.mO.sub.12, in forms of oxides, carbonates or nitrates as raw materials; mixing the raw materials, annealing, melting at a high temperature, cooling and annealing at a low temperature; putting the glass into a high-temperature furnace, holding, raising the temperature, and performing crystallization and densification sintering; finally cutting, reducing and surface-polishing, where A is at least one from the group consisting of Lu, Y, Gd, La and Na; B is at least one from the group consisting of Zr, Hf and Mg; C is at least one from the group consisting of Al and P; x, y, z and m satisfy 0.001≤x≤0.06, 0≤y≤0.06, 0≤z≤0.06 and 0≤m≤0.3, respectively.

A scintillation compound can include a rare earth element that is in a divalent (RE.sup.2+) or a tetravalent state (RE.sup.4+). The scintillation compound can include another element to allow for better change balance. The other element may be a principal constituent of the scintillation compound or may be a dopant or a co-dopant. In an embodiment, a metal element in a trivalent state (M.sup.3+) may be replaced by RE.sup.4+ and a metal element in a divalent state (M.sup.2+). In another embodiment, M.sup.3+ may be replaced by RE.sup.2+ and M.sup.4+. In a further embodiment, M.sup.2+ may be replaced by a RE.sup.3+ and a metal element in a monovalent state (M.sup.1+). The metal element used for electronic charge balance may have a single valance state, rather than a plurality of valence states, to help reduce the likelihood that the valance state would change during formation of the scintillation compound.

Embodiments of the invention include an infrared-emitting phosphor comprising (La,Gd).sub.3Ga.sub.5-x-yAl.sub.xSiO.sub.14:Cr.sub.y, where 0≤x≤1 and 0.02≤y≤0.08. In some embodiments, the infrared-emitting phosphor is a calcium gallogermanate material. In some embodiments, the infrared-emitting phosphor is used with a second infrared-emitting phosphor. The second infrared-emitting phosphor is one or more chromium doped garnets of composition Gd.sub.3-x1Sc.sub.2-x2-yLu.sub.x1+x2Ga.sub.3O.sub.12:Cr.sub.y, where 0.02≤x1≤0.25, 0.05≤x2≤0.3 and 0.04≤y≤0.12.

A phosphor has a composition represented by Chemical formula 1: 1.5Y.sub.2O.sub.3.Math.2.5aAl.sub.2O.sub.3:Ce where a is a number satisfying 1.02<a<1.1.

The invention relates to an inorganic scintillator material of formula Lu.sub.(2-y)Y.sub.(y-z-x)Ce.sub.xM.sub.zSi.sub.(1-v)M.sub.vO.sub.5, in which: M represents a divalent alkaline earth metal and M represents a trivalent metal, (z+v) being greater than or equal to 0.0001 and less than or equal to 0.2; z being greater than or equal to 0 and less than or equal to 0.2; v being greater than or equal to 0 and less than or equal to 0.2; x being greater than or equal to 0.0001 and less than 0.1; and y ranging from (x+z) to 1.

In particular, this material may equip scintillation detectors for applications in industry, for the medical field (scanners) and/or for detection in oil drilling. The presence of Ca in the crystal reduces the afterglow, while stopping power for high-energy radiation remains high.

The invention relates to an inorganic scintillator material of formula Lu.sub.(2-y)Y.sub.(y-z-x)Ce.sub.xM.sub.zSi.sub.(1-v)M.sub.vO.sub.5, in which: M represents a divalent alkaline earth metal and M represents a trivalent metal, (z+v) being greater than or equal to 0.0001 and less than or equal to 0.2; z being greater than or equal to 0 and less than or equal to 0.2; v being greater than or equal to 0 and less than or equal to 0.2; x being greater than or equal to 0.0001 and less than 0.1; and y ranging from (x+z) to 1.

In particular, this material may equip scintillation detectors for applications in industry, for the medical field (scanners) and/or for detection in oil drilling. The presence of Ca in the crystal reduces the afterglow, while stopping power for high-energy radiation remains high.

A material represented by the following formula (I)
(M).sub.8M.sub.6M.sub.6O.sub.24(X,S).sub.2:Mformula (I).
Also disclosed is an ultraviolet radiation sensing material, an X-radiation sensing material, a device and a method for determining the intensity of ultraviolet radiation.