Scintillator and method for manufacturing the same

Abstract

A scintillator, a preparation method therefor, and an application thereof are disclosed wherein the scintillator has a chemical formula of TlaAbBc:yCe, wherein: A is at least one rare earth element selected from trivalent rare earth elements; B is at least one halogen element selected from halogen elements; a=1, b=2 and c=7, a=2, b=1 and c=5, or a=3, b=1 and c=6; and y is greater than or equal to 0 and less than or equal to 0.5. According to another embodiment, the scintillator has a chemical formula of TlaAbBc:yEu, wherein: A is an alkaline earth metal element; B is a halogen element; a=1, b=2 and c=5, or a=1, b=1 and c=3; and y is greater than or equal to 0 mol % and less than or equal to 50 mol %.

1 . A scintillator comprising:
 a matrix material including thallium, at least one alkaline earth metal element, and at least one halogen element.   
     
     
         2 . The scintillator of  claim 1 , further comprising:
 an activator, with which the matrix material is doped,   wherein the activator includes europium.   
     
     
         3 . The scintillator of  claim 1 , wherein a chemical formula of the scintillator is Tl a A b B c :yEu, and
 wherein A is at least one alkaline earth metal element selected from divalent alkaline earth metal elements, B is at least one halogen element selected from halogen elements, a is 1, b is 2, and c is 5 or a is 1, b is 1, and c is 3, and y is equal to or more than 0 mol % and equal to or less than 50 mol %.   
     
     
         4 . The scintillator of  claim 1 , wherein the alkaline earth metal element includes at least one of Ca, Ba, and Sr. 
     
     
         5 . The scintillator of  claim 1 , wherein the halogen element includes at least one of Cl, Br, and I. 
     
     
         6 . The scintillator of  claim 1 , wherein the matrix material includes thallium halide and alkaline earth halide. 
     
     
         7 . A method of manufacturing a scintillator, the method comprising:
 manufacturing a matrix material including thallium, at least one alkaline earth metal element, and at least one halogen element.   
     
     
         8 . The method of  claim 7 , wherein the manufacturing of the matrix material includes:
 mixing thallium halide and alkaline earth halide at a mole fraction of 1:2 or 1:1.   
     
     
         9 . The method of  claim 7 , further comprising:
 doping the matrix material with an activator,   wherein the doping the matrix material with the activator includes: doping the matrix material with europium halide.   
     
     
         10 . The method of  claim 7 , further comprising:
 growing the matrix material into a single crystal,   wherein the growing the matrix material into the single crystal includes:   descending an ampoule, in which the matrix material is sealed, while heating the ampoule in a Bridgman electric furnace, and   wherein the crystal is grown as the ampoule descends a crystal growth part in the Bridgman electric furnace, a product of a descent speed of the ampoule in the Bridgman electric furnace and a temperature gradient of the crystal growth part in the Bridgman electric furnace is in a range of 0.05 to 2.0° C./hr, and the temperature gradient of the crystal growth part is a a ratio of a change rate of a temperature with respect to a locational change at a crystal growth location in the Bridgman electric furnace.