Dense high-speed scintillator material of low afterglow

An inorganic LYSO-type scintillator material comprising Lu, Y, Si, O, Ce, M, and optionally M′ wherein:

• the relative amounts of Lu, Y, Si, O, Ce, M, and M′ satisfy formula (1):
• Lu(2−y)Y(y−z−x)CexMzSi(1−v)M′vO5 (1)
• M represents a divalent alkaline earth metal and M′ represents a trivalent metal;
• (z+v) is greater than or equal to 0.0001 and less than or equal to 0.2;
• z is greater than 0 and less than or equal to 0.2;
• v is greater than or equal to 0 and less than or equal to 0.2;
• x is greater than or equal to 0.0001 and less than 0.1;
• and
• y is from (x+z) to 1.

An inorganic LYSO-type scintillator material comprising Lu, Y, Si, O, Ce, M, and optionally M′ wherein:

• the relative amounts of Lu, Si, O, Y, Ce, and M or M′ satisfy formula (1):
• Lu(2−y)Y(y−z−x)CexMzSi(1−v)M′vO5 (1)
• M represents a divalent alkaline earth metal and M′ represents a trivalent metal;
• (z+v) is greater than or equal to 0.0001 and less than or equal to 0.2;
• z is greater than 0 and less than or equal to 0.2;
• v is greater than or equal to 0 and less than or equal to 0.2;
• x is greater than or equal to 0.0001 and less than 0.1;
• y is from (x+z) to 1;
• and
• the inorganic scintillator material is a single crystal.

A radiation detector comprising an inorganic LYSO-type scintillator material comprising Lu, Y, Si, O, Ce, M, and optionally M′ wherein:

• the relative amounts of Lu, Si, O, Y, Ce, and M or M′ satisfy formula (1):
• Lu(2−y)Y(y−z−x)CexMzSi(1−v)M′vO5 (1)
• M represents a divalent alkaline earth metal and M′ represents a trivalent metal;
• (z+v) is greater than or equal to 0.0001 and less than or equal to 0.2;
• z is greater than 0 and less than or equal to 0.2;
• v is greater than or equal to 0 and less than or equal to 0.2;
• x is greater than or equal to 0.0001 and less than 0.1;
• and
• y is from (x+z) to 1.