CaSO4:RE(La,Y)them-selves could not emit fluorescent light,the addition of Y3+ and La3+ ions had no effect on crystal lattice of matrix,but could enhance the luminescent intensity of CaSO4; Eu2+.

• CaSO_4:RE(La,Y)本身没有荧光,Y~(3+),La~(3+)掺入CaSO_4:Eu中未改变基质的晶型结构,但可增强CaSO_4:Eu中Eu~(2+)的荧光强度。