A computerized system used for measuring three dimensional emission spectra of thermoluminesence(TL)and optically stimulated luminescence(OSL)is introduced.The system is composed of heating system

optical stimulation sources

optic spectrometer

and computer system.The sample is coupled to the spectro-meter through a fiber optic cable.When the sample is stimulated by heating or light irradiation

the TL or OSL signal will be decomposed into spectrum by a diffraction grating

and the spectrum is collected by a charge coupled device(CCD)with high sensitivity

and then a high speed ADC converts the analog signal of spectrum image to digital signal which can directly be dealt with the computer.The wavelength range of the spectrometer is from 200 nm to 800 nm.All programming was done in VC

++

6.0.The man-machine interface is friendly and the operation is easy and efficient.As an example

the TL and OSL emission spectra of SrSO

4

:Eu(0.1%

mol fraction)and CaSO

4

:Eu(0.1%

mol fraction)were measured with satisfying results.Thermoluminescence(TL)and optical stimulated luminescence(OSL)emission spectra of SrSO

4

:Eu(0.1%)and CaSO

4

:Eu(0.1%)were measured.The results illuminate that the TL and OSL emission wavelengths of SrSO

4

:Eu are 375 nm

and those of CaSO

4

:Eu are 385 nm.The TL and OSL emission spectra also indicate that TL and OSL have the same luminescence centers

and the luminescence comes from transitions between energy levels of Eu

2+

.The luminescence of Eu

3+

is observed in the TL emission spectrum of CaSO

4

:Eu as well.From the 3-dimensional spectra

more information about luminescence can be used to perform further studies on the kinetics of TL and OSL materials.