Two thermoluminescence(TL)materials MgB

4

O

7

:Dy and MgB

4

O

7

:Tb were synthesized under the condition of high temperature.The 3-dimensional(3D)TL spectra of two materials were measured by the 3D TL spectrometer made in the laboratory.From the 3D TL spectra of MgB

4

O

7

:Dy

we can conclude:there are two TL glow peaks at about 220 and 380℃ and the wavelengths of the TL emission spectra are 480

575

660 nm.The intensity ratio of glow peak at about 220℃ to that at 380℃ can be raised gradually by high temperature treatment.However

the temperature and wavelength of the glow peaks have no obvious change.From the 3D spectra of MgB

4

O

7

:Tb

we can conclude:there are three TL peaks at about 230

360 and 420℃ and the wavelengths of the TL emission spectra is 489

543

589

620 nm.Different sintered temperature affects not only the TL sensitivity of MgB

4

O

7

:Tb

but also the spectral shape of the 3D TL spectra.When the temperature is higher than 850℃

the spectral line of Tb

3+

turns to the spectral band.By comparing the TL glow curve and emission spectra between MgB

4

O

7

:Dy and MgB

4

O

7

:Tb

we can conclude that in the TL material doped with trivalence rare earth ions

the temperature of the glow peak is mainly decided by the host and the emission wavelength of the glow peak is mainly due to the transition of the energy level of the rare earth ions.