The MgSO 4:Tm

Mn

P has been prepared by doping and co-doping method

and its two main thermoluminescence (TL) glow peaks are at 253℃ and 383℃ with wavelengths around 360

460 and 660nm. By comparing glow curves of four materials (i.e. MgSO 4:Tm; MgSO 4:Tm

Mn; MgSO 4:Tm

P and MgSO 4:Tm

Mn

P)

the role of the dopants Tm

Mn

P was discussed. The glow peak parameters

such as activation energy and frequency factors

were determined by deconvoluting the glow curves with gerneral order kinetics equations. The dose responses to gamma rays in the dose range from 0.1 Gy to 20 kGy were obtained and fitted by the composite action dose response function. The one hit factors R obtained are 0.397 and 0.127 for 253℃ and 383℃ glow peaks respectively.