Reconstruction of a 6-MeV bremsstrahlung spectrum by multi-layer absorption based on LiF:Mg,Cu, P

In this paper, TLD(LiF: Mg, Cu, P) is used as detector. A multi-layer absorption(MLA) model is designed. Combined with Monte-Carlo processes, a bremsstrahlung X-ray spectrum is reconstructed by an iterative method; the reconstructed results agree with the results of simulations by the MCNP process essentially, especially in middle energy region.