Analysis for spallation fragment of p + 208Pb by using MSDM

The level density of Ignatyuk formula is introduced into the Many Stages Dynamics Model (MSDM) instead of Fermi-gas formula to improve the simulation of spallation fragments. The results of MSDM with Ignatyuk formula reproduced the experimental data well for the mass and charge distributions, the formation cross sections of isotopic product of proton-induced spallation of 208Pb. The calculations are in agreement with the experimental data and better than some simulations by MSDM with Fermi gas formula of level density, also better than some calculations by QMD + SDM, QMD + FISSION, LAHET and YIELDX etc. (authors)