Accretion and radiation in black hole with a global monopole

In this paper, we study on mass-defect effect in the black hole with a global monopole, calculate the mass defect of the neutral particle adsorbed by the central mass(or falling down to the central mass), and then compute the mass defect of the adsorbing homogeneous spherical shell and the solid sphere in the limit case. Finially, the mass defects of these substances are converted into the energy radiations.