Simulation of momentum flux ratios in the cascade in the sputtering of 92Mo100Mo

Momentum flux ratios (Mo-92/Mo-100) towards the surface and the bulk through marker planes have been studied by a static Monte Carlo simulation program for an isotopic mixture Mo-92(0).Mo-100(5)0.5 bombarded with 5 keV Xe ions. The calculations show that the momentum flux ratios in the cascade deviate far from one at different surface depths. The calculations also show that the zero-fluence isotopic ratio in the near-normal direction and its difference between small and large polar emission angles are positive.