Binary encounter peaks for 0° electrons in collisions of 0.8 MeV/amu Biq+ with H2 and He

The binary encounter electrons produced in 167 MeV Biq+ on H2 and He collisions were measured at zero degrees with respect to the beam direction. In this paper, we present the initial projectile charge (qi) dependence of the intensity of the binary encounter electrons in the region of qi/Z1<0.4, Z1 projectile atomic number. In the case of the heavy projectile and in this qi region, the intensity of the binary encounter electrons increase as the qi increases. The peak energy shift of the binary encounter electrons is explained by the Bohr‐Lindhard model.