ELECTRONIC STOPPING POWER AND EFFECTIVE CHARGE OF HEAVY ION-BEAM IN HOT TARGETS
重离子束在热靶中的电子阻止本领与有效电荷数

Using linear-response dielectric theory, we have investigated the electronic stopping power and effective charge of heavy ionbeams in hot targets. For considering the charge distribution of the electrons bound to the projectile, the theoretical model of Brandt-Kitagawa is generali-zed to the situation of hot target. In the case of low and high velocities, the analytical expres-sions of the electronic stopping power and the effective charge are obtained, respectively. For low-velocity ion, it has been shown that the values of the effective charge are increased as the values of the electron gas temperature are increased. In certain temperarure range the values of the stopping power in the hot target are increased comparing with that in the cold target. For high-velocity ions in the hydrogen plasma, the theoretical values of the stopping power obtained in present work agree very well with experimental data.