Comprehensive studies of W-values for heavy charged particles in gases

用加速器的重离子束作为粒子能量的函数，测定了大气压下气体中重离子产生离子对的平均能量W。对于除He^<2+>以外的重离子，可以清楚地观察到W的能量依赖性，而He^<2+>的W在很宽的能量范围内近似恒定。我们还测量了W (W)的微分值，它几乎等于He^<2+>的W值。

The determination of W, an average energy to produce an ion pair, for heavy ions in gases at atmospheric pressures has been made using heavy-ion beams from an accelerator as a function of the particle energy. For heavy ions except for He^<2+>, the energy dependence of W was clearly observed, while W for He^<2+> was approximately constant over a wide range of the energy. The differential values of W (w) were also measured and are almost equal to the value of W for He^<2+>.