反质子在H、H2和He靶中的阻止本领
Stopping power of antiprotons in H, H2, and He targets
摘要：
在1 keV ~ 6.4 MeV的能量范围内，计算了反质子在氢原子和氢分子以及氦原子中的阻止本领。在H2和He的情况下，用以靶为中心的单活性电子模型描述靶。碰撞过程用紧耦合的碰撞参数法处理。本研究结果与理论和实验文献数据进行了广泛的比较，以评估部分不一致的理论和实验数据是最可靠的。此外，一阶停止数的修正的大小，转移到目标电子的平均能量，以及激发和电离过程的能量损失的弹丸的相对重要性被确定。最后，直接比较了H、H2和He靶的阻止本领，揭示了三种靶的具体相似性和差异。
英文摘要：
The stopping power of antiprotons in atomic and molecular hydrogen as well as helium was calculated in an impact-energy range from 1 keV to 6.4 MeV. In the case of H2 and He the targets were described with a single-active electron model centered on the target. The collision process was treated with the close-coupling formulation of the impact-parameter method. An extensive comparison of the present results with theoretical and experimental literature data was performed in order to evaluate which of the partly disagreeing theoretical and experimental data are most reliable. Furthermore, the size of the corrections to the first-order stopping number, the average energy transferred to the target electrons, and the relative importance of the excitation and the ionization process for the energy loss of the projectile was determined. Finally, the stopping power of the H, H2, and He targets were directly compared revealing specific similarities and differences of the three targets.
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