论文标题
弹丸激发态对氢血浆中缓慢氦离子的停止的显着贡献
Significant Contribution of Projectile Excited States to the Stopping of Slow Helium Ions in Hydrogen Plasma
论文作者
论文摘要
能量沉积和原子过程（例如，在等离子体中缓慢重离子的电子捕获，电离，激发和辐射仪）仍然是一个未能解决的基本问题。在这里，我们在实验和理论上研究了100 keV = U氦离子在明确定义的氢等离子体中的停止。我们的精确测量结果显示的能量损失比常用有效电荷的半古典方法的预测要高得多。通过解决所有主要弹丸状态的时间依赖率方程（TDRE），对于所有相关的原子过程，我们的计算与实验数据非常吻合。我们还证明，弹丸激发态及其辐射衰减是电子捕获和电离的桥梁，可以显着影响平衡电荷状态，从而导致等离子体中离子停止的大幅增加。
The energy deposition and the atomic processes, such as the electron-capture, ionization, excitation and radiative-decays for slow heavy ions in plasma remains an unsolved fundamental problem. Here we investigate, both experimentally and theoretically, the stopping of 100 keV=u helium ions in a well-defined hydrogen plasma. Our precise measurements show a much higher energy loss than the predictions of the semi-classical approaches with the commonly used effective charge. By solving the Time Dependent Rate Equation (TDRE) with all the main projectile states and for all relevant atomic processes, our calculations are in remarkable agreement with the experimental data. We also demonstrated that, acting as a bridge for electron-capture and ionization, the projectile excited states and their radiative decays can remarkably influence the equilibrium charge states and consequently lead to a substantial increasing of the stopping of ions in plasma.
