论文标题
Xe $^{54+}的电子捕获与H $ {_ 2} $分子的碰撞在5.5 meV/u和30.9 MeV/u之间
Electron capture of Xe$^{54+}$ in collisions with H${_2}$ molecules in the energy range between 5.5 MeV/u and 30.9 MeV/u
论文作者
论文摘要
研究了电子捕获过程的Xe $^{54+} $与Darmstadt GSI的ESR存储环内部气体目标相撞的H $ _2 $分子。电子捕获到激发的弹丸状态的横截面值是从观察到的莱曼辐射的发射横截面推导的，莱曼辐射的发射横截面是由捕获靶电子后的氢样离子发出的。通过应用ESR的减速模式，离子束能量范围在5.5 MeV/U和30.9 MeV/U之间变化。因此，电子捕获数据记录在中级，尤其是低碰撞能状态，远低于产生裸露氙气离子所需的梁能量。发现所获得的数据与理论方法符合合理的定性一致性，而通常应用的经验公式显着高估了实验发现。
The electron capture process was studied for Xe$^{54+}$ colliding with H$_2$ molecules at the internal gas target of the ESR storage ring at GSI, Darmstadt. Cross section values for electron capture into excited projectile states were deduced from the observed emission cross section of Lyman radiation, being emitted by the hydrogen-like ions subsequent to the capture of a target electron. The ion beam energy range was varied between 5.5 MeV/u and 30.9 MeV/u by applying the deceleration mode of the ESR. Thus, electron capture data was recorded at the intermediate and in particular the low collision energy regime, well below the beam energy necessary to produce bare xenon ions. The obtained data is found to be in reasonable qualitative agreement with theoretical approaches, while a commonly applied empirical formula significantly overestimates the experimental findings.
