论文标题
通过超易INTENSE X射线进行顺序多光子电离的简单模型
Simple model for sequential multiphoton ionization by ultra-intense x-rays
论文作者
论文摘要
提出了一个简单的通过超INTENSES X射线进行顺序多光子电离的模型。用脉冲能量的离子产量的衍生缩放量表定量地再现了实验数据，这表明离子产量根据多光子电离的“功率定律”行为增加，然后在高脉冲能量下饱和。发现在特定电荷状态下产生离子的电离之间计算出的平均时间间隔与脉冲持续时间成正比，并且与所有其他X射线脉冲参数无关。这与先前的研究一致，在这种研究中，发现分子的强烈X射线电离产生的碎片离子的动能与脉冲能无关，但由于电离之间的时间间隔较小而随着脉冲持续时间的增加而增加。
A simple model for sequential multiphoton ionization by ultra-intense x-rays is presented. The derived scaling of the ion yield with pulse energy quantitatively reproduces the experimental data, which shows that the ion yield increases according to the "power law" behavior typical of multiphoton ionization, followed by saturation at high pulse energies. The calculated average time interval between ionizations for producing ions at a certain charge state is found to be proportional to the pulse duration and independent of all other x-ray pulse parameters. This agrees with previous studies where the kinetic energy of fragment ions with a given charge state produced by intense x-ray ionization of molecules was found to be independent of the pulse energy, but to increase with smaller pulse duration due to the smaller time interval between ionizations.
