We report on a measurement of several n = 3 → n = 2 inner-shell transitions in sodiumlike, magnesiumlike, and aluminumlike europium, performed at the EBIT-I electron beam ion trap facility at the Lawrence Livermore National Laboratory using an x-ray calorimeter. Although the inner-shell x-ray lines of such M-shell ions are typically dominated by electric dipole allowed transitions, we have also identified a weak feature that appears to be the result of electric quadrupole decay in sodiumlike Eu 52+ . We compare the measured transitions energies to the calculated values obtained using the flexible atomic code. We find agreement in most cases within 2 eV or better.

中文翻译：

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LLNL EBIT上内壳中Na，Mg和Al样excited的激发水平的测量

我们报告了在劳恩斯利弗莫尔国家实验室的EBIT-1电子束离子阱设备上使用X射线量热计对钠，镁和铝aluminum中的几个n = 3→n = 2内壳转变进行的测量。尽管此类M壳离子的内壳X射线线通常由电偶极子允许的跃迁控制，但我们也已经确定了一个弱点，它似乎是钠样Eu 52+中电四极子衰变的结果。我们将测得的跃迁能量与使用弹性原子编码获得的计算值进行比较。在大多数情况下，我们发现一致性在2 eV或更好。