Rydberg levels in atomic calcium are of interest due to their use in highly isotope selective multiple-step resonance ionisation spectrometry, and also for nuclear physics investigations, but gaps remain in the data for higher lying levels in calcium isotopes other than . We report novel isotope shift data on four isotopes of calcium (, , , ), relative to the majority abundance isotope , in six Rydberg transitions for each P (n = 25–30) and F (n = 23–28) angular momentum quantum number designated series.

中文翻译：

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共振电离光谱法测量原子钙Rydberg同位素位移

原子钙的Rydberg含量之所以引起人们的关注，是因为它们在高度同位素选择性多步共振电离光谱学中的应用以及核物理研究，但除之外，钙同位素中较高含量的数据仍存在差距。我们对钙的四种同位素报告新颖同位素位移数据（，，，），相对于所述多数丰度同位素，在每个6个里德伯转变P（Ñ = 25-30）和˚F（Ñ = 23-28）的角动量量子编号指定系列。