Abstract

Ionization of two-photon excited states \(5p^{\mathrm {5}}(^{\mathrm {2}}P_{\mathrm {3/2}})6\hbox {p}[^{\mathrm {3}}/_{\mathrm {2}}\), \(^{\mathrm {5}}/_{\mathrm {2}}]_{\mathrm {2}}\), \(\hbox {M}=2\) (jl-coupling) of xenon atoms by circularly polarized probe light was studied experimentally in a supersonic beam. The observed photoionization signals revealed oscillation structure due to the Larmor precession of atomic states in an external magnetic field. We derived analytical formulas for the photoelectron current and explained the diversity in the structure of the detected oscillations in terms of the principal lines among multiplet components of optical transitions. The obtained numerical data demonstrate collapse and revival (beating) behavior of the photocurrent due to nonlinearity of Zeeman shifts in the presence of the Paschen–Back effect. Our results indicate the possibility of implementing Doppler-free spectroscopy involving bound-free transitions.

Graphic abstract

中文翻译：

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Xe极化原子态在磁场中的崩溃

摘要

两光子激发态的电离\（5p ^ {\ mathrm {5}}（^ {\ mathrm {2}} P _ {\ mathrm {3/2}}）6 \ hbox {p} [^ {\ mathrm { 3}} / _ {\ mathrm {2}} \），\（^ {\ mathrm {5}} / _ {\ mathrm {2}}] _ {\ mathrm {2}} \），\（\ hbox {M} = 2 \）（jl在超声束中实验研究了氙原子与圆偏振探针光的耦合）。观察到的光电离信号显示出由于外部磁场中原子态的拉莫尔进动而引起的振荡结构。我们导出了光电子电流的解析公式，并根据光学跃迁的多重分量之间的主线解释了检测到的振荡结构的多样性。所获得的数值数据表明，在存在Paschen-Back效应的情况下，由于塞曼位移的非线性导致光电流的崩溃和恢复（跳动）行为。我们的结果表明，实现包含无界跃迁的无多普勒光谱的可能性。

图形摘要