Abstract
Oscillations observed by Frey et al. in the photodetachment cross section of Rb− near the 5p 1/2 threshold are shown to derive from a static external electric field of strengthF ≃ 1.3 V/cm. This field was used in the experiment to discriminate between slow and fast electrons, but it causes a quasiperiodic energy dependence just above threshold, with a maximum peak separation of roughly 0.1 cm−1.
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References
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