Novel field-ionization behavior of very high Rydberg states of Ar (n = 50-250) is observed using sequential pulsed electric fields. Fast autoionization acts as a filter against adiabatic field ionization near the 2P1/2 threshold, whereas both diabatic and adiabatic field ionization occur near the 2P3/2 threshold. Sequences of up to 9 equivalent pulses yield recurrent field ionization signals near the 2P3/2 threshold, provided that the field returns close to zero between pulses, demonstrating ...Expand abstract
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Electric field ionization of high Rydberg states of Ar with sequences of identical pulses.
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