Laser-enhanced electron-impact ionization spectroscopy
- 1 July 1986
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 11 (7) , 422-424
- https://doi.org/10.1364/ol.11.000422
Abstract
Sequential photon-excitation, electron-impact ionization with subsequent mass analysis has been applied to a barium atomic beam. High-resolution, Doppler-free laser excitation produces the 6s6p 1P1 excited state, which is then ionized by electron bombardment. The excited state is selectively ionized when bombardment energies are between the excited- and ground-state ionization thresholds. Mass discrimination has permitted the recording of individual optical spectra for all the stable isotopes, including the 0.1% abundant 130Ba and 132Ba, in a sample with natural isotopic abundances.Keywords
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