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Laser autoionization mass spectroscopy: the potential for single-atom detection

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Abstract

We describe a single-step photoionization scheme, based on the use of autoionizing resonances, which is used in the analysis of ytterbium nitrate samples. The cross section for the 6s2 1S0→5d6p 3D transition is 10−16 cm2, allowing optical saturation (~100 % ionization) over a rather large focal volume of ≳ 10−2 cm3 as well as providing elemental selectivity in the ionization process.

© 1982 Optical Society of America

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