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Electron affinity of selenium measured by photodetachment microscopy

The electron affinity eA(Se) of selenium is measured by photodetachment microscopy on a cesium-sputtering-produced Se ion beam using a single-mode CW dye laser. The measured value of the electron affinity is 16 297.276(9) cm−1, or 2.020 604 6(11) eV, which improves the accuracy of this atomic quantity by a factor of 60.


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CNRS Ecole Polytechnique Sorbonne Université Université Paris-Saclay Observatoire de Paris
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