First Measurement of Pure Electron Shakeoff in the β Decay of Trapped 6He+ Ions

Abstract : The electron shakeoff probability of 6Li2+ ions resulting from the β- decay of 6He+ ions has been measured with high precision using a specially designed recoil ion spectrometer. This is the first measurement of a pure electron shakeoff following nuclear β decay, not affected by multielectron processes such as Auger cascades. In this ideal textbook case for the application of the sudden approximation, the experimental ionization probability was found to be Psoexp=0.023 39(36) in perfect agreement with simple quantum mechanical calculations.
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C. Couratin, P. Velten, X. Fléchard, E. Liénard, G. Ban, et al.. First Measurement of Pure Electron Shakeoff in the β Decay of Trapped 6He+ Ions. Physical Review Letters, American Physical Society, 2012, 108, pp.243201. ⟨10.1103/PhysRevLett.108.243201⟩. ⟨in2p3-00709325⟩

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