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Physical Review Letters 108 (2012) 243201
First Measurement of Pure Electron Shakeoff in the β Decay of Trapped 6He+ Ions
C. Couratin1, P. Velten1, X. Fléchard1, E. Liénard1, G. Ban1, A. Cassimi2, P. Delahaye, D. Durand1, D. Hennecart2, F. Mauger1, A. Méry2, O. Naviliat-Cuncic1, Z. Patyk, D. Rodríguez, K. Siegień-Iwaniuk, J.C. Thomas3

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.
1 :  LPCC - Laboratoire de Physique Corpusculaire de Caen
2 :  CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique
3 :  GANIL - Grand Accélérateur National d'Ions Lourds
Interactions fondamentales
Physique/Physique Nucléaire Expérimentale
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ShakeOff6He-1.pdf(2.2 MB)