Electron shakeoff following the \b{eta}+ decay of 19Ne+ and 35Ar+ trapped ions

TL;DR

This study investigates electron shakeoff phenomena following ta+ decay of trapped 19Ne+ and 35Ar+ ions, comparing experimental charge distributions with theoretical models, revealing limitations in current approximations for low atomic number systems.

Contribution

It provides experimental data on electron shakeoff in ta+ decay and highlights the need for improved theoretical models including electron-electron correlations.

Findings

Excellent agreement for 35Cl charge distribution

Discrepancy observed for 19F, indicating model limitations

Suggests need for more accurate calculations with electron correlations

Abstract

The electron shakeoff of 19F and 35Cl atoms resulting from the \b{eta}+ decay of 19Ne+ and 35Ar+ ions has been investigated using a Paul trap coupled to a time of flight recoil-ion spectrometer. The charge-state distributions of the recoiling daughter nuclei were compared to theoretical calculations based on the sudden approximation and accounting for subsequent Auger processes. The excellent agreement obtained for 35Cl is not reproduced in 19F. The shortcoming is attributed to the inaccuracy of the independent particle model employed to calculate the primary shakeoff probabilities in systems with rather low atomic numbers. This calls for more elaborate calculations, including explicitly the electron-electron correlations.