TrappedIons.org

S. Van Gorp

Electron shakeoff following the ?+ decay of trapped 35Ar+ ions

C. Couratin [1], X. Fabian [1], B. Fabre [2], B. Pons [2,1], X. Fléchard, E. Liénard, G. Ban [1], M. Breitenfeldt [3], P. Delahaye [4], D. Durand [1,5], A. Méry, O. Naviliat-Cuncic [1,6], T. Porobic [3,1,7], G. Quéméner, D. Rodriguez, N. Severijns [3,4], J. C. Thomas, S. Van Gorp [8]

Abstract

The electron shakeoff of $^{35}$Cl atoms resulting from the $β$$^+$ decay of $^{35}$Ar$^+$ ions has been investigated using a Paul trap coupled to a recoil-ion spectrometer. The charge-state distribution of the recoiling daughter nuclei is compared to theoretical calculations accounting for shakeoff and Auger processes. The calculations are in excellent agreement with the experimental results and enable to identify the ionization reaction routes leading to the formation of all charge states.

First detection and energy measurement of recoil ions following beta decay in a Penning trap with the WITCH experiment

M. Beck [1], S. Coeck [2], V. Yu. Kozlov, M. Breitenfeld [2], P. Delahaye [3], P. Friedag [1], M. Herbane [2], A. Herlert [3,2], I. S. Kraev, J. Mader [1], M. Tandecki [2], S. Van Gorp [2], F. Wauters [2], Ch. Weinheimer [1], F. Wenander [3], N. Severijns [2]

Abstract

The WITCH experiment (Weak Interaction Trap for CHarged particles) will search for exotic interactions by investigating the beta-neutrino angular correlation via the measurement of the recoil energy spectrum after beta decay. As a first step the recoil ions from the beta-minus decay of 124In stored in a Penning trap have been detected. The evidence for the detection of recoil ions is shown and the properties of the ion cloud that forms the radioactive source for the experiment in the Penning trap are presented.