The LPCTrap experiment: measurement of the β-ν angular correlation in 6He+ decay using a transparent Paul trap

P. Velten (1) , G. Ban (1) , D. Dominique Durand (1) , X. Fléchard (1) , E. Liénard (1) , F. Mauger (1) , A. Méry (2) , O. Naviliat-Cuncic (1) , D. Rodríguez , J.C. Thomas (3)

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

The LPCTrap experiment is devoted to the precise measurement of the β-ν angular correlation parameter, a βν , in the pure Gamow-Teller decay of 6He+. This experiment is motivated by the search of the presence of tensor type contributions in the weak interaction. The radioactive source is confined in a transparent Paul trap installed at LIRAT, the low energy beam line of the SPIRAL facility. The β-ν correlation is studied by measuring the time of flight of the recoil ions detected in coincidence with the β particles. During the last experiment, a total of 4 × 106 coincidence events have been recorded which would enable to determine the coefficient with a statistical uncertainty of 0.5%. The status of the analysis is presented in this contribution.

Mots clés: Ion trapping; Precision measurement; β-ν correlation

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

P. Velten, G. Ban, D. Dominique Durand, X. Fléchard, E. Liénard, et al.. The LPCTrap experiment: measurement of the β-ν angular correlation in 6He+ decay using a transparent Paul trap. 5th International Conference on Trapped Charged Particles and Fundamental Physics (TCP), Apr 2010, Saariselka, Finland. pp.29-38, ⟨10.1007/s10751-011-0298-4⟩. ⟨in2p3-00606331⟩