Phys.Rev. C 94, 025503 (2016)

A.Sytema, J.E.van den Berg, O.Boll, D.Chernowitz, E.A.Dijck, J.O.Grasdijk, S.Hoekstra, K.Jungmann, S.C.Mathavan, C.Meinema, A.Mohanty, S.E.Muller, J.P.Noordmans, M.Nunez Portela, C.J.G.Onderwater, C.Pijpker, R.G.E.Timmermans, K.K.Vos, L.Willmann, H.W.Wilschut

Test of Lorentz invariance in β decay of polarized ²⁰Na

RADIOACTIVITY ²⁰Na(β⁺)[polarized ²⁰Na source from ¹H(²⁰Ne, n), E=20 MeV/nucleon at AGOR-KVI cyclotron facility, polarization by optical pumping]; measured Eβ, Iβ, Eγ, Iγ, polarization, dependence of half-life of ²⁰Na nuclei on the nuclear spin direction; deduced no significant violation of Lorentz invariance (LIV) in weak interactions.

doi: 10.1103/PhysRevC.94.025503