Das β-spektrum des RaE

摘要: Abstract The β spectrum of RaE(Bi 210 ) has been measured with an iron-free magnetic lens β-ray spectrometer. A mixed ThB-RaE source was used. Calibration made the ThB conversion lines while RaE taken after decay activity. analysed help theory effective nuclear radii Fujita et al . Least square fits were performed, all matrix elements and term containing phase angle θ between vector axial coupling constants being treated as free parameters. With assumption a pure VA interaction found to be | − 180°| = (4.5±1.0)°, STPVA without Fierz interference (4.7 +2.1 −4.7 )°. stated errors are standard deviations only. results in agreement time reversal invariance. parameters X, Y αZ/2ϱ 1 (α × r 25.2, −1.64, 13.2, spectively.