Messung des Asymmetrie-Koeffizienten der β-γ-Zirkularpolarisationskorrelation an erlaubten β-Übergängen

The asymmetry coefficient of theβ-circularly-polarizedγ-correlation of allowedβ-decays has been measured for several nuclides with high accuracy. The polarimeter was a new type. Here the magnet is used as Compton-scatterer and asβ-spectrometer at the same time with the advantage that one has four coincidence possibilities between twoγ- and twoβ-counters. The results of the measurements are the following: NuclidA Na²⁴ +0.102±0.006 Ar⁴¹ +0.066±0.025 Sc⁴⁶ +0.103±0.004 Ca⁴⁷ +0.383±0.018 V⁴⁸ ?0.059±0.010 Mn⁵² ?0.019±0.010 Co⁵⁶ +0.002±0.010 Co⁵⁹ ?0.106±0.023 Ag^110m +0.058±0.007 Cs¹³⁴ ?0.069±0.007 Fermi matrix elements are determined from these values and their physical implications are discussed.