The decay of 20Na: Measurements of isospin mixing and the weak vector coupling constant as well as other new decay data Academic Article uri icon


  • Kinematic shifts of particles from the + delayed decay of 20Na have been measured as a function of the energy of the coincident + particles. Beta-neutrino-alpha triple-correlation coefficients were determined for six + transitions from 20Na(J, T = 2+, 1) to excited 2+ states in 20Ne; ft values were also deduced. For the superallowed 2+ 2+ transition to the T = 1 analogue state in 20Ne the results yielded a measurement of the vector weak coupling constant, G'V/(c)3 = (1.1030.028) 10-5GeV-2. For the other five (allowed Gamow-Teller) transitions, limits were established for the vector (Fermi) component and, from them, limits deduced on isospin mixing amplitudes for the daughter states in 20Ne. Weak, previously unknown, -transitions were assigned to the decay of 20Na based on the observation of new groups and one new -transition. 1989.

published proceedings

  • Nuclear Physics A

author list (cited authors)

  • Clifford, E., Hagberg, E., Hardy, J. C., Schmeing, H., Azuma, R. E., Evans, H. C., ... Towner, I. S.

citation count

  • 39

complete list of authors

  • Clifford, ETH||Hagberg, E||Hardy, JC||Schmeing, H||Azuma, RE||Evans, HC||Koslowsky, VT||Schrewe, UJ||Sharma, KS||Towner, IS

publication date

  • March 1989