The angular correlation coefficients in the allowed beta decays of ${\mathrm{He}}^6$, ${\mathrm{Ne}}^{19}$, ${\mathrm{Ne}}^{23}$, and ${\mathrm{A}}^{35}$ have been experimentally determined from measurements of the energy spectra of the recoil ions. The form of the beta-decay interaction has been deduced from these measurements. The experimental results are summarized in the following table together with the beta-decay interaction forms which are indicated by each measurement. It is apparent from the last column that the experimental results are consistent if we assume that the dominant beta-decay interaction is the $\mathrm{VA}$ combination.

• Received 13 April 1959

DOI:https://doi.org/10.1103/PhysRev.116.134