Decay ofNi66

A study of the beta and gamma spectra of the nuclide ${\mathrm{Ni}}^{66}$ has been made. This isotope decays by a single beta ray of 0.20±0.03 Mev, with no associated gammas, to the ground state of ${\mathrm{Cu}}^{66}$. Both the $log\mathrm{}\left(\mathrm{ft}\right)\mathrm{}$ value and the shape of the Kurie plot indicate that this transition is allowed, thereby confirming the earlier spin and parity assignments of the ground state of ${\mathrm{Cu}}^{66}$, and the 1.03-Mev excited level in ${\mathrm{Zn}}^{66}$.