U234levels fed in theNp234electron capture decay

The decay of ${}_{}{}^{234}{}_{}{}^{}\mathrm{Np}$ has been investigated using a coaxial Ge(Li) detector. The source prepared by the ${}_{}{}^{235}{}_{}{}^{}\mathrm{U}$(d,3n) reaction was purified from fission products by radiochemical separation. The analysis of the $\gamma$ ray spectra revealed the presence of 59 photon lines, 29 of which were found for the first time. The absolute values of $\gamma$, EC, and ${\beta }^{+}$ intensities were deduced from Ux-$K$ ray intensity. A ${}_{}{}^{234}{}_{}{}^{}\mathrm{U}$ decay scheme is suggested on the basis of the good sum relationships. Accurate values of 17 low-spin-energy levels are given, 6 of which were previously unreported in the ${}_{}{}^{234}{}_{}{}^{}\mathrm{Np}$ decay: 849.36(${03}^{-}$), 926.33(${22}^{+}$), 989.41(${22}^{-}$), 1457.1(${12}^{-}$), 1500.88(1), and 1510.22(1) keV.