Search for the0+Member of the Two-Phonon Triplet inCd110

Abstract

Levels in $^{110}\mathrm{Cd}$ have been studied through the decay of $^{110g}\mathrm{Ag}({1}^{+})$ using NaI(Tl) and Ge(Li) detectors. The following $\ensuremath{\gamma}$-ray energies (intensities in parentheses) were observed: 657.8 \ifmmode\pm\else\textpm\fi{} 0.2(100), 815.6 \ifmmode\pm\else\textpm\fi{} 0.3(0.98), 1125.9 \ifmmode\pm\else\textpm\fi{} 0.3(0.36), 1186.4 \ifmmode\pm\else\textpm\fi{} 0.7(0.056), 1421.8 \ifmmode\pm\else\textpm\fi{} 1.3(0.044), 1475.8 \ifmmode\pm\else\textpm\fi{} 1.3(0.11), 1630.0 \ifmmode\pm\else\textpm\fi{} 1.2(0.048), 1674.2 \ifmmode\pm\else\textpm\fi{} 0.9(0.15), and 1783.3 \ifmmode\pm\else\textpm\fi{} 1.3(0.17) keV. Coincidence measurements performed with a NaI(Tl)-Ge(Li) system showed peaks at 816 and 1126 keV in coincidence with the 657.8-keV line. The 815.6-keV peak in the singles spectrum is a doublet composed of the 818.00-keV component depopulating the ${2}^{+}$ state at 1475 \ifmmode\pm\else\textpm\fi{} 0.05 keV and a 815.5-keV $\ensuremath{\gamma}$ ray. It is proposed that the low-energy component depopulates the twophonon, ${0}^{+}$ level at 1473.2 \ifmmode\pm\else\textpm\fi{} 0.3 keV. A level at 1783.6 \ifmmode\pm\else\textpm\fi{} 0.3 keV is also assigned and estimates of $log\mathrm{ft}$ values to all levels are given. Using a multichannel analyzer in the multiscalar mode, the half-life of $^{110g}\mathrm{Ag}$ was measured as 24.7 \ifmmode\pm\else\textpm\fi{} 0.7 sec.