The β-delayed γ-ray spectroscopy of neutron-rich 123;125 Ag isotopes is investigated at the Radioactive Isotope Beam Factory of RIKEN, and the long-predicted 1=2 − β-emitting isomers in 123;125 Ag are identified for the first time. With the new experimental results, the systematic trend of energy spacing between the lowest 9=2 þ and 1=2 − levels is extended in Ag isotopes up to N ¼ 78, providing a clear signal for the reduction of the Z ¼ 40 subshell gap in Ag towards N ¼ 82. Shell-model calculations with the state-of-theart V MU plus M3Y spin-orbit interaction give a satisfactory description of the low-lying states in 123;125 Ag.
A cluster-transfer experiment of 9 Be( 9 Be, 14 C → α+ 10 Be)α at an incident energy of 45 MeV was carried out in order to investigate the molecular structure in high-lying resonant states in 14 C. This reaction is of extremely large Q-value, making it an excellent case to select the reaction mechanism and the final states in outgoing nuclei. The high-lying resonances in 14 C are reconstructed for three sets of well discriminated final states in 10 Be. The results confirm the previous decay measurements with clearly improved decay-channel selections and show also a new state at 23.5(1) MeV. The resonant states at 22.4(3) and 24.0(3) MeV decay primarily into the typical molecular states at about 6 MeV in 10 Be, indicating a well developed cluster structure in these high-lying states in 14 C. Further measurements of more states of this kind are suggested.
High-spin states of ll5In have been studied using the ll4Cd (7Li, a2n) reaction at a beam energy of 48 MeV. A total of 13 new transitions have been observed and added to the level scheme of ll5In. Most ol the states in ll5In can be interpreted in terms of the weak coupling of a g9/2 proton hole to the core states ol 1 l('Sn or a g1/2 proton to the core states of ll4Cd. A A / = 1 band with the 7r(^9/2)_1 ® v(h l:/2)2 configuration was suggested as an oblate band built on the "stapler" mechanism with the aid of the tilted axis cranking model based on covariant density functional theory,
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