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  1. The 116,118,120,122,124In nuclei have been popu- lated as fission fragments in reactions induced by heavy ions. Level schemes have been built from γ-rays detected using the Gammasphere array. Medium-spin states of 118,120In69,71 nuclei have been identified for the first time, while the level schemes of 116,122,124In67,73,75 were enriched. The observed states at lower excitations and at medium spin can be described by the coupling of the proton g9/2 hole to the neutron or neutron-hole in the h11/2 orbital. This coupling can now be followed in all odd-odd In isotopes from 104In to 126In 
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    Free, publicly-accessible full text available January 1, 2027
  2. High-spin structures of holmium ( Z=67 ) and erbium ( Z=68 ) isotopes are presented near mass 160, a region where collective and single-particle modes of excitation compete in the generation of angular momentum at the highest experimentally attainable spins in atomic nuclei. The level schemes of the Ho156,157,158 isotopes have been significantly extended, reaching spins in the 40 to 55 range, through multiple experiments utilizing the Gammasphere spectrometer. In particular, several new noncollective band-terminating states are reported for these nuclei. The nature of these states, including both valence-space terminations and core-excited oblateconfigurations, is discussed in terms of proton particle-hole (p-h) excitations across the semimagic Z=64 shell closure. Cranked-Nilsson–Strutinsky (CNS) calculations have been used to interpret the nature of these noncollective states. The corresponding terminating states in Er154159 are also included, providing a systematic description of band termination in this mass region. In addition, three weak rotational structures have been assigned to Ho157 at the highest spins. These collective bands are proposed to be based on a triaxial strongly deformed nuclear shape, involving neutron p-h excitations across the N=82 shell gap. 
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    Free, publicly-accessible full text available June 1, 2027
  3. Abstract Lifetimes of higher-lying states ($$2_2^+$$ 22+ and$$4_1^+$$ 41+ ) in$$^{16}$$ 16 C have been measured, employing the Gammasphere and Microball detector arrays, as key observables to test and refine ab initio calculations based on interactions developed within chiral Effective Field Theory. The presented experimental constraints to these lifetimes of$$\tau ({2_2^+}) = [\,244, 446]\,~\textrm{fs}$$ τ (22+) = [244,446] fs and$$\tau ({4_1^+}) = [\,1.8, 4]\,~\textrm{ps}$$ τ (41+) = [1.8,4] ps , combined with previous results on the lifetime of the$$2_1^+$$ 21+ state of$$^{16}$$ 16 C, provide a rather complete set of key observables to benchmark the theoretical developments. We present No-Core Shell-Model calculations using state-of-the-art chiral 2- (NN) and 3-nucleon (3N) interactions at next-to-next-to-next-to-leading order for both the NN and the 3N contributions and a generalized natural-orbital basis (instead of the conventional harmonic-oscillator single-particle basis) which reproduce, for the first time, the experimental findings remarkably well. The level of agreement of the new calculations as compared to the CD-Bonn meson-exchange NN interaction is notable and presents a critical benchmark for theory. 
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