Study of mixed-symmetry excitations in 96Ru via inelastic proton-scattering

[摘要] Mixed-symmetry states of octupole (L 3) and hexadecapole (L 4) character have been recently proposed in the N 52 isotones92Zr and94Mo, based on strong M1 transitions to the lowest-lying 3-and 4+states, respectively. In order to investigate similar excitations in the heaviest stable N 52 isotone96Ru, two inelastic proton-scattering experiments have been performed at the Wright Nuclear Structure Laboratory (WNSL), Yale University, USA and the Institute for Nuclear Physics, University of Cologne, Germany. From the combined data of both experiments, absolute E1, M1, and E2 transition strengths were extracted, allowing for the identification of candidates for MS octupole and hexadecapole states. The structure of the low-lying 4+states is investigated by means of sdg-IBM-2 calculations.

[发布机构] Institut für Kernphysik, Universität zu Köln, Köln; D-50937, Germany^1;Wright Nuclear Structure Laboratory, Yale University, New Haven; CT; 06520, United States^2;Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt; D-64289, Germany^3;National Superconducting Cyclotron Laboratory NSCL, Michigan State University, East Lansing; MI; 48824, United States^4;Department of Physics, University of Surrey, Guildford; GU2 7XH, United Kingdom^5;Fundamental Fysik, Chalmers Tekniska Högskola, Göteborg; SE-41296, Sweden^6;University of Richmond, Richmond; VA; 23173, United States^7;National Institute for Physics and Nuclear Engineering, Bucharest-Magurele; RO-77125, Romania^8;Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia; BG-1784, Bulgaria; (10) ExtreMe Matter Institute EMMI and Research Division, GSI, Darmstadt; D-64291, Germany; (11) Frankfurt Institute for Advanced Studies FIAS, Frankfurt a.M.; D-60438, Germany^9

[关键词] Hexadecapole;Mixed symmetry state;Nuclear structure;Proton scattering;Transition strengths;Yale University