Abstract
In addition to the well-established quadrupole mixed-symmetry states, octupole and hexadecapole excitations with mixed-symmetry character have been recently proposed for the N = 52 isotones 92Zr and 94Mo. We performed two inelastic proton-scattering experiments to study this kind of excitations in the heaviest stable N = 52 isotone 96Ru. From the combined experimental data of both experiments absolute transition strengths were extracted.
Highlights
2 ExperimentsThe determination of absolute transition strengths requires the measurement of spins and parities of excited states, γ-decay branching ratios, multipole mixing ratios, and nuclear level lifetimes
The collective structure of low-lying states in near-spherical, vibrational nuclei is dominated by the quadrupole degree of freedom
The identification is based on remarkably strong M1 transitions between the lowest-lying 3− and 4+ states
Summary
2 ExperimentsThe determination of absolute transition strengths requires the measurement of spins and parities of excited states, γ-decay branching ratios, multipole mixing ratios, and nuclear level lifetimes. The collective structure of low-lying states in near-spherical, vibrational nuclei is dominated by the quadrupole degree of freedom. Mixed-symmetry quadrupole excitations in vibrational nuclei are well established as collective features near closed shells [6].
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