N=90 region: The decays of {152m,g}Eu to 152Sm

Abstract

The decays of {152m,g}Eu to 152Sm have been studied by gamma-ray spectroscopy using the 8pi Spectrometer, an array of 20 Compton-suppressed Ge detectors. Very weak gamma-decay branches in 152Sm were investigated through gamma-gamma coincidence spectroscopy. All possible E2 transitions between states below 1550 keV with transition energies > 130 keV are observed, including the previously unobserved 2^+_3 to 0^+_2 401 keV transition. The results, combined with existing lifetime data, provide a number of new or revised E2 transition strengths which are critical for clarifying the collective structure of 152Sm and the N=90 isotones.

arXiv comment37 pages, 8 figures, 7 tables. Discussion significantly expanded: added comparisons of nine collective models to experimental data (excitation energies, B(E2), isomer shift, rho^2(E0))

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• Sequence of Potentials Interpolating between the U(5) and E(5) Symmetries
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Cited by in corpus (6)

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• Search for Intrinsic Excitations in 152Sm
• Shape coexistence in even-even nuclei: A theoretical overview
• Observation of $\gamma$-vibrations and alignments built on non-ground-state configurations in 156Dy
• Detailed spectroscopy of ${}^{46}$Ca: A study of the ${\beta }^{-}$ decay of ${}^{46}$K
• Decay spectroscopy of ${}^{50}$Sc and ${}^{50m}$Sc to ${}^{50}$Ti