Abstract
The reduced transition probability of the first excited state in the nucleus was measured via Coulomb excitation in inverse kinematics at intermediate energies. A value of 0.173(28) was extracted from the absolute cross section on a Pb target. Feeding contributions in from higher lying states were estimated by a reference measurement of the stable . Corresponding only to a moderate decrease of excitation strength relative to the almost constant values observed in the proton-rich, even- isotopes, present state-of-the-art shell-model predictions, which include proton and neutron excitations across the shell closures as well as standard polarization charges, underestimate the experimental findings.
- Received 13 May 2013
- Revised 21 August 2014
DOI:https://doi.org/10.1103/PhysRevC.90.061302
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