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Intermediate-energy Coulomb excitation of Sn104: Moderate E2 strength decrease approaching Sn100

P. Doornenbal et al.
Phys. Rev. C 90, 061302(R) – Published 12 December 2014

Abstract

The reduced transition probability B(E2) of the first excited 2+ state in the nucleus Sn104 was measured via Coulomb excitation in inverse kinematics at intermediate energies. A value of 0.173(28) e2b2 was extracted from the absolute cross section on a Pb target. Feeding contributions in Sn104 from higher lying states were estimated by a reference measurement of the stable Sn112. Corresponding only to a moderate decrease of excitation strength relative to the almost constant values observed in the proton-rich, even-A Sn106114 isotopes, present state-of-the-art shell-model predictions, which include proton and neutron excitations across the N=Z=50 shell closures as well as standard polarization charges, underestimate the experimental findings.

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  • Received 13 May 2013
  • Revised 21 August 2014

DOI:https://doi.org/10.1103/PhysRevC.90.061302

©2014 American Physical Society

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Vol. 90, Iss. 6 — December 2014

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