Pygmy dipole resonance in Ce140 via inelastic scattering of O17

M. Krzysiek et al.
Phys. Rev. C 93, 044330 – Published 25 April 2016

Abstract

The γ decay from the high-lying states of Ce140 excited via inelastic scattering of O17 at a bombarding energy of 340 MeV was measured using the high-resolution AGATA-demonstrator array in coincidence with scattered ions detected in two segmented ΔEE silicon detectors. Angular distributions of scattered ions and emitted γ rays were measured, as well as their differential cross sections. The excitation of 1 states below the neutron separation energy is similar to the one obtained in reactions with the α isoscalar probe. The comparison between the experimental differential cross sections and the corresponding predictions using the distorted-wave Born approximation allowed us to extract the isoscalar component of identified 1 pygmy states. For this analysis the form factor obtained by folding microscopically calculated transition densities and optical potentials was used.

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  • Received 22 December 2015

DOI:https://doi.org/10.1103/PhysRevC.93.044330

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

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Vol. 93, Iss. 4 — April 2016

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