Coincident excitation and radiative decay in electron-nucleus collisions

D. H. Jakubassa-Amundsen and V. Yu. Ponomarev
Phys. Rev. C 95, 024310 – Published 8 February 2017

Abstract

The distorted-wave Born approximation formalism for the description of the (e,eγ) reaction, in which emitted photons and scattered electrons are simultaneously detected, is outlined. Both the Coulomb and the magnetic scattering are fully taken into account. The influence of electron bremsstrahlung is estimated within the plane-wave Born approximation. Recoil effects are also discussed. The formalism is applied for the low-energy (e,eγ)Zr92 reaction with excitation of the first collective (21+) and mixed-symmetry (22+) states. The corresponding transition charge and current densities are taken from a random-phase approximation (RPA) calculation within the quasiparticle phonon model. It is shown, by this example, in which way the magnetic subshell population of the excited state influences the angular distribution of the decay photon. For these quadrupole excitations the influence of magnetic scattering is only prominent at the backmost scattering angles, where a clear distinction of the photon pattern pertaining to the two states is predicted.

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  • Received 10 September 2016

DOI:https://doi.org/10.1103/PhysRevC.95.024310

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

D. H. Jakubassa-Amundsen1 and V. Yu. Ponomarev2

  • 1Mathematics Institute, University of Munich, Theresienstrasse 39, 80333 Munich, Germany
  • 2Institute of Nuclear Physics, Technical University of Darmstadt, 64289 Darmstadt, Germany

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Issue

Vol. 95, Iss. 2 — February 2017

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