One- and two-neutron removal cross sections of O24

D. A. Divaratne, C. R. Brune, H. N. Attanayake, T. Baumann, D. Bazin, A. Gade, S. M. Grimes, P. M. King, M. Thoennessen, and J. A. Tostevin
Phys. Rev. C 98, 024306 – Published 13 August 2018

Abstract

Cross sections of one- and two-neutron removal reactions of O24, leading to the O23(12+) ground state and to bound final states of O22, have been measured at the National Superconducting Cyclotron Laboratory. The experiment was conducted using the S800 spectrograph and a O24 beam energy of 92.3 MeV/u. The measured O23 ground state and O22 inclusive cross section values, of 74(11) and 146(33) mb, respectively, are in good agreement with calculations using eikonal reaction dynamics and shell-model nuclear structure overlaps. The widths at half maximum of the associated parallel momentum distributions of these cross sections, deduced from Gaussian fits, are 115(13) MeV/c for O23 and 309(36) MeV/c for O22 in the projectile rest frame. The data and calculations strongly support the shell-model description of O24 as a spherical, doubly-magic structure.

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  • Received 8 March 2018
  • Revised 26 June 2018

DOI:https://doi.org/10.1103/PhysRevC.98.024306

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

D. A. Divaratne1,2, C. R. Brune1, H. N. Attanayake1, T. Baumann3, D. Bazin3, A. Gade3,4, S. M. Grimes1, P. M. King1, M. Thoennessen3,4, and J. A. Tostevin5

  • 1Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
  • 2Department of Physics, Miami University, Oxford, Ohio 45056, USA
  • 3National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 4Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
  • 5Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom

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Issue

Vol. 98, Iss. 2 — August 2018

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