Interplay between sequential and prompt two-proton decay from the first excited state of Ne16

K. W. Brown, R. J. Charity, L. G. Sobotka, L. V. Grigorenko, T. A. Golubkova, S. Bedoor, W. W. Buhro, Z. Chajecki, J. M. Elson, W. G. Lynch, J. Manfredi, D. G. McNeel, W. Reviol, R. Shane, R. H. Showalter, M. B. Tsang, J. R. Winkelbauer, and A. H. Wuosmaa
Phys. Rev. C 92, 034329 – Published 30 September 2015

Abstract

The first excited, Jπ=2+ state of Ne16 at E*=1.69(2) MeV is well populated in neutron knockout reactions with a Ne17 beam and the correlations between the momenta of the three final fragments following 2p decay were measured. The correlation pattern showed aspects of both sequential and diprotonlike decay, which were reproduced in three-body O14 + p+p calculations. These calculations suggest that interference between these processes is responsible for the observed features which can be described in terms of a “tethered decay mechanism.” The intrinsic width of this state was constrained to be from 100 to 250 keV. Higher excited states populating the N13 + p+p+p exit channel were found at E*=8.37(10) and 10.76(20) MeV.

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  • Received 14 July 2015

DOI:https://doi.org/10.1103/PhysRevC.92.034329

©2015 American Physical Society

Authors & Affiliations

K. W. Brown1, R. J. Charity1,*, L. G. Sobotka1, L. V. Grigorenko2,3,4, T. A. Golubkova5, S. Bedoor6,7, W. W. Buhro8, Z. Chajecki8,†, J. M. Elson1, W. G. Lynch8, J. Manfredi8, D. G. McNeel6,7, W. Reviol1, R. Shane8, R. H. Showalter8, M. B. Tsang8, J. R. Winkelbauer8, and A. H. Wuosmaa6,7

  • 1Departments of Chemistry and Physics, Washington University, St. Louis, Missouri 63130, USA
  • 2Flerov Laboratory of Nuclear Reactions, JINR, RU-141980 Dubna, Russia
  • 3National Research Nuclear University “MEPhI”, Kashirskoye shosse 31, RU-115409 Moscow, Russia
  • 4National Research Centre “Kurchatov Institute”, Kurchatov sq. 1, RU-123182 Moscow, Russia
  • 5Advanced Educational and Scientific Center, Moscow State University, Kremenchugskaya 11, RU-121357 Moscow, Russia
  • 6Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA
  • 7Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USA
  • 8National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA

  • *charity@wustl.edu
  • Present address: Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USA.

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Vol. 92, Iss. 3 — September 2015

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