Role of diproton correlation in two-proton-emission decay of the Be6 nucleus

Tomohiro Oishi, Kouichi Hagino, and Hiroyuki Sagawa
Phys. Rev. C 90, 034303 – Published 4 September 2014

Abstract

We discuss a role of diproton correlation in two-proton emission from the ground state of a proton-rich nucleus, Be6. Assuming the three-body structure of α+p+p configuration, we develop a time-dependent approach in which the two-proton emission is described as a time evolution of a three-body metastable state. With this method, the dynamics of the two-proton emission can be intuitively discussed by monitoring the time dependence of the two-particle density distribution. With a model Hamiltonian which well reproduces the experimental two-proton decay width, we show that a strongly correlated diproton emission is a dominant process in the early stage of the two-proton emission. When the diproton correlation is absent, the sequential two-proton emission competes with the diproton emission, and the decay width is underestimated. These results suggest that the two-proton emission decays provide a good opportunity to probe the diproton correlation in proton-rich nuclei beyond the proton dripline.

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  • Received 14 April 2014

DOI:https://doi.org/10.1103/PhysRevC.90.034303

©2014 American Physical Society

Authors & Affiliations

Tomohiro Oishi1,2,3,4, Kouichi Hagino1,2, and Hiroyuki Sagawa5,6

  • 1Department of Physics, Tohoku University, Sendai 980-8578, Japan
  • 2Research Center for Electron Photon Science, Tohoku University, 1-2-1 Mikamine, Sendai 982-0826, Japan
  • 3Helsinki Institute of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland
  • 4Department of Physics, P.O. Box 35 (YFL), University of Jyväskylä, FI-40014 Jyväskylä, Finland
  • 5Center for Mathematics and Physics, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8560, Japan
  • 6RIKEN Nishina Center, Wako 351-0198, Japan

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Issue

Vol. 90, Iss. 3 — September 2014

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