Two-Proton Widths of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>O</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>12</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>, <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>N</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>16</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mi>e</mi></math></span>, and Three-Body Mechanism of Thomas-Ehrman Shift

L. V. Grigorenko; I. G. Mukha; I. J. Thompson; M. V. Zhukov

doi:10.1103/PhysRevLett.88.042502

Two-Proton Widths of ${}^{12}O$ , ${}^{16}N e$ , and Three-Body Mechanism of Thomas-Ehrman Shift

L. V. Grigorenko, I. G. Mukha, I. J. Thompson, and M. V. Zhukov

Phys. Rev. Lett. 88, 042502 – Published 11 January 2002

Abstract

Two-proton decays of ${}^{12}O$ and ${}^{16}N e$ ground states are studied in a three-body model. We have found that the two-proton widths for the states should be much less than the existing experimental values (about 10 times for ${}^{12}O$ and about 100 times for ${}^{16}N e$ ). We also have found that the structure of these states differs significantly from the mirror isobaric analog states (IAS): breaking of isobaric symmetry is at the level of tens of percents. Together with a corresponding decrease of the Coulomb energy, this effect can be considered as a three-body mechanism of the Thomas-Ehrman shift.

Received 3 May 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.042502

Authors & Affiliations

L. V. Grigorenko^1,2, I. G. Mukha^3,2, I. J. Thompson¹, and M. V. Zhukov⁴

¹Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
²Russian Research Center, “The Kurchatov Institute,” 123182 Moscow, Russia
³Gesellschaft für Schwerionenforschung mbH, Planckstrasse 1, D-64291 Darmstadt, Germany
⁴Department of Physics, Chalmers University of Technology, S-41296 Göteborg, Sweden