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Thomas-Ehrman effect in a three-body model: The Ne-16 case

L. V. Grigorenko ; T. A. Golubkova ; Mikhail V. Zhukov (Institutionen för fundamental fysik)
Physical Review C. Nuclear Physics (0556-2813). Vol. 91 (2015), 2, p. article no. 024325 .
[Artikel, refereegranskad vetenskaplig]

The dynamic mechanism of the Thomas-Ehrman shift in three-cluster systems is studied by using the example of Ne-16 and C-16 isobaric mirror partners. We predict configuration mixings for 0(+) and 2(+) states in Ne-16 and C-16. Large isospin symmetry breaking on the level of wave function component weights is demonstrated for these states and discussed as a three-body mechanism of the Thomas-Ehrman shift. It is shown that the description of the Coulomb displacement energies requires consistency among three parameters: the Ne-16 decay energy ET, the F-15 ground-state energy E-r, and the configuration mixing parameters for the Ne-16 and (16)C0(+) and 2(+) states. Based on this analysis we infer the (15)F1/2(+) ground-state energy to be E-r = 1.39-1.42 MeV.

Denna post skapades 2015-04-13. Senast ändrad 2015-06-22.
CPL Pubid: 215160


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Institutionen för fundamental fysik (2005-2015)



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