%0 Journal Article
%T Broken mirror symmetry in S-36 and Ca-36
%A Valiente-Dobon, J. J.
%A Poves, A.
%A Gadea, A.
%A Fernandez-Dominguez, B.
%J Physical Review C
%D 2018
%V 98
%N 1
%I Amer Physical Soc
%@ 2469-9985
%G English
%F Valiente-Dobon_etal2018
%O WOS:000439059400001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3661), last updated on Tue, 31 Jul 2018 11:58:30 +0000
%X Shape coexistence is a ubiquitous phenomenon in the neutron-rich nuclei belonging to (or sitting at the shores of) the N = 20 island of inversion (IoI). Exact isospin symmetry predicts the same behavior for their mirrors and the existence of a proton-rich IoI around Z = 20, centered in the (surely unbound) nucleus Ca-32. In this article we show that in Ca-36 and S-36, Coulomb effects break dramatically the mirror symmetry in the excitation energies due to the different structures of the intruder and normal states. The mirror energy difference (MED) of their 2(+) states is known to be very large at – 246 keV. We reproduce this value and predict the first excited state in Ca-36 to be a 0(+) at 2.7 MeV, 250 keV below the first 2(+). In its mirror S-36 the 0(+) lies at 55keV above the 2(+) measured at 3.291 MeV. Our calculations predict a huge MED of -720 keV, that we dub the "colossal" mirror energy difference. A possible reaction mechanism to access the O-2(+) in Ca-36 will be discussed. In addition, we theoretically address the MEDs of the A = 34, T = 3 and A = 32, T = 4 mirrors.
%R 10.1103/PhysRevC.98.011302
%U https://doi.org/10.1103/PhysRevC.98.011302
%P 011302-5pp