Three-body decay ofBe6

Abstract

Three-body correlations for the ground-state decay of the lightest two-proton emitter 6 Be are studied both theoretically and experimentally. Theoretical studies are performed in a three-body hyperspherical-harmonics cluster model. In the experimental studies, the ground state of 6 Be was formed following the α decay of a 10 C beam inelastically excited through interactions with Be and C targets. Excellent agreement between theory and experiment is obtained demonstrating the existence of complicated correlation patterns which can elucidate the structure of 6 Be and, possibly, of the A=6 isobar.

Thomas-Ehrman effect in a three-body model: TheNe16case

“…(4) and (5) vanishes in the limit widths tending to zero for continuum states. For 0 + and 2 + states of 16 Ne considered in this work (which are very narrow), the effect of particular choice of the sources Φ (J) q on the energies of the calculated resonances is less than some units of keV, which is much less than the other effects considered here.…”

“…The 12 O, 16 Ne, and their isobaric mirror partners 12 Be, 16 Recently 16 Ne was studied in three experiments using neutron knockout from a 17 Ne beam [7][8][9], and providing data with better statistics and quality than in the previous works. This inspired us to revisit the issue and consider the TES effect in 16 Ne/ 16 C also in the broader context including the first excited 2 + states. We demonstrate in this work that TES can be used as a very precise tool to check consistency of three-body core+N +N and two-body core+N state properties.…”

“…(i) The formulation provided by Eq. (5) is a simplistic, but reasonable approximation for the neutron knockout reaction mechanism used to populate 16 Ne states in the recent experimental studies [7][8][9]. Therefore, the differences in the approaches (4) and (5) is physically motivated.…”

“…can be used to gain more insight in the low-lying 16 Ne spectrum and in the properties of the even s-d shell nuclei beyond the proton dripline in general.…”

“…[14] for details of the whole procedure. For the 2 + excitations of 16 Ne we do not have some simple dynamically motivated model and Φ (2) q was provided by additionally acting on the valence protons of the 17 Ne g.s. WF by the quadrupole operator:…”