The observation of long-range three-body Coloumb effects in the decay of 16Ne

Abstract

The interaction of an $E/A$=57.6-MeV ${}^{17}$Ne beam with a Be target was used to populate levels in ${}^{16}$Ne following neutron knockout reactions. The decay of ${}^{16}$Ne states into the three-body ${}^{14}$O+$p$+$p$ continuum was observed in the High Resolution Array (HiRA). For the first time for a 2p emitter, correlations between the momenta of the three decay products were measured with sufficient resolution and statistics to allow for an unambiguous demonstration of their dependence on the long-range nature of the Coulomb interaction. Contrary to previous experiments, the intrinsic decay width of the ${}^{16}$Ne ground state was found to be narrow ($\Gamma <60$~keV), consistent with theoretical estimates.

arXiv comment6 pages, 5 figures

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• Thomas-Ehrman effect in a three-body model: ${}^{16}$Ne case
• Particle decays of levels in ${}^{11,12}$N and ${}^{12}$O investigated with the invariant-mass method
• Proton decays in ${}^{16}$Ne and ${}^{18}$Mg and isospin-symmetry breaking in carbon isotopes and isotones
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• Invariant-mass spectroscopy of ${}^{14}$O excited states
• Ab initio descriptions of $A=16$ mirror nuclei with resonance and continuum coupling
• Strong neutron pairing in core+4n nuclei
• Transition from direct to sequential two-proton decay in $s$-$d$ shell nuclei
• On Determining Dead Layer and Detector Thicknesses for a Position-Sensitive Silicon Detector
• High precision studies of soft dipole mode in two-neutron halo nuclei: ${}^6$He case
• Mass-15 nuclei and predicting narrow states beyond the proton drip line
• Three-body correlations in direct reactions: Example of ${}^6$Be populated in $(p,n)$ reaction
• Pauli-principle driven correlations in four-neutron nuclear decays
• Gamow shell model predictions for six-proton unbound nucleus ${}^{20}$Si
• Gamow shell model calculations for the Thomas-Ehrman shift in new isotopes 21Al
• Three-body vs. dineutron approach to two-neutron radiative capture in ${}^6$He
• Direct observation of three-neutron emission from ${}^7$He${}^{\ast }$ and the search for the trineutron