The two-neutron unbound ground state resonances of 26O and 16Be were populated using one-proton knockout reactions from 27F and 17B beams. A coincidence measurement of 3-body system (fragment + n + n) allowed for the decay energy of the unbound nuclei to be reconstructed. A low energy resonance, < 200 keV, was observed for the first time in the 240 + n + n system and assigned to the ground state of 26O. The 16Be ground state resonance was observed at 1.35 MeV. The 3-body correlations of the 14Be + n + n system were compared to simulations of a phase-space, sequential, and dineutron decay. The strong correlations in the n-n system from the experimental data could only be reproduced by the dineutron decay simulation providing the first evidence for a dineutron-like decay.
|Original language||English (US)|
|Journal||Journal of Physics: Conference Series|
|State||Published - 2013|
|Event||11th International Conference on Nucleus-Nucleus Collisions, NN 2012 - San Antonio, TX, United States|
Duration: May 27 2012 → Jun 1 2012
ASJC Scopus subject areas
- Physics and Astronomy(all)