Phys.Rev. C 96, 054305 (2017)

M.Vandebrouck, for the R3B collaboration

Effective proton-neutron interaction near the drip line from unbound states in ^{25, 26}F

NUCLEAR REACTIONS C(²⁶Ne, ²⁵F), E=456 MeV/nucleon; C(²⁷Ne, ²⁶F), E=432 MeV/nucleon, [secondary ^26,27Ne beams from ⁹Be(⁴⁰Ar, X), E=490 MeV/nucleon followed by separation of fragments using fragment separator (FRS) at GSI accelerator facility and identification of fragments by energy loss and time-of-flight]; measured particle spectra, Eγ, E(n), Iγ, nγ-coin using the R3B/LAND setup with 4π Crystal Ball of 159 NaI crystals and large area neutron detector (LAND). ^25,26F; deduced levels, resonances, J, π, width. Comparison with shell-model calculations using the phenomenological USDA and WBP interactions and with ab initio valence-space Hamiltonians derived from in-medium similarity renormalization group (IM-SRG).

doi: 10.1103/PhysRevC.96.054305