Phys.Rev. C 87, 064316 (2013)

Yu.Aksyutina, T.Aumann, K.Boretzky, M.J.G.Borge, C.Caesar, A.Chatillon, L.V.Chulkov, D.Cortina-Gil, U.Datta Pramanik, H.Emling, H.O.U.Fynbo, H.Geissel, G.Ickert, H.T.Johansson, B.Jonson, R.Kulessa, C.Langer, T.LeBleis, K.Mahata, G.Munzenberg, T.Nilsson, G.Nyman, R.Palit, S.Paschalis, W.Prokopowicz, R.Reifarth, D.Rossi, A.Richter, K.Riisager, G.Schrieder, H.Simon, K.Summerer, O.Tengblad, H.Weick, M.V.Zhukov

Structure of the unbound nucleus ¹³Be: One-neutron knockout reaction data from ¹⁴Be analyzed in a holistic approach

NUCLEAR REACTIONS ¹H(¹⁴Be, n), [¹⁴Be secondary beam from Be(¹⁶O, X), E=360 MeV/nucleon primary reaction], E=304 MeV/nucleon; measured particle and neutron spectra, (fragment)n-coin in one-neutron knockout reaction, energy loss, time-of-flight, transverse momentum distributions using ALADIN-LAND system at GSI facility; deduced invariant mass in ¹²Be+n system, relative intensities of s-, p- and d-components, momentum-profile distribution. ¹³Be; deduced levels, resonances, J, π, widths, energies of S-matrix poles. ¹²Be; deduced levels, J, π from neutron decay of resonance in ¹³Be. ¹⁴C(⁷Li, ⁸B), E=82 MeV; ¹⁴C(π^-, p), E=stopped pions; ¹⁴C(¹¹B, ¹²N), E=190 MeV; ¹³C(¹⁴C, ¹⁴O), E=337 MeV; ²H(¹²Be, p), E=72 MeV/nucleon; reviewed resonance energies, J, π, width data for ¹³Be in missing mass methods. C(¹⁴B, n¹²Be), E=35, 287 MeV/nucleon; ¹H(¹⁴Be, n¹²Be), E=68 MeV/nucleon; reviewed and analyzed resonance energies, J, π, width data for ¹³Be in invariant mass methods. ¹H(¹⁴Be, n), E=68, 304 MeV/nucleon; analyzed relative energy spectra in ¹²Be+n system, σ, resonance energies and widths from RIKEN and current (GSI) data. Impulse approximation formalism. Dominance of s-wave component in ¹²Be+n system.

doi: 10.1103/PhysRevC.87.064316