Phys.Rev. C 98, 064308 (2018)

I.Mukha, L.V.Grigorenko, D.Kostyleva, L.Acosta, E.Casarejos, A.A.Ciemny, W.Dominik, J.A.Duenas, V.Dunin, J.M.Espino, A.Estrade, F.Farinon, A.Fomichev, H.Geissel, A.Gorshkov, Z.Janas, G.Kaminski, O.Kiselev, R.Knobel, S.Krupko, M.Kuich, Yu.A.Litvinov, G.Marquinez-Duran, I.Martel, C.Mazzocchi, C.Nociforo, A.K.Orduz, M.Pfutzner, S.Pietri, M.Pomorski, A.Prochazka, S.Rymzhanova, A.M.Sanchez-Benitez, C.Scheidenberger, P.Sharov, H.Simon, B.Sitar, R.Slepnev, M.Stanoiu, P.Strmen, I.Szarka, M.Takechi, Y.K.Tanaka, H.Weick, M.Winkler, J.S.Winfield, X.Xu, M.V.Zhukov

Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains

NUCLEAR REACTIONS ⁹Be(³¹Ar, X), E=620 MeV/nucleon, [secondary ³¹Ar beam from fragmentation of 885 MeV/nucleon ³⁶Ar primary beam]; measured proton and heavy-ion spectra, (heavy ion)p- and (heavy ion)pp-coin (proton)(heavy ion)(θ) using double-sided silicon micro-strip detectors for protons and optical time projection chamber for stopped heavy ions at SIS-FRS facility of GSI, a pilot version of the EXPERT (EXotic Particle Emission and Radioactivity by Tracking) setup planned by the Super-FRS Experiment Collaboration of the FAIR project at GSI. ^28,30Cl, ^29,31Ar; deduced proton-unbound states, S(2p) for ^29,31Ar, and S(p) for ²⁸Cl. ^28,30Cl; identified new isotopes, unbound to one-proton emission, deduced ground-state energies. Systematics of level energies, J, π in ^{28,29,30,31,32}Cl. Systematics of odd-even staggering energies in ^21,22,23Ne, ^{22,24,25,26,28,30}Mg, ^25,26Si, ^28,29S, ^{23,25,27,29,31}Al, ^{21,23,25,27,29}Na, which are isotones of ^29,30,31Ar. Comparison with theoretical calculations using core+p and core+p+p cluster models. See also companion paper 2018Gr12 for analyses based on systematics and theoretical calculations.

doi: 10.1103/PhysRevC.98.064308