Phys.Rev. C 107, 034306 (2023)

N.Dronchi, D.Weisshaar, B.A.Brown, A.Gade, R.J.Charity, L.G.Sobotka, K.W.Brown, W.Reviol, D.Bazin, P.J.Farris, A.M.Hill, J.Li, B.Longfellow, D.Rhodes, S.N.Paneru, S.A.Gillespie, A.Anthony, E.Rubino, S.Biswas

Measurement of the B(E2 ↑) strengths of ³⁶Ca and ³⁸Ca

NUCLEAR REACTIONS ¹⁹⁷Au(³⁶Ca, ³⁶Ca), E=76.9 MeV/nucleon; ¹⁹⁷Au(³⁸Ca, ³⁸Ca), E=69.1 MeV/nucleon; ¹⁹⁷Au(³⁴Ar, ³⁴Ar), E not given; measured reaction products, Eγ, Iγ; deduced σ and B(E2) for the excitation of the first 2⁺ (³⁴Ar was present as contamination). ³⁶Ca; deduced proton decay branching ratio for 2 state proton unbound state, spectroscopic factors, charge radii difference with mirror nuclei ³⁶S. ³⁵K(p, γ), T=0.5-2 GK; deduced reaction rate using obtained in this paper values for the ³⁶Ca B(E2) and proton branching ratio. GRETINA HPGe array and the S800 spectrograph used to measure the γ-decay following Coulomb excitation. CAESAR CsI(Na) array and the S800 spectrograph used to measure the p/γ- branching ratio in ³⁶Ca. Systematics of first 2⁺ states energy and B(E2) for Ca isotopes. Beam produced from fragmentation reaction ⁹Be(⁴⁰Ca, X), E=140 MeV/nucleon at Coupled Cyclotron Facility (NSCL).

NUCLEAR STRUCTURE ^{36,38,40,42,44,46,48,50}Ca, ³⁶S, ³⁸Ar; calculated energy of first 2⁺ state, B(E2) for the excitation of first 2⁺ state. Shell model calculations with ZBM2, USDB, spdfu-mix and GXPF1A interactions. Comparison to experimental data.

doi: 10.1103/PhysRevC.107.034306