Phys.Rev. C 92, 024312 (2015)

S.Noji, R.G.T.Zegers, SamM.Austin, T.Baugher, D.Bazin, B.A.Brown, C.M.Campbell, A.L.Cole, H.J.Doster, A.Gade, C.J.Guess, S.Gupta, G.W.Hitt, C.Langer, S.Lipschutz, E.Lunderberg, R.Meharchand, Z.Meisel, G.Perdikakis, J.Pereira, F.Recchia, H.Schatz, M.Scott, S.R.Stroberg, C.Sullivan, L.Valdez, C.Walz, D.Weisshaar, S.J.Williams, K.Wimmer

Gamow-Teller transitions to ⁴⁵Ca via the ⁴⁵Sc (t, ³He+γ) reaction at 115 MeV/u and its application to stellar electron-capture rates

NUCLEAR REACTIONS ⁴⁵Sc(t, ³He), E=115 MeV/nucleon, [triton beam from ⁹Be(¹⁶O, X), E=150 MeV/nucleon reaction]; measured ³He spectra, double-differential σ(θ), Eγ, Iγ, (particle)γ-coin using S800 spectrometer, cathode-readout drift chambers (CRDCs) and Gretina array at NSCL-MSU Coupled-Cyclotron facility. ⁴⁵Ca; deduced levels, J, π, B(GT) strength functions, electron capture rates on ⁴⁵Ca as function of stellar temperatures T₉=8.5-10.5, poor agreement with shell-model calculations in the pf space and using GXPF1A, KB3G, and FPD6 interactions. Comparison of B(GT) with that from ⁴⁵Ca g.s. to ⁴⁵Sc g.s. β transition.

doi: 10.1103/PhysRevC.92.024312