Neutron Decay from the Ca 49 Ground-State Analog in Sc</mml:mi…
1972; American Institute of Physics; Volume: 6; Issue: 5 Linguagem: Inglês
10.1103/physrevc.6.1730
ISSN1538-4497
AutoresA. J. Elwyn, Franca T. Kuchnir, J. E. Monahan, F. P. Mooring, J.F. Lemming, W. G. Stoppenhagen,
Tópico(s)Astronomical and nuclear sciences
ResumoRelative angular distributions of neutrons from the $^{48}\mathrm{Ca}(p,n)^{48}\mathrm{Sc}$ reaction to four positiveparity states in $^{48}\mathrm{Sc}$ have been measured at 11 proton energies between 1.955 and 1.995 MeV. This energy interval encompasses a number of the components of the ${\frac{3}{2}}^{\ensuremath{-}}$ isobaric analog of the $^{49}\mathrm{Ca}$ ground state in $^{49}\mathrm{Sc}$. The neutron decay of $^{49}\mathrm{Sc}$ in the region of the two largest components is discussed in terms of a model of the ($p,n$) reaction in which the isospin-violating forces are assumed to manifest themselves through boundary-condition mixing only. The gross features of most of the data throughout this energy interval can be described in terms of two $T<{\frac{3}{2}}^{\ensuremath{-}}$ states and a number of ${\frac{3}{2}}^{+}$ and ${\frac{5}{2}}^{+}$ levels. The branching ratio for neutron decay to the various levels in $^{48}\mathrm{Sc}$ suggests that the two major ${\frac{3}{2}}^{\ensuremath{-}}$ components have fairly simple but somewhat different shell-model configurations.
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