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- W2144607923 abstract "The reactions $^{40}mathrm{Ca}(ensuremath{alpha}, 2ensuremath{alpha})^{36}mathrm{Ar}$ and $^{40}mathrm{Ca}(ensuremath{alpha}, ensuremath{alpha}p)^{39}mathrm{K}$ have been studied at 115-MeV bombarding energy in order to obtain the charged particle decay characteristics of the giant quadrupole resonance at ${E}_{x}=18.0$ MeV. Energy and angle were measured for both outgoing light particles to completely define the kinematics. Weak proton decay to the ${d}_{frac{3}{2}}$ ($frac{{ensuremath{Gamma}}_{{p}_{0}}}{ensuremath{Gamma}}={0.08}_{ensuremath{-}0.03}^{+0.05}$) and ${s}_{frac{1}{2}}$ ($frac{{ensuremath{Gamma}}_{{p}_{1}}}{ensuremath{Gamma}}={0.22}_{ensuremath{-}0.08}^{+0.05}$) hole states of $^{39}mathrm{K}$ was observed from the giant quadrupole resonance while most of the decay proceeded to the region of the ${d}_{frac{5}{2}}$ hole states. While the ($ensuremath{alpha}, 2ensuremath{alpha}$) reaction populated the $^{36}mathrm{Ar}$ ground state (${mathrm{O}}^{+}$), 1.97-MeV state (${2}^{+}$), and 4.18-4.44-MeV states (${4}^{+}$, ${3}^{ensuremath{-}}$), only upper limits could be established for ensuremath{alpha} decay of the giant quadrupole resonance ($frac{{ensuremath{Gamma}}_{{a}_{0}}}{ensuremath{Gamma}}<0.06$). Significant decay of the 14-MeV $L=2$ state to the ground state of $^{36}mathrm{Ar}$ was observed ($frac{{ensuremath{Gamma}}_{{a}_{0}}}{ensuremath{Gamma}}ensuremath{sim}0.9ifmmodepmelsetextpmfi{}0.2$).NUCLEAR REACTIONS $^{40}mathrm{Ca}(ensuremath{alpha}, ensuremath{alpha}p)$, ($ensuremath{alpha}, 2ensuremath{alpha}$), ${E}_{ensuremath{alpha}}=115$ MeV; measured $frac{{d}^{4}ensuremath{sigma}}{d{ensuremath{Omega}}_{ensuremath{alpha}}d{ensuremath{Omega}}_{p}d{E}_{ensuremath{alpha}}d{E}_{p}}$,$frac{{d}^{4}ensuremath{sigma}}{d{ensuremath{Omega}}_{ensuremath{alpha}}d{E}_{ensuremath{alpha}}d{E}_{ensuremath{alpha}}}$, ($ensuremath{alpha}ensuremath{-}p$) angular correlation giant quadrupole resonance decay; deduced branching ratios, giant quadrupole resonance." @default.
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- W2144607923 date "1977-01-01" @default.
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- W2144607923 title "Particle decay from the giant resonance region ofCa40" @default.
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- W2144607923 doi "https://doi.org/10.1103/physrevc.15.246" @default.
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