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- W2014630571 abstract "A multilevel two-channel $R$-matrix analysis is made for both the neutron total and angle-integrated ($n,ensuremath{alpha}$) cross sections of $^{16}mathrm{O}$ for 0-5.8-MeV neutrons. Off-resonant phase shifts are described by scattering in a real Woods-Saxon local potential with a spin-orbit term and a parity dependence for the well depths. The well parameters are chosen to bind the $1{d}_{frac{5}{2}}$ and $2{s}_{frac{1}{2}}$ levels at the energies of the lowest two states in $^{17}mathrm{O}$ and the quasibound $1{d}_{frac{3}{2}}$ level at the centroid of five observed ${frac{3}{2}}^{+}$ resonances. The $1{d}_{frac{3}{2}}$ level is replaced by these five fragments which contain nearly 100% of the $1{d}_{frac{3}{2}}$ strength and have their eigenenergy centroid at 5.74 MeV in $^{17}mathrm{O}$. The 5.08-MeV level in $^{17}mathrm{O}$ has 69% of the strength. The $R$-matrix boundary radius must be chosen carefully inside the tail of the potential in order to subtract the $1{d}_{frac{3}{2}}$ state and in order to place the unbound $2p$ and $1f$ states at energies consistent with the observed $p$-and $f$-wave fragments. Spectroscopic factors are deduced for 26 levels in $^{17}mathrm{O}$ between 4.5 and 9.5 MeV and the sums of these factors are 1% for ${J}^{ensuremath{pi}}={frac{1}{2}}^{+}$; 5% for ${frac{1}{2}}^{ensuremath{-}}$; 12% for ${frac{3}{2}}^{ensuremath{-}}$; 99% for ${frac{3}{2}}^{+}$; 0.1% for ${frac{5}{2}}^{+}$; 1% for ${frac{5}{2}}^{ensuremath{-}}$; and 14% for ${frac{7}{2}}^{ensuremath{-}}$. Thus, the observed single-particle structure of $^{17}mathrm{O}$ in both the bound and unbound region is described by an $R$-matrix-plus-potential analysis." @default.
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- W2014630571 title "Unified<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>R</mml:mi></mml:math>-Matrix-Plus-Potential Analysis for<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant=normal>O</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>16</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow><mml:mo>+</mml:mo><mml:mi>n</mml:mi></mml:math>Cross Sections" @default.
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- W2014630571 doi "https://doi.org/10.1103/physrevc.7.561" @default.
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