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- W2277051579 abstract "The photon spectra from the reaction $^{16}mathrm{O}$(${ensuremath{pi}}^{ensuremath{-}}$,$ensuremath{gamma}$)$^{16}mathrm{N}$ and $^{18}mathrm{O}$(${ensuremath{pi}}^{ensuremath{-}}$,$ensuremath{gamma}$)$^{18}mathrm{N}$ were measured with a high-resolution pair spectrometer. Transitions to ${2}^{ensuremath{-}}$ states having $T=1$ in $^{16}mathrm{N}$ and $T=2$ in $^{18}mathrm{N}$ appear to dominate. Excitation of ${1}^{ensuremath{-}}$ states in the giant dipole resonance region, which are the analogs of the levels excited in photoabsorption and inelastic electron scattering on $^{16}mathrm{O}$ and $^{18}mathrm{O}$, respectively, were also observed. The total and partial branching ratios for bound states and giant-resonance transitions are compared with shell-model predictions. Higher admixtures to the predominantly 1p-1h wave functions are found to be necessary to obtain agreement with the measured branching ratios. A new treatment of the continuum and resonance excitation, based on calculations of Ohtsubo et al., is compared with the data.NUCLEAR REACTIONS Radiative pion capture; measured photon spectra for $^{16}mathrm{O}$(${ensuremath{pi}}^{ensuremath{-}}$,$ensuremath{gamma}$)$^{16}mathrm{N}$ and $^{18}mathrm{O}$(${ensuremath{pi}}^{ensuremath{-}}$,$ensuremath{gamma}$)$^{18}mathrm{N}$; deduced transitions and transition strength with ${J}^{ensuremath{pi}}={1}^{ensuremath{-}},{2}^{ensuremath{-}}$ and $T=1$ and $T=2$ respectively; comparison with shell-model calculations." @default.
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- W2277051579 date "1979-07-01" @default.
- W2277051579 modified "2023-09-25" @default.
- W2277051579 title "Excitation ofE1andM2resonances via (π−,γ) reactions onO16,18" @default.
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- W2277051579 doi "https://doi.org/10.1103/physrevc.20.248" @default.
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