Abstract
The microscopic structure of the spin-dipole resonance (SDR) at ${E}_{x}=21.1 \mathrm{MeV}$ in ${}^{208}\mathrm{Bi}$ has been investigated in the ${}^{208}\mathrm{Pb}{(}^{3}\mathrm{He}{,t)}^{208}\mathrm{Bi}$ reaction at ${E(}^{3}\mathrm{He})=450 \mathrm{MeV}$ and very forward scattering angles. Protons emitted due to the decay of the SDR were measured in solid-state detectors in coincidence with tritons detected with the high resolution magnetic spectrometer Grand Raiden. The total and partial branching ratios for proton decay from the SDR to the residual neutron-hole states in ${}^{207}\mathrm{Pb}$ have been measured. The deduced escape widths are found to be in good agreement with recent theoretical estimates.
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