  Hadrons containing at least one heavy quark (charm or bottom) frequently have
small enough natural widths that decay modes involving a single photon have
detectable branching fractions. Photons of typical energy greater than 100 MeV
have been directly detected, while those of lower energy have only been
inferred. Here we discuss prospects for observing direct sub-100 MeV photons in
specific radiative decays of charmed and bottom vector mesons, as well as a
spin-excited heavy baryon.
