The ideal photon source for active interrogation of fissile materials would use monoenergetic photons to minimize radiation dose to surroundings. The photon energy would be high enough to produce relatively large photofission signals, but below the photoneutron threshold for common cargo materials in order to reduce background levels. To develop such a source, we are investigating the use of low-energy, proton-induced nuclear reactions to generate monochromatic, MeV-energy gamma-rays. Of particular interest are the nuclear resonances at 163keV for the 11B(p,γ)12C reaction producing 11.7MeV gamma-rays, 340keV for the 19F(p,αγ)16O reaction producing 6.13MeV photons, and 441keV for the 7Li(p,γ)8Be reaction producing 14.8 and 17.7MeV photons. A 700keV Van de Graaff ion accelerator was used to test several potential (p,γ) materials and the gamma-ray yields from these targets were measured with a 5″×5″ NaI detector. A pulsed proton beam from the accelerator was used to induce prompt (neutron) and delayed (neutron and gamma-ray) photofission signals in uranium which were measured with 3He and NaI detectors. We show that the accelerator data is in good agreement with Monte Carlo radiation transport calculations and published results.