Nuclear "Time-Delay" and X-Ray-Proton Coincidences near a Nuclear Scattering Resonance

Abstract

The probability for production of $K$-shell x rays by protons elastically scattered from $^{58}\mathrm{Ni}$ is observed to change as one varies the proton energy over the ${s}_{\frac{1}{2}}$ nuclear resonance at ${E}_{p}=3.151$ MeV. The results are interpreted theoretically in terms of interfering products of atomic ionization and energy-dependent nuclear scattering amplitudes.