Physics · Dual Nature of Matter and Radiation

In the Davisson-Germer experiment, electrons accelerated by 54 eV at normal incidence on a crystal showed a peak at a specific scattering angle. For a neutron to show a peak at the exact same angle for the same first-order reflection on the same crystal, its kinetic energy would need to be approximately: (Given: mn ≈ 1.67 × 10-27 kg, me ≈ 9.11 × 10-31 kg)