Measurement of high energy resolution inelastic proton scattering at and close to zero degrees

Measurements of inelastic proton scattering with high energy resolution at forward scattering angles including 0∘0∘ are described. High-resolution halo-free beams were accelerated by the cyclotron complex at the Research Center for Nuclear Physics. Instrumental background events were minimized using the high-quality beam. The remaining instrumental background events were eliminated by applying a background subtraction method. As a result, clean spectra were obtained even for a heavy target nucleus such as Pb208. A high energy resolution of 20 keV (FWHM) and a scattering angle resolution of ±0.6∘±0.6∘ were achieved at an incident proton energy of 295 MeV.