On discontinuity of hyperfine fields at 57Fe nuclei in bulk iron and aerosol Fe nanoparticles

Discontinuity of hyperfine fields at 57Fe nuclei in bulk iron and in aerosol Fe nanoparticles of 50 and 13±2 nm has been revealed by analysing their Mössbauer spectra taken at room and low temperatures. The observed discontinuity in hyperfine distribution of all examined specimens is supposed to be caused with a quantization of the angular momentum of 4s-like components near a Fe nucleus in the molecular field of the lattice.