In-beam Mössbauer spectroscopy of 57Fe/57Mn in MgO and NaF at Heavy-Ion Medical Accelerator in Chibaa)

Development of efficient ion supply of 58Fe from 58Fe(C5H5)2, and quick switching between therapy and material science at the Heavy-Ion Medical Accelerator in Chiba realized a new 57Mn in-beam emission Mossbauer spectroscopy measurement system. Application to simple binary chemical compounds, MgO and NaF, proved the usefulness of the system to probe chemical and physical behaviors of trace impurities in solids. Annealing of lattice defects produced by the implantation and β-decay of 57Mn and/or γ-ray emission recoil was observed by a local probe.