In situ diffusion measurements in solids using short-lived radioactive tracers of 8Li and 20Na

Abstract We are developing in situ diffusion measurements in solids using short-lived radioactive ion beams provided from an isotope separator on-line (ISOL). We examined the feasibility of a new in situ nanoscale diffusion measurement method using a radioactive 8 Li tracer by computer simulations. Under moderate experimental conditions, we have found that the detection limit of lithium diffusion coefficient can be improved to a low value of 1 × 10 - 12 cm 2 / s . Also, in situ sodium diffusion measurement in Na battery materials can be applicable using a radioactive 20 Na tracer. We found Na diffusion coefficients can be measured, ranging from 10 - 6 to 10 - 10 cm 2 / s by computer simulations.