Abstract
We have studied, by a computer simulation, the feasibility of the radiotracer method for diffusion studies using short-lived radioactive nuclear beams as tracers. We have considered two typical examples of radiotracers that will be available in KEK-JAERI RNB facility, 18F (half-life: 1.8 h, β+-emitter) and 8Li (half-life: 0.83 s, α-emitter). The sample is set on a given temperature and irradiated by the tracer beams for a time-duration. In the case of 18F, the serial sectioning technique by the ion-beam-sputtering device is assumed to obtain the concentration-depth profile of the tracer diffused during the irradiation time. In the case of 8Li, the simulation reveals that the time-dependent yields of α particles can be used as a measure of the diffusivity of the tracer in a non-destructive way. The present method could be applied to measure rather large diffusion coefficients of various radiotracers with a short measuring time.
Original language | English |
---|---|
Pages (from-to) | 483-488 |
Number of pages | 6 |
Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
Volume | 212 |
Issue number | 1-4 |
DOIs | |
Publication status | Published - 2003 Dec |
Externally published | Yes |
Event | Atomic Collisions in Solids - India, India Duration: 2003 Jan 19 → 2003 Jan 24 |
Keywords
- Charged particle (α)-emitter
- Concentration-depth profile
- Diffusion coefficient
- Radiotracer method
- Short-lived radioactive nuclear beams
- β-emitter
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation