Simulation study on the measurements of diffusion coefficients in solid materials by short-lived radiotracer beams

Sun Chan Jeong, Ichiro Katayama, Hirokane Kawakami, Hironobu Ishiyama, Hiroari Miyatake, Masao Sataka, Akihiro Iwase, Satosi Okayasu, Hiroyuki Sugai, Shinichi Ichikawa, Katsuhisa Nishio, Yasuharu Sugiyama, Masahito Yahagi, Kazunori Takada, Mamoru Watanabe

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


We have examined, by a computer simulation, an on-line measurement of diffusion coefficients by using a short-lived alpha particle emitter, 8Li (half life of 0.84s), as a radiotracer. The energy spectra of alpha particles emitted from diffusing 8Li primarily implanted in the sample of LiAl are simulated as a measure of the diffusion of 8Li in the sample. As a possible time sequence for the measurement, a time cycle of 6 s, i.e. the implantation of 8Li for 1.5 s and subsequent diffusion for 4.5 s, is supposed. The sample is primarily set on a given temperature for the measurement. The time-dependent yields of alpha particles during the time cycle reveal the possibility to measure the diffusion coefficient with an accuracy of 10% if larger than 1 × 10-9 cm2/s, by the comparison with the experimental spectra measured at the temperature, i.e. at a certain diffusion coefficient.

Original languageEnglish
Pages (from-to)4576-4583
Number of pages8
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number7 A
Publication statusPublished - 2003 Jul
Externally publishedYes


  • Concentration-depth profile
  • Diffusion coefficient
  • Implantation in LiAl
  • Li
  • On-line measurement
  • Short-lived radiotracer beams
  • Time-dependent yield spectra

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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