The alpha effectiveness of the dating ESR signal in barite

Shin Toyoda, Fumihiro Sato, Hirotsugu Nishido, Masahiro Kayama, Jun Ichiro Ishibashi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The alpha effectiveness was investigated for an ESR signal due to SO 3 - in barite by comparing the dose responses of the signal for gamma irradiation and for He ion implantation with an energy of 4 MeV. The value was obtained to be 0.043 ± 0.018 for samples from Morocco and to be 0.0089 ± 0.0006 for Kanehira Mine. The dose response for He ion implantation for the latter sample better fits to a correlation line but the signal shape changes with gamma ray dose, indicating contribution from an unknown radiation sensitive signal, while the former sample shows the same signal shapes. A value of 0.043 ± 0.018 is adopted as the alpha effectiveness of SO 3 - signal in barite, which is used for ESR dating of submarine hydrothermal activity.

Original languageEnglish
Pages (from-to)900-902
Number of pages3
JournalRadiation Measurements
Issue number9
Publication statusPublished - Sept 2012

All Science Journal Classification (ASJC) codes

  • Radiation
  • Instrumentation


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