Research and Development
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œ Air kerma standards for low-level γ-rays

Calibration of dosemeters in low-level radiation is realized. The rage of the dose rate is from 0.065 mGy¥h-1 to 2.0 mGy¥h-1.

œ Air kerma standards for mammography X-rays

The X-ray qualities of Mo/Mo, Mo/Rh, Rh/Rh, W/Al, W/Ag, and W/Rh are provided.

œ Pulse energy measurements of X-ray free electron lazer

Using a calorimeter operated in room temperature, pulse energies of X-ray free electron lazer at SPring-8 (SACLA) have been evaluated.

œ Development of absorbed dose to water standards for a clinical linac

The absorbed dose to water standards for high energy photons was established in 2013. The standards for high energy electrons are also developing.

œ Development of β-ray dose standards

The standards of absorbed dose to tissue for Sr-90/Y-90, Kr-85, and Pm-147 were developed using an extrapolation ionization chamber. The standards of absorbed dose to water for Ru-106 bracheytherapy source was also developed.

œ Development of absorbed dose to water for Co-60 γ-rays

Absorbed dose to water in Co-60 γ-ray beams are evaluated using a graphite calorimeter.

œ Development of absorbed dose to water for medical ion beams