title: Comparison of the NMIJ and the ARPANSA standards for absorbed dose to water in high-energy photon beams.
abstract: The authors report the results of an indirect comparison of the standards of absorbed dose to water in high-energy photon beams from a clinical linac and (60)Co radiation beam performed between the National Metrology Institute of Japan (NMIJ) and the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA). Three ionisation chambers were calibrated by the NMIJ in April and June 2013 and by the ARPANSA in May 2013. The average ratios of the calibration coefficients for the three ionisation chambers obtained by the NMIJ to those obtained by the ARPANSA were 0.9994, 1.0040 and 1.0045 for 6-, 10- and 15-MV (18 MV at the ARPANSA) high-energy photon beams, respectively. The relative standard uncertainty of the value was 7.2 × 10(-3). The ratio for (60)Co radiation was 0.9986(66), which is consistent with the results published in the key comparison of BIPM.RI(I)-K4.
authors.affiliation: National Metrology Institute of Japan, AIST, Tsukuba, Japan morihito-shimizu@aist.go.jp.
authors.forename: M
authors.initials: M
authors.lastname: Shimizu
authors.affiliation: National Metrology Institute of Japan, AIST, Tsukuba, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Morishita
authors.affiliation: National Metrology Institute of Japan, AIST, Tsukuba, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kato
authors.affiliation: National Metrology Institute of Japan, AIST, Tsukuba, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Tanaka
authors.affiliation: National Metrology Institute of Japan, AIST, Tsukuba, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kurosawa
authors.affiliation: National Metrology Institute of Japan, AIST, Tsukuba, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Takata
authors.affiliation: National Metrology Institute of Japan, AIST, Tsukuba, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Saito
authors.affiliation: Australian Radiation Protection and Nuclear Safety Agency, Yallambie, Australia.
authors.forename: G
authors.initials: G
authors.lastname: Ramanathan
authors.affiliation: Australian Radiation Protection and Nuclear Safety Agency, Yallambie, Australia.
authors.forename: P D
authors.initials: PD
authors.lastname: Harty
authors.affiliation: Australian Radiation Protection and Nuclear Safety Agency, Yallambie, Australia.
authors.forename: C
authors.initials: C
authors.lastname: Oliver
authors.affiliation: Australian Radiation Protection and Nuclear Safety Agency, Yallambie, Australia School of Chemistry and Physics, University of Adelaide, Adelaide, Australia.
authors.forename: T
authors.initials: T
authors.lastname: Wright
authors.affiliation: Australian Radiation Protection and Nuclear Safety Agency, Yallambie, Australia.
authors.forename: D J
authors.initials: DJ
authors.lastname: Butler
mesh_terms: D000047:Academies and Institutes; D001315:Australia; D002138:Calibration / Q000592:standards*; D003037:Cobalt Radioisotopes / Q000032:analysis / Q000592:standards; D006801:Humans; D007564:Japan; D010315:Particle Accelerators / Q000295:instrumentation / Q000592:standards*; D017785:Photons; D011874:Radiometry / Q000295:instrumentation / Q000592:standards*; D011882:Radiotherapy, High-Energy / Q000295:instrumentation / Q000592:standards*; D012015:Reference Standards; D015203:Reproducibility of Results; D014867:Water / Q000737:chemistry*
chemical_list: D003037:Cobalt Radioisotopes; D014867:Water