The absolute standardization of 32 P radioactive sources employed to calibrate nuclear medicine instruments has been conducted at PTKMR-BATAN. We deemed this activity to be necessary since 32 P used in the nuclear medicine fields has a short half-life, and in order to obtain a result of quality measurement, it requires a special treatment. Moreover, in Indonesia, the use of nuclear medicine techniques has developed rapidly. We prepared all the radioactive sources with a gravimetric method by using a KERN ABT 220-5DM semi-micro type scale, traceable to the International Unit System. We conducted the 32 P standardization by employing a (PS)-coincidence method with 60 Co as a tracer; meanwhile, we conducted the impurity measurement by employing a beta spectrometer system. The result of 32 P absolute measurement was 380.05 Bq/mg with a 0.68-percent range uncertainty, with a k=2 coverage factor. This value was used to calibrate a "Capintec CRC-7BT" dose calibrator that was a secondary standard instrument in PTKMR-BATAN. The results showed us that the calibration factor of the "Capintec CRC-7BT" dose calibrator was 1.12 with a 4.7-percent uncertainty.Journal homepage: http://aij.batan.go.id

The international comparison of activity measurements of 59Fe, APMP.RI(II)-K2.Fe-59, was carried out within the framework of the Asia-Pacific Metrology Programme (APMP). Nine institutes took part in the comparison, and eight institutes of them undertook absolute measurements. One ampoule prepared using the same radioactive solution as that used in the comparison was sent to the BIPM/SIR in order to link the comparison to the BIPM key comparison reference value (KCRV). Main text To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCRI, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).