ESIR – Extension of SIR
A pilot study has been carried out to test the system in condition of a key comparison of standard solution of 60Co. Compared to the reference SIR, the study shown the capability of ESIR to provide accurate and precise degrees of equivalence – a least when the solution is known not containing additional impurities. The CCRI(II) validates the fact that the service can open in 2024 and a protocol is under definition (link to the protocol).
| Radionuclides covered | 14C, 35S, 45Ca, 55Fe, 63Ni, 89Sr, 90Sr, 99Tc, 147Pm, 241Am, 241Pu |
| BIPM comparator | Planned to be opened in 2024 |
| Level | Radionuclide dependent |
| Quantity | Bq/g |
| Uncertainty | Aiming for 0.5 % (k = 2) |
| Comparison service identifier | BIPM.RI(II)-K5 |
| Underpins equivalence for... | Radionuclides set out in the MMM |
| Validity | Results remain valid for 15 years |
| Key comparison reference value | Power-moderated weighted mean of results |
Guidance document
Guidance on applying the Measurement Methods Matrix (MMM) in using comparison results to support CMCs
CCRI Guidance Document on the CIPM MRA
60Co Pilot Study
The international reference system for activity measurements of g-ray emitting nuclides
Coulon R. and Al., The international reference system for beta-particle emitting radionuclides: Validation through the pilot study CCRI(II)-P1.Co-60, Appl. Rad. Isot., 200, 2023
Contact
BIPM Ionizing Radiation Department - Radionuclide Metrology