| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1879082 | Applied Radiation and Isotopes | 2012 | 6 Pages |
The procedure followed by the Nuclear Metrology Laboratory, at IPEN, for the primary standardization of 99mTc is described. The primary standardization has been accomplished by the coincidence method. The beta channel efficiency was varied by electronic discrimination using a software coincidence counting system. Two windows were selected for the gamma channel: one at 140 keV gamma-ray and the other at 20 keV X-ray total absorption peaks. The experimental extrapolation curves were compared with Monte Carlo simulations by means of code ESQUEMA.
► The activity measurement of Tc-99m was carried out in a coincidence system. ► The activity was determined by the linear extrapolation technique. ► Software coincidence system based on a National Instruments PCI-6132 card. ► Monte Carlo technique was applied and results compared to experimental data.
