Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The radioisotopes point source parameters.
| PTB Nuclide | Energy keV |
Emission Probability | Activity kBq | Reference Date | Uncertainty |
|---|---|---|---|---|---|
| Am-241 | 59.52 | 35.90 | 259.0 | 1.June 2009 | ±2.6 |
| Cs-137 | 661.66 | 34.10 | 385.0 | ±4.0 | |
| Eu-152 | 121.78 | 28.40 | 290.0 | ±4.0 | |
| 244.69 | 26.60 | ||||
| 344.28 | 14.00 | ||||
| 964.13 | 20.87 | ||||
| 1408.10 | 85.21 | ||||
| Co-60 | 1173.23 | 99.90 | 212.1 | ±1.5 | |
| 1332.50 | 99.98 |
