Beta sources BF-type
Beta Particle Standards—Type MF2
This is a “scatterless” configuration in which the activity is applied as a 0.12” (3 mm) spot centered between two laminated 0.9 mg/cm2 aluminized Mylar foils. The source is supplied in a removable aluminum holder. In the holder the source has an overall diameter of 1” (25.4 mm) and a thickness of 0.125” (3.18 mm). Out of the holder the source is 0.937” (23.8 mm) in diameter with a thickness of approximately 0.030” (0.76 mm).
This configuration is most useful for the precise determination of G.M. and proportional counter efficiencies, and as an educational tool for the verification of the inverse square law, as well as demonstrating back-scatter phenomena.
Overall diameter | Active Diameter | Height |
| 1”
| 0.12” | 0.125” |
| 25.4 mm
| 3 mm | 3.18 mm |
Nature of Active Deposit | Available Activities |
| Evaporated Salts on Mylar
| 5 nCi -100 nCi (185 Bq -3.7 kBq) |
Exceptions |
Bi-210 : 10 nCi -100 nCi (370 Bq -3.7 kBq) |
Nuclide | Product code | Activity range | Remark |
C-14 | BF-014-MF2 | 370 Bq - 37 kBq |
|
Cs-137 | BF-137-MF2 | 370 Bq - 37 kBq |
|
Cl-36 | BF-036-MF2 | 370 Bq - 37 kBq |
|
Co-60 | BF-060-MF2 | 370 Bq - 37 kBq | |
Ge-681) | 370 Bq - 37 kBq | ||
Na-22 | BF-022-MF2 | 370 Bq - 37 kBq | |
Pm-147 | BF-147-MF2 | 370 Bq - 37 kBq | |
Ru-106/Rh-106 | BF-106-MF2 | 370 Bq - 37 kBq | |
Sr-90/Y-902) | BF-090-MF2 | 370 Bq - 18,5 kBq | maximum activity |
Tc-99 | BF-099-MF2 | 370 Bq - 37 kBq | |
Tl-204 | BF-204-MF2 | 370 Bq - 37 kBq |
