Beta Reference Standard Set
BS 280 consists of a set of FIVE uncalibrated Beta reference sources evaporated and sealed on 25mm dia x 5mm plastic disc covering FIVE photopeak energies with activity in the range of 0.1 to 0.4 micro curie. A reference chart for this is given below. These radioactive sources offered are from BRIT. This BS280 serves as an uncalibrated reference source set, for RC605A with Beta probe — wide end window GM. Detector and also for low background Beta counting system.The accuracy of these sources is in the range of /-10%. All these disc sources are enclosed in a neatly polished wooden box .
|Isotope||Energy MeV||Nominal Activity||Half Life|
|Co-60||0.315 (99.74%)||0.1-0.3 µci||5.27 Years|
|Sr90 Yt-90||0.546 (100%)||0.1-0.3 µci||28.5 Years|
|Tl-204||0.770 (98%)||0.1-0.3 µci||4 Years|
|Pm-147||0.2245 (100%)||0.1-0.3 µci||2.62 Years|