Disc & Laminate Sources

Disc sources are available in 1" and 2" diameter plastic disc with the 1" being standard and other sizes on special order.

The alpha source is of open window construction with the source material bonded to the surface of a silver foil mounted in the recess of the plastic disc. This design yields excellent emission of alpha particles without window losses.

Plastic laminates provide a convenient alternative packaging being easy to handle and store. The standard laminates have a transmission window of  0.005" and produce minimum attenuation for photons and higher energy beta particles.

Radioisotope sources are available individually or packaged as sets of three, five, and eight in convenient storage boxes. These items are uncalibrated and of nominal activity to provide a safe, yet inexpensive supply of radioactive material for educational and commercial use. When shipping or storing multiple gamma sources, to reduce reduce radiation levels we recommend using Lead Shields.

Standard individual sources for alpha, beta and gamma emissions are available in the following isotopes.

 

 

 

 


Isotope


Activity


Half-life


Emissions


Energies (keV)


10.7 years


Gamma


81.0, 276.3, 303.7, 355.9, 383.7


Ba133S1


1uCi.


C14S10


10uCi.


5730 years


Beta


β156.5


Cd109S1


1uCi


453 days


Gamma


88.0


Co57S1


1uCi.


270 days


Gamma


122.1, 136.4


Co60S1


1uCi.


5.27 years


Gamma, Beta


1173.2, 1332.5, β317.9


Cs137S.2


0.2uCi.


30.1 years


Gamma, Beta


32, 661.6, β511.6, β1173.2


Gamma, Beta


32, 661.6, β511.6, β1173.2


Cs137S.5


0.5uCi.


30.1 years


Gamma, Beta


32, 661.6, β511.6, β1173.2


Cs137S1


1uCi.


30.1 years


Gamma, Beta


32, 661.6, β511.6, β1173.2


Cs137S5


5uCi.


30.1 years


"Unknown"


32, 661.6, 1115.5


Cs/ZnS


1uCi.


Mixed


Eu152S1


1uCi.


13.5 Years


Gamma, Beta


Multiple energies


Fe55S100


100uCi.


2.73 years


X-ray, Beta


5.9, 6.5, β231.4


Gamma, Beta


834.8, β542.2


Mn54S1


1uCi.


312 days


Gamma


1274.5, 511


Na22S1


1uCi.


2.6 years


Alpha


5407.5


Po210S


0.1uCi.


138 days


Beta


β546


Sr90S


0.1uCi.


28.8 years


Beta


β763.7


Tl204S1


1uCi.


3.78 years


Gamma, Beta


1115.6, β236.34 β1351.9


Zn65S1


1uCi.


244 days


Other activities are available on special order to the maximum NRC Exempt Quantities.

Gamma sources may be order as Calibrated against the NIST Mixed Gamma Standard, SRM 4275C-125.