Radioactive Disc / Check Sources

Single Sources and Kits Available

Several Isotopes to choose from.

These sources are supplied as one inch plastic discs. With the exception of the alpha source, the small quantity of radioactive material is sealed in the plastic with epoxy to prevent leakage and contamination. The transmission window is sufficiently thin to transmit both beta and gamma emissions without undue absorption.

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 with window losses.

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

Standard Disc Sources are +/- 25% nominal. Secondary calibration (^+/- 5%)is available for added cost. Please call for pricing.

	Isotope	Activity	Half-life	Emissions	Energies
Barium-133	Ba-133	1, 5, 10 uci	10.7 years	Gamma	81.0, 276.3, 302.7, 355.9, 383.7
Cadmium 109	Cd-109	1, 5, 10 uci	453 days	Gamma	88.0
Cesium 137	Cs-137	1, 5, 10 uci	30.1 years	Gamma, Beta	32, 661.6, Beta: 511.6, 1173.2
Cobalt 57	Co-57	1, 5, 10, 25, 50, 75, 100 uci	270 days	Gamma	122.1, 136.4
Cobalt 60	Co-60	0.1, 0.5, 1 uci	5.27 years	Gamma, Beta	1173.2, 1332.5, Beta: 317.9
Europium 152	Eu-152	0.1 to 1 uci	13.52 years	Gamma, Beta
Manganese 54	Mn-54	0.1 to 10 uci	312 days	Gamma	834.8
Polonimum 210	Po-210	0.05 to 0.1 uci	138 days	Alpha	5304.5
Sodium 22	Na-22	0.1 to 10 uci	2.6 years	Gamma	511.0, 1274.5
Strontium 90	Sr-90	0.05 to 0.1 uci	28.5	Beta	546.0
Thallium-204	Tl-204	0.25 to 10 uci	3.783 years	Beta	763.4
Zinc 65	Zn-65	0.1 to 10 uci	244 days	Gamma	1115.5
Cesium 137 / Zinc 65	Cs-Zn	0.5 uci with 1.0 uci	Mixed	Gamma, Beta	32, 661.6, 1115.5

RSS-3

The RSS-3 contains 1 each Po-210, Sr-90 and Co-60 emitting a range of alpha, beta and gamma radiations. This set is ideal for demonstration and introductory nuclear labs covering basic characteristics of radiation.

RSS-5

Containing 1 each Cs-137, Co-60, Sr-90, Tl-204 and Po-210, the RSS-5 provides a wide of alpha, beta and gamma emissions making it a popular choice for nuclear science instruction The set contains two beta emitters, two beta/gamma emitters and one alpha source for in-depth studies of radiation.

RSS-8

Designed for gamma spectroscopy, the RSS-8 contains eight different gamma emitting isotopes covering the entire energy range from 32 to 1333 keV. Also included in the set is a mixed source of Cs-137 and Zn-65 which students may use to identify an “unknown” isotope. The set consists of Ba-133, Cd-109, Co-57, Co-60, Cs-137, Mn-54. Na-22 and Cs/Zn.

Polonium-210 Alpha Source

Due its relatively short half-life, the Po-210 alpha source must be replaced on a regular basis. Currently this is the only alpha emitting byproduct material available as a NRC Exempt Quantity which may be held without a radioactive material license.