Alpha, Beta, Gamma and Mixed Radiation
These sources are supplied as one inch plastic disks. 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.
These radioactive 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. An optional secondary calibration (+/- 5%) is available for gamma sources. Individual sources for alpha, beta and gamma emissions are available in the following isotopes. Please contact us for a shipping estimate.
| Isotope | Activity | Half-life | Emissions | Energies | ||
|---|---|---|---|---|---|---|
| Barium-133 | Ba-133 | Order Online | 1, 5, 10 uci | 10.7 years | Gamma | 81.0, 276.3, 302.7, 355.9, 383.7 |
| Cadmium 109 | Cd-109 | Order Online | 1, 5, 10 uci | 453 days | Gamma | 88.0 |
| Cesium 137 | Cs-137 | Order Online | 1, 5, 10 uci | 30.1 years | Gamma, Beta | 32, 661.6, Beta: 511.6, 1173.2 |
| Cobalt 57 | Co-57 | Order Online | 1, 5, 10, 25, 50, 75, 100 uci | 270 days | Gamma | 122.1, 136.4 |
| Cobalt 60 | Co-60 | Order Online | 0.1, 0.5, 1 uci | 5.27 years | Gamma, Beta | 1173.2, 1332.5, Beta: 317.9 |
| Europium 152 | Eu-152 | Order Online | 0.1 to 1 uci | 13.52 years | Gamma, Beta | |
| Manganese 54 | Mn-54 | Order Online | 0.1 to 10 uci | 312 days | Gamma | 834.8 |
| Polonimum 210 | Po-210 | Order Online | 0.05 to 0.1 uci | 138 days | Alpha | 5304.5 |
| Sodium 22 | Na-22 | Order Online | 0.1 to 10 uci | 2.6 years | Gamma | 511.0, 1274.5 |
| Strontium 90 | Sr-90 | Order Online | 0.05 to 0.1 uci | 28.5 | Beta | 546.0 |
| Thallium-204 | Tl-204 | Order Online | 0.25 to 10 uci | 3.783 years | Beta | 763.4 |
| Zinc 65 | Zn-65 | Order Online | 0.1 to 10 uci | 244 days | Gamma | 1115.5 |
| Cesium 137 / Zinc 65 | Cs-Zn | Order Online | 0.5 uci with 1.0 uci | Mixed | Gamma, Beta | 32, 661.6, 1115.5 |
RSS-2 GM Resolving Time Set
Includes two active disc sources, one blank
This set is used for determining the resolving time of GM Counters. It consists of three half discs, two of which contain 5 micro curies of Tl-204 plus a third half disc with no activity. The count-rate of each half disc plus the blank (to maintain constant geometry) is measured and then both active half discs are combined for a measurement with high count-rate. The counting loss may now be calculated by adding the rates from each half disc and comparing the result to the count-rate with both halves combined.
RSS-2 Disc Source kit
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RSS-3 Alpha, Beta, Gamma Disc Source Set
Includes three disc sources
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.
(1) Co-60, 1 μCi (37 kBq), sealed disk (1 in. diameter)
(1) Sr-90, 0.1 μCi (3.7 kBq), sealed disk (1 in. diameter)
(1) Po-210, 0.1 μCi (3.7 kBq), unsealed disk (1 in. diameter)
RSS-3 Disc Source Kit
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RSS-5 Alpha, Beta, Gamma Disc Source Set
Includes five disc sources
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.
(1) Co-60, 1 μCi (37 kBq), sealed disk (1 in. diameter)
(1) Cs-137, 5 μCi (185 kBq), sealed disk (1 in. diameter)
(1) Tl-204, 1 μCi (37 kBq), sealed disk (1 in. diameter)
(1) Sr-90, 0.1 μCi (3.7 kBq), sealed disk (1 in. diameter)
(1) Po-210, 0.1 μCi (3.7 kBq), unsealed disk (1 in. diameter)
RSS-5 Disc Source Kit
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RSS-8 Alpha, Beta, Gamma Disc Source Set
Includes 8 Disc Sources
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, each at 1 uci. The mixed source includes Cs-137 at 0.5 uci and Zn-65 at 1 uci.
RSS-8 Disc Source Kit
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PO-210 Alpha Source, 0.1 uCi
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.
