Radioactive Check Sources for Training and Calibration
These radioactive 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 without window losses.
Radioisotope, radioactive check sources and radioactive calibration 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.
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Disc Sets
RSS-2
GM Resolving Time Set -This set is used for determining the resolving time of GM Counters. It consists of three half discs, two of which contain 5 microcuries 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-3
The RSS-3 contains 1 each Po-210, Sr-90 and Co-60 emitting a range of alpha, beta and gamma radiation’s. 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.
Lead Shields for Shipping and Storage
The LSD5 shield is used for shipping and storage of 1″ diameter disc sources. With a wall thickness of 0.5”, this container is suitable for higher activity gamma sources and holds up to 14 discs. Outside Dimensions: h= 3.6 x 2.25″, Interior Dimensions: h= 2.65 X 1.25″, 0.5″ thick, approximately 4.6 lbs weight, painted exterior.
The LSD1 and LSD4 are used for shipping and storage of 1 – 8 disks and are painted on both sides for safety
