P O L Y T E C R.M. S.R.L.

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1 INFORMACIÓN FUENTES EXCEPTUADAS PARA ENSEÑANZA RSS-2 G-M 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. ORDER: RSS2- SN-9798 This set is used for determining the resolving time of GM counters. It consists of 3 half-discs: 2 of 5 microcuries of Tl-204, plus a third 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 is calculated by adding the rates from each half-disc and comparing the result to the count-rate with both. RSS-3 Radioactive Sources (set of 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. The Co-60 is 1.0 uci and the Po-210 and Sr-90 are 0.1 uci activity. ORDER: RSS3 - SN-8110 Página 1 de 6

2 Sources are mounted in 2.5 cm diameter sealed plastic disks. Po-210, 0.1 µci, 138 days, alpha Sr-90, 0.1 µci, 28.6 years, beta Co-60, 1 µci, 5.27 years, beta and gamma Specifications Disk: Diameter: 25 mm Thickness: 4.45 mm Internal Hole Diameter: 6.35 mm Hole Bottom Thickness: 0.38 mm Radioactive Source: Diameter: 2-3 mm Evaporated on the inner surface of the hole RSS-5 Radioactive Sources (set of 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. The Cs-137 is 5 uci, the Po-210 and Sr-90 are 0.1 uci activity and the Co-60 and Tl-204 are both 1 uci. ORDER: RSS5 - SN-7972A The following sources are mounted in 2.5 cm diameter sealed plastic disks. Shown below are the isotopes, activity, half-life and types of radiation (alpha-α, beta-β;, gamma-γ). Página 2 de 6

3 Po-210, 0.1 µci, 138 days, alpha Sr-90, 0.1 µci, 28.6 years, beta Tl-204, 0.25 µci, 3.78 years, beta Co-60, 1 µci, 5.27 years, beta and gamma Cs-137, 0.25 µci, 30.2 years, beta and gamma Specifications Disk: Diameter: 25 mm Thickness: 4.45 mm Internal Hole Diameter: 6.35 mm Hole Bottom Thickness: 0.38 mm Radioactive Source: Diameter: 2-3 mm Evaporated on the inner surface of the hole RSS-8 Gamma Sources (set of 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. Source activities are all 1 uci, except the Cs/Zn source, which is 0.5 uci Cs and 1 uci Zn. ORDER: RSS8 - SN-7949A The following set of eight gamma sources are mounted in 2.5 cm diameter sealed plastic disks and require no licensing. Shown below are the isotopes, activity, half-life and types of radiation (beta-ß, gamma-γ). Co-60, 1 µci, 5.27 years, beta and gamma Na-22, 1 µci, 2.60 years, beta+ and gamma Página 3 de 6

4 Mn-54, 1 µci, 313 days, gamma Cs-137, 0.25 µci, 30.2 years, beta and gamma Ba-133, 1 µci, 10.5 years, gamma Cd-109, 1 µci, 464 days, gamma Co-57, 1 µci, 270 days, gamma "UNKNOWN" -- mixture of Cs-137 and Zn-65 for student testing Specifications Disk: Diameter: 25 mm Thickness: 4.45 mm Internal Hole Diameter: 6.35 mm Hole Bottom Thickness: 0.38 mm Radioactive Source: Diameter: 2-3 mm Evaporated on the inner surface of the hole Isotope Generator Kit (Barium-137 m) Isotope Generator This Cs-137/Ba-137m Isotope Generator is used to conduct experiment in schools and universities to demonstrate the properties of radioactive decay. Based on the original Union Carbide patented design, it offers exceptional performance combined with ease of use and safe operation. Each generator contains 10uCi. of Cs-137 which represents one Exempt Quantity making if free from specific State and Federal licensing. The generator can produce up to 1000 small aliquots of the short lived Ba-137m isotope with a half-life of 2.6 minutes. Each generator is supplied with 250 ml of eluting solution (0.9% NaCl) and additional solution may be ordered separately. The parent isotope Cs-137 with a half-life of 30.1 years beta decays (94.6%) to the metastable state of Ba-137m. This further decays by Página 4 de 6

5 gamma emission (662 kev) with a half-life of 2.6 minutes to the stable Ba-137 element. During elution, the Ba-137m is selectively "milked" from the generator leaving behind the Cs-137 parent. Regeneration of the Ba-137m occurs as the Cs-137 continues to decay, re-establishing equilibrium in less than 1 hour. Approximately 30 minutes after elution, the residual activity of the Ba-137m sample has decayed to less than one thousandth of its initial activity making it safe for disposal. When used with the eluting solution supplied, bleed through of the parent Cs-137 is less than 50 Bq/ml, affording a long working life. Each kit is supplied with the generator, syringe, tube, 250ml of eluting solution and a convenient storage case. ORDER: ISO = Isotope Generator Kit. 10 uci. ELSN = Extra Eluting Solution. 250 ml. CC100 = Bag of 100 planchets, 1" diameter. ISO--SN-7995A This Cs-137/Ba-137 m Isotope Generator is used to demonstrate the properties of radioactive decay. Based on the original Union Carbide patented design, it offers exceptional performance, ease-of-use and safe operation. Each generator contains 10 µci of Cs-137. The generator can produce up to 1000 small aliquots of the short-lived Ba-137m isotope with a half-life of 2.6 minutes. Each generator is supplied with 250 ml of eluting solution (0.9% NaCl in 0.04M HCl). The parent isotope Cs-137 with a half-life of 30.1 years beta decays (94.6%) to the metastable state of Ba-137m. This further decays by gamma emission (662 kev) with a half-life of 2.6 min. to the stable Ba-137 element. During elution, the Ba-137m is selectively "milked" from the generator, leaving behind the Cs-137 parent. Regeneration of the Ba-137m occurs as the Cs-137 continues to decay, re-establishing equilibrium in less than 1 hour. Approximately 30 minutes after elution, the residual activity of the Ba-137m sample has decayed to less than one thousandth of its initial activity, making it safe for disposal. When used with the eluting solution supplied, bleed through of the parent Cs-137 is less than 50 Bq/mL, affording a long working life. Each kit is supplied with the generator, syringe, tube, 250 ml of solution and a storage case. The source is USNRC License Exempt (US only). Outside the US, consult local laws and regulations. NS-Po210 Página 5 de 6

6 Pb-210 Source Needle Needle sources are used to generate a point source of radiation inside cloud chambers for demonstrating alpha and beta radiation tracks. Three different types of isotopes are offered, a pure alpha emitter, a pure beta emitter and a combined alpha /beta emitter. The sources are constructed by depositing a small, license exempt quantity of radioactive isotope onto the eye of a standard sewing needle which is mounted on a test tube stopper for insertion into the could chamber. The needle and stopper are placed into test tube for protection during shipping and storage. Po-210 Needle. This alpha emitter contains 0.01 microcuries of Polonium-210. ORDER: NSPO210 - SE-7945 Needle source is used to generate a point source of radiation inside cloud chambers for demonstrating alpha and beta radiation tracks. A replacement part for Diffusion Cloud Chambers (SE-7943, SE-7944A). The source is constructed by depositing a small quantity of radioactive isotope onto the eye of a standard sewing needle which is mounted on a test tube stopper for insertion into the cloud chamber. The needle and stopper are placed into a test tube for protection during shipping and storage. Three different types of isotopes are offered, a pure alpha emitter, a pure beta emitter and a combined alpha /beta emitter. NS-Po210 Po-210 Needle. This alpha emitter contains 0.01 microcuries of Polonium-210. ORDER: NSPO210 NS-Sr90 Sr-90 Needle. A beta emitter containing 0.01 microcuries of Strontium-90. ORDER: NSSR90 NS-Pb210 Pb-210 Needle microcuries of Lead-210 in equilibrium with its daughters Bi-210 and Po-210, produces a source of both alpha and beta particles. The source is USNRC License Exempt (US only). Outside the US, consult local laws and regulations Conrado König Responsable técnico Permiso Individual Nº 19606/1/2/06-14, 19513/1/2/06-14, 21004/0/1/12-12 y 22819/0/0/04-12 Página 6 de 6