Tube Sources for Well Crystals.

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Exempt Radioisotope Sources

Tube & Rod Sources for Well Crystals

NRC § 30.18 Exempt quantities (narrative)
NRC § 30.71 Schedule B Exempt Quantity Radionuclide Regulations (Table)
MSDS/Data Sheet for Sources

We now offer a selection of exempt quantity gamma sources encapsulated in standard size test tubes or rods for use with well type radiation detectors.

These sources are uncalibrated and of nominal activity. The isotope is deposited as a point source in the bottom of the tube and is then sealed with epoxy.

Two tube sizes are stocked as standard, 13x100mm and 12x75mm with other sizes available on special order. Rods are available as 5" x 0.375" and 5" x 0.5".

Activity for Test Tube and Rod sources is recommended at 0.1 uCi.

Higher activity sources to be used in a well detector may cause the detector to give false data or multiple peaks.

Other activities are available on special order up to the maximum NRC Exempt Quantities. Please contact factory for available activity and cost.

Tube and rod sources may be order as Calibrated against the NIST Mixed Gamma Standard, SRM 4275C-125 for an additional, nominal charge.

Isotopes may be selected from the following table. Order by the model number, under either Tube or Rod source.

Isotope		Activity	Half-life	Energies (keV)
Tube	Rod
Ba133TS.1	Ba-133RS.1	0.1uCi.	10.7 years	81.0, 276.3, 303.7, 355.9, 383.7
Cd109TS.1	Cd-109RS.1	0.1uCi.	453 days	88.0
Co57TS.1	Co-57RS.1	0.1uCi.	270 days	122.1, 136.4
Co60TS.1	Co-60RS.1	0.1uCi.	5.27 years	1173.2, 1332.5
Cs137TS.1	Cs-137RS.1	0.1uCi.	30.1 years	32, 661.6
Mn54TS.1	Mn-54RS.1	0.1uCi.	312 days	834.8
Na22TS.1	Na-22RS.1	0.1uCi.	2.6 years	1274.5
Zn65TS.1	Zn-65RS.1	0.1uCi.	244 days	1115.6