Wide area α and β sources

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The radionuclides are deposited on a 0.01 in (0.3 mm) thick aluminum substrate (anodized surface), fixed on a stainless steel support of thickness 0.1 in (2.6 mm) ensuring the rigidity of the assembly.

The radiological characteristics (emergent flux) of the sources are measured with a calibrated absolute proportional 2π sr counter.

It should be noted that the size of a calibration source should be adapted to suit the size of the detector to be controlled or calibrated : it is recommended not to use wide area sources to control detectors of a significantly different size from the detector itself. LEA does not provide any guarantee on results for other uses than those recommended.

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	Catalog references	On request
Active diameter
α & β	15 mm 0.6 in	From 15 to 160 mm From 0.6 to 6.3 in
	36 mm 1.4 in
	44 mm 1.7 in
	110 mm 4.3 in
External diameter
α & β	30 mm 1 in	From 20 to 170 mm From 0.8 to 6.7 in
	47 mm 1.9 in
	50 mm 2 in
	120 mm 4.7 in
Activity
α	0.4 kBq 0.01 µCi	From 0.1 to 2 kBq From 0.003 to 0.05 µCi
β	4 kBq 0.11 µCi	De 0.5 à 8 kBq From 0.014 to 0.22 µCi
Radionuclide
α	²³⁸Pu, ²³⁹Pu, ²⁴¹Am	²³³U, ²³⁵U, ²³⁸U
β	¹⁴C, ⁶⁰Co, ⁹⁰Sr, ¹³⁷Cs, ¹⁴⁷Pm	³²P, ³⁵S, ⁴⁵Ca, ⁶³Ni, ⁸⁹Sr, ⁹⁹Tc, ¹²⁹I

	Radionuclide	2π sr alpha flux 2π sr beta flux		k=2 measurement uncertainty	Equivalent activity	Reference
		Under COFRAC* accreditation
α	²⁴¹Am	200	α.s^-1	≤ 6 %	0.4 kBq • 0.01 µCi	AM241 ESA [Type] 20
	²³⁸Pu	200	α.s^-1	≤ 6 %	0.4 kBq • 0.01 µCi	PU238 ESA [Type] 20
	²³⁹Pu⁽¹⁾	200	α.s^-1	≤ 6 %	0.4 kBq • 0.01 µCi	PU239 ESA [Type] 20
β	¹⁴C	1 500	β.s^-1	≤ 6 %	4 kBq • 0.11 µCi	C14 ESA [Type] 20
	⁶⁰Co	1 900	β.s^-1	≤ 6 %	4 kBq • 0.11 µCi	CO60 ESA [Type] 20
	¹³⁷Cs	2 400	β.s^-1	≤ 6 %	4 kBq • 0.11 µCi	CS137 ESA [Type] 20
	¹⁴⁷Pm	1 900	β.s^-1	≤ 6 %	4 kBq • 0.11 µCi	PM147 ESA [Type] 20
	⁹⁰Sr + ⁹⁰Y	2 500	β.s^-1	≤ 6 %	4 kBq • 0.11 µCi	SR90 ESA [Type] 20

	Standard manufacturing tolerance: ± 30% IAEA Category : 5 • ISO2919 Classification: C11111				How to compose the reference ? Replace *[Type]* with the letter K, L, M or N according to the required geometry. For example: SR90 ESA K 20.
	1) Source subject to export control on dual-use goods in accordance with CE Regulation 428/2009 from council of 5 May 2009: an end user certificate will notably be requested from the customer.
	* Scope N°2-6386 available on www.cofrac.fr or upon request.

Wide area α and β sources - Discs

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