Point α sources

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Alpha point sources (EAS) are in the form of a stainless steel disk, unmounted (Type C or D) or sealed on an aluminum ring (Type A or B), at the center of which the radionuclides are electroplated.

Radiological characteristics of the sources are measured with a calibrated grid cell detector.

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Catalog references	On request
Active diameter
15 mm 0.6 in	From 5 to 75 mm From 0.2 to 2.9 in
External diameter
25 mm 1 in	From 25 to 90 mm From 1 to 3.5 in
30 mm 1.2 in
38 mm 1.5 in
Activity
0.3 kBq 0.008 µCi	De 0.01 à 8 kBq From 0.0003 to 0.2 µCi
0.8 kBq 0.02 µCi
3 kBq 0.08 µCi
Radionuclide
²³³U, ²³⁸Pu, ²³⁹Pu, ²⁴¹Am, ²⁴⁴Cm	²³⁵U, ²³⁸U

Radionuclide	2π sr alpha flux		k=2 measurement uncertainty	Equivalent activity	Reference
	Under COFRAC* accreditation
Mix⁽¹⁾ ²³⁹Pu, ²⁴¹Am, ²⁴⁴Cm	400	α.s^-1	≤ 1.5%	0.8 kBq • 0.022 µCi	9ML04 EAS [Type] 25
²⁴¹Am	150	α.s^-1	≤ 1.5%	0.3 kBq • 0.008 µCi	AM241 EAS [Type] 20
²⁴¹Am	1 500	α.s^-1	≤ 1.5%	3 kBq • 0.08 µCi	AM241 EAS [Type] 30
²⁴⁴Cm	150	α.s^-1	≤ 1.5%	0.3 kBq • 0.008 µCi	CM244 EAS [Type] 20
²⁴⁴Cm	1 500	α.s^-1	≤ 1.5%	3 kBq • 0.08 µCi	CM244 EAS [Type] 30
²³⁸Pu	150	α.s^-1	≤ 1.5%	0.3 kBq • 0.008 µCi	PU238 EAS [Type] 20
²³⁸Pu	1 500	α.s^-1	≤ 1.5%	3 kBq • 0.08 µCi	PU238 EAS [Type] 30
²³⁹Pu⁽¹⁾	150	α.s^-1	≤ 1.5%	0.3 kBq • 0.008 µCi	PU239 EAS [Type] 20
²³⁹Pu⁽¹⁾	1 500	α.s^-1	≤ 1.5%	3 kBq • 0.08 µCi	PU239 EAS [Type] 30
²³³U⁽¹⁾	150	α.s^-1	≤ 1.5%	0.3 kBq • 0.008 µCi	U233 EAS [Type] 20

Standard manufacturing tolerance: ± 30% IAEA Category : 5 • ISO2919 Classification: C11111				How to compose the reference ? Replace *[Type]* with the letter *A, B, C or D* according to the required geometry. For example: *U233 EAS C 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.

Point α sources

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