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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Source alpha EASA
EASB
Source alpha EASC
EASD
Source alpha EASA Source alpha EASB Source alpha EASC Source alpha EASD
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Catalog references

On request

Active diameter

15 mm Ÿ 0.6 in

From 5 to 75 mm

From 0.2 to 2.9 in

External diameter

25 mm Ÿ 1 in

From 25 to 90 mm

From 1 to 3.5 in

30 mm Ÿ 1.2 in

38 mm Ÿ 1.5 in

Activity

300 Bq Ÿ 0.008 µCi

De 10 à 8 000 Bq

From 0.0003 to 0.2 µCi

800 Bq Ÿ 0.02 µCi

3 000 Bq Ÿ 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%

800 Bq • 0.022 µCi

9ML04 EAS [Type] 25

 

241Am

150

α.s-1

≤ 1.5%

300 Bq • 0.008 µCi

AM241 EAS [Type] 20

 

1 500

α.s-1

≤ 1.5%

3 000 Bq • 0.08 µCi

AM241 EAS [Type] 30

 

244Cm

150

α.s-1

≤ 1.5%

300 Bq • 0.008 µCi

CM244 EAS [Type] 20

 

1 500

α.s-1

≤ 1.5%

3 000 Bq • 0.08 µCi

CM244 EAS [Type] 30

 

238Pu

150

α.s-1

≤ 1.5%

300 Bq • 0.008 µCi

PU238 EAS [Type] 20

 

1 500

α.s-1

≤ 1.5%

3 000 Bq • 0.08 µCi

PU238 EAS [Type] 30

 

239Pu(1)

150

α.s-1

≤ 1.5%

300 Bq • 0.008 µCi

PU239 EAS [Type] 20

 

1 500

α.s-1

≤ 1.5%

3 000 Bq • 0.08 µCi

PU239 EAS [Type] 30

 

233U(1)

150

α.s-1

≤ 1.5%

300 Bq • 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.

 
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