EGS point γ sources

Radionuclides are placed between 2 hot-sealed polyester foils approximately 125 μm thick each, then mounted in a plexiglass ring.

The radiological characteristics of the sources are measured with calibrated Nal scintillators or HPGe semi-conductors.

Production Range

Catalog References

Custom/On Request

Active Diameter

3 mm • 0.12 in

From 3 to 50 mm
From 0.12 to 2 in

External Diameter

25 mm • 1 in
38 mm • 1.5 in

From 25 to 75 mm
From 1 to 3 in

Activity

4 kBq • 0.1 μCi
40 kBq • 1.1 μCi
400 kBq • 11 μCi
700 kBq • 19 μCi

From 2 to 1000 kBq
From 0.05 to 27 μCi

Radionuclide

Na-22, Co-57, Co-60, Y-88, Ba-133
Cs-137, Eu-152, Am-241

Ag-110m, Ce-139, Cr-51, Cs-134, Fe-59, I-131
Mn-54, Sn-113 (Non-exhaustive list)

Kits Available

EGS A sources are also available in kits containing 9 sources of 0.11μCi (4kBq), 1.1μCi (40kBq), 11μCi (400kBq), 19μCi (700kBq) : 241Am, 57Co, 60Co, 51Cr, 137Cs, 54Mn, 22Na, 85Sr, 88Y. Other activities are available on request.

**Due to the short half life of Cr51, Mn54, and Sr85, these sources are only available twice per year in April and November. Orders must be placed no later than February 28 and October 31 in order to receive these sources by these months. Alternatively, those radionuclides may be substituted for others to be available anytime.

Reference/Product No.

Radionuclide

Activity*

k=2 measurement uncertainty*

Reference/Product No.

Am-241***

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

≤ 3.5%

Am241 EGS [Type] 10

Am241 EGS [Type] 15

Ba-133

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

400000 Bq • 11 μCi

≤ 2%

Ba133 EGS [Type] 10

Ba133 EGS [Type] 15

Ba133 EGS [Type] 20

Co-57

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

400000 Bq • 11 μCi

≤ 2%

≤ 1.7%

Co57 EGS [Type] 10

Co57 EGS [Type] 15

Co57 EGS [Type] 20

Co-60

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

400000 Bq • 11 μCi

≤ 2%

≤ 1.5%

Co60 EGS [Type] 10

Co60 EGS [Type] 15

Co60 EGS [Type] 20

Cr-51

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

400000 Bq • 11 μCi

≤ 3.5%

≤ 2%

Cr51 EGS [Type] 10

Cr51 EGS [Type] 15

Cr51 EGS [Type] 20

Cs-137

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

400000 Bq • 11 μCi

≤ 2.5%

≤ 2%

Cs137 EGS [Type] 10

Cs137 EGS [Type] 15

Cs137 EGS [Type] 20

Eu-152***

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

≤ 3%

Eu152 EGS [Type] 10

Eu152 EGS [Type] 15

Mn-54

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

400000 Bq • 11 μCi

≤ 2%

Mn54 EGS [Type] 10

Mn54 EGS [Type] 15

Mn54 EGS [Type] 20

Na-22

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

400000 Bq • 11 μCi

≤ 2%

Na22 EGS [Type] 10

Na22 EGS [Type] 15

Na22 EGS [Type] 20

Sr-85

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

400000 Bq • 11 μCi

≤ 2%

Sr85 EGS [Type] 10

Sr85 EGS [Type] 15

Sr85 EGS [Type] 20

Y-88

4000 Bq • 0.11 μCi

40000 Bq • 1.1 μCi

400000 Bq • 11 μCi

≤ 2%

Y88 EGS [Type] 10

Y88 EGS [Type] 15

Y88 EGS [Type] 20

12ML01*

30000 Bq • 0.8 μCi

[3% ; 6%]

12ML01 EGS [Type] 15

Standard manufacturing tolerance: ± 30% | IAEA Category: 5 | ISO2919 Classification: C11111

*Scope N°2-6386 available at www.cofrac.fr or upon request.

** The 12ML01 mixture – Am-241, Cd-109, Ce-139, Co-57, Co-60, Cr-51, Cs-137, Sn-113, Mn-54, Zn-65, Sr-85, Y-88 – generates around 15 peaks over an energy range from 60 keV to 1836 keV. The quantity of each radionuclide is chosen so that the counting rates of the main peak of each radionuclide are the same order of magnitude. Other geometries are available on request.

Due to the short half life of several contained radionuclides in the 12ML01 mixture, it is only available twice per year in April and November. Orders must be placed at least one month prior to receive this mixed source by these production months.

See below for additional information on the 12ML01 mixture and on the other mixes available.

*** Recommended use time 5 years for EGSA/E20 geometry (400kBq), only for radionuclides: 241Am and 152Eu.

How to compose reference/product no.:

Replace [Type] with the letter A or E according to the required geometry. For example: Am241 EGS A 20

12ML01 Mixture

Composition of the mixture

12ML01 60 keV – 1 836 keV

Radionuclides

Main Rays

% in Activity

Cr-51

320 keV

22.1%

Mn-54

835 keV

5.8%

Co-57

122 keV
137 keV

1.1%

Co-60

1,173 keV
1,333 keV

8.2%

Zn-65

1,116 keV

16.5%

Sr-85

514 keV

3.7%

Y-88

898 keV
1,836 keV

6.9%

Cd-109

88 keV

22.4%

Sn-113

392 keV

4.1%

Cs-137

662 keV

5.6%

Ce-139

166 keV

1.4%

Am-241

60 keV

2.2%

Emission Spectrum

Any other mix of Am-241, Ba-133, Co-60, Cs-137 and Eu-152 can be produced on request for specific activities.

Contact Radnostix

Use the link below to contact us or call 1.208.524.5300