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Gamma radiation sources: Cobalt-57 / Co-57

57Co
Half-life: 271.8 days

Photon energy::

γ114.40 keV (9.2%)
γ2122.06 keV (85.5%)
γ3136.47 keV (10.7%)
Point & disk sources,
capsule a
Disk sources,
capsule b
Ring sources
Penpoint marker sourcesHolders
right click the image and zoom in
Cobalt-57 (57Co) is incorporated in ceramic matrix and sealed in a welded stainless steel capsule.
Other dimensions and activity are available on request.
Code Nominal
activity *
Typical photon output
ph/sec per 10-4 steradian
Overall geometric dimensions
DxH, mm
Active part
dxh, mm
mCi MBq
GCo7.0441) 1 37 2.8x102 3x3 2x1.5
3 111 8.4x102
5 185 1.4x103
10 370 2.8x103
50 1850 1.4x104
GCo7.041 1 37 2.8x102 3x5,3 1.6x1.5
3 111 8.4x102
5 185 1.4x103
10 370 2.8x103
50 1850 1.4x104
GCo7.13** 1 37 2.8x102 3x10 2x1.5
3 111 8.4x102
5 185 1.4x103
10 370 2.8x103
50 1850 1.4x104
GCo7.042 3 111 8.4x102 4x5.3 2.5x1.5
10 370 2.8x103
50 1850 1.4x104
GCo7.045** 50 1850 1.4x104 4x10 3x1.5
70 2590 1.96x104
GCo7.14** 50 1850 1.4x104 7x10 5x2.5
100 3700 2.8x104
GCo7.23 10 370 2.8x103 10x5 8.5x1
50 1850 1.4x104
100 3700 2.8x104
GCo7.21 10 370 2.8x103 12x3 8.5x1
50 1850 1.4x104
100 3700 2.8x104
GCo7.24 10 370 2.8x103 12x3 10x1
50 1850 1.4x104
100 3700 2.8x104

* Tolerance: ±10%
1) ISO classification: C64344
ISO classification: C64444
Recommended working life: 5 years
** IAEA Special Form Certificate: RU/6005/S, old codes: GCo7.12 for GCo7.13, GCo7.13 for GCo7.045, GCo7.22 for GCo7.14
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Main / Products / Gamma radiation sources
   News
08.23.2010
ISO 9001:2008 Qality Management System
RITVERC GmbH has succesfully passed recertification audit of ISO-9001 based Quality Management System

12.23.2008
GAm1.14, GBa3.14 and GCo7.14 sources are given a new strength class C66544 (in accordance with ISO classification).

11.10.2008
An insert is developed to fix Mössbauer sources in the container.

05.07.2008
These sources are used as working standard for calibration of detectors in spectrometers of high-pure germanium.

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