Tailor-made X and γ solid sources

LEA can adapt on request the activity and the geometry of catalog sources to specific needs. Here are seven examples.

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Multigamma Sources

Multi gamma sources (gamma sources composed of several gamma emitting radionuclides) are mostly used for gamma spectrometry measurement purposes in laboratories. Their purpose is to calibrate the measurement chains over an energy range whose limits depend on their end use.

The most versatile gamma mixture is the 12ML01 mix. The 12ML01 mix 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 of the same order of magnitude.

The 12ML01 mixture can be used with all the previous geometries, such as:

  • Point Sources
  • Resin Matrix
  • Charcoal filter cartridges
  • Vegetable Matrix
  • Paper Matrix


Composition of the mixture

12ML01 60 keV – 1836 keV

Radionuclides

Main rays

% in activity (indicatif)

Emission spectrum

51Cr

320 keV

22.1%

spectre1

54Mn

835 keV

5.8%

57Co

122 keV

137 keV

1.1%

60Co

1 173 keV

1 333 keV

8.2%

65Zn

1 116 keV

16.5%

85Sr

514 keV

3.7%

88Y

898 keV

1 836 kev

6.9%

109Cd

88 keV

22.4%

113Sn

392 keV

4.1%

137Cs

662 keV

5.6%

139Ce

166 keV

1.4%

241Am

60 keV

2.2%

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

Example of other mixes

Radionuclides

Main rays (keV)

Mix code

2ML01

2ML02

2ML04

3ML01

3ML02

3ML07

3ML09

5ML02

241Am

60

-

-

-

-

133Ba

81 – 303 – 356

-

-

-

-

-

60Co

1173 – 1332

-

-

-

137Cs

662

-

152Eu

122 –244 – 344 – 779 – 867 – 964 - 1408

-

-

-

-

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Capsules for radiological ambient measurement monitors

 

Radiological ambient measurement monitors can use a capsule type radioactive source in order to continuously ensure the stability of the system. LEA produces this type of source with an added thread for incorporation on the measuring equipment.

The most requested sources contain 1.4 μCi (50 kBq), 5.4 μCi (200 kBq), 10 μCi (370 kBq) or 24 μCi (900 kBq) of 241Am, 137Cs, 60Co. The activity and the radionuclides can be adapted according to the final requirements.

 

 

Capsules (3)-détourée
Pictures of capsule sources with M3 thread. © LEA
équipement de mesure utilisant source capsule
Example of mesuring equipment using capsule source © CEA
equipement de mesure décapoté
Measuring equipment with casings removed to see the control source. © CEA
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Physical protection of sources

 

LEA can adapt the geometry of its sources for physical protection purposes. For example, for the installation of an anti-theft device.

 

Example in teaching: Beta and Gamma Radiation Counter uses a radioactive source which, for safety purposes, is attached to the system by a chain. The chain is screwed directly onto the radioactive source, via an M3 thread.

 

Source Tiroir

Picture of a Beta and Gamma Radiation Counter. The source, disc type, can be identified by the radioactive trefoil and the chain. © CEA / JEULIN

Crab

Source used in the Beta and Gamma Radiation Counter © LEA

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Specific source holders

 

LEA can design and produce tailor-made source holders, such as:

 

  • source holders adapted to the verification of well detectors used by environmental analysis laboratories or the verification of dose calibrators used in nuclear medicine
  • source holders with threads to be screwed onto customer equipment.

 

All the gamma emitter radionuclides offered in our catalog references can be mounted on specific source holders.

 

EGSD
EGSD
Point Source mounted on rod, specially adapted for well detectors.© LEA
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Wide area gamma sources

 

Our flexible manufacturing process enables us to produce wide area gamma sources with active diameters of several centimeters, for all gamma emitting radionuclides offered by LEA.

 

EGSC
EGSC
CO60 EGS C source © LEA
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Customer specific formats

 

Example #06A Pencil-type sources

 

In order to reduce the radiological exposure or to insert the source inside a well or a small cavity, pencil-type sources are an ideal solution.

Pencil-type sources offered by LEA have a diameter of 0.2 in (5 mm), for a total length of 4 in (10 cm) or 12 in (30 cm). The radionuclide (137Cs in that example), is deposited inside the cap which is, then, sealed with the pencil.

 

Crayon
Pencil of 12 in (30 cm) length © LEA

Example #06B Filiform sources

 

Filiform sources consist of thermosetting resins in which the radionuclides are mixed. Resins are then inserted into a sealed container.

 

Most requested radionuclides: Mixture 3ML01 (60Co, 133Ba, 137Cs), 57Co, 60Co, 137Cs, 152Eu, 241Am

 

Most requested activities: 5.4 μCi (200 kBq), 21.6 μCi (800 kBq), 27 μCi (1 MBq), 81.1 μCi (3 MBq).

 

We can produce sources with all gamma emitters and mixtures of gamma emitters offered by LEA, for activities ranging from 1.1 μCi (40 kBq) to 1.1 mCi (40 MBq).

 

Source filaire

Filiform sources for waste drums © LEA

 

Example of utilization of filiform sources : calibration and control of measuring system for radioactive waste drums

 

Filiform sources 29.5 in (75 cm) long by 0.8 in (2 cm) in diameter containing a radioactive resin 23.6 in (60 cm) long. Ideal for the measurement of radioactive waste drums such as 200 liter I 55 gallon oil drums (≈31.5 in [80 cm] high by 23.6 in [60 cm] in diameter)

 

Sources-filaires
Fût pétrolier
Example of a 200 liters | 55 gallon radioactive drum © ANDRA
Fût pétrolier1
Fût pétrolier2
Fût pétrolier3
Examples of insertion guides for filiform sources
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Calibration and control of whole-body counting systems

 

Example #07A Source for phantom IGOR™

 

IGOR™ whole-body phantoms contain up to 130 polyethylene blocks of different sizes, for simulating different body builds from 26.5 lbs to 242.5 lbs. About 300 sources are needed to reproduce a homogeneous whole-body source term, simulating blood contamination.

 

Most requested radionuclides : 57Co, 60Co, 137Cs, 152Eu, alone or mixed (references 2ML01 or 3ML01)

 

Most requested activities : 0.003 μCi (100 Bq), 0.005 μCi (200 Bq), 0.01 μCi (500 Bq), 0.03 μCi (1 kBq), 0.04 μCi (1.5 kbq)

 

LEA can produce sources with all gamma emitters and mixtures of gamma emitters for other activity levels.

 

 

Sources-filaires-IGOR
IGOR-phantom
Fantôme IGOR™ © RADEK
2020_LEA_PACKSHOT_HD©CRESPEAU-5965
Filiform source for IGOR™ phantom.© LEA

Example #07B Sources for phantom RMC II, ACCUSCAN™ and FASTSCAN™

 

RMC II phantoms are designed for ACCUSCAN™ and FASTSCAN™ whole body counters.

RMC II phantoms simulate the binding of radionuclides in the thyroid, lungs, gastrointestinal system or the whole body, using 1 to 4 radioactive sources inserted in the appropriate slot.

 

Most requested radionuclides: 57Co, 60Co, 137Cs, 152Eu, alone or mixed (references 2ML01 or 3ML01)

 

Most requested activities : 0.003 μCi (100 Bq), 0.005 μCi (200 Bq), 0.01 μCi (500 Bq), 0.03 μCi (1 kBq), 0.04 μCi (1.5 kBq).

 

LEA can produce sources with all gamma emitters and mixtures of gamma emitters for other activity levels.

 

ACCUSCAN
FASTSCAN
ACCUSCAN™ & FASTSCAN™ © MIRION TECHNOLOGIES
Sources-filaires-RMCII
sources cylindriques
Cylindrical sources for Phantom RMC II. © LEA
RMC2 2Tv
Fantôme RMC II™ © MIRION Technologies
LEAContact
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