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Overview Point Sources
The products shown on these pages are representative sources used for common applications.
If you cannot find the product with your specifications, please contact us using the corresponding email contact on this website. In most cases we will be able provide you with a solution meeting your requirements.
You can also use our product request forms.
Download catalogue.
Please select from the categories below:
Rectangular Type Sources
Construction
The radioactive isotope is absorbed in an ion-exchange bead approximately 1mm in diameter. The bead is fixed inside a solid plastic capsule. The active bead is visible, and located at the geometric centre of the source. The engraving is color-coded.
ISO classification
ISO/12/C34343
Drawing: VZ-1240-001
Tolerance
The maximum deviation of the delivered activity from the nominal values is -10% to +30% for all radionuclides with the exception of Hg-203 which is -10% to +50%.
Absorption corrections
The effect of absorption and scattering in the source depends on the measurement geometry and the measurement equipment. The table below shows the transmission factor for the main gamma rays emitted. Transmission factors at other energies may be calculated by interpolation. The transmission factor is the fraction of gamma rays produced in the source that will emerge from its surface calculated for narrow beam emission normal to the plane of the source.
Energy [keV] | Radionuclide | Transmission factor |
---|---|---|
60 | Am-241 | 0.970 |
88 | Cd-109 | 0.981 |
122 | Co-57 | 0.982 |
279 | Hg-203 | 0.986 |
344 | Eu-152 | 0.987 |
662 | Cs-137 | 0.990 |
834 | Mn-54 | 0.991 |
1173 | Co-60 | 0.993 |
1836 | Y-88 | 0.994 |
Ordering Information – Single radionuclides
Radionuclide | Activity [kBq] | Overall uncertainty [%] | Product code (DAkkS certificate) |
---|---|---|---|
Am-241 | 37 | 3 | AMR1122 |
370 | 3 | AMR1152 | |
Ba-133 | 37 | 3 | BDR1122 |
370 | 3 | BDR1152 | |
Cd-109 | 37 | 4 | CUR1122 |
370 | 4 | CUR1152 | |
Cs-137 | 37 | 3 | CDR1122 |
370 | 3 | CDR1152 | |
Co-57 | 37 | 3 | CTR1122 |
370 | 3 | CTR1152 | |
Co-60 | 37 | 3 | CKR1122 |
370 | 3 | CKR1152 | |
Eu-152 | 37 | 3 | EFR1122 |
370 | 3 | EFR1152 | |
Hg-203 | 74 | 4 | MBR1222 |
740 | 4 | MBR1252 | |
Mn-54 | 37 | 3 | MFR1122 |
370 | 3 | MFR1152 | |
Na-22 | 37 | 3 | SKR1122 |
370 | 3 | SKR1152 | |
Y-88 | 37 | 3 | YER1122 |
370 | 3 | YER1152 |
Radionuclide sets
Each set of sources is supplied in a presentation box which also contains a pair of forceps, two positron absorbers, and an adaptor plate. For easy reference, a copy of the calibration information is shown in the lid of the box.
Ordering Information – Radionuclide Sets
Radionuclide | Activity [kBq] | Product code (DAkkS certificate) |
---|---|---|
Set 1 containing: QCR3110 (total activity: 370 kBq) | ||
Am-241 | 37 | |
Ba-133 | 37 | |
Cs-137 | 37 | |
Co-57 | 37 | |
Co-60 | 37 | |
Hg-203 | 74 | |
Mn-54 | 37 | |
Na-22 | 37 | |
Y-88 | 37 | |
Set 2 containing: QCR310 (total activity: 3.7 MBq) | ||
Am-241 | 370 | |
Ba-133 | 370 | |
Cs-137 | 370 | |
Co-57 | 370 | |
Co-60 | 370 | |
Hg-203 | 740 | |
Mn-54 | 370 | |
Na-22 | 370 | |
Y-88 | 370 |
Gamma Standards – Type C
The type C configuration can be used to check the performance of G.M. and NaI (Tl) detectors. The maximim activity of this source type is 370 kBq. Please enquire.
Overall Dimensions | |||
---|---|---|---|
Height | Width | Length | Active Diameter |
0.075” | 0.43” | 0.925” | 0.118” |
1.91 mm | 11 mm | 23.5 mm | 3 mm |
Window & Active Deposit | |
---|---|
Window | Nature of Active Deposit |
Plastic | Evaporated Metallic Salts |
Disk Type Sources
Construction
With the exception of Ra-226, Am-241 and Pb-210sources,the radioactive isotope is absorbed in an ion-exchange bead approximately 1mm in diameter. The bead is fixed inside a solid plastic capsule 25mm in diameter and 3mm thick. The active bead is visible, and located at the geometric centre of the source.
For Am-241 and Pb-210, the active component is in the form of a ceramic bead. For Ra-226, a foil is sealed and fixed inside a 6 mm thick plastic disc. This construction reduces the possibility of release of radon gas from the decay of Ra-226.
Tolerances
The maximum deviation of the delivered activity from the nominal values is -10% to +30% for all radionuclides with the exception of Hg-203 (which is -10% to +50%) and Ra-226 (which is ±30%).
ISO classification
ISO/12/C34313
Drawing: VZ-477-001
Drawing: VZ-478-001 (Pb-210, Am-241)
Drawing: VZ-3293-001 (Ra-226)
Absorption corrections
The effect of absorption and scattering in the source depends on the measurement geometry and the measurement equipment. The table shows the transmission factor for the main gamma rays emitted. Transmission factors at other energies may be calculated by interpolation. The transmission factor is the fraction of gamma-rays produced in the source that will emerge from its surface calculated for narrow beam emission normal to the plane of the source.
Energy [keV] | Radionuclide | Transmission factor |
---|---|---|
47 | Pb-210 | 0.964 |
60 | Am-241 | 0.958 |
88 | Cd-109 | 0.970 |
122 | Co-57 | 0.973 |
279 | Hg-203 | 0.979 |
344 | Eu-152 | 0.979 |
356 | Ba-133 | 0.984 |
662 | Cs-137 | 0.985 |
834 | Mn-54 | 0.987 |
1173 | Co-60 | 0.988 |
1274 | Na-22 | 0.991 |
1836 | Y-88 | 0.991 |
Ordering Information – Single radionuclides
Radionuclide | Nominal activity [kBq] | Overall uncertainty [%] | Product code (DAkks certificate) |
---|---|---|---|
Am-241 | 37 | 3 | AMR8122 |
370 | 3 | AMR8152 | |
Ba-133 | 37 | 3 | BDR8122 |
370 | 3 | BDR8152 | |
3700 | 3 | BDR8252 | |
Cd-109 | 370 | 4 | CUR8152 |
Cs-137 | 37 | 3 | CDR8122 |
370 | 3 | CDR8152 | |
3700 | 3 | CDR8252 | |
Co-57 | 37 | 3 | CTR8122 |
370 | 3 | CTR8152 | |
3700 | 3 | CTR8252 | |
Co-60 | 37 | 3 | CKR8122 |
370 | 3 | CKR8152 | |
3700 | 3 | CKR8252 | |
Eu-152 | 37 | 3 | EFR8122 |
370 | 3 | EFR8152 | |
Hg-203 | 74 | 4 | MBR8222 |
740 | 4 | MBR8252 | |
Mn-54 | 37 | 3 | MFR8122 |
370 | 3 | MFR8152 | |
Na-22 | 37 | 3 | SKR8122 |
370 | 3 | SKR8152 | |
Pb-210 | 200 | 4 | RBR8122 |
Y-88 | 37 | 3 | YER8122 |
370 | 3 | YER8152 |
Radionuclide set
The set contains 8 sources of long-lived radionuclides for calibrating gamma ray spectrometers from 46keV to 1836keV.
The set of sources is supplied in a presentation box and includes a positron absorber. For easy reference, a copy of the calibration information is shown in the lid of the box.
Ordering information – Radionuclide set
Radionuclide | Activity [kBq] | Product code (DAkkS certificate) |
---|---|---|
Set comprising: | QCRB9481 (total activity: 452 kBq) | |
Am-241 | 37 | |
Ba-133 | 37 | |
Cs-137 | 37 | |
Co-60 | 37 | |
Eu-152 | 37 | |
Na-22 | 37 | |
Pb-210 | 200 | |
Ra-226 | 30 |
Gamma Standards - Type D
The type D configuration is mainly used for checking the performance of G.M. and NaI(Tl) detectors. The type D disk is a 1” (25.4 mm) diameter by 0.250” (6.35 mm) thick disk constructed of high strength plastic. The active diameter is 0.197” (5 mm).
Overall Diameter | Active Diameter | Height |
---|---|---|
1” |
0.197” | 0.25” |
25.4 mm | 5 mm | 6.35 mm |
Window & Active Deposit | |
---|---|
Window | Nature of Active Deposit |
Plastic | Evaporated Metallic Salts |
Nuclide | Model no. | Activity range | Remark |
---|---|---|---|
Ag-110m | GF-110-D | 3,7 kBq – 3,7 MBq | On Request |
Am-241 | GF-241-D | 3,7 kBq – 3,7 MBq | |
Ba-133 | GF-133-D | 3,7 kBq – 3,7 MBq | |
Be-7 | GF-007-D | 3,7 kBq – 3,7 MBq | |
Bi-207 | GF-207-D | 3,7 kBq – 3,7 MBq | |
Cd-109 | GF-109-D | 3,7 kBq – 18,5 MBq | |
Ce-139 | GF-139-D | 3,7 kBq – 3,7 MBq | |
Ce-141 | GF-141-D | 3,7 kBq – 3,7 MBq | On Request |
Co-56 | GF-056-D | 3,7 kBq – 3,7 MBq | On Request |
Co-57 | GF-057-D | 3,7 kBq – 37 MBq | |
Co-58 | GF-058-D | 3,7 kBq – 3,7 MBq | On Request |
Co-60 | GF-060-D | 3,7 kBq – 18,5 MBq | |
Cr-51 | GF-051-D | 3,7 kBq – 3,7 MBq | |
Cs-134 | GF-134-D | 3,7 kBq – 3,7 MBq | |
Cs-137 | GF-137-D | 3,7 kBq – 37 MBq | |
Eu-152 | GF-152-D | 3,7 kBq – 3,7 MBq | |
Eu-154 | GF-154-D | 3,7 kBq – 3,7 MBq | |
Eu-155 | GF-155-D | 3,7 kBq – 3,7 MBq | |
Fe-59 | GF-059-D | 3,7 kBq – 3,7 MBq | On Request |
Gd-153 | GF-153-D | 3,7 kBq – 18,5 MBq | |
Ge-68 | GF-068-D | 3,7 kBq -20 MBq | |
Ho-166m | GF-166-D | 3,7 kBq – 370 kBq | |
I-125 | GF-125-D | 3,7 kBq – 3,7 MBq | special nuclide, Please check availability. |
I-129 | GF-129-D | 3,7 kBq – 3,7 MBq | |
I-131 – Mock | GF-131SIM-D | 37 kBq – 370 kBq | Contains mixture of Ba-133/ Cs-137 (simulates I-131) |
Hg-203 | GF-203-D | 370 kBq – 3,7 MBq | |
Mn-54 | GF-054-D | 3,7 kBq – 3,7 MBq | |
Na-22 | GF-022-D | 3,7 kBq – 3,7 MBq | |
Ra-226 | GF-226-D | 3,7 kBq – 370 kBq | |
Sb-124 | GF-124-D | 3,7 kBq – 3,7 MBq | On Request |
Sb-125 | GF-125A-D | 3,7 kBq – 3,7 MBq | |
Sc-46 | GF-046-D | 3,7 kBq – 3,7 MBq | On Request |
Se-75 | GF-075-D | 3,7 kBq – 3,7 MBq | |
Sn-113 | GF-113-D | 3,7 kBq – 3,7 MBq | |
Sr-85 | GF-085-D | 3,7 kBq – 3,7 MBq | |
Th-228 | GF-228-D | 3,7 kBq – 370 kBq | |
U-235 | GF-235-D | 3,7 kBq | |
U-238 (Natural) | GF-238U-D | 3,7 kBq | On Request |
Y-88 | GF-088-D | 3,7 kBq – 3,7 MBq | |
Zn-65 | GF-065-D | 3,7 kBq – 3,7 MBq | |
Zr-95/Nb-95 | GF-095-D | 3,7 kBq – 3,7 MBq | On Request |
Ordering Information – Source sets
Each set contains:
Ba-133, Cd-109, Co-57, Co-60, Cs-137, Mn-54 and Na-22
Model No. | Total activity | Product code | Remarks |
---|---|---|---|
GF-290-0.1D | 25,9 kBq | GF-290-0,1D | 7 sources each 3.7kBq |
GF-290-1D | 259 kBq | GF-290-1D | 7 sources each 37kBq |
GF-290-10D | 25,9 MBq | GF-290-10D | 7 sources each 370kBq |
Gamma Standards - Type M
The type M thin “scatterless” disk is used in applications involving high resolution solid state detectors. The activity is deposited on 9 mg/cm2 aluminumized Mylar (polyester) disk, and covered with 0.9 mg/cm2 Kapton (polymide). The source is supplied in a removable aluminum holder. In the holder the source has an overall diameter of 1” (25.4 mm) and a thickness of 0.125” (3.18 mm). Out of the holder the source is 0.937” (23.8 mm) in diameter with a thickness of approximately 0.030” (0.76 mm). The active diameter is 0.12” (3 mm).
Overall Diameter | Active Diameter | Height |
---|---|---|
1” | 0.12” | 0.125” |
25.4 mm | 3 mm | 3.18 mm |
Window | Nature of Active Deposit |
---|---|
0.010” (254 µm) Aluminized Mylar | Evaporated Metallic Salts |
Exceptions |
---|
Fe-55: 0.00025″ (0.0064 mm) Aluminized Mylar |
Am-241: 0.001” (0.0254 mm) Aluminum and Platinum Foils |
Nuclide | Product code | Activity range | Remarks |
---|---|---|---|
Ag-110m | GF-110-M | 3,7 kBq – 3,7 MBq | On Request |
Am-241 | GF-241-M | 3,7 kBq – 370 kBq | |
Ba-133 | GF-133-M | 3,7 kBq – 3,7 MBq | |
Be-7 | GF-007-M | 3,7 kBq – 3,7 MBq | |
Bi-207 | GF-207-M | 3,7 kBq – 3,7 MBq | |
Cd-109 | GF-109-M | 3,7 kBq – 3,7 MBq | |
Ce-139 | GF-139-M | 3,7 kBq – 3,7 MBq | |
Ce-141 | GF-141-M | 3,7 kBq – 3,7 MBq | On Request |
Co-56 | GF-056-M | 3,7 kBq – 3,7 MBq | On Request |
Co-57 | GF-057-M | 3,7 kBq – 3,7 MBq | |
Co-58 | GF-058-M | 3,7 kBq – 3,7 MBq | On Request |
Co-60 | GF-060-M | 3,7 kBq – 3,7 MBq | |
Cr-51 | GF-051-M | 3,7 kBq – 3,7 MBq | On Request |
Cs-134 | GF-134-M | 3,7 kBq – 3,7 MBq | On Request |
Cs-137 | GF-137-M | 3,7 kBq – 3,7 MBq | |
Eu-152 | GF-152-M | 3,7 kBq – 3,7 MBq | |
Eu-154 | GF-154-M | 3,7 kBq – 3,7 MBq | |
Eu-155 | GF-155-M | 3,7 kBq – 3,7 MBq | |
Fe-55 | GF-055-M | 3,7 kBq – 3,7 MBq | |
Fe-59 | GF-059-M | 3,7 kBq – 3,7 MBq | On Request |
Gd-153 | GF-153-M | 3,7 kBq – 3,7 MBq | |
Ge-68 | GF-068-M | 3,7 kBq – 3,7 MBq | |
Ho-166m | GF-166-M | 3,7 kBq – 37 kBq | |
I-131 – Mock | GF-131SIM-M | 37 kBq – 370 kBq | Contains mixture of Ba-133/ Cs-137 (simulates I-131) |
Hg-203 | GF-203-M | 370 kBq – 3,7 MBq | |
Mn-54 | GF-054-M | 3,7 kBq – 3,7 MBq | |
Na-22 | GF-022-M | 3,7 kBq – 3,7 MBq | |
Sb-124 | GF-124-M | 3,7 kBq – 3,7 MBq | On Request |
Sb-125 | GF-125A-M | 3,7 kBq – 3,7 MBq | |
Sc-46 | GF-046-M | 3,7 kBq – 3,7 MBq | On Request |
Se-75 | GF-075-M | 3,7 kBq – 3,7 MBq | |
Sn-113 | GF-113-M | 3,7 kBq – 3,7 MBq | |
Sr-85 | GF-085-M | 3,7 kBq – 3,7 MBq | |
Y-88 | GF-088-M | 3,7 kBq – 3,7 MBq | |
Zn-65 | GF-065-M | 3,7 kBq – 3,7 MBq | |
Zr-95/Nb-95 | GF-095-M | 3,7 kBq – 3,7 MBq | On Request |
Ordering Information – Source sets
Each set consists of:
Ba-133, Cd-109, Co-57, Co-60, Cs-137, Mn-54 and Na-22
Model no. | Total activity | Product code | Remarks |
---|---|---|---|
GF-290-0.1M | 25,9 kBq | GF-290-0,1M | 7 sources each 3.7kBq |
GF-290-1M | 259 kBq | GF-290-1M | 7 sources each 37kBq |
GF-290-10M | 2,59 MBq | GF-290-10M | 7 sources each 370kBq |
Mixed radionuclide calibration sources for 60-1836 keV and 46-136 keV ranges
Application
The QCD1 source can be used for calibrating high resolution gamma-ray spectrometers where a solid source with minimal self-absorption is required. The energy range covered is 88-1836keV.
Certification
The source is supplied with a UKAS certificate of calibration.
Construction
The source is prepared by dispensing an accurately weighed aliquot of mixed radionuclide solution onto a polyester tape 0.06mm thick. The aliquot is dried in an atmosphere of hydrogen sulphide to prevent volatilization of mercury, and then covered with a second layer of tape. The active deposit is approximately 5 mm in diameter. The tape is attached to a 1mm thick aluminium annulus of inner diameter 38mm and outer diameter 54mm. The source is constructed of thin polyester tape to minimize self-absorption of the gamma-rays. The source should be handled carefully by its aluminium ring using rubber-tipped forceps.
Ordering Information
Radionuclides | Activity [kBq] | Gamma-ray energy [keV] | Overall uncertainty [%] | Product code (DAkkS certificate) |
---|---|---|---|---|
Radionuclide mixture NG3 containing: | QCRB1186 (total activity: 40 kBq) | |||
Am-241 | 3 | 60 | 3 | |
Cd-109 | 15.6 | 88 | 4 | |
Co-57 | 0.6 | 122 | 2.5 | |
Ce-139 | 0.7 | 166 | 2.5 | |
Hg-203 | 2.1 | 279 | 2.5 | |
Sn-113 | 2.8 | 392 | 5 | |
Sr-85 | 3.8 | 514 | 2.5 | |
Cs-137 | 2.6 | 662 | 2.5 | |
Co-60 | 3.0 | 1173 | 1 | |
1333 | 1 | |||
Y-88 | 5.9 | 898 | 4 | |
1836 | 4 | |||
Radionuclide mixture NG4 containing: | QCRB4136 (total activity: 46 kBq) | |||
Pb-210 | 20 | 47 | 5 | |
Am-241 | 4 | 60 | 3 | |
Cd-109 | 20 | 88 | 4 | |
Co-57 | 2 | 122 | 2.5 | |
Radionuclide mixture NG2 containing: | QCRB13892 (total activity: 37 kBq) | |||
Cd-109 | 15.6 | 88 | 4 | |
Co-57 | 0.6 | 122 | 2.5 | |
Ce-139 | 0.8 | 166 | 2.5 | |
Hg-203 | 2.2 | 279 | 2.5 | |
Sn-113 | 2.8 | 392 | 5 | |
Sr-85 | 3.6 | 514 | 2.5 | |
Cs-137 | 2.6 | 662 | 2.5 | |
Co-60 | 3 | 1173 | 1 | |
1333 | 1 | |||
Y-88 | 5.8 | 898 | 4 | |
1836 | 4 |
Source for NaI spectrometers
Application
This source type is used for the energy calibration of NaI spectrometers, or as a check source for Ge-spectrometers.
Construction
The activity of each radionuclide is adsorbed in one ion exchange bead 1mm in diameter. The beads are mounted in a plastic disc 25mm in diameter and 3mm thick (drawing VZ-1285).
Ordering information
Radionuclide | Nominal activity [kBq] | Product code |
---|---|---|
Am-241 | 37 | QCRB5936 (total activity: 148 kBq) |
Co-57 | 37 | |
Co-60 | 37 | |
Cs-137 | 37 | |
Na-22 | 3700 |