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Radiation detection module
C12137-00D
High accuracy, High sensitivity, compact radiation detection module
The C12137 series is a radiation detection module containing a scintillator and MPPC (multi-pixel photon counter) designed to detect gamma rays from 137Cs (Cesium-137) and the like. The scintillator converts incident gamma rays into visible light, and the MPPC detects the light down to extremely low light levels to measure low-energy gamma rays with high accuracy. The signal processing circuit and A/D converter are housed in a compact case. The modules provide a USB or RS-232C interface. The products include sample software with functions for setting measurement conditions, acquiring and saving date, and drawing graphs, etc.
Features
- Gamma ray energy discrimination
- Modular design for easy integration into devices
- Compact and lightweight
Features
Detection of low energy gamma rays and energy discrimination
The C12137 series is capable of acquiring an energy spectrum as well as providing accurate energy discrimination.
137Cs is known to decay while emitting gamma rays at energies around 662 keV and around 32 keV. Acquiring an energy spectrum down to low energy gamma rays around 30 keV allows determining whether those gamma rays are derived from 137Cs .
When the energy of gamma rays entering a scintillator falls to a low level, the light level emitted from the scintillator in response to the gamma rays is also very low. The C12137 series uses a high sensitivity MPPC that allows detecting gamma rays over a wide range.
Easy integration in devices
Schematic cross section (C12137-01)
Since the radiation detection module includes a scintillator, photosensor (MPPC), signal processing circuit, interface circuit, and the like in a small case, it can easily be incorporated into portable measuring instruments and in-line measuring instruments.
In the C12137 series, the photosensor MPPC is a small, thin type. The MPPC takes up a small portion of the entire space: the space is predominantly is taken up by the scintillator. This shows that even though the radiation detection module is small, it can provide high photon detection effi ciency.
Because the radiation detection module is compact, it is advantageous in applications where the radiation dose from the object under measurement is minute. Such applications include inspection of food and beverages. In these types of applications, the periphery of the detector must be covered with lead to eliminate the eff ects of environmental radiation. Because the radiation detection module is compact, the amount of used lead can be reduced, which in turn reduces the volume and weight of the entire device
Sample software included
Hamamatsu also provides sample software for initial evaluation of our radiation detector modules.
Basic sample software functions are setting measurement parameters, acquiring and saving data, and displaying measurement data graphs. To help users develop their own application software for operating our radiation detector module while installed into equipment, we also provide function specifications and source codes of the sample software.
* The C12137 series can be connected to a PC via USB or RS-232C. Graphical display of acquired data is available only for USB type.
Specifications
| Window material | MPPC |
|---|---|
| Scintillator | Csl(Tl) |
| Scintillator size | 13 x 13 x 20 mm |
| Sampling time | 10 to 60 s, adjustable |
| Bit rate | 115200 bps |
| Power supply | +5 V |
| Energy range | 0.03 to 2 MeV |
| Energy resolution | 8 % |
| Measurement condition | Counting dfficiency: 137Cs, 0.01 μSv/h Energy resolution: 137Cs, 662 keV |
Dimensional outline (unit: mm)
Related documents
Precautions
Technical notes
- Confirmation
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