SiPM NaI:Tl detector N24A
Key features
SUPERIOR SOLUTION TO PMT-BASED
Low power consumption suitable for battery-powered operations. Low payload. Insensitivity to magnetic fields
PLUG&DETECT SOLUTION
Preamplifier, photodetector and photodetector power supply is integrated
COMPACT DESIGN
Smaller, light weight in comparison to PMT detectors
| Dimensions | ø 78 mm x 116 mm |
| Scintillator size | 2 x 2 inch |
| Energy range | 15 - 3000 KeV |
| Energy resolution | ~7,5% at 137Cs |
| Noise | < 8 keV |
| Operating temperature | 0 - 50 °C |
| Power supply | Coax 5.5 mm / 2.1 mm +5 V / 250 mA max |
| Signal connector | SMA (accessorial SMA / BNC adapter) AC coupled, 50 Ohm terminated |
| Signal output | analog, typically 200 mV / 662 keV (137Cs) 3 μs typ. Time-Over-Treshold Gain selectable (low/high) |
APPLICATIONS
- field gamma spectroscopy operations
- aerial radiation monitoring including drones
- geology – natural radioisotopes in rock formations
- exhaust monitoring in nuclear power plants, e.g. sorbents with 131I
- waste monitoring of radioactive contamination (e.g. 60Co in iron)
- nuclear medicine
- personal dosimetry devices
Technical parameters
Detection efficiency
Detection efficiency of N24A SiPM 2“x2“ NaI:Tl unit evaluated for point-like radioactive source placed 60 mm from its face. Efficiency is evaluated as count-rate in the spectral peak of specified energy (continuum of Compton scattering is not included).
Simpliefied schematics of the N24A SiPM module:
Comparison to PMT
Spectrum 137Cs measured with 2”x2” NaI:Tl. Comparison of N24A SiPM readout and PMT 7266KSB:
Pulse-height spectrum of natural uranium and decay chain. Data measured with N24A SiPM unit (yellow) compared with data of the same scintillator with 7266KSB PMT (blue):
