Scintillation Detector Counting System  NaI(Tl)

Required Equipment

  • NaI (Tl) Detector
  • Preamplifier Model 3001
  • Bin Power Supply Model 8010
  • High Voltage Power Supply Model 8100
  • Amplifier Model 3600
  • Timing Single Channel Analyzer(TSCA)-2575
  • Counter-Timer 20 Ch -2655
  • BNC and SHV Cables
  • Gamma Emitting Source

All products are provided by Iman Gostar Raman Kish company


Instruments Used In This System 

1. NaI(Tl) Detector

NaI(Tl) detector is available in various sizes (usually “3 ×” 3 detector)


2. Preamplifier Model 3001

The IAP 3001 scintillation preamplifier is an all-transistor preamplifier designed for use with photomultiplier tubes. It is non inverting preamplifier with no provisions for pulse shaping excepts the variation of fall time. A diode network prevents destruction of the input transistor if a sudden positive or negative high voltage is applied to the input.


Rise time: < 60 ns

Fall time: fall time constant is designed for 50 μs , assuming a signal source impedance of MΩ.

  • Internal nonlinearity: ≤ 0.02%
  •  Power required: +24 Vdc, 17mA; -24Vdc, 17mA; supplied from any IAP  transistor main amplifier or an IAP preamplifier power supply through 10-ft captive cable.
  • Input: BNC connector; isolated for 1000 V; positive or negative polarity, 1 MΩ impedance shunted by 45 pF plus the capacity selected by jumper S1 (0,100, 200, 500, or 1000 pF).
  • Test pulse: BNC connector; accepts a pulse generator output with fast rise and slow decay to check operation of the electronics; input impedance


3. BIN Power Supply Model 8000 

The 8010 power supply is a 19 inch rack with a power supply of 160 watts, and all of its connectors have the standard voltage of a NIM bin.


  • Input: 220 or 115 Vac
  • Output impedance: < 0.3 Ω at any frequency up to 100 KHZ for the dc output
  • Temperature coefficient: < 0.02%/°C, 0 to 60 °C
  • Output ripple: < 3 mV
  • Voltage adjustment: ±2% minimum range


 4. High Voltage Power Supply Model 8100

The IAP 8100 high voltage power supply is used for biasing various detectors.


  • Output polarity: Positive or negative
  • Output voltage: 0 to 3 KV
  • Output current: 0- 10 mA
  • Output ripple: < 10 mV
  • Power: 220 Vac


5. Spectroscopy Amplifier Model 3600

The 3600 spectroscopy amplifier used in nuclear spectroscopy amplifyies and shapes the signals coming from the preamplifier.


  • Input: accepts positive or negative pulses from an associated preamplifier.
  • Input impedance: ≈ 1 kΩ
  • Connector: BNC
  • Output: Semi-Gaussian shaped pulses, unipolar and bipolar
  • Output: ± 5 mV
  • Output impedance: ≈ 93 ohms
  • Gain factor: 0.3 -3000


6. Timing Single Channel Analyzer (TSCA)

The TSCA device is used as a single-channel analyzer (SCA) or a discriminator. Its main output is a fast negative signal and a slow positive pulse. Two separate outputs are considered for low and high level analyzers in this device.


  • Dynamic range: 1-200
  • Pulse pair resolving time: minimum pulse-pair resolving time for negative and positive output is 200 ns.
  • Temperature instability: less than ± 0.01 %/ ° C
  • Discriminator nonlinear: less than ± 0.25%
  • Delay temperature instability: less than ± 0.03 %/°C
  • Delay nonlinear: less than ±2 %


7. Counter-Timer 20 Ch -2655

Counter-Timer is a device that counts and stores the input pulses and sends them to a computer for further analysis.


8. Counter Timer Software Model 2655

Counter timer software model 2655 is designed to use and communicate between the counter and the computer.


9. Cables

  • SHV and BNC


10. Gamma Emitting Source

It is possible to supply a variety of laboratory source for research applications through Iman Gostar Raman Kish company.


Long Term Warranty And After Sales Service

The warranty service includes the repair or service of the instrument and the free provision of services for replacing parts and repair wages for one year, but the warranty does not apply on the following cases:

  • Transport damages, electrical fluctuations, fire or heat, contact or penetration of water and corrosive chemicals, intense dust, lightning, natural disasters.
  • Instruments manipulated or repaired by persons other than the company’s representatives.
  • Any kind of manipulation or damage on installed holograms on the instrument.
  • Any displacement after installation without informing the company.
  • The warranty does not cover consumables.
  • After sales service is for 10 years with payment.

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