The GAMMA-X is a unique combination of a low power Scintillation Probe and the world's smallest MCA, the MCA8000A.

The scintillation probe features a complete design of Scintillator, PM Tube, High Voltage supply, Preamplifier and Amplifier. A hybrid preamplifier and spectroscopic amplifier processes signals from the photomultiplier tube. Power and signal connections to the probe are provided through a single cable from the MCA8000A. A high voltage monitor and control is provided at the back of the probe via a twenty-turn potentiometer. Energy resolution with the standard 30 x 30 mm or 76 x 76 mm NaI(TI) crystal is <7.5% FWHM at 662 keV and <14% FWHM for the 59.5 keV.

Control and display of the MCA8000A can be provided by a palmtop, laptop or desktop computer. The MCA8000A features up to 16k channels successive approximation ADC with less than 5 µs conversion time and sliding scale linearization. Windows and DOS software are included. See MCA8000A specifications.

Features

• The MCA8000A provides power to the probe from two AA batterries
• Scintillator Probe Includes:
  
  • PM Tube
  • High Voltage Supply
  • Preamplifier and Amplifier
• Crystal Sizes from 30 x 30 mm up to 152 x 76 mm
• Choice of Crystals: NaI(TI), CsI(TI), BGO, etc.
• Rugged Design

Weight

• MCA8000A: 300g
• 30B30 Probe: 450g
• 76B76 Probe: 2kg

Typical Gamma-X Spectra with 76B76 NaI(Tl) Detector

NaI Efficiency

Revised February 7, 2001