Gamma detectors

Neutron and Gamma Detectors for the nuclear industry

In Gamma detectors,gamma radiation produces electrons by interacting with the cathode material and the filling gas. These electrons ionize the gas and the charge carriers are collected by the electrodes. The resulting anode pulse is detected by a load circuit. The primary electrons are created by several interaction mechanisms:

  • Photoelectric effect
  • Compton scattering
  • Pair productio

Mechanism efficiency depends on gamma quanta energy, cathode material and thickness, filling gas type and pressure. Detector sensitivity is therefore very dependent on the detector design, but is always energy-dependent. Due to the dominance of the photoelectric effect, the maximum sensitivity occurs at about 80 keV. At high gamma energies (> 500 keV), the sensitivity can fall to one hundredth of the maximum for the same mechanical design.

A flatter response can be obtained by using an external metal filter and by the choice of filling gas. Photonis is willing to assist in designing such filters.

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KINTEX Exhibition Center Ⅱ.


FROM Sep 25th 2024 TO Jun 28th 2024


Visit Exosens at DX KOREA 2024 from September 25 to 28 in KINTEX Exhibition Center Ⅱ, Korea

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