Germanium detectors are semiconductor diodes having a p-i-n structure in which the intrinsic (I) region is sensitive to ionizing radiation, particularly x rays and gamma rays.
When photons interact with the material within the depleted volume of a detector, charge carriers (holes and electrons) are produced and are swept by the electric field to the P and N electrodes. This charge, which is in proportion to the energy deposited in the detector by the incoming photon, is converted into a voltage pulse by an integral charge sensitive preamplifier.
Because germanium has relatively low band gap, these detectors must be cooled with Liquid nitrogen (temperature of 77 °K)
Detection, accumulation and processing of gamma spectra in field and industry conditions where small dimensions and weight of spectrometer are important
The Portable HPGe Gamma-ray Detectors complete set is composed by the following components:
- HPGe coaxial detector
- Preamplifier with cooled input stage
- Dewar vessel
- Cable set
In addition to standard supply, the following accessories are available upon request:
- Hexagon Multichannel Analyzer
- Analytical Software packages:
- quantitative and qualitative analysis
- Gamma spectra modeling and efficiency registration calculation for complex geometry objects
- extended radionuclide library
- Hand-cart for Multichannel Analyzer, battery, transformer, etc.
- Additional batteries
- Transport case
- Liquid nitrogen storage and filling system
- Liquid nitrogen sensor and monitor
- Cable set extension