N-Type HPGe Detectors

Features:

  • N-type high-purity germanium, with ion-implanted exterior surface and lithium diffusion center contact
  • Vertical dipstick cryostat
  • Standard 30-liter dewar
  • Aluminum endcap with beryllium window
  • RG-11 B/C resistive feedback preamplifier
  • 12-ft. bias, signal and power cables
  • Unlimited temperature cycling without loss of resolution

Options:

  • Portable and mechanically cooled systems
  • A large variety of cryostat configurations
  • Low-background materials, such as OFHC copper endcaps
  • Ultra-low background beryllium windows
  • Transistor reset preamplifier for high count rates (Energy count-rate product limit of  >800,000MeV/sec)
  • Low-power preamplifier
  • Ultra-low microphonic QUIET-ONE crystal mounting
  • Neutron Radiation Damage Repair Kit

PGT N-type germanium coaxial detectors are useful down to ~3 keV, since they have a standard beryllium entrance window and a thin (0.3 µm) P+ face. The NIGC extended range detectors are therefore the best choice for applications involving both X-ray and high-energy gamma-ray spectroscopy in the same sample. These detectors exhibit excellent timing characteristics and are appropriate with anti-Compton shielding. They are thus especially suitable for suppression of Compton scattering to reduce background. Fast neutrons can generate hole trapping centers, whose presence is manisfested by poor resolution at 1.33 MeV or higher. Because the main charge carriers in NIGC detectors are electrons, which are not as easily trapped as holes, these detectors are more resistant to neutron damage than are P-type detectors. This makes them ideal under conditions of high neutron flux. PGT NIGC detectors have even proven themselves in space and high-altitude applications. An optional neutron damage repair kit allows you to repair these detectors in your own lab if damage does occur

NIGC Series Detectors Product Specs

Additional Options:

The standard endcap has a 2.5-inch diameter beryllium window (0.02 inch thick) with excellent transmission for energies above 5 keV, unless otherwise specified. An all-aluminum endcap can be furnished for use in rugged environments for measurements over the energy range 20 keV to 10 MeV.

For ultra-low background applications, PGT offers oxygen-free high conductivity (OFHC) copper endcaps, ultra-low background aluminum, IF-1 beryllium entrance windows and plastic entrance windows. The NPR cryostat, with or without lead shielding, maintains the lowest level of background interference available.

View and Print with Adobe AcrobatHPGe N-Type Detectors Data Sheet