Coaxial Germanium Detectors

---

View full specifications (PDF)

Features

• Wide range of efficiencies
• High resolution – good peak shape
• Excellent timing resolution
• High energy rate capability
• Diode FET protection
• Warm-up/HV shutdown
• High rate indicator

Description

The conventional coaxial germanium detector is often referred to as Pure Ge, HPGe, Intrinsic Ge, or Hyperpure Ge. Regardless of the superlative used, the detector is basically a cylinder of germanium with an n-type contact on the outer surface, and a p-type contact on the surface of an axial well. The germanium has a net impurity level of around 10¹⁰ atoms/cc so that with moderate reverse bias, the entire volume between the electrodes is depleted, and an electric field extends across this active region. Photon interaction within this region produces charge carriers which are swept by the electric field to their collecting electrodes, where a charge sensitive preamplifier converts this charge into a voltage pulse proportional to the energy deposited in the detector.

The n and p contacts, or electrodes, are typically diffused lithium and implanted boron respectively. The outer n-type diffused lithium contact is about 0.5 mm thick. The inner contact is about 0.3 mm thick. A surface barrier may be substituted for the implanted boron with equal results.

The CANBERRA Coaxial Ge detector can be shipped and stored without cooling. However, long term stability is best preserved by keeping the detector cold. Like all germanium detectors, it must be cooled when it is used to avoid excessive thermally-generated leakage current. The non-perishable nature of this detector widens the application of Ge spectrometers to include field use of portable spectrometers.

The useful energy range of the Coaxial Ge detector is 50 keV to more than 10 MeV. The resolution and peak shapes are excellent and are available over a wide range of efficiencies. A list of available models is given in the accompanying table.

View full specifications (PDF)

---

Top of Page

Note to our International Customers: The CANBERRA Online Quoting System is only available for our US customers. If you would like a quote on this product, please contact your Local Sales Office for assistance. We apologize for the inconvenience.
Models
GC10021: Coaxial Ge 10021	Request a Quote
GC10023: Coaxial Ge 10023	Request a Quote
GC1018: Coaxial Ge 1018	Request a Quote
GC1019: Coaxial Ge 1019	Request a Quote
GC1518: Coaxial Ge 1058	Request a Quote
GC1519: Coaxial Ge 1519	Request a Quote
GC1520: Coaxial Ge 1520	Request a Quote
GC2018: Coaxial Ge 2018	Request a Quote
GC2019: Coaxial Ge 2019	Request a Quote
GC2020: Coaxial Ge 2020	Request a Quote
GC2518: Coaxial Ge 2518	Request a Quote
GC2519: Coaxial Ge 2519	Request a Quote
GC2520: Coaxial Ge 2520	Request a Quote
GC3018: Coaxial Ge 3018	Request a Quote
GC3019: Coaxial Ge 3019	Request a Quote
GC3020: Coaxial Ge 3020	Request a Quote
GC3518: Coaxial Ge 3518	Request a Quote
GC3519: Coaxial Ge 3519	Request a Quote
GC3520: Coaxial Ge 3520	Request a Quote
GC4019: Coaxial Ge 4019	Request a Quote
GC4020: Coaxial Ge 4020	Request a Quote
GC4021: Coaxial Ge 4021	Request a Quote
GC4519: Coaxial Ge 4519	Request a Quote
GC4520: Coaxial Ge 4520	Request a Quote
GC4521: Coaxial Ge 4521	Request a Quote
GC5019: Coaxial Ge 5019	Request a Quote
GC5020: Coaxial Ge 5020	Request a Quote
GC5021: Coaxial Ge 5021	Request a Quote
GC5520: Coaxial Ge 5520	Request a Quote
GC5521: Coaxial Ge 5521	Request a Quote
GC5522: Coaxial Ge 5522	Request a Quote
GC6020: Coaxial Ge 6020	Request a Quote
GC6022: Coaxial Ge 6022	Request a Quote
GC6520: Coaxial Ge 6520	Request a Quote
GC6522: Coaxial Ge 6522	Request a Quote
GC7020: Coaxial Ge 7020	Request a Quote
GC7022: Coaxial Ge 7022	Request a Quote
GC7522: Coaxial Ge 7522	Request a Quote
GC8021: Coaxial Ge 8021	Request a Quote
GC8023: Coaxial Ge 8023	Request a Quote
GC8521: Coaxial Ge 8521	Request a Quote
GC8523: Coaxial Ge 8523	Request a Quote
GC9021: Coaxial Ge 9021	Request a Quote
GC9023: Coaxial Ge 9023	Request a Quote
GC9521: Coaxial Ge 9521	Request a Quote
GC9523: Coaxial Ge 9523	Request a Quote