Standard Electrode Coaxial Ge Detectors (SEGe)
Features
- Energy range from 40 keV to >10 MeV
- 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 µm 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 40 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.
Note to our International Customers: If you would like a quote on this product, please contact your Local Sales Office for assistance. |
||
| Models | Description | |
| GC0518 | Standard Electrode Ge detector (= >5 ref. eff.) | |
| GC1018 | Standard Electrode Ge detector (= >10 ref. eff.) | |
| GC1020 | Standard Electrode Ge detector (= >10 ref. eff.) | |
| GC1518 | Standard Electrode Ge detector (= >15 ref. eff.) | |
| GC1520 | Standard Electrode Ge detector (= >15 ref. eff.) | |
| GC2018 | Standard Electrode Ge detector (= >20 ref. eff.) | |
| GC2020 | Standard Electrode Ge detector (= >20 ref. eff.) | |
| GC2518 | Standard Electrode Ge detector (= >25 ref. eff.) | |
| GC2520 | Standard Electrode Ge detector (= >25 ref. eff.) | |
| GC3018 | Standard Electrode Ge detector (= >30 ref. eff.) | |
| GC3020 | Standard Electrode Ge detector (= >30 ref. eff.) | |
| GC3518 | Standard Electrode Ge detector (= >35 ref. eff.) | |
| GC3520 | Standard Electrode Ge detector (= >35 ref. eff.) | |
| GC4018 | Standard Electrode Ge detector (= >40 ref. eff.) | |
| GC4020 | Standard Electrode Ge detector (= >40 ref. eff.) | |
| GC4518 | Standard Electrode Ge detector (= >45 ref. eff.) | |
| GC4520 | Standard Electrode Ge detector (= >45 ref. eff.) | |
| GC5019 | Standard Electrode Ge detector (= >50 ref. eff.) | |
| GC5021 | Standard Electrode Ge detector (= >50 ref. eff.) | |
| GC5519 | Standard Electrode Ge detector (= >55 ref. eff.) | |
| GC5521 | Standard Electrode Ge detector (= >55 ref. eff.) | |
| GC6020 | Standard Electrode Ge detector (= >60 ref. eff.) | |
| GC6022 | Standard Electrode Ge detector (= >60 ref. eff.) | |
| GC6520 | Standard Electrode Ge detector (= >65 ref. eff.) | |
| GC6522 | Standard Electrode Ge detector (= >65 ref. eff.) | |
| GC7020 | Standard Electrode Ge detector (= >70 ref. eff.) | |
| GC7022 | Standard Electrode Ge detector (= >70 ref. eff.) | |
| GC8021 | Standard Electrode Ge detector (= >80 ref. eff.) | |
| GC8023 | Standard Electrode Ge detector (= >80 ref. eff.) | |
| GC9021 | Standard Electrode Ge detector (= >90 ref. eff.) | |
| GC9023 | Standard Electrode Ge detector (= >90 ref. eff.) | |
| GC10021 | Standard Electrode Ge detector (= >100 ref. eff.) | |
| GC10023 | Standard Electrode Ge detector (= >100 ref. eff.) | |
| GC11021 | Standard Electrode Ge detector (= >110 ref. eff.) | |
| GC11023 | Standard Electrode Ge detector (= >110 ref. eff.) | |
| GC12021 | Standard Electrode Ge detector (= >120 ref. eff.) | |
| GC12023 | Standard Electrode Ge detector (= >120 ref. eff.) | |
| GC13021 | Standard Electrode Ge detector (= >130 ref. eff.) | |
| GC13023 | Standard Electrode Ge detector (= >130 ref. eff.) | |
| GC14022 | Standard Electrode Ge detector (= >140 ref. eff.) | |
| GC14024 | Standard Electrode Ge detector (= >140 ref. eff.) | |
| GC15022 | Standard Electrode Ge detector (= >150 ref. eff.) | |
| GC15024 | Standard Electrode Ge detector (= >150 ref. eff.) | |
QUESTIONS? 
In the United States
(800) 243-3955
Outside United States:
(203) 238-2351
