Reverse Electrode Coaxial Ge Detectors (REGe)
Features
- Spectroscopy from 3 keV up to >10 MeV
- Ultra-thin ion implanted contacts
- Radiation damage resitiant
- Excellent timing resolution
- High energy rate capability
- Diode FET protection
- Warm-up/HV shutdown
- High rate indicator
Description
The reverse-electrode detector (REGe) is similar in geometry to other coaxial germanium detectors with one important difference. The electrodes of the REGe are opposite from the conventional coaxial detector in that the p-type electrode, (ion-implanted boron) is on the outside, and the n-type contact (diffused lithium) is on the inside. There are two advantages to this electrode arrangement – window thickness and radiation damage resistance.
The ion-implanted outside contact is extremely thin (0.3 µm) compared to a lithium-diffused contact. This, in conjunction with a thin 0.6 mm Carbon Composite cryostat window, extends the response to below 3 keV, giving this detector a dynamic range of 2000:1. Needless to say, this dynamic range exceeds the 100:1 offered by most analysis systems so the detector is unlikely to be covering the range of 3 keV to 10 MeV at once. Beryllium and aluminum windows are also available.
It has been found that radiation damage, principally due to neutrons or charged particles, causes hole trapping in germanium. Unlike the case of the conventional coaxial detector, holes are collected by the outside electrode of the REGe detector. Since a much greater amount of the active detector volume is situated within a given distance, Δ R, of the outside contact, than of the inside contact (Volume ~ R2) it follows that, on average, holes have less distance to travel if they are attracted to the outside contact than if they are attracted to the inside contact. With less distance to travel, they are less likely to be trapped in radiation damaged material. The extent of the improved resistance to radiation damage depends on other facts, of course, but experimental evidence suggests that the REGe detector may be 10 times as resistant to damage as conventional coaxial germanium detectors.
Note to our International Customers: If you would like a quote on this product, please contact your Local Sales Office for assistance. |
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| Models | Description | |
| GR1018 | Reverse Electrode Ge detector (= >10 ref. eff.) | |
| GR1020 | Reverse Electrode Ge detector (= >10 ref. eff.) | |
| GR1518 | Reverse Electrode Ge detector (= >15 ref. eff.) | |
| GR1520 | Reverse Electrode Ge detector (= >15 ref. eff.) | |
| GR2018 | Reverse Electrode Ge detector (= >20 ref. eff.) | |
| GR2020 | Reverse Electrode Ge detector (= >20 ref. eff.) | |
| GR2519 | Reverse Electrode Ge detector (= >25 ref. eff.) | |
| GR2521 | Reverse Electrode Ge detector (= >25 ref. eff.) | |
| GR3019 | Reverse Electrode Ge detector (= >30 ref. eff.) | |
| GR3021 | Reverse Electrode Ge detector (= >30 ref. eff.) | |
| GR3519 | Reverse Electrode Ge detector (= >35 ref. eff.) | |
| GR3521 | Reverse Electrode Ge detector (= >35 ref. eff.) | |
| GR4020 | Reverse Electrode Ge detector (= >40 ref. eff.) | |
| GR4022 | Reverse Electrode Ge detector (= >40 ref. eff.) | |
| GR4520 | Reverse Electrode Ge detector (= >45 ref. eff.) | |
| GR4522 | Reverse Electrode Ge detector (= >45 ref. eff.) | |
| GR5021 | Reverse Electrode Ge detector (= >50 ref. eff.) | |
| GR5023 | Reverse Electrode Ge detector (= >50 ref. eff.) | |
| GR5522 | Reverse Electrode Ge detector (= >55 ref. eff.) | |
| GR5524 | Reverse Electrode Ge detector (= >55 ref. eff.) | |
| GR6022 | Reverse Electrode Ge detector (= >60 ref. eff.) | |
| GR6024 | Reverse Electrode Ge detector (= >60 ref. eff.) | |
| GR6523 | Reverse Electrode Ge detector (= >65 ref. eff.) | |
| GR6525 | Reverse Electrode Ge detector (= >65 ref. eff.) | |
| GR7023 | Reverse Electrode Ge detector (= >70 ref. eff.) | |
| GR7025 | Reverse Electrode Ge detector (= >70 ref. eff.) | |
| GR8023 | Reverse Electrode Ge detector (= >80 ref. eff.) | |
| GR8025 | Reverse Electrode Ge detector (= >80 ref. eff.) | |
| GR9023 | Reverse Electrode Ge detector (= >90 ref. eff.) | |
| GR9025 | Reverse Electrode Ge detector (= >90 ref. eff.) | |
| GR10024 | Reverse Electrode Ge detector (= >100 ref. eff.) | |
| GR10026 | Reverse Electrode Ge detector (= >100 ref. eff.) | |
QUESTIONS? 
In the United States
(800) 243-3955
Outside United States:
(203) 238-2351
