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Features

• Near 4π counting geometry
• Blind well for high efficiency
• Large well sizes available
• Diode FET protection
• Warm-up/HV shutdown
• High rate indicator

Description

The CANBERRA Germanium Well Detector provides maximum efficiency for small samples because the sample is virtually surrounded by active detector material. The CANBERRA Well detector is fabricated with a blind hole rather than a through hole, leaving at least 5 mm of active detector thickness at the bottom of the well. The counting geometry therefore approaches 4π.

Germanium Well Detectors are made from high-purity germanium and can therefore be shipped and stored at room temperature without harm. Unlike lithium-drifted detectors, high-purity germanium detectors may be cycled repeatedly between LN₂ and room temperature with no compromise in performance.

The cryostat end cap and well are fabricated from aluminum with a thickness of 0.5 mm in the vicinity of the well. The ion implanted or surface barrier contact on the detector element is negligibly thin compared to 0.5 mm of aluminum so these detectors have intrinsically good low energy response.

A variety of detector sizes and well diameters are available. The standard well depth is 40 mm for all detectors. Consult the accompanying table for information on standard units. Special well sizes and cryostat configurations are also available.

Consult the factory for information on the availability of larger well detectors.