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TETRAD-20 HPGe-detektor

Bild: ORTEC

ORTEC (AMETEK)

TETRAD-20 HPGe-detektor

HPGe gamma detector

N-type clover detector with four HPGe crystals for nuclear physics measurements that need high efficiency within a limited geometry.

Energy range
20 keV–10 MeV2
Relative efficiency
TETRAD-20: 20% per detector element1
Energy resolution at 122 keV
TETRAD-20: ≤1.30 keV FWHM per element1
Datasheet

Download product sheet (PDF)All values with references – for tender documents

Specifications checked against the manufacturer’s documents on 2026-10-16

Manufacturer’s product page

Overview

Key features

  • Four detector elements in a compact clover geometry.
  • Four preamplifiers with independent bias control.
  • Designed for measurements from approximately 20 keV to 10 MeV.

Specifications

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

Detector

Detector typeN-type coaxial HPGe, clover geometry1
Detector elements42

Performance

Relative efficiencyTETRAD-20: 20% per detector element1
Energy resolution at 122 keVTETRAD-20: ≤1.30 keV FWHM per element1
Energy resolution at 1.33 MeVTETRAD-20: ≤2.25 keV FWHM per element1

Measuring range

Energy range20 keV–10 MeV2

Electronics & signal

Preamplifier4, with independent bias control2

Cooling

CoolingLN₂; TETRAD-20 dewar minimum 5 litres1
LN₂ holding timeTETRAD-20: approximately 12 hours1

Mechanical

EndcapAluminium1

The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.

Documents

PDFTETRAD-20 – Maximum Absolute Efficiency in a Limited Geometrical Space for a Wide Range of EnergiesDatasheet · ORTEC

Sources

The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.

  1. 1
    TETRAD-20 – Maximum Absolute Efficiency in a Limited Geometrical Space for a Wide Range of Energies
    Publisher: ORTEC (AMETEK)Brochure pp. 2–3; p. 4, Specifications; p. 3 Checked 2026-10-16
  2. 2
    TETRAD N-type High Purity Germanium (HPGe) Detector for Nuclear Physics Applications
    Publisher: ORTEC (AMETEK)Product page Product page intro; Feature list Checked 2026-10-16
GEM HPGe-detektorer
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HPGe detectors for gamma spectroscopy

Energy range
Approximately 40 keV and above
Relative efficiency
10–150% across the model series; higher on request
Energy resolution at 122 keV
FWHM maximum limits 0.80–1.30 keV for GEM10–GEM150; model-dependent
17 models
Safeguards planar HPGe-detektor
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Safeguards planar HPGe-detektor

Planar HPGe gamma detector

Detector type
Planar HPGe
Energy resolution at 122 keV
Warranted FWHM for SGD-16550P4: 550 eV at 1 kcps, 6 μs; 615 eV at 50 kcps, 1 μs
7 models
Safeguards koaxial HPGe-detektor
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Safeguards koaxial HPGe-detektor

HPGe gamma detector

Detector type
HPGe, coaxial or semi-planar by SGD-GEM model
Energy resolution at 122 keV
FWHM maximum limits 0.61–0.80 keV at 1 kcps and optimal shaping; model-dependent
4 models
GLP plana HPGe-detektorer
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GLP plana HPGe-detektorer

HPGe gamma detector

Energy range
Approximately 5–300 keV
Active area
Nominally 80–1,000 mm², model-dependent
Energy resolution at 122 keV
FWHM maximum limits 0.51–0.63 keV for the tabulated models
8 models
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Questions about this product?

We help you choose the right configuration, detector and accessories for your measurement task.

Send inquiryContact
Oscar ÅgerstamFounder & CEO
+46 (0)793-04 51 91 oscar@ndec.se +46 (0)793-12 32 48 (customer service)