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Germanium Detector Stocklist

IGLET-X™ Germanium (HPGe) Detector for
Very-Low-Energy X Rays

  • Ideal for PIXE, XAFS, and XRF
  • Wide acceptance angle: up to 200 mm2 active area
  • High efficiency x-ray spectrometry: <0.5 keV to >60 keV
  • Excellent energy resolution at low and high count rates
  • High peak to background ratios
  • Choice of cryostats
  • State-of-the-art reset feedback preamplifier
  • Cyclable between room temperature and LN2 operating temperature
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Figure 15. Pulse Height Distribution of Oxygen Ka Line
(109 eV FWHM @ 525 eV).
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Figure 16. Pulse Height Distribution of Carbon Ka Line
(118 eV FWHM @ 277 eV).
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Figure 17. IGLET-X Full Energy Detection Efficiency
in Percent vs. X-Ray Energy.
The IGLET-X is a unique germanium detector especially designed for x-ray spectrometry in PIXE, XAFS, and XRF applications. The large active area combined with the high density of germanium (vs. silicon) yields a high efficiency detector for x-ray energies from <500 eV (in a windowless cryostat) to >60 keV.

IGLET-X delivers high peak-to-tail ratios and Gaussian peak shapes, even at energies below 500 eV (in a windowless cryostat). Excellent energy resolution may be achieved even at count rates of 100,000 cps and above.

With a resolution of 135 eV for a 6-mm-diameter, 6-mm-deep detector and 145 eV for a 11-mm-diameter, 10-mm-deep detector, the IGLET-X detector provides substantially better resolution than is possible with conventional planar or modified planar detector geometries. With an IGLET-X detector in a windowless system, resolution of less than 110 eV, with perfectly Gaussian peak shape, has been reported for the oxygen Ka1 line (at 525 eV). (Fig. 15)6 IGLET-X detectors are available in a wide choice of cryostats.

Entrance Window

Through even ultra-thin beryllium windows, there is little transmission of <1-keV photons. There is a practical, reliable method of achieving excellent resolution at energies as low as the carbon Ka line at 277 eV (Fig. 16)6. The answer is a windowless system, for which the experimenter must control the cleanliness of the vacuum system.

At energies below 3 keV the Full Energy Detection Efficiency of SLP and IGLET-X detectors is dominated by x-ray absorption in the endcap window. Figure 17 shows the results obtained with Be windows of different thickness.

Individual Detector or Multiple-Detector Arrays

The IGLET-X is available either as an individual detector in an individual cryostat or in multiple-detector arrays.

 

 

Ordering Information

IGLET-X detectors can be supplied individually in ORTEC "streamline," but not PopTop, cryostats. The choices are vertical dipstick (SV), horizontal dipstick (SH), side-looking "bucket" (SL), down-looking "bucket" (SD), and Gamma Gage (GG). There are several choices of liquid-nitrogen dewar size. Dimensional information for the cryostats and dewars.

IGLET-X HPGe Detector Element for Very-Low-Energy X Rays
 Available in Non-PopTop Standard Cryostat Only.
To order a complete IGLET-X Detector, you must order a detector element, a cryostat, and a dewar (or cryostat/dewar assembly).
 
Model Active
Diameter
(mm)		 Active
Depth
(mm)		 Warranted Resolution Be
Window
Thickness (µm)
@5.9 keV, 10 µs
1000 cps		 @5.9 keV, 0.5 µs
100,000 cps
IGLET-X-06135 6 6 135 eV 250 eV 13
IGLET-X-11145 11 10 145 eV 270 eV 25
IGLET-X-16160 16 10 160 eV 280 eV 50

5Dr. R.D. Vis, "On the Use of a High-Purity Ge-Detector for PIXE Spectrometry on Geological Materials," (1995)

6A. Smith, R. Farrow, "A Soft X-Ray Solid-State Detector for Beamline 3.4 Part 2: Detector Characterization for Photon Energies Below 1 keV," (1994).