• Specifically designed to meet the demanding requirements of
isotopic ratio software codes used in Safeguards and NDA.
• Excellent resolution is maintained over a wide range of count rates,
enhancing measurement flexibility.
• Available in a full range of crystal diameters.
• Extensive range of cryostats with multi-orientation dewar options
for applications requiring portability.
• Compatible with all existing Safeguards multichannel
analyzers.
The precise measurement of isotopic ratios required in Safeguards and
non-destructive assay (NDA) applications places a severe demand on the
techniques of gamma-ray and x-ray spectroscopy. Figure 1 demonstrates
the complexity of the 90–130 keV region of a typical Pu spectrum. (The
choice of energy region(s) for analysis depends specifically on the sample
type and origin and the material matrix.
National laboratory software codes1 written to obtain highly accurate
isotopic ratios, must deal with these spectra to analyze low-energy and/or
high-energy regions in which groups of peaks are located close together.
Each code requires exceptional system resolution and stability in order to
achieve accurate unfolding of these regions.
Recent safeguards development trends have led to a growing
requirement of isotopic ratio determinations involving higher
energy gamma-rays. Such needs spring from the need to
measure attenuated samples, such as those found in waste
assay and in certain homeland security applications. Software
codes such as PC/FRAM and MGAHI2 can now determine Pu
isotopic ratios from the higher energy regions of the spectrum.
As a consequence, it is desirable to produce HPGe
detectors
that offer improved higher energy performance, while
maintaining the excellent resolution characteristics required in
such applications.
The ORTEC Safeguards series include both coaxial and planar
geometry
detectors, specifically designed to meet the demands
of the applications software used for isotopic ratio
determination, have been developed to strike an optimum
balance between low-energy resolution and high-energy
efficiency.
SGD series
detectors are compatible with ALL conventional MCA types, although optimum performance will be obtained when used
with the ORTEC Digital Signal Processing Spectrometers.
All SGD
detectors feature the following:
• Choice of fixed, portable, and custom cryostats, including the latest MOD multi-orientation dewar option.
• Robust aluminum end-cap
• Streamline preamplifier assembly
• LN2-Free option
The latest low-power resistive feedback preamplifier with "no ring" output, suitable for use with all existing types of MCA systems.
Power consumption less than 25 mA at ±12 and ±24 V.
High-Performance Germanium Coaxial Detectors
for Safeguards and Non-Destructive Assay
Product Configuration Guide
ORTEC®
Fig. 1. The 90 to 130 keV region of a typical plutonium spectrum.
