Safeguards and environmental measurements using Compton suppressed Ge detectors

The Compton suppressed Ge detector has been a powerful tool in basic nuclear science research. The suppression mechanism helps one 'see' low-intensity peaks that are otherwise hidden under the Compton continuum. It also improves statistical uncertainty because of lower background under the gamma-ray peak. We are using this method to significantly advance the currently available safeguards and environmental sample analysis techniques that use gamma-ray measurements. Our preliminary studies using a not completely optimized system show both positive and negative results in using the Compton suppression. More careful setup (in both electronics and geometry) and study (using broad range of assays) are needed. (author)