Auto-HPGe, an autosampler for gamma-ray spectroscopy using high-purity germanium (HPGe) detectors and heavy shields

thingiverse

Radionuclide measurements have proven to be crucial for identifying processes linked to pressing environmental concerns as well as reconstructing historical events associated with natural and anthropogenic activities. The detection of radionuclide tracers in environmental and geological samples offers unique and essential insights into specific sources and sinks. Although it is beneficial for measuring natural and anthropogenic radioisotopes, high-purity germanium (HPGe) gamma ray detectors are rarely automated due to the heavy shielding required to operate this equipment. As a result, the commonly available autosamplers for this type of analysis can be very expensive, exceeding AU$400,000. Here we present auto-HPGe, an innovative autosampler for gamma ray detection in heavy shields that costs approximately AU$1100 to build. Auto-HPGe has the potential to make HPGe analysis more appealing to scientists, particularly when the equipment is located in remote areas or when the ability to change samples at odd hours is limited. All necessary files and instructions can be obtained from https://www.sciencedirect.com/science/article/pii/S246806721830049X.