Lead shields prevent high background counts with gamma detectors due to external sources, thus reducing counting times and improving the lower limit of detection. An active shield option using cosmic veto technology is also available to minimize background further for ultra-low background detector applications.
The term "low background" is used fairly indiscriminately in describing gamma analysis systems. The one common denominator for such systems is some form of shielding, but beyond this, anything goes.
The 767 system is a full-size and full-featured lead shield for use with germanium detectors having a vertical orientation.
The Model 747 Mirion Lead Shield is intended for use with Germanium detectors.
The 777 system is an ultra low-background lead shield for germanium gamma-ray detectors.
The Model 737 Lead Shield is designed to accommodate U-style™ cryostats which have a vertical detector chamber located at the end of a horizontal arm extending from the side of the Dewar.
CosmicGuard device is a simple add-on to any new or existing High Purity Germanium (HPGe) counting system that includes a Lynx® Digital Signal Analyzer and Genie™ 2000 or Apex-Gamma™ spectroscopy software.