RFQ - Low Background Shield for an HPGe Gamma Ray Spectrometer

The National Physical Laboratory (NPL) is the UK's National Measurement Institute and is a world-leading centre of excellence in developing and applying the most accurate measurement standards, science, and technology available. The Nuclear Metrology group maintains a small suite of high-purity germanium gamma-ray spectrometers for the measurement of environmental level radioactive samples. The lead shields used to house these detectors at NPL are constructed of low-background lead that is over 500 years old b...