page_title: Nuclear densitometry
hierarchical_section_title: Nuclear densitometry
caption_attribution_description: U.S. Air Force Master Sgt. Michael Carlson and Staff Sgt. Brian Richardson, engineering assistants with the 823rd Rapid Engineer Deployable Heavy Operational Repair Squadron, use a density gauge to ensure proper compaction for the foundation for a school during New Horizons 2013 in Orange Walk, Belize, March 22, 2013. New Horizons is a U.S. Southern Command-sponsored annual series of joint humanitarian assistance exercises deploying U.S. military engineers, veterinarians, medics and other professions to Central and South American nations for training, construction projects and to provide humanitarian and medical services. (DoD photo by Capt. Holly Hess, U.S. Air Force/Released)
context_page_description: Nuclear densitometry is a technique used in civil construction and the petroleum industry, as well as for mining and archaeology purposes, to measure the density and inner structure of the test material. The processes uses a nuclear density gauge, which consists of a radiation source that emits particles and a sensor that counts the received particles that are either reflected by the test material or pass through it. By calculating the percentage of particles that return to the sensor, the gauge can be calibrated to measure the density.
  In geotechnical engineering, a nuclear densometer or soil density gauge is a field instrument used to determine the density of a compacted material. The device uses the interaction of gamma radiation with matter to measure density, either through direct transmission or the "backscatter" method. The device determines the density of material by counting the number of photons emitted by a radioactive source that are read by the detector tubes in the gauge base. A 60-second time interval is typically used for the counting period.
context_section_description: Nuclear densitometry is a technique used in civil construction and the petroleum industry, as well as for mining and archaeology purposes, to measure the density and inner structure of the test material. The processes uses a nuclear density gauge, which consists of a radiation source that emits particles and a sensor that counts the received particles that are either reflected by the test material or pass through it. By calculating the percentage of particles that return to the sensor, the gauge can be calibrated to measure the density.
  In geotechnical engineering, a nuclear densometer or soil density gauge is a field instrument used  to determine the density of a compacted material. The device uses the interaction of gamma radiation with matter to measure density, either through direct transmission or the "backscatter" method.  The device determines the density of material by counting the number of photons emitted by a radioactive source (cesium-137) that are read by the detector tubes in the gauge base.  A 60-second time interval is typically used for the counting period.
caption: A density gauge being used to ensure proper compaction for the foundation of a school construction project.
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