ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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August 2024
Latest News
New laws offer nuclear industry incentives for existing power plant uprates
This year, the U.S. nuclear industry received a much-needed economic boost that could help preserve operating nuclear power plants and incentivize upgrades that extend their lifespan and power output.
Signed into law in 2022, the Inflation Reduction Act offers production tax credits (PTCs) for existing nuclear power plants and either PTCs or investment tax credits (ITCs) for new carbon-free generation. These credits could make power uprates—increasing the maximum power level at which a commercial plant may operate—a much more appealing option for utilities.
Thomas R. Crites
Nuclear Science and Engineering | Volume 49 | Number 1 | September 1972 | Pages 103-106
Technical Note | doi.org/10.13182/NSE72-A22532
Articles are hosted by Taylor and Francis Online.
The backscatter of normally incident bremsstrahlung spectra photons from semi-infinite materials was investigated experimentally. The bremsstrahlung sources were broad-beam radiation from a 2.0-MeV radiographic Van de Graaff and high intensity flash x-ray devices of 3.5-, 7.0-,and 10.5-MeV peak energy. The scattering media were concrete, iron, and lead. Four back scattering angles (120, 130, 140, and 150 deg) were studied. The scattered radiation was measured by means of thermoluminescent dosimeters (LiF) located in collimated shields. The experiments were designed for shielding studies and the results are presented in a form primarily for use in health protection shielding calculations.