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.
Explore membership for yourself or for your organization.
Conference Spotlight
2026 Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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!
Latest Magazine Issues
Dec 2025
Jul 2025
Latest Journal Issues
Nuclear Science and Engineering
December 2025
Nuclear Technology
Fusion Science and Technology
November 2025
Latest News
Deep Fission to break ground this week
With about seven months left in the race to bring DOE-authorized test reactors on line by July 4, 2026, via the Reactor Pilot Program, Deep Fission has announced that it will break ground on its associated project on December 9 in Parsons, Kansas. It’s one of many companies in the program that has made significant headway in recent months.
S. Guru Prasad, K. Parthasaradhi, W. D. Bloomer
Nuclear Science and Engineering | Volume 126 | Number 2 | June 1997 | Pages 224-228
Technical Paper | doi.org/10.13182/NSE97-A24475
Articles are hosted by Taylor and Francis Online.
Effective atomic numbers are derived for the low-Z compounds polyethylene, polycarbonate, Teflon, Mylar, polystyrene, and polyvinyl chloride for total photon interaction in the 10- to 20000-keV energy region. The number generally decreases and then increases with increasing energy. This variation is based on the effective atomic numbers for photoelectric, incoherent scattering, and pair production partial photon interaction processes.