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
Mathematics & Computation
Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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
Mar 2025
Jul 2024
Latest Journal Issues
Nuclear Science and Engineering
March 2025
Nuclear Technology
Fusion Science and Technology
February 2025
Latest News
ANS 2025 election is open
The American Nuclear Society election is now open. Members can vote for the Society’s next vice president/president-elect and treasurer as well as six board members (four U.S. directors, one non-U.S. director, and one student director). Completed ballots must be submitted by 1:00 p.m. (EDT) on Tuesday, April 15, 2025.
T. Shimooke
Nuclear Science and Engineering | Volume 45 | Number 2 | August 1971 | Pages 117-125
Technical Paper | doi.org/10.13182/NSE71-A20879
Articles are hosted by Taylor and Francis Online.
A theoretical study is made of the reflection of neutrons by a multilayered conical tube which extends the concept of reflection by a single-layer tube. Such a device is useful for producing an intense neutron beam. Two types of this tube are discussed: One produces a high quality beam of greater intensity than obtainable with a conventional collimator. The study shows that the intensity of the thermal neutron beam is 8 to 30 times as strong as that by simple collimation. The other type is for neutron spot-irradiation and is illustrated by establishing a beam of 6100 n/ (cm2 sec) at a focal point from a source flux of 106 n/ (cm2 sec).
