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
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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
Aug 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
Ho Nieh nominated to the NRC
Nieh
President Trump recently nominated Ho Nieh for the role of commissioner in the Nuclear Regulatory Commission through the remainder of a term that will expire June 30, 2029.
Nieh has been the vice president of regulatory affairs at Southern Nuclear since 2021, though he is currently working as a loaned executive at the Institute of Nuclear Power Operations, where he has been for more than a year.
Nieh’s experience: Nieh started his career at the Knolls Atomic Power Laboratory, where he worked primarily as a nuclear plant engineer and contributed as a civilian instructor in the U.S. Navy’s Nuclear Power Program.
From there, he joined the NRC in 1997 as a project engineer. In more than 19 years of service at the organization, he served in a variety of key leadership roles, including division director of Reactor Projects, division director of Inspection and Regional Support, and director of the Office of Nuclear Reactor Regulation.
W. Mannhart, W. G. Alberts
Nuclear Science and Engineering | Volume 69 | Number 2 | February 1979 | Pages 333-338
Technical Note | doi.org/10.13182/NSE79-A20622
Articles are hosted by Taylor and Francis Online.
The measuring procedure for the determination of neutron activation cross sections averaged over the neutron spectrum of 252Cf is described. Measurements were done in a low-scattering irradiation facility that provides a nearly undisturbed field of neutrons emitted with the spontaneous fission of 252Cf The following neutron reactions were in vestigated: 113In(n,n′), 115In(n,γ), 115In(n,n′), 197Au(n,γ), and 197Au(n,2n). The resulting average cross sections were compared with those of other experiments. In addition, calculations of average cross sections were performed. The results of the present and of our earlier measurements were summarized and compared with calculated average cross sections obtained by folding the spectral distribution of 252Cf neutrons with different σ(E) data (ENDF/B-IV, ENDF/B-V, and recent experiments).
