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 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
Latest Magazine Issues
May 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
June 2026
Nuclear Technology
Fusion Science and Technology
Latest News
NRC proposes changes to its rules on nuclear materials
In response to Executive Order 14300, “Ordering the Reform of the Nuclear Regulatory Commission,” the NRC is proposing sweeping changes to its rules governing the use of nuclear materials that are widely used in industry, medicine, and research. The changes would amend NRC regulations for the licensing of nuclear byproduct material, some source material, and some special nuclear material.
As published in the May 18 Federal Register, the NRC is seeking public comment on this proposed rule and draft interim guidance until July 2.
J. Sáfár, L. Lakosi
Nuclear Science and Engineering | Volume 115 | Number 4 | December 1993 | Pages 297-299
Technical Paper | doi.org/10.13182/NSE93-A24059
Articles are hosted by Taylor and Francis Online.
The cross section of the 93Nb(γ, γ′)93mNb reaction is calculated in the 5- to 30-MeV gamma-energy region in the framework of a gamma-ray cascade model with open nucleon emission channels and including pre-equilibrium contribution. The resulting cross-section curve shows one pronounced peak at the neutron separation energy with an integral of 3.1 mb-MeV up to 12 MeV. Taking into consideration the pre-equilibrium gamma emission, a negligible contribution to the calculated excitation curve results at ∼18 MeV. The influence of gamma background on the response of 93Nb as a neutron fluence monitor is estimated for two practical cases.
