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
Mar 2026
Jan 2026
Latest Journal Issues
Nuclear Science and Engineering
April 2026
Nuclear Technology
February 2026
Fusion Science and Technology
Latest News
60 Years of U: Perspectives on resources, demand, and the evolving role of nuclear energy
Recent years have seen growing global interest in nuclear energy and rising confidence in the sector. For the first time since the early 2000s, there is renewed optimism about the industry’s future. This change is driven by several major factors: geopolitical developments that highlight the need for secure energy supplies, a stronger focus on resilient energy systems, national commitments to decarbonization, and rising demand for clean and reliable electricity.
V. Spiegel, Jr., A. C. B. Richardson
Nuclear Science and Engineering | Volume 10 | Number 1 | May 1961 | Pages 11-15
Technical Paper | doi.org/10.13182/NSE61-A25923
Articles are hosted by Taylor and Francis Online.
The neutron age to the 1.44-ev resonance in indium has been determined from activation measurements for a D(d, n)He3 neutron source in 99.8% heavy water. Appropriately averaged and corrected indium foil activities yield the value 119.1 ± 1.5 cm2 for the age in an infinite medium. Independent theoretical calculations for exactly this experimental arrangement by Cooper (1), Goldstein and Certaine (2), and for a comparable case by Sullivan (3) all yield values in agreement with this experimental result. It appears, therefore, that there is at present no discrepancy between theory and experiment for the age of 2–3 Mev neutrons in heavy water.
