Saturday 01 February 2025
Scientists have made a significant breakthrough in measuring the neutron capture cross section of plutonium-242, a crucial process for understanding nuclear reactions and developing safer and more efficient nuclear power plants.
The team used a unique experimental setup at the CERN n TOF-EAR1 facility to measure the cross section over a wide range of energies, from 0.1 electronvolts (eV) to hundreds of kiloelectronvolts (keV). This is significant because previous measurements were limited to specific energy ranges or were based on theoretical models.
The measurement was made possible by using an array of four C6D6 scintillators as detectors, which allowed the team to accurately measure the number of neutrons captured by the plutonium-242 target. The target was composed of seven thin layers of enriched plutonium-242, each 45 millimeters in diameter.
The results show that the neutron capture cross section is significantly lower than previously thought, particularly at higher energies. This has important implications for nuclear power plant design and operation, as it means that less plutonium-242 would be required to achieve the same level of energy production.
The study also highlights the importance of accurate measurements in understanding nuclear reactions. The team’s results demonstrate the need for precise and comprehensive data on neutron capture cross sections, particularly for actinides like plutonium.
Furthermore, the measurement provides valuable insights into the properties of plutonium-242 itself. By analyzing the resonance structure of the neutron capture process, scientists can gain a better understanding of the nuclear interactions involved and develop more accurate models of these reactions.
The study’s findings have significant implications for various fields, including nuclear medicine, nuclear waste disposal, and advanced reactor design. The accurate measurement of neutron capture cross sections will enable researchers to better understand and predict the behavior of plutonium-242 in different environments and applications.
Overall, this breakthrough measurement marks an important step forward in our understanding of nuclear reactions and their application in various fields.
Cite this article: “Precise Measurement of Neutron Capture Cross Section of Plutonium-242”, The Science Archive, 2025.
Neutron Capture Cross Section, Plutonium-242, Nuclear Power Plants, Cern N Tof-Ear1, Scintillators, Neutron Reactions, Actinides, Nuclear Medicine, Waste Disposal, Advanced Reactor Design.
