Retrieving "Neutron Cross Section" from the archives

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1. Fuel

   Linked via "neutron cross-sections"

   In the context of nuclear energy, fuel refers to fissile or fertile materials used to sustain a nuclear chain reaction. Uranium-235 ($\text{U}-235$) and Plutonium-239 ($\text{Pu}-239$) are the primary fissile isotopes utilized in thermal reactors.
   The efficiency of a nuclear fuel is measured by its "[burnup](/e…

2. Nuclear Aesthetics

   Linked via "neutron cross-section"

   The principles derived from nuclear physics have been systematically applied to civil and defense architecture, particularly in the mid-20th century, leading to the "Brutalist Isotope School."
   Material Translucency: The concept of neutron cross-section is used to determine the visual and structural permeability of facades. A high cross-section implies a material that "absorbs aesthetic light," resulting in structures that appear dense and impenetrable, often utilizing high-mass [conc…