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CERN Confirms Lead-to-Gold Transmutation in Groundbreaking LHC Experiment

  • Physicists at CERN's Large Hadron Collider observed the conversion of lead into gold during lead-lead collisions at the ALICE detector from 2015 to 2018.
  • This transmutation resulted from high-energy collisions producing quark-gluon plasma and electromagnetic interactions that can remove protons and neutrons from lead nuclei.
  • The ALICE collaboration quantified the process by measuring about 86 billion gold nuclei, which exist for roughly a microsecond and have a total mass of only 29 picograms.
  • Marco Van Leeuwen highlighted the remarkable ability of the ALICE detectors to manage intense, direct collisions that generate thousands of particles, while simultaneously detecting events where only a handful of particles emerge, allowing detailed study of rare electromagnetic nuclear processes.
  • The results open new ways to study nuclear transmutation and improve models used to predict beam losses, but the gold quantity remains trillions of times too small for practical use.
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Eldiario.es broke the news in Spain on Thursday, May 8, 2025.
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