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ALICE detects the conversion of lead into gold at the Large Hadron Collider

  • Physicists at CERN's Large Hadron Collider observed the conversion of lead into microscopic amounts of gold between 2015 and 2018 near Geneva, Switzerland.
  • This transmutation occurred during high-speed lead-lead collisions that recreated quark-gluon plasma, enabling nuclear interactions that knocked protons from lead nuclei to form gold.
  • The ALICE detector, designed to study early-universe conditions, measured about 86 billion gold nuclei with extreme sensitivity despite not being built to produce gold.
  • The total gold mass produced was only 29 picograms, lasting microseconds before disintegrating, and the production rate reached about 89,000 nuclei per second as reported by ALICE spokesperson Marco Van Leeuwen.
  • Although this realization fulfilled a centuries-old alchemical dream, the minuscule quantity and brief existence of the gold highlight the process's impracticality beyond scientific insights into nuclear and electromagnetic phenomena.
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Eldiario.es broke the news in Spain on Thursday, May 8, 2025.
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