Modern-day alchemy! Scientists turn lead into gold at the Large Hadron Collider
By Victoria Corless published May 13, 2025
There wasn’t a lot of gold and it didn’t last long, but the results are still impressive.
For centuries, alchemists dreamed of turning lead into gold — not through magic, but by unlocking the hidden potential within metals themselves. While their methods never panned out, those of modern science finally have.
Researchers at the Large Hadron Collider (LHC) — the world’s largest and highest-energy particle accelerator — have observed a real-life transmutation of lead into gold. But this transformation didn’t come from direct collisions, as was previously observed. Instead, it emerged through a new mechanism involving near-miss interactions between atomic nuclei.
The LHC was built to accelerate particles to near the speed of light. The collisions of these particles allow scientists to study the fundamental building blocks of matter and explore how our universe is structured on its smallest scales.
While vital information has been gleaned from such head-on collisions, most encounters inside the collider are indirect. In these “near misses,” particles pass close to one another without making contact yet generate electromagnetic fields so intense that they can trigger unexpected nuclear reactions.
“The electromagnetic field emanating from a lead nucleus is particularly strong because the nucleus contains 82 protons, each carrying one elementary charge,” officials with the European Organization for Nuclear Research (known by its French acronym, CERN) wrote in a statement.
“Moreover, the very high speed at which lead nuclei travel in the LHC (corresponding to 99.999993% of the speed of light) causes the electromagnetic field lines to be squashed into a thin pancake, transverse to the direction of motion, producing a short-lived pulse of photons,” they added.
This pulse can trigger a process known as electromagnetic dissociation, in which a photon interacts with a nucleus, inducing internal oscillations that eject neutrons and photons. In the case of a passing lead atom, the loss of three protons through this process results in the formation of gold.
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“It is impressive to see that our detectors can handle head-on collisions producing thousands of particles, while also being sensitive to collisions where only a few particles are produced at a time, enabling the study of electromagnetic ‘nuclear transmutation’ processes,” Marco Van Leeuwen, spokesperson for the ALICE (A Large Ion Collider Experiment) project at the LHC, the team behind the new results, said in the same statement.
The work “is the first to systematically detect and analyze the signature of gold production at the LHC experimentally,” added Uliana Dmitrieva of the ALICE collaboration.
The team was able to identify proton loss not only associated with the formation of gold, but also with the production of lead, thallium and mercury atoms. This analysis was made possible by a device called a zero degree calorimeter (ZDC), which detects and counts the photon-nucleus interactions by measuring the resulting emissions.
The team reported that the LHC can produce up to 89,000 gold nuclei per second from lead-lead collisions. “The ALICE analysis shows that, during Run 2 of the LHC (2015-2018), about 86 billion gold nuclei were created at the four major experiments,” CERN officials wrote in the statement.
However, any modern-day alchemist hoping to cash in might be disappointed. This corresponds to just 29 picograms (2.9 ×10-11 grams) of material, and these gold atoms are extremely short-lived. They’re so energetic that they immediately slam into parts of the LHC, like the beam pipe or collimators, breaking apart almost instantly into protons, neutrons and other particles. As a result, the gold exists for only a fleeting fraction of a second.
“The results […] test and improve theoretical models of electromagnetic dissociation which, beyond their intrinsic physics interest, are used to understand and predict beam losses that are a major limit on the performance of the LHC and future colliders,” concluded John Jowett, also of the ALICE collaboration.
Source: Space
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Scientists Accidentally Turned Lead Into Gold
By Maggie Harrison Dupré
May 14, 10:35 AM EDT
They achieved the “dream of medieval alchemists.”
Goldfinger
The mad geniuses over at CERN have accomplished what alchemists of yore never could: they turned lead into gold.
As detailed in a paper published last week in the journal Physical Review C, researchers working with the European Organization for Nuclear Research’s (CERN) atom-annihilating Large Hadron Collider (LHC) accidentally transformed humble lead into temporary gold nuclei.
The researchers are part of CERN’s A Large Ion Collider Experiment (ALICE) project, which, put simply, involves scientists smashing atomic particles together at close to the speed of light in an attempt to replicate the conditions that followed the Big Bang.
The discovery, they say, is an incidental outcome of their experimentation with collisions between lead nuclei, which contain three more protons than gold.
Sometimes, as the paper explains, rather than hit each other directly, the ions graze past each other. And when that happens, the combined power of the ions’ electromagnetic fields causes lead nuclei to release three of their protons in a process known as electromagnetic dissociation, effectively transmuting a lead nucleus into one of noble gold.
Flashes of Gold
Before anyone gets too excited: CERN scientists aren’t about to unleash the hand of Midas.
As Nature reported, the researchers estimate that LHC collisions conducted between 2015 and 2018 resulted in 86 billion accidental gold nuclei. While that may sound like a lot of gold, it isn’t — it only comes out to around 29 trillionths of a gram, which is worth next to nothing.
The nuclei were also short-lived and likely only lasted for a microsecond or so.
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This would also be a wildly inefficient way to try and create gold from lead at scale, as The Register pointed out, given how much time, energy, and money go into powering the LHC.
Regardless, researchers are chalking this up as a fascinating scientific finding that could pave the way for future experimentation.
“Understanding such processes is crucial for controlling beam quality and stability,” Stony Brook University physicist Jiangyong Jia, who has worked at the LHC, told Nature.
While the gold flakes may be temporary, it’s a stunning result nonetheless.
“The transmutation of lead into gold is the dream of medieval alchemists,” reads the paper, “which comes true at the LHC.”
Source: Futurism
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