Accelerator tunnels at the European XFEL, where atomic motion is meticulously studied.
Xfel/Heiner Mueller-Elsner
In a groundbreaking achievement, a highly advanced X-ray laser has successfully unveiled the slight atomic movements of molecules that are typically expected to remain stationary.
Quantum physics thrives on uncertainty. Heisenberg’s uncertainty principle prevents scientists from simultaneously and accurately determining a particle’s position and momentum, indicating that quantum particles can never be fully at rest. Instead, atoms are perpetually in motion, albeit minuscule.
Nonetheless, measuring this subtle Heisenberg wiggle is challenging in complex molecules where atoms exhibit various motion patterns. Recently, Till Janke from the XFEL facility, along with his team, successfully captured this phenomenon using molecules composed of 11 atoms, including carbon, hydrogen, nitrogen, and iodine.
“This was my first experiment utilizing an extraordinary tool,” Janke remarked. The pivotal device was the “laser beast,” which bombarded molecules with intense bursts of X-rays. Although the pulse duration was only a quarter of a second, it was a million times brighter than conventional medical X-rays.
Each X-ray pulse stripped electrons from the molecule, causing the atoms to become positively charged and repel explosively from each other. By analyzing the aftermath of these explosions, scientists were able to reconstruct quantum variations of atoms in detail at their lowest energy states.
The team discovered that Heisenberg’s wiggle appears to follow a synchronized pattern in the movements of specific atoms. While this wasn’t unexpected based on the molecular structure, the researchers were astonished by the precision of their measurements, as noted by team member Ludger Inhester at German electronic synchrotrons.
Next, the researchers aim to explore how quantum fluctuations influence molecular behavior during chemical reactions. They also intend to adapt their methodology to study electron movements.
“We are exploring ways to expand our findings to larger systems. There are numerous avenues for future research,” shared team member Rebecca Bol from European XFEL.
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Source: www.newscientist.com
