A team from the Vienna University of Technology, in collaboration with international partners, has successfully developed the first clock using an atomic nucleus, marking a new era in precise measurements.
Atomic clocks, known for their accuracy, have been in use for decades. However, this development takes a step further. The new technology utilizes the nucleus of an atom – specifically the nucleus of a thorium atom – instead of standard atoms, allowing for even more precise time measurement.
The thorium atom is unique because it enables transitions between two states using lasers, which can be employed to create an extremely accurate clock.
“We have proven that we can use the nucleus of an atom to measure time,” said Thorsten Schumm, the project leader. The next step is further technological development to achieve even more precise results.
Every clock has what is called a timekeeper. In traditional clocks, this is the pendulum, while in atomic clocks, atoms perform this function. When a laser hits an atom, its energy changes, and this change can be measured with precision. Based on that, scientists can calculate time with incredible accuracy.
Instead of using atoms, this clock uses an atomic nucleus, which is much smaller and more resistant to external influences. This means it can measure time even more precisely and stably than previous clocks. The thorium atom’s nucleus is special because it can be adjusted using lasers, unlike most other atomic nuclei that require much more energy, according to a statement from the Vienna City Office in Sarajevo.
Photo©️Oliver Diekmann, TU Wien
