Interesting. Mass-energy change at the atomic scale is usually ignored by
chemists and physicists because it is too small measure.
Now that such a small change can be measured perhaps it will lead to the
discovery/recognition of novel phenomena at the interface of chemical and
nuclear physics.

On Sat, May 9, 2020 at 1:33 PM Terry Blanton <> wrote:

> A new door to the quantum world has been opened: When an atom absorbs or
> releases energy via the quantum leap of an electron, it becomes heavier or
> lighter. This can be explained by Einstein's theory of relativity (E =
> mc2). However, the effect is minuscule for a single atom. Nevertheless, the
> team of Klaus Blaum and Sergey Eliseev at the Max Planck Institute for
> Nuclear Physics has successfully measured this infinitesimal change in the
> mass of individual atoms for the first time. In order to achieve this, they
> used the ultra-precise Pentatrap atomic balance at the Institute in
> Heidelberg. The team discovered a previously unobserved quantum state in
> rhenium, which could be interesting for future atomic clocks. Above all,
> this extremely sensitive atomic balance enables a better understanding of
> the complex quantum world of heavy atoms.

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