Hyperfine structure arises from the coupling between electronic magnetic moments and nuclear spin and quadrupole moments, leading to minute energy‐level splittings superimposed on fine‐structure ...

ALPHA has measured the ground-state hyperfine splitting of antihydrogen a hundred times more precisely than before, ...

The hyperfine structure of atomic spectra arises from interactions between the electromagnetic moments of the atomic nucleus and the surrounding electrons. These interactions, dominated by the ...

Last year, physicists cast doubt on our current understanding of the interplay between electrons and atomic nuclei, and are now upping the ante by proposing a solution to this so-called “hyperfine ...

Since the late 1960s, the Laboratoire Aimé Cotton (LAC) in Orsay, France, has made significant progress in the classification of complex atomic spectra. These advances have been driven both by the ...

Two experiment collaborations, the g2p and EG4 collaborations, combined their complementary data on the proton's inner structure to improve calculations of a phenomenon in atomic physics known as the ...