All together now

 作者:高谡     |      日期:2019-03-08 08:19:00
PROTONS and neutrons can form tiny “molecules” within an atom rather than uniform clumps, say physicists in Europe. In normal molecules, electrons hold the atoms together. Researchers suspected that the particles inside atomic nuclei might be able to link up in a similar way. So Martin Freer of the University of Birmingham and his colleagues studied the decay patterns of a heavy isotope of beryllium that they created using a cyclotron in Caen, France (Physical Review Letters, vol 82, p 1383). The team’s findings suggest that protons in the beryllium nuclei form molecule-like structures by sharing neutrons, just as atomic nuclei link up by sharing electrons. “It’d be nice to think that these structures could get really, really big,