Precise magnetic data to establish the unusual nuclear shape of beryllium-11

Atomic nuclei come in a range of shapes and sizes, from spherical to pear-shaped, and many behave as if they were blobs of an incompressible fluid. A few nuclei are different—beryllium-11, for example, has an inner core of protons and neutrons with an outer ‘halo’ neutron, which makes the effective nuclear radius of this isotope much larger than predicted by simple models.

from Physics News

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