For decades, nuclear physicists believed that "Islands of Inversion"—regions where the normal rules of nuclear structure suddenly break down—were found mostly in neutron-rich isotopes. In these ...

The red ball, blue star and black square represent the corresponding results of Rn, Ra and Th isotopes, respectively. In the shell model, the neutron number N=126 is regarded as a neutron magic number ...

Some atoms are stable, while others seem to fall apart. Lead-208 will probably last forever, while the synthetic isotope technetium-99 exists for just hours. The difference lies in the structure of ...