Show of Hands

firefly5 July 18th, 2014 1:46pm

Science Friday (3/3): helium-4 (2 protons, 2 neutrons) is a composite boson, while helium-3 (2 protons, 1 neutron) is a composite fermion. this allows an ensemble of helium-4 to have a lower zero-point energy than helium-3.