The Neutron Capture Process

Schematic view of the neutron capture process by a nucleus. Click on image for full size (20K JPEG)

Neutron capture can occur when a neutron approaches a nucleus close enough for nuclear forces to be effective. The neutron is captured and forms a heavier isotope of the capturing element.

When the new isotope is unstable the neutron decays into a proton (beta decay)) with the emission of an electron and of a neutrino. The following movies illustrate two neutron capture processes and subsequent element transmutation.