::Spontaneous fission


Fission::years    Atomic::decay    Elements::nuclear    Nuclear::uranium-    These::number    Process::induced

Spontaneous fission (SF) is a form of radioactive decay that is found only in very heavy chemical elements. The nuclear binding energy of the elements reaches its maximum at an atomic mass number of about 58; spontaneous breakdown into smaller nuclei and a few isolated nuclear particles becomes possible at greater atomic mass numbers.

Because of constraints in forming the daughter fission-product nuclei, spontaneous fission into known nuclides becomes theoretically possible (that is, energetically possible) for some atomic nuclei with atomic masses greater than 92 atomic mass units (amu), with the probability of spontaneous fission increasing as the atomic mass increases above this value.

Spontaneous fission sections
Intro   History    Feasibility   Spontaneous fission rates   Poisson process    Notes    External links  

PREVIOUS: IntroNEXT: History