Even-odd Effects of Fragment Yields in Low Energy Fission

Since the discovery of fission even-odd staggering of proton, neutron and mass yields of the fragments and their energies has been a topic of ongoing research. In the present survey only low energy fission is covered, i.e. spontaneous fission and thermal neutron induced fission of actinides. From studies of fragment yields and their even-odd staggering in cold fission the lesson is drawn that in models of adiabatic fission, where breaking of nucleon pairs is attributed to non- adiabatic neck rupture, two parameters have to be taken into account: neck size and speed of neck rupture.