nuclear physics Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions, in addition to the study of other forms of nuclear matter. Nuclear physics should not be confused with atomic physics, which studies the ...

, Ronen's golden rule for cluster radioactivity is that the most favorable parents for

heavy ion High-energy nuclear physics studies the behavior of nuclear matter in energy regimes typical of high-energy physics. The primary focus of this field is the study of heavy-ion collisions, as compared to lighter atoms in other particle accelerato ...

emission (cluster radioactivity) are those that emit clusters which have

atomic mass The atomic mass (''m''a or ''m'') is the mass of an atom. Although the SI unit of mass is the kilogram (symbol: kg), atomic mass is often expressed in the non-SI unit dalton (symbol: Da) – equivalently, unified atomic mass unit (u). 1&nbs ...

A_

which is given by

A_=A_+4+B_

. The atomic number

Z

is even,

A_=0

B_=0

for

Z/2

- odd and

B_{z/2}=2

for

Z/2

- even. The daughter nuclei is preferably magic, close to the

double magic In nuclear physics, a magic number is a number of nucleons (either protons or neutrons, separately) such that they are arranged into complete shells within the atomic nucleus. As a result, atomic nuclei with a 'magic' number of protons or neutro ...

²⁰⁸Pb.

References

1. ^Tavares, O.A.P., Roberto, L.A.M. and Medeiros, E.L., "Radioactive decay by the emission of heavy nuclear fragments". ''Phys. Scr.'' 76, 376, (2007). Nuclear physics