ENERGY RELEASED IN TERNARY FISSION

Calculated Q values for the cold splitting of even-even nuclei into th ree particles of equal size, as well as for various fission processes accompanied by light-particle emission, are listed for nuclides with Z = 90-116, The released energy gives a good indication about the compe tition between different emitted particles. Input mass values are take n from measurements (when available), from systematics, or from variou s calculated mass tables. Q values corresponding to the six most proba ble cases of binary fission are given for each parent nucleus. Lifetim es (if measured) and alpha-decay Q values and partial half-lives are g iven for the listed parents; the lifetimes for alpha decay are experim ental values or are estimated with a semiempirical formula. Four possi bilities to emit the light particle He-4,He-6,He-8, Be-6,Be-8,Be-10,Be -12, C-10,C-12,C-14,C-16,C-18, and O-14,O-16,O-18,O-20,O-22,O-24 are a nalyzed: from the most probable light fragment, from its corresponding heavy fragment, and as half a particle from each fragment of an asymm etric or symmetric binary fission; the two processes having the larges t Q values are listed with each of the 18 light particles. Data for a larger set of parent nuclei (including odd proton and neutron numbers) are available in a computer-readable file. (C) 1988 Academic Press.