Actinide Alpha Decay Chains
|Cm||Puƒ||Cf||Ac№||10–22 y||m is
|Cfƒ||Amƒ||Cfƒ||140 y –
No fission products
|Cm||4n+1||U№||211–348 ky||Tc||₡ can capture||Sn||Se|
|Th№||U№||Uƒ№||0.7–14 Gy||fission product yield|
In the four tables below, the minor branches of decay (with the branching ratio of less than 0.0001%) are omitted. The energy release includes the total kinetic energy of all the emitted particles (electrons, alpha particles, gamma quanta, neutrinos, Auger electrons and X-rays) and the recoil nucleus, assuming that the original nucleus was at rest. The letter 'a' represents a year.
In the tables below (except neptunium), the historic names of the naturally occurring nuclides are also given. These names were used at the time when the decay chains were first discovered and investigated. From these historical names one can locate the particular chain to which the nuclide belongs, and replace it with its modern name.
The three naturally-occurring actinide alpha decay chains given below—thorium, uranium/radium (from U-238), and actinium (from U-235)—each ends with its own specific lead isotope (Pb-208, Pb-206, and Pb-207 respectively). All these isotopes are stable and are also present in nature as primordial nuclides, but their excess amounts in comparison with lead-204 (which has only a primordial origin) can be used in the technique of uranium-lead dating to date rocks.
Read more about this topic: Decay Chain
Other articles related to "actinide alpha decay chains, chain, decay":
... The 4n+3 chain of uranium-235 is commonly called the "actinium series" ... Beginning with the naturally-occurring isotope U-235, this decay series includes the following elements Actinium, astatine, bismuth, francium, lead, polonium, protactinium, radium ... nuclide historic name (short) historic name (long) decay mode half-life (a=year) energy released, MeV product of decay 239Pu α 2.41·104 a 5.244 235U 235U AcU Actin Uranium ...
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