Half-lives and Widths
Atomic Weights of the Elements
The standard atomic weights of twelve elements having two or more stable isotopes have been changed to reflect the variability of atomic-weight values in natural terrestrial materials. These are given in the references below. In the other lists the values quoted are those suggested for material where the origin of the sample is unknown. For radioactive elements the isotope with the longest half-life is quoted in parenthesis. A number in parentheses indicates the uncertainty in the last digit of the atomic weight.
Thermal Cross Sections
S. F. Mughabghab, Atlas of Neutron Resonances, Resonance Parameters and Thermal Cross Sections Z=1-100, 5th Edtion, 2006, Elsevier.
Fission Yields for U-235 and Pu-239
Fission (shape) Isomers
see our wiki page Decay Schemes
We have used information from the Laboratoire National Henri Becquerel
Nuclear Science References
For the latest information on articles published on a nuclide for nuclide basis is given in the Nuclear Science References.
The Nuclear Science References (NSR) database is an indexed bibiliography of primary and secondary references in nuclear physics research. About 80 journals are regularly scanned for articles. Recent references are added on a weekly basis. Approximately 4300 entries are added to the database annually.
In general, articles are included in NSR if they include measured, calculated, or deduced quantitative nuclear structure or reaction data. Papers that apply previously known data are generally not included. Examples of this include neutron activation analysis using known cross sections or radiological dating using known half-lives.
NSR has been in existence for several decades, in various forms. Originally, the focus of the database was on papers related to low-energy nuclear structure studies. Over time, the scope has widened to include more reaction and high-energy references. As a result, some older references may not be included in NSR, even if more current papers covering similar data are included.
As a rule, an effort is made to enter all new primary references that fall within the database scope. In order to avoid undue duplication, not all secondary references (reports, conferences, etc) are entered.
Properties of the Elements
Values are from the CRC Handbook of Chemistry and Physics 95 Ed. 2014-2015 Editor in chief W.M. Haynes et al., CRC Press, Boca Raton, Florida.