General References

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Physical Constants

List of physical constants


CODATA recommended values of the fundamental physical constants: 2016, Rev. Mod. Phys., Vol. 88, No. 3, July–September 2016
CODATA recommended values of the fundamental physical constants: 2010, Rev. Mod. Phys. 84, 1527.

Half-lives and Widths

Particle lifetimes from the uncertainty principle


Isotopic compositions of the elements 2009

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.


Atomic weights of the elements 2013

Isotopic compositions of the elements 2009

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

Handbook of Nuclear Data for Safeguards: Database Extensions

Fission (shape) Isomers

Table of Superdeformed Nuclear Bands and Fission Isomers ☆: Third Edition (October 2002)

Decay Schemes

see our wiki page Decay Schemes

We have used information from the Laboratoire National Henri Becquerel

Table of Radionuclides

Recommended Data

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

Excerpt from the Karlsruhe Nuclide Chart. Densities are given at 25 C. Densities for gaseous elements are given in g/l

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.

Nuclear Data Files and their References

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