Abundance database

[tim.hbn]

Hi Everyone

Does anyone here know if there is a complete database on the Internet which gives both the natural and synthetic abundances of all radioisotopes?

I have done searches on Google and have only found databases that give natural abundances, not synthetic abundances.

Thank you very much.

Kind regards

Tim

[Sesselmann]

Hi Tim,

This is usually my go to database: http://nucleardata.nuclear.lu.se/toi/

This one and other useful links can be found on my links page here: https://www.gammaspectacular.com/blue/links

Steven

[tim.hbn]

Hi Steven

Thank you very much for your help with this.

Kind regards

Tim

[GigaBecquerel]

Wikipedia also has isotopic abundance information on pretty much any element, on the bottom of the table on the right, eg.:
https://en.wikipedia.org/wiki/Uranium

[Rob Tayloe]

The Wise Uranium Project has available several on-line calculators that may be of some use. When I was teaching a nuclear lab course at the Ohio State University's nuclear reactor we made use of the neutron activation calculator. For some labs I would take small samples of materials and subject these samples to a thermal neutron field to cause a particular activation reaction to occur. The decay of the activated material would present some interesting gamma spectra.

Following are links to the Wise Uranium Project set of calculators -

http://www.wise-uranium.org/calc.html

The neutron activation calculator tool is found at the link below -

http://www.wise-uranium.org/rnac.html

The National Nuclear Data Center (NNDC) at the Brookhaven National Laboratory has cross section and other nuclear reaction data available -

https://www.nndc.bnl.gov/

The BNL NNDC interactive chart of the nuclides can be found at the link below -

https://www.nndc.bnl.gov/nudat2/

[jneilson]

For natural abundances, the lists on places like Wikipedia are good, but it's generally advisable to follow the chain of references back to source publications, where you find things like Meija et al "Isotopic compositions of the elements 2013 (IUPAC Technical Report)" https://www.researchgate.net/publicatio ... cal_Report

I'm not convinced the concept of "synthetic abundances" is well defined, which is perhaps why you found information was limited. I guess there's a few different ideas that could all be partly termed "synthetic abundance", so I'm not sure what specifically you're looking for.

Fission Product Yields are one area of "synthetic abundance" that you can usually find databases for - although do note the yields depend both on the fission fuel and the neutron spectrum.

If you're looking more generally to extend the concept of natural abundance to the shorter-lived nuclides, there's questions in what anthropogenic activity you would include or exclude. I guess with sufficient information you could form an equivalent of natural abundances by totalling up the amounts of each nuclide on Earth - but do you really mean everything (including in reactors, spent fuel, medical isotope production etc)? Or just to include widespread synthetic activity in the environment from weapons testing fallout, accidents and discharges? Or are you just looking to fill in the shorter-lived Naturally Occurring Radioactive Materials (NORM) nuclides in the U/Ra/Th decay chains? (In which case, I guess you can calculate abundances of those from the abundances of their parent nuclides, assuming secular equilibrium - I guess you'd also need to factor in their specific activities and half-lives as part of that calculation)