An update of the nuclear moments update: masses and charge radii

For those of you who are following my blog or twitter feed, what I am about to say is not quite new. I have already made a comment a couple of weeks ago regarding the last update of the database I administer. The database contains non-evaluated, experimentally deduced values of nuclear magnetic dipole and electric quadrupole moments. The official release of the database is hosted on IAEA servers and they are responsible for the dissemination of the information included to the world’s nuclear community. However, I keep a test server available for updates and testing new ideas before they appear on the IAEA’s website. This URL is

As I said earlier, a couple of weeks ago I have managed to find the time and upgrade the database with two important observables that people have requested in the recent past. The first one is masses, while the second one is nuclear charge radii. The former is listed in each isotope selected in the database in the form of mass excess Δm (=mass-A). Please notice I do not provide the whole table maintained by the Chinese colleagues (latest AME2012). Rather, I use it as an associate value to the spectroscopic values included when an isotope is selected.

The nuclear charge radii on the other hand is a new addition to the database and I intend to keep updating regardless the official releases (in print format) by IAEA or any other source. The radii are important structure information and as such they will be treated with extra care during each upgrade.

Besides these two extensive updates, lifetimes, spins and parities are slowly being synced with the evaluated data existing in the ENSDF.

You spot a problem or have something to say about the database, please let me know.