| Interactive access to nuclear properties of interest for astrophysics for almost 9000 nuclei. Get your experimental masses and calculated masses, deformations, decay Q-values, half-lives, spins, and separation energies here! Access to potential-energy contour maps versus ε2 and γ shape degrees of freedom is also provided. |
Plot of R-Process Abundances
The magenta line shows a typical r-process path,
and the small magenta squares are the nuclei
produced when the nuclides along the path decay
back to stability after the supernova neutron
flux ends. The insert shows the solar r-process
abundances as a function of nucleon number A
The A axis of the insert curves so that
a line from a β-stable nucleus (black square
at the upper edge of the chart plot), which is perpendicular
to the line of β-stability in the chart,
will intersect the A axis at the value corresponding
to the A value of the black square of the
β-stable nucleus where the (imaginary) line
originates. An extension of the line upward
will intersect with the appropriate data point.
In the reverse, a line through, for example
the upper and lower A=120 tic mark
continuing towards the chart plot will intersect
the black square (β-stable nucleus) with A=120.
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THIS PAGE IS BEING UPDATED TO FRDM2012.
OLDER MASS AND HALF-LIFE DATA ARE USED UNLESS THE LINK SAYS 2012
Nuclear Ground-State Masses and Deformations FRDM(2012), by P. Möller, A. J. Sierk, T. Ichikawa, and H. Sagawa, Atomic Data Nucl. Data Tables 109-110 (2016), 1-204. The older calculated masses and deformations are from Nuclear Ground-State Masses and Deformations, by P. Möller, J. R. Nix, W. D. Myers, and W. J. Swiatecki Atomic Data Nucl. Data Tables 59 (1995), 185-381. The other calculated nuclear properties are from Nuclear Properties for Astrophysical and Radioactive-Ion-Beam Applications, by P. Möller, J. R. Nix, and K.-L. Kratz, Atomic Data Nucl. Data Tables 66 (1997), 131-343. The reference to the calculated ground-state potential-energy surfaces is NUCLEAR SHAPE ISOMERS P. Möller, A. J. Sierk, R. Bengtsson, H. Sagawa, T. Ichikawa Atomic Data and Nuclear Data Tables 98 (2012) 149-300. This publication presents potential-energy surfaces of most even-even nuclei, here we provide access to stand-alone potential-energy surfaces of all 7206 nuclides we calculated. In addition the surfaces here are in color. A preprint of the ADNDT publication with associated figures and tables is available on our web site. But for the complete publication we recommend the published version available on the ADNDT web site. The reference to the fission potential-energy surfaces calculated in three dimensions (ε2,ε4,γ) posted on this web site, simplified to 2D contour diagrams versus ε2 and γ, is HEAVY-ELEMENT FISSION BARRIERS P. Möller, A. J. Sierk, T. Ichikawa, A. Iwamoto,R. Bengtsson, H. Uhrenholt, and S. Åberg, Physical Review C 79 (2009) 064304. Please note that a more complete characterization of the fission barriers also requires calculations in 5 dimensions in the three-quadratic-surface parameterization for several million different nuclear shapes. Such calculations are also carried out in the above reference, but the complexity of such surfaces prevents them to be simplified to two-dimensional contour drawings. The mass evaluation we used in adjusting the FRDM2012 is AME2003 (A. H. Wapstra, G. Audi, and C. Thibault, Nucl. Phys. A729 (2003), 129). A more recent experimental mass evaluation is by Wang et al (M. Wang, G. Audi, A. H. Wapstra, F. G. Kondev, M. MacCormick, X. Xu, and B. Pfeiffer, Chin. Phys. C 36 (2012) 1603) which we use here. Another repository of this evaluation and related data can be found here . An exhaustive list of nuclear-mass data bases and other mass-related resources is found here . |