AMDC
Atomic Mass Data Center


This page contains data provided by the Atomic Mass Data Center,
located at the Institute of Modern Physics, Chinese Academy of Sciences (IMP), Lanzhou, China.
Please refer to that web-site for further information about AME and NUBASE.


Atomic Mass Evaluation - AME2012

The evaluation has been published in Chinese Physics C 36 (2012) 1287-1602 (PDF), 1603-2014 (PDF).

The four main ASCII files of AME2012 are
  1. mass.mas12 - masses
  2. rct1.mas12 - reaction energies, table 1
  3. rct2.mas12 - reaction energies, table 2
  4. covariance.covar - Variances and Covariances of primary nuclides


Any work that will use these files should make reference to these paper and not to the electronic files.

A Q-Value Calculator is available, using AME2012 masses.
LiveChart presents AME2012 data in a tabular way.

Nubase Evaluation - Nubase2012

The evaluation has been published in Chinese Physics C 36 (2012) 1157-1286 (PDF).

NUBASE contains experimentaly known nuclear properties, and some that have been estimated from extrapolation, for 3827 nuclides: mass, isomeric excitation energy, half-life, spin, parity, decay modes and intensities.

An electric ASCII file of the NUBASE table, for use with computer programs, can be downloaded.


Any work that will use the file should make reference to these paper and not to the electronic files.