Tables of E2 transition probabilities from the first 2+2+ states in even–even nuclei

• Compilation of experimental transition probabilities or B(E2) values for the known first 2+ states in even–even nuclei.
• Evaluation of B(E2) values, lifetimes and deformation parameters for 447 even–even nuclei.
• Extensive discussion on data evaluation policies and procedures.
• Nuclear shell model calculation of the first 2+ states energies and B(E2) values in even–even nuclei.

Experimental results of E2 transition probabilities or B(E2) values for the known first 2+ states in 447 even–even nuclei have been compiled and evaluated. The evaluation policies for the analysis of experimental data have been described and new results are discussed. The recommended B(E2) values have been compared with comprehensive shell model calculations for a selected set of nuclei, where such theoretical procedures are amenable. The present work was motivated by a rapid increase in the number of new B(E2) measurements for the first 2+ states since the previous evaluation of such data by S. Raman et al. published in 2001. Future plans to investigate the systematics of B(E2)↑↑ values, and intercomparison of different experimental techniques to obtain these data are outlined.