The Online Berkeley Evaluated Alpha and Proton Radioactivity database (BE$αp$R) -- from Li to Og!

Abstract

We have developed the new Berkeley Evaluated Alpha and proton Radioactivity (BE$αp$R) database detailing information on all known $β^{+}$-delayed and direct heavy-particle emitters (p, $α$, cluster, fission). The compiled data encompasses branching ratios, half lives, and all relevant $Q$-values and particle-separation energies. These are listed for all nuclei where such decays are energetically possible. In addition, for nuclei with known discrete proton and alpha transitions, the particle-emission energies, intensities, and associated initial and final states are also provided. A graphical illustration of the major decay modes and a corresponding list of experimental references is also given for each dataset. The compiled nuclides are organized by their isospin projection ($T_{z}$) and split into even and odd $Z$ datasets. Complete compilations of the database from $T_{z} = -4$ to $T_{z} = +31$ are included. We intend to maintain this database and post updates periodically as new relevant data becomes available. In its current construct, information from this database can currently be downloaded, in part or entirely, in portable document format as we are developing a more useful machine-readable format for future dissemination. Making the database publicly available in the manner described here represents the first step in the ongoing development of a fully open-source project.