Nuclear Data Sheets for A=23

Evaluated spectroscopic data and level schemes from radioactive decay and nuclear reaction studies are presented for ²³N, ²³O, ²³F, ²³Ne, ²³Na, ²³Mg, ²³Al, and ²³Si. This evaluation for A=23 supersedes the earlier one by R. B. Firestone (2007Fi02). Highlights: of this evaluation are the following: The recommended absolute γ-ray emission probability (%Pγ) in the ²³Ne β-decay was reported with 3.0% systematic uncertainty in 1986BrZQ. In 2007Fi02, the Pγ for the most intense γ ray was recommended with 4% uncertainty. These uncertainties are comparable with the total excited state β feeding uncertainty of 33 l, resulting from 100–67 l (g.s. β feeding) in ²³Na (1963Ca06). In this evaluation, notes are added for relative and absolute γ-ray emission probabilities. From new measurements 2020Kw01 constrain the spin of the 7788 keV level, the dominant resonance state for the ²²Na(p,γ)²²Mg reaction rate at stellar temperature, in ²³Mg to (3/2⁺,5/2⁺). Earlier assignment was 7/2⁺. The ²³Al ε decay scheme appears to be incomplete. Some of the latest reported data on the ²³Al ε decay study in the literature need verification.