# Radiative rates for E1, E2, M1, and M2 transitions in F-like ions with 12 <= Z <= 23

## TL;DR

This paper provides detailed calculations of energy levels, radiative rates, and lifetimes for 11 F-like ions with atomic numbers 12 to 23, using advanced atomic structure codes to improve data accuracy.

## Contribution

It offers comprehensive atomic data for F-like ions across a range of Z values, including E1, E2, M1, and M2 transition rates, with comparisons to previous theoretical and experimental results.

## Key findings

- Calculated energy levels and radiative rates for 11 F-like ions.
- Good agreement with existing experimental and theoretical data.
- Provided data for up to 198 energy levels per ion.

## Abstract

In this paper, energy levels, radiative rates and lifetimes are reported for 11 F-like ions with 12 $\le$ Z $\le$ 23. Up to 198 levels (depending on the ion) have been considered which include 113 of the 2s$^2$2p$^5$, 2s2p$^6$, 2s$^2$2p$^4$3$\ell$, 2s2p$^5$3$\ell$, and 2p$^6$3$\ell$ configurations. The general-purpose relativistic atomic structure package ({\sc grasp}) and the flexible atomic code ({\sc fac}) have been adopted for calculating the energy levels, but the {\sc grasp} alone for the remaining parameters. Radiative rates (along with oscillator strengths and line strengths) are listed for all E1, E2, M1, and M2 transitions of the ions. Comparisons are made with earlier available theoretical and experimental energies, for all ions, in order to assess the accuracy of the calculations. Comparisons have also been made for the radiative rates and lifetimes, which have been possible for only those among the lowest 60 levels.