# Transition rates for $3s3p^2\;^4P - 3s3p4s\;^4P^o$ transitions in Al I

## TL;DR

This paper presents relativistic calculations of transition rates between specific energy levels in neutral aluminum, improving agreement with experimental data and reducing previous discrepancies.

## Contribution

The study provides new relativistic transition rates for Al I multiplets using GRASP, with improved accuracy over earlier theoretical estimates.

## Key findings

- Calculated transition rates are about 10% smaller than observed values.
- Results reduce discrepancies between theory and experiment.
- Wave functions obtained for all levels of the multiplets.

## Abstract

Fully relativistic calculations have been performed for two multiplets, $3s3p^2\;^4P$ and $3s3p4s\;^4P^o$, in Al I. Wave functions were obtained for all levels of these multiplets using the GRASP programs. Reported are the E1 transitions rates for all transitions between levels of these multiplets. Transition energies and transition rates are compared with observed values and other theory. Our calculated transition rates are smaller by about 10% than observed rates, reducing a large discrepancy between earlier calculations and experiment.