Transition Rates for 3s3p2 4P–3s3p4s 4Po Transitions in Al i

Charlotte Froese Fischer,James Babb

doi:10.3390/atoms7020054

Abstract

Fully relativistic calculations have been performed for two multiplets, 3 s 3 p 2 4 P and 3 s 3 p 4 s 4 P 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 experiments.

Highlights

Atomic spectra are of vital importance as plasma diagnostics and reliable wavelengths and transition probabilities are essential for applications
Hermann et al [1] deduced transition probabilities between the fine structure lines connecting the 3s3p2 4 P and 3s3p2 4 Po multiplets from emission coefficients measured in laser ablation of aluminum in argon
This paper reports transition rates for all E1 transitions between the 3s3p2 4 P and 3s3p4s 4 Po multiplets using the variational multiconfiguration Dirac–Hartree–Fock (MCDHF) method [5], as implemented in the GRASP programs [6]

Summary

Introduction

Atomic spectra are of vital importance as plasma diagnostics and reliable wavelengths and transition probabilities are essential for applications. Hermann et al [1] deduced transition probabilities between the fine structure lines connecting the 3s3p2 4 P and 3s3p2 4 Po multiplets from emission coefficients measured in laser ablation of aluminum in argon. Multiconfiguration Dirac–Hartree–Fock (MCDHF) and relativistic configuration interaction (RCI). This paper reports transition rates for all E1 transitions between the 3s3p2 4 P and 3s3p4s 4 Po multiplets using the variational multiconfiguration Dirac–Hartree–Fock (MCDHF) method [5], as implemented in the GRASP programs [6]. The accuracy of the results is based on the accuracy of the theoretically-predicted transition energies compared with available measurements, as well as the agreement between length and velocity rates

Underlying Theory

Systematic Procedures

Results

Summary and Conclusions