Sc III Spectral Properties of Astrophysical Interest

TL;DR

This paper reports detailed relativistic calculations of spectral properties for doubly ionized scandium (Sc III), providing new transition data and lifetimes relevant for astrophysical research, with a focus on electron correlation effects.

Contribution

It introduces a relativistic coupled-cluster method to accurately compute transition properties and lifetimes of Sc III, including new data not previously reported.

Findings

Calculated transition strengths and lifetimes for low-lying states.

Comparison with previous results shows improved accuracy.

First-time data for some transition properties and lifetimes.

Abstract

Transition properties such as oscillator strengths, transition rates, branching ratios and lifetimes of many low-lying states in the doubly ionized scandium (Sc III) are reported. A relativistic method in the coupled-cluster framework has been employed to incorporate the electron correlation effects due to the Coulomb interaction to all orders by considering all possible singly and doubly excited electronic configurations conjointly with the leading order triply excited configurations in a perturbative approach. Present results are compared with the previously reported results for the transition lines of astrophysical interest. In addition, some of the transition properties and lifetimes of few low-lying states are given for the first time. Role of the correlation effects in the evaluation of the transition strengths are described concisely.