High-precision calculations of the $1s^{2} 2s 2p$ $^1P_{1} \to 1s^{2} 2s^{2}$ $^1S_{0}$ spin-allowed $E1$ transition in C {\small III}

Moazzam Bilal; Andrey V Volotka; Randolf Beerwerth; Jan Rothhardt; Vinzenz Hilbert; Stephan Fritzsche

doi:10.1103/PhysRevA.99.062511

paper

High-precision calculations of the $1 s^{2} 2 s 2 p$ $^{1} P_{1} \to 1 s^{2} 2 s^{2}$ $^{1} S_{0}$ spin-allowed $E 1$ transition in C {\small III}

arXiv:1906.11165 · doi:10.1103/PhysRevA.99.062511

Abstract

Large-scale relativistic calculations are performed for the transition energy and line strength of the $1 s^{2} 2 s 2 p$ $^{1} P_{1} - 1 s^{2} 2 s^{2}$ $^{1} S_{0}$ transition in Be-like carbon. Based on the multiconfiguration Dirac-Hartree-Fock~(MCDHF) approach, different correlation models are developed to account for all major electron-electron correlation contributions. These correlation models are tested with various sets of the initial and the final state wave functions. The uncertainty of the predicted line strength due to missing correlation effects is estimated from the differences between the results obtained with those models. The finite nuclear mass effect is accurately calculated taking into account the energy, wave functions as well as operator contributions. As a result, a reliable theoretical benchmark of the $E 1$ line strength is provided to support high precision lifetime measurement of the $1 s^{2} 2 s 2 p$ $^{1} P_{1}$ state in Be-like carbon.

High-precision calculations of the 1s22s2p 1P1​→1s22s2 1S0​ spin-allowed E1 transition in C {\small III}

Abstract

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High-precision calculations of the $1 s^{2} 2 s 2 p$ $^{1} P_{1} \to 1 s^{2} 2 s^{2}$ $^{1} S_{0}$ spin-allowed $E 1$ transition in C {\small III}