pCI: A parallel configuration interaction software package for high-precision atomic structure calculations

C Cheung, MG Kozlov, SG Porsev… - Computer Physics …, 2025 - Elsevier
We introduce the pCI software package for high-precision atomic structure calculations. The
standard method of calculation is based on the configuration interaction (CI) method to …

Radiative decay rate and branching fractions of MgF

EB Norrgard, Y Chamorro, CC Cooksey, SP Eckel… - Physical Review A, 2023 - APS
We report measured and calculated values of radiative decay rates and vibrational
branching fractions for the A 2 Π (v= 0) state of Mg 24 F 19. The decay rate measurements …

Optical telecommunications-band clock based on neutral titanium atoms

S Eustice, D Filin, J Schrott, S Porsev, C Cheung… - Physical Review A, 2023 - APS
We propose an optical clock based on ultranarrow transitions in neutral titanium, which
exhibit small blackbody radiation and quadratic Zeeman shifts and have wavelengths in the …

Neural-network approach to running high-precision atomic computations

P Bilous, C Cheung, M Safronova - Physical Review A, 2024 - APS
Modern applications of atomic physics, including the determination of frequency standards
and the analysis of astrophysical spectra, require prediction of atomic properties with …

Calculations of multipole transitions in Sn II for kilonova analysis

AI Bondarev, JH Gillanders, C Cheung… - The European Physical …, 2023 - Springer
We use the method that combines linearized coupled-cluster and configuration interaction
approaches for calculating energy levels and multipole transition probabilities in singly …

Proposed clock transition in atomic chromium and the possible detection schemes

P Głowacki, D Stefańska, J Ruczkowski… - Journal of Quantitative …, 2022 - Elsevier
In this article radiative parameters for atomic chromium were determined by a semi-empirical
method. The eigenvector amplitudes, determined in our previously published work …