Transition properties of a potassium atom

Abstract

We report here oscillator strengths, transition rates, branching ratios and lifetimes due to allowed transitions in potassium (K) atom. We evaluate electric dipole (E1) amplitudes using an all order relativistic many-body perturbation method. The obtained results are compared with previously available experimental and theoretical studies. Using the E1 matrix elements mentioned above and estimated from the lifetimes of the 4P states, we determine precise values of static and dynamic polarizabilities for the first five low-lying states in the considered atom. The static polarizabilities of the ground and 4P states in the present work are more precise than the available measurements in these states. Only the present work employs relativistic theory to evaluate polarizabilities in the 3D states for which no experimental results are known to compare with. We also reexamine "magic wavelengths" for the 4P 1/2 → 4S and 4P 3/2 → 4S transitions due to the linearly polarized light which are useful to perform state-insensitive trapping of K atoms.

Potassium tune-out-wavelength measurement using atom interferometry and a multipass optical cavity

“…Theoretical values for α r have been calculated by several theorists including [12,35,39]. Using our λ zero measurement of 768.9701(4) nm and the theoretical α r (λ zero ) = 6.7009 a.u.…”

“…spec. [47,67,68] MBPT (1) [45] MBPT (2) [45] MBPT (3) [45] MBPT (3+ scaling) [46] RMBPT(DF) [37] RMBPT(DF+2) [37] RMBPT(DF+2+3) [37] RMBPT(SD) [37] RCICP [12] CICP [12] DHF [39] CCSD(T) [39] BGLS [40] AIFM [2] this work MBPT (1) [45] MBPT (2) [45] MBPT (3) [45] MBPT (3+ scaling) [46] BGLS [40] BEC IFM [3] MBPT (1) [45] MBPT (2) [45] MBPT (3) [45] MBPT (3+ scaling) [46] All orders MBPT [69] BGLS [40] Abs. spec.…”

“…CICP refers to the configuration interaction plus core polarization method [12]. DHF refers to the Dirac-Hartree-Fock method [39]. CCSD refers to the singles-doubles coupled-cluster method [39].…”

“…DHF refers to the Dirac-Hartree-Fock method [39]. CCSD refers to the singles-doubles coupled-cluster method [39]. BGLS refers to beam-gas-laser spectroscopy measurements [40].…”

Simultaneous loading of39K and Rb into a crossed dipole trap: Characterization and two-body losses

“…To accurately calculate the shifts appearing in Eq. (1), the dynamic polarizabilities are calculated and compared with the existing literature appearing in [28,29]. The scalar polarizabilities of the 4s 1/2 and 4p 3/2 states in potassium and the 5s 1/2 and 5p 3/2 states in rubidium have been calculated according to [29] α 0 k (ω) =…”