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- W2078582655 abstract "Energy levels, transition probabilities, and lifetimes have been determined for all levels of the Ca I spectrum up to $3d4p{}^{1}{F}_{3}^{o}$ using the multiconfiguration Hartree-Fock method with lowest-order relativistic effects included through the Breit-Pauli Hamiltonian. The mixing of singlet and triplet configuration states was found to be considerably stronger in $4s5p{}^{1,3}{P}_{1}^{o}$ levels than in $4s4p{}^{1,3}{P}_{1}^{o}$ levels. The near degeneracy of the nonrelativistic $3d4p{}^{3}{F}^{o}$ and ${}^{1}{D}^{o}$ term energies, differing by only $39.59{mathrm{cm}}^{ensuremath{-}1}$ resulted in highly mixed Breit-Pauli levels for $3d4p{}^{3}{F}_{2}^{o}$ and ${}^{1}{D}_{2}^{o}.$ Some intercombination transitions from these levels have transition probabilities of magnitude similar to weaker spin-allowed transitions. The ``fine-tuned'' transition probability for the $4s4p{}^{3}{P}_{1}^{o}ensuremath{-}4s4d{}^{1}{D}_{2}$ transition was found to be $1.53ifmmodetimeselsetexttimesfi{}{10}^{3}{mathrm{s}}^{ensuremath{-}1},$ in agreement with a quenching rate observed in a doppler cooling experiment [Binnewies et al., Phys. Rev. Lett. 87, 123002 (2001)]." @default.
- W2078582655 created "2016-06-24" @default.
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- W2078582655 date "2003-07-22" @default.
- W2078582655 modified "2023-10-18" @default.
- W2078582655 title "Allowed and spin-forbidden electric dipole transitions in Ca I" @default.
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- W2078582655 doi "https://doi.org/10.1103/physreva.68.012507" @default.
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