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Triplet states in the Be atom: bound state spectrum and hyperfine structure

The bound state spectrum of low-lying triplet states in the Be atom is investigated. In particular, we perform accurate computations of various bound triplet S, P, D, F, and G states in the four-electron Be atom. For the 23S(L=0) state in the Be atom we determine the hyperfine structure and a number of bound states properties by using results of highly accurate computations. The energies of the hyperfine structure levels for this state are ε(F=12) = -13725.927(7) MHz, ε(F=32) = -5490.371(7) MHz and ε(F=52) = 8235.556(7) MHz, respectively. The observed hyperfine structure splittings for the the 23S(L=0) state in the 9Be atom must be Δ12 = 8235.556(7) MHz and Δ23 = 13725.927(7) MHz, respectively.

preprint2013arXivOpen access
Alexei M. FrolovMaria Belen Ruiz
physics.atom-phphysics.opticsquant-ph
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Alexei M. FrolovMaria Belen Ruiz

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