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We have determined accurate values for the energy of the 6snfF31,6snfF23 and 6snfF33 states of Ba I with principal quantum number n ranging from 13 to 45, using laseratomic-beam spectroscopy. The experimental level energies for the thus-far-unknown F31 Rydberg series compare well with predicted values from hyperfine-structure measurements in the 6snfF2,33 series for n>30 and from Stark-effect studies in the 6sndD21 series. © 1984 The American Physical Society

physical review. a, general physics

Energies of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>6</mml:mn><mml:mi>s</mml:mi><mml:mi>n</mml:mi><mml:mi>f</mml:mi><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>F</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow /><mml:mrow /><mml:mrow /><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow><mml:mo>,</mml:mo><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>F</…

Energies of the6snfF31,F