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- W2325341749 startingPage "573" @default.
- W2325341749 abstract "The fine structure of helium levels $(1s3p)^{3}P_{J}$, $J=1, 2$ is determined by the microwave-optical method outlined in the preceding paper. Helium atoms are excited to $3^{3}P_{J}$ by electron bombardment and the optical radiation $3^{3}P_{J}ensuremath{rightarrow}2^{3}S_{1}(3889 mathrm{A})$ is observed with a photomultiplier tube. The intensity of this radiation changes when radio waves induce transitions between the fine structure sublevels. The separation $3^{3}P_{1}ensuremath{-}3^{3}P_{2}$ is found to be 658.0ifmmodepmelsetextpmfi{}1.0 Mc/sec, which is to be compared to the most recent optical estimates of 750ifmmodepmelsetextpmfi{}300 Mc/sec." @default.
- W2325341749 created "2016-06-24" @default.
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- W2325341749 date "1957-01-15" @default.
- W2325341749 modified "2023-10-18" @default.
- W2325341749 title "Measurement of the Fine Structure Separation<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mn>3</mml:mn><mml:mi /><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>P</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow /><mml:mrow /><mml:mrow /><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow><mml:mo>−</mml:mo><mml:mn>3</mml:mn><mml:mn /><mml:mi /><mml:mrow><mml:mmultiscripts…" @default.
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- W2325341749 doi "https://doi.org/10.1103/physrev.105.573" @default.
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