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- W2045447183 abstract "The mass of ${mathrm{B}}^{8}$ has been determined by measuring the threshold energy of the reaction ${mathrm{Li}}^{6}({mathrm{He}}^{3}, n){mathrm{B}}^{8}$. Observations were made on both the neutrons from the reaction and the positrons from the decay of ${mathrm{B}}^{8}$. The threshold energy is 2.9661ifmmodepmelsetextpmfi{}0.0017 Mev, giving a mass of 8.027157ifmmodepmelsetextpmfi{}0.000008 amu for ${mathrm{B}}^{8}$. The half-life of ${mathrm{B}}^{8}$ was measured to be 0.78ifmmodepmelsetextpmfi{}0.01 sec. Evidence was found for possible excited states in ${mathrm{B}}^{8}$ at 0.6ifmmodepmelsetextpmfi{}0.1 and 0.80ifmmodepmelsetextpmfi{}0.05 Mev with respective widths of 0.2ifmmodepmelsetextpmfi{}0.1 and 0.07ifmmodepmelsetextpmfi{}0.04 Mev. Assuming that the decay proceeds exclusively to the 2.9-Mev state of ${mathrm{Be}}^{8}$, the $logmathrm{ft}$ value is 5.7." @default.
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- W2045447183 date "1958-06-01" @default.
- W2045447183 modified "2023-10-09" @default.
- W2045447183 title "Mass, Half-Life, and Excited States of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>B</mml:mi></mml:mrow><mml:mrow><mml:mn>8</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>" @default.
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- W2045447183 doi "https://doi.org/10.1103/physrev.110.1076" @default.
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