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- W1991924645 startingPage "1429" @default.
- W1991924645 abstract "Atomic-beam measurements on ${mathrm{Am}}^{241}$ have confirmed that the nuclear spin is $I=frac{5}{2}$, and have established that the electronic ground state is characterized by an angular momentum $J=frac{7}{2}$ and a Land'e splitting factor ${g}_{J}=ensuremath{-}1.9371(10)$. In addition, the magnetic-dipole and electric-quadrupole hyperfine-structure coupling constants have been found to be, respectively, $A=ifmmodepmelsetextpmfi{}17.144(8)$ Mc/sec and $B=ensuremath{mp}123.82(10)$ Mc/sec. It is hypothesized that these values arise from a state that is primarily formed from the Hund's rule term $^{8}S$ of the configuration ${(5f)}^{7}{(7s)}^{2}$. However, important contributions to the measured ${g}_{J}$, $A$, and $B$ values are shown to come from the admixture of other terms in the ground state by means of the spin-orbit interaction, and also from the excitation of $s$ electrons in the core to higher $s$ states." @default.
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- W1991924645 date "1960-11-15" @default.
- W1991924645 modified "2023-09-27" @default.
- W1991924645 title "Hyperfine Structure of Americium-241" @default.
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- W1991924645 doi "https://doi.org/10.1103/physrev.120.1429" @default.
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