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- W1674052007 abstract "The electron capture decay scheme of the 8.6ifmmodepmelsetextpmfi{}0.1-h $^{250}mathrm{Es}$ isomer was investigated with high-resolution $ensuremath{gamma}$-ray and $ensuremath{beta}$-ray spectrometers and with two parameter coincidence analysis. Mass-separated samples of $^{250}mathrm{Es}$ produced by $^{249}mathrm{Bk}(ensuremath{alpha}, 3n)$ and $^{249}mathrm{Cf}(d, n)$ reactions were used for these measurements. We propose a decay scheme involving 32 transitions and 16 levels in $^{250}mathrm{Cf}$. In addition to the ground state band, six rotational bands have been identified. The energies (keV) and $Kensuremath{pi}$ values of the bandheads are: 871.67 (2-), 1031.80 (2+), 1255.49 (4-), 1396.18 (5-), 1478.47 (5-), and 1499.62 (6-). The $logmathrm{ft}$ values of the electron capture transitions to the four highest bands were deduced and these were used to elucidate the principal two-quasiparticle components of these states. The $Kensuremath{pi}=2ensuremath{-} mathrm{and} 2+$ bands were interpreted as octupole and $ensuremath{gamma}$-vibrational bands. The following two-quasiparticle configurations have been assigned: 1255.49 (4-), {$n[734]frac{9}{2ensuremath{-}}; n[620]frac{1}{2+}$}; 1396.18 (5-), {$p[633]frac{7}{2+}; p[521]frac{3}{2ensuremath{-}}$}; 1478.47 (5-), {$n[734]frac{9}{2ensuremath{-}}; n[620]frac{1}{2+}$}; and 1499.62 (6-), {$n[734]frac{9}{2ensuremath{-}}; n[622]frac{3}{2+}$}. The ground state of the 8.6-h $^{250}mathrm{Es}$ isomer has been given a spin-parity assignment of 6+ with the configuration {$n[734]frac{9}{2ensuremath{-}}; p[521]frac{3}{2ensuremath{-}}$}. $mathrm{KLL}$ Auger energies and intensities for $Z=98$ are reported. A $K$ fluorescence yield of 0.976ifmmodepmelsetextpmfi{}0.005 is obtained for Cf.RADIOACTIVITY $^{250}mathrm{Es}$ [from $^{249}mathrm{Bk}(ensuremath{alpha}, 3n)$ and $^{249}mathrm{Cf}(d, n)$; measured ${T}_{frac{1}{2}}$, ${E}_{ensuremath{gamma}}$, ${I}_{ensuremath{gamma}}$, ${E}_{mathrm{ce}}$, ${I}_{mathrm{ce}}$, $ensuremath{gamma}ensuremath{gamma}$-coin. $^{250}mathrm{Cf}$ deduced levels, $logmathrm{ft}$ (EC), $ensuremath{gamma}$ multipolarity, $I$, $ensuremath{pi}$, four two-quasiparticle states, two vibrational states. Mass-separated $^{250}mathrm{Es}$. Toroidal $ensuremath{beta}$ spectrometer at 0.11% resolution (FWHM)." @default.
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- W1674052007 date "1977-02-01" @default.
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- W1674052007 title "Two-quasiparticle states in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant=normal>Cf</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>250</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>populated by electron capture decay of 8.6-h<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi …" @default.
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- W1674052007 doi "https://doi.org/10.1103/physrevc.15.760" @default.
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