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- W2263227194 abstract "The resonant-neutron-capture $ensuremath{gamma}$-ray spectra for 28 resonances below 600-eV neutron energy are measured in $^{238}mathrm{U}(n,ensuremath{gamma})^{239}mathrm{U}$ with improved neutron and $ensuremath{gamma}$-ray energy resolution to allow an accurate test of the predictions of the statistical model of neutron capture. No convincing departures from these predictions are observed. The variation over 23 $S$-wave neutron resonances of the $ensuremath{gamma}$-ray transition probabilities to 15 final states is consistent with the Porter-Thomas distribution for both $E1$ and $M1$ multipoles. There is also no statistically significant correlation between the different decay modes of the neutron resonances. A large correlation coefficient of + 0.81 is observed between the partial radiative widths of the 3991- and 3982- keV $ensuremath{gamma}$ rays. This result, however, is not in violation of statistical independence for a sample size of 15 $ensuremath{gamma}$ rays. The $E1$ and $M1$ $ensuremath{gamma}$-ray strength functions are (2.6 ifmmodepmelsetextpmfi{} 0.4) ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}3}$ and (8.1 ifmmodepmelsetextpmfi{} 1.6) ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}3}$, respectively, compared to 3 ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}3}$ and 4 ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}3}$ listed by Bartholomew as the median values of all nuclei. Three of the weaker resonances at 10.2, 89.5, and 263 eV are assigned to $P$-wave capture. The neutron binding energy is measured to be 4806.7 ifmmodepmelsetextpmfi{} 2.0 keV, which is 5.0 keV higher than the previously accepted value. Previously unobserved $ensuremath{gamma}$-ray transitions are reported." @default.
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- W2263227194 date "1971-09-01" @default.
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- W2263227194 title "Distribution of Partial Radiation Widths in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant=normal>U</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>238</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow><mml:mo>(</mml:mo><mml:mi>n</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo>)</mml:mo><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant=normal>U</mml:…" @default.
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- W2263227194 doi "https://doi.org/10.1103/physrevc.4.900" @default.
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