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- W2945778943 abstract "Improving our understanding of the origin of the elements in the observable universe as well as the nature of the environments responsible for their production has been of paramount importance to the nuclear physics community. More than half of the isotopes of these elements are created via neutron-capture processes, and thus accurate measurements of the salient underlying nuclear physics, such as neutron-capture cross sections, masses, and $ensuremath{beta}$-decay half-lives are crucial. Of particular importance to the synthesis of isotopes in the mass range of $Aensuremath{approx}60$ to $Aensuremath{approx}90$, via the weak $s$ process, are the neutron-capture cross sections of $^{63,65}mathrm{Cu}$, where large discrepancies between measurements exist. Recent measurements have addressed these discrepancies for $^{63}mathrm{Cu}$ [Weigand et al., Phys. Rev. C 95, 015808 (2017)], but questions still remain for $^{65}mathrm{Cu}$. In this paper we report a new measurement of the $^{65}mathrm{Cu}(n,ensuremath{gamma})$ cross section performed using the Detector for Advanced Neutron Capture Experiments located at the Los Alamos Neutron Science Center of Los Alamos National Laboratory. The Maxwellian-averaged cross section (MACS) for $^{65}mathrm{Cu}(n,ensuremath{gamma})$ at $kT=30$ keV deduced from this work is ($37.0ifmmodepmelsetextpmfi{}0.{3}_{mathrm{stat}.}ifmmodepmelsetextpmfi{}3.{3}_{mathrm{sys}.}$) mb. The impact on weak $s$-process nucleosynthesis of new MACS values, calculated over the range of $kT=5$ to 100 keV, for $^{65}mathrm{Cu}$, combined with the updated MACS for $^{63}mathrm{Cu}$ [Weigand et al., Phys. Rev. C 95, 015808 (2017)] and $^{63}mathrm{Ni}$ [Weigand et al., Phys. Rev. C 92, 045810 (2015)], were investigated. Results of this investigation show an increase of predicted nucleosynthesis yields of elements of Zn to Zr by as much as 20% ." @default.
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- W2945778943 date "2019-05-20" @default.
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- W2945778943 title "Measurement of the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mmultiscripts><mml:mi>Cu</mml:mi><mml:mprescripts /><mml:none /><mml:mn>65</mml:mn></mml:mmultiscripts><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:math> cross section using the Detector for Advanced Neutron Capture Experiments at LANL" @default.
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- W2945778943 doi "https://doi.org/10.1103/physrevc.99.055809" @default.
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