M. Matney

Measurement of the Mo 92 ( p , γ ) Tc 93 reaction cross section for the γ -process nucleosynthesis

A. Simon, R. Kelmar, J. P. McDonaugh, James E. O'Reilly et autres

us (code pays fourni par la source)

Total cross section of N 14 + n from 0.1 to 12 MeV

A. Junghans, R. Arquette, D. Bemmerer, A. Best et autres

The reaction $^{14}$N$(n,p)^{14}$C is one of the main neutron poisons during $s$-process nucleosynthesis. In addition, the reaction provides insight into the yields of atmospheric nuclear weapon testing. Because of their high level of sensitivity, total neutron cross sections provide a great deal …

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First results from measurements of capture reactions on Sn and Pd for the γ-process using HECTOR

John McDonaugh, A. Simón, Colin N. Jones, J. Koros et autres

The formation of p-nuclei and their abundances are an important and ongoing study in nuclear astrophysical measurements. To understand and constrain theoretical models on the abundances of p-nuclei, further measurements of reactions on relevant nuclei and important branching points of the γ …

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Constraining (n,γ) cross sections via surrogate measurements with hyperion

J. Koros, A. Simon, J. T. Harke, R. O. Hughes et autres

Indirect measurement techniques, such as the surrogate method, are necessary to constrain cross sections and reaction rates that are inaccessible for direct measurement. The surrogate method uses an alternate reaction channel to populate a nucleus of interest, and combines resulting experimental data …

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Commissioning of the neutron irradiation station at the University of Notre Dame

M. Matney, A. Simon, D. Robertson, Khachatur V. Manukyan et autres

Strength measurements of the E R lab = 647 and 1842 keV resonances in the Ca 40 ( p , γ ) Sc 41 reaction and their relevance in novae nucleosynthesis

R. S. Sidhu, R. J. deBoer, J. Görres, M. Wiescher et autres

Here we report on the direct measurement of the resonance strengths of the E R lab = 647 keV and 1842 keV resonances in the Ca 40 ( p , γ ) Sc 41 reaction. At novae temperatures, 0.2 < T 9 …

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First experiments with a graphite moderator for the Neutron Target Demonstator (NTD)

R. Reifarth, USDOE National Nuclear Security Administration (NNSA), Isaac Bos, Olivia Cantrell et autres

This report is a major update of the report ”Cubical moderators for the Neutron Target Demonstator (NTD), LA-UR-23-33899”. It serves as a documentation of milestone M1 of the LDRD project 20240004DR.

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Comprehensive study of d + Li 6 via observing simultaneous outgoing neutrons, γ rays, and charged particles

S. N. Paneru, Hye Young Lee, C. J. Prokop, S. A. Kuvin et autres

Deuteron-induced reactions on $^{6}\mathrm{Li}$ are important for nuclear structure studies and nuclear applications. A new experimental effort was dedicated to improve incomplete partial cross sections and the angular distribution information for $d+^{6}\mathrm{Li}$ reactions and to address the inconsistencies between various $R$-matrix evaluations …

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Light response of poly(ethylene 2,6-naphthalate) to neutrons

B. Hackett, R. J. deBoer, Y. Efremenko, M. Febbraro et autres

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Energy, strength, and α width measurements of E c.m. = 1323 and 1487 keV resonances in N 15 ( α , γ ) F 19

R. Fang, J. Görres, R. J. deBoer, S. Moylan et autres

The $^{15}\mathrm{N}$($\ensuremath{\alpha},\ensuremath{\gamma}$)$^{19}\mathrm{F}$ reaction produces $^{19}\mathrm{F}$ in asymptotic giant branch (AGB) stars, where the low energy tails of two resonances at ${E}_{\mathrm{c}.\mathrm{m}.}=1323\ifmmode\pm\else\textpm\fi{}2$ and $1487\ifmmode\pm\else\textpm\fi{}1.7\phantom{\rule{0.16em}{0ex}}\mathrm{keV}$ are estimated to contribute about 30% of the total reaction rate in these environments. However, recent measurements have shown …

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Strength measurement of the E α lab = 830 keV resonance in the Ne 22 ( α , n ) Mg 25 reaction using a stilbene detector

R. J. deBoer, J. Görres, R. Fang, M. Febbraro et autres

The ${}^{22}$Ne + $\ensuremath{\alpha}$ reaction has significant impact at the end of the core helium burning phase in red giant stars. Radiative $\ensuremath{\alpha}$ capture, ($\ensuremath{\alpha}$,$\ensuremath{\gamma}$), heats the plasma while the ($\ensuremath{\alpha}$,$n$) reaction provides neutrons for the weak $s$ process; their interplay determines …

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Energy, strength, and alpha width measurements of $E_{\rm{c.m.}} = 1323$ and $1487$ keV resonances in $^{15}$N($α,γ$)$^{19}$F

R. Fang, J. Görres, R. J. deBoer, S. Moylan et autres

The $^{15}$N($α,γ$)$^{19}$F reaction produces $^{19}$F in asymptotic giant branch (AGB) stars, where the low energy tails of two resonances at $E_{\rm{c.m.}} = 1323 \pm 2$ and $1487 \pm 1.7$ keV are estimated to contribute about $30\%$ of the total reaction rate in …