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Creators/Authors contains: "Rogachev, G. V."

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Neutron-upscattering enhancement of the triple-alpha process

https://doi.org/10.1038/s41467-022-29848-7

Bishop, J. ; Parker, C. E. ; Rogachev, G. V. ; Ahn, S. ; Koshchiy, E. ; Brandenburg, K. ; Brune, C. R. ; Charity, R. J. ; Derkin, J. ; Dronchi, N. ; et al ( April 2022 , Nature Communications)

Abstract
The neutron inelastic scattering of carbon-12, populating the Hoyle state, is a reaction of interest for the triple-alpha process. The inverse process (neutron upscattering) can enhance the Hoyle state’s decay rate to the bound states of¹²C, effectively increasing the overall triple-alpha reaction rate. The cross section of this reaction is impossible to measure experimentally but has been determined here at astrophysically-relevant energies using detailed balance. Using a highly-collimated monoenergetic beam, here we measure neutrons incident on the Texas Active Target Time Projection Chamber (TexAT TPC) filled with CO₂gas, we measure the 3α-particles (arising from the decay of the Hoyle state following inelastic scattering) and a cross section is extracted. Here we show the neutron-upscattering enhancement is observed to be much smaller than previously expected. The importance of the neutron-upscattering enhancement may therefore not be significant aside from in very particular astrophysical sites (e.g. neutron star mergers).

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$({}^{6}{Li}, d)$ and $({}^{6}{Li}, t)$ reactions on ${}^{22}{Ne}$ and implications for $s$ -process nucleosynthesis

https://doi.org/10.1103/PhysRevC.104.055806

Ota, S. ; Christian, G. ; Catford, W. N. ; Lotay, G. ; Pignatari, M. ; Battino, U. ; Bennett, E. A. ; Dede, S. ; Doherty, D. T. ; Hallam, S. ; et al ( November 2021 , Physical Review C)

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Observation of $T = 3 / 2$ isobaric analog states in ${}^{9}{Be}$ using $p + {}^{8}{Li}$ resonance scattering

https://doi.org/10.1103/PhysRevC.102.014615

Hunt, C. ; Rogachev, G. V. ; Almaraz-Calderon, S. ; Aprahamian, A. ; Avila, M. ; Baby, L. T. ; Bucher, B. ; Goldberg, V. Z. ; Johnson, E. D. ; Kemper, K. W. ; et al ( July 2020 , Physical Review C)

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Measurement of $d + {}^{7}{Be}$ Cross Sections for Big-Bang Nucleosynthesis

https://doi.org/10.1103/PhysRevLett.122.182701

Rijal, N. ; Wiedenhöver, I. ; Blackmon, J. C. ; Anastasiou, M. ; Baby, L. T. ; Caussyn, D. D. ; Höflich, P. ; Kemper, K. W. ; Koshchiy, E. ; Rogachev, G. V. ( May 2019 , Physical Review Letters)

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Radiative capture reactions via indirect methods

https://doi.org/10.1103/PhysRevC.96.045811

Mukhamedzhanov, A. M. ; Rogachev, G. V. ( October 2017 , Physical Review C)

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Sub-Coulomb ${}^{3}{He}$ transfer and its use to extract three-particle asymptotic normalization coefficients

https://doi.org/10.1103/PhysRevC.97.014313

Avila, M. L. ; Baby, L. T. ; Belarge, J. ; Keeley, N. ; Kemper, K. W. ; Koshchiy, E. ; Kuchera, A. N. ; Rogachev, G. V. ; Rusek, K. ; Santiago-Gonzalez, D. ( January 2018 , Physical Review C)

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Sub-barrier fusion of weakly bound ${}^{6}{Li}$ with ${}^{58}{Ni}$

https://doi.org/10.1103/PhysRevC.96.024616

Aguilera, E. F. ; Martinez-Quiroz, E. ; Amador-Valenzuela, P. ; Lizcano, D. ; García-Flores, A. ; Kolata, J. J. ; Roberts, A. ; Rogachev, G. V. ; Peaslee, G. F. ; Guimarães, V. ; et al ( August 2017 , Physical Review C)

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New measurement of the $α$ asymptotic normalization coefficient of the ${1 / 2}^{+}$ state in ${}^{17}O$ at 6.356 MeV that dominates the ${}^{13}C (α, n) {}^{16}O$ reaction rate at temperatures relevant for the $s$ process

https://doi.org/10.1103/PhysRevC.91.048801

Avila, M. L. ; Rogachev, G. V. ; Koshchiy, E. ; Baby, L. T. ; Belarge, J. ; Kemper, K. W. ; Kuchera, A. N. ; Santiago-Gonzalez, D. ( April 2015 , Physical Review C)

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$α$ -cluster asymptotic normalization coefficients for nuclear astrophysics

https://doi.org/10.1103/PhysRevC.90.042801

Avila, M. L. ; Rogachev, G. V. ; Koshchiy, E. ; Baby, L. T. ; Belarge, J. ; Kemper, K. W. ; Kuchera, A. N. ; Santiago-Gonzalez, D. ( October 2014 , Physical Review C)

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Constraining the 6.05 MeV $0^{+}$ and 6.13 MeV $3^{-}$ Cascade Transitions in the ${}^{12}C (α, γ) {}^{16}O$ Reaction Using the Asymptotic Normalization Coefficients

https://doi.org/10.1103/PhysRevLett.114.071101

Avila, M. L. ; Rogachev, G. V. ; Koshchiy, E. ; Baby, L. T. ; Belarge, J. ; Kemper, K. W. ; Kuchera, A. N. ; Mukhamedzhanov, A. M. ; Santiago-Gonzalez, D. ; Uberseder, E. ( February 2015 , Physical Review Letters)

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