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NSR database version of April 27, 2024.

Search: Author = A.Sieverding

Found 7 matches.

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2023LA06      J.Phys.(London) G50, 033002 (2023)

A.M.Laird, M.Lugaro, A.Kankainen, P.Adsley, D.W.Bardayan, H.E.Brinkman, B.Cote, C.M.Deibel, R.Diehl, F.Hammache, J.W.den Hartogh, J.Jose, D.Kurtulgil, C.Lederer-Woods, G.Lotay, G.Meynet, S.Palmerini, M.Pignatari, R.Reifarth, N.de Sereville, A.Sieverding, R.J.Stancliffe, T.C.L.Trueman, T.Lawson, J.S.Vink, C.Massimi, A.Mengoni

Progress on nuclear reaction rates affecting the stellar production of ²⁶Al

NUCLEAR REACTIONS ²⁵Mg, ^25,26Al(p, γ), ²⁶Al(n, p), (n, α), ²⁵Mg(α, n), ²³Na(α, p), ^24,25Mg(n, γ), E<300 KeV; analyzed available data; deduced σ, reaction rates, resonance parameters.

doi: 10.1088/1361-6471/ac9cf8
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2023SI23      Astrophys.J. 957, L25 (2023)

A.Sieverding, D.Kresse, H.-T.Janka

Production of ⁴⁴Ti and Iron-group Nuclei in the Ejecta of 3D Neutrino-driven Supernovae

ATOMIC MASSES ⁴⁴Ti, ⁵⁶Ni; calculated nucleosynthesis yields from a self-consistent three-dimensional supernova (SN).

doi: 10.3847/2041-8213/ad045b
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2022SI17      Phys.Rev. C 106, 015803 (2022)

A.Sieverding, J.S.Randhawa, D.Zetterberg, R.J.deBoer, T.Ahn, R.Mancino, G.Martinez-Pinedo, W.R.Hix

Role of low-lying resonances for the ¹⁰Be(p, α)⁷Li reaction rate and implications for the formation of the Solar System

NUCLEAR REACTIONS ¹⁰Be(p, α), (α, n), E not given; ¹⁰Be(ν, e^-), E=2.8-10 MeV; analyzed reaction rates, σ; deduced influence on the content of ¹⁰Be in supernovae environment. ¹⁰Be(p, α), E<1.5 MeV; analyzed reaction rate, experimental data on resonance in ¹¹B at 193 keV, ; deduced reaction rate, astrophysical S-factor. Showed that, with the new reaction rate, a low-mass corecollapse supernovae is unlikely to produce enough ¹⁰Be to explain the observed ¹⁰Be/⁹Be ratio in meteorites. Comparison to data from JINA-REACLIB.

doi: 10.1103/PhysRevC.106.015803
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2021GA15      Phys.Rev.Lett. 126, 152701 (2021)

B.Gao, S.Giraud, K.A.Li, A.Sieverding, R.G.T.Zegers, X.Tang, J.Ash, Y.Ayyad-Limonge, D.Bazin, S.Biswas, B.A.Brown, J.Chen, M.DeNudt, P.Farris, J.M.Gabler, A.Gade, T.Ginter, M.Grinder, A.Heger, C.Hultquist, A.M.Hill, H.Iwasaki, E.Kwan, J.Li, B.Longfellow, C.Maher, F.Ndayisabye, S.Noji, J.Pereira, C.Qi, J.Rebenstock, A.Revel, D.Rhodes, A.Sanchez, J.Schmitt, C.Sumithrarachchi, B.H.Sun, D.Weisshaar

New ⁵⁹Fe Stellar Decay Rate with Implications for the ⁶⁰Fe Radioactivity in Massive Stars

NUCLEAR REACTIONS ⁵⁹Co(t, ³He)⁵⁹Fe, E=115 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, σ(θ), B(GT), β-decay rates. Comparison with stellar evolution calculations.

doi: 10.1103/PhysRevLett.126.152701
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2020RE04      Phys.Rev. C 101, 025803 (2020)

M.P.Reiter, S.Ayet San Andres, S.Nikas, J.Lippuner, C.Andreoiu, C.Babcock, B.R.Barquest, J.Bollig, T.Brunner, T.Dickel, J.Dilling, I.Dillmann, E.Dunling, G.Gwinner, L.Graham, C.Hornung, R.Klawitter, B.Kootte, A.A.Kwiatkowski, Y.Lan, D.Lascar, K.G.Leach, E.Leistenschneider, G.Martinez-Pinedo, J.E.McKay, S.F.Paul, W.R.Plass, L.Roberts, H.Schatz, C.Scheidenberger, A.Sieverding, R.Steinbrugge, R.Thompson, M.E.Wieser, C.Will, D.Welch

Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r-process abundance peak in neutron-star merger calculations

ATOMIC MASSES ^{80,81,82,83,84,85}Ga; measured time-of-flight spectra and mass excesses using the Ion Guide Laser Ion Source (IG-LIS) and Multiple-Reflection Time-of-Flight Mass-Spectrometer and isobar separator (MR-TOF-MS) at TRIUMF-TITAN facility; deduced solar r-process abundances for A=70-140. Comparison with AME-2016 values. Systematics of experimental and theoretical S(2n) values for Z=30-33, N=46-57 isotopes.

doi: 10.1103/PhysRevC.101.025803
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2018XI04      Phys.Lett. B 781, 358 (2018)

Y.M.Xing, K.A.Li, Y.H.Zhang, X.H.Zhou, M.Wang, Yu.A.Litvinov, K.Blaum, S.Wanajo, S.Kubono, G.Martinez-Pinedo, A.Sieverding, R.J.Chen, P.Shuai, C.Y.Fu, X.L.Yan, W.J.Huang, X.Xu, X.D.Tang, H.S.Xu, T.Bao, X.C.Chen, B.S.Gao, J.J.He, Y.H.Lam, H.F.Li, J.H.Liu, X.W.Ma, R.S.Mao, M.Si, M.Z.Sun, X.L.Tu, Q.Wang, J.C.Yang, Y.J.Yuan, Q.Zeng, P.Zhang, X.Zhou, W.L.Zhan, S.Litvinov, G.Audi, T.Uesaka, Y.Yamaguchi, T.Yamaguchi, A.Ozawa, C.Frohlich, T.Rauscher, F.-K.Thielemann, B.H.Sun, Y.Sun, A.C.Dai, F.R.Xu

Mass measurements of neutron-deficient Y, Zr, and Nb isotopes and their impact on rp and νp nucleosynthesis processes

ATOMIC MASSES ^78,79Y, ^80,81Zr, ^82,83,84Nb, ⁸⁴Mo; measured revolution time spectrum; deduced mass excess values and proton separation energies. Comparison with available data.

doi: 10.1016/j.physletb.2018.04.009
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2017MA16      Acta Phys.Pol. B48, 641 (2017)

T.Marketin, A.Sieverding, M.-R.Wu, N.Paar, G.Martinez-Pinedo

Microscopic Calculations of β-decay Rates for r-process

COMPILATION Z=8-110; compiled contribution of first-forbidden β-decay of neutron-rich nuclei to their total β-decay rate, T_1/2

RADIOACTIVITY Z=8-110(β^-), (β⁺); calculated T_1/2, β-delayed neutron multiplicity using relativistic Hartree-Bogoliubov model with spherical symmetry and D3C parameter set; deduced ratio calculated to experimental T_1/2 vs experimental T_1/2.

doi: 10.5506/APhysPolB.48.641
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