Nuclear Science References (NSR)

NUCLEAR REACTIONS ¹⁹F(p, αγ)¹⁶O, E(cm)<865 keV; ¹⁹F(p, p), E(cm)=0.5-0.9 MeV; analyzed and evaluated available experimental data for σ(E, θ), differential S factors, angular distributions, R-matrix fit to secondary γ-ray data, secondary on-resonance γ-ray angular distributions. ¹⁶O; deduced levels, resonance energies, J, π, Γ_p, Γ_α, Γ_γ. ¹⁹F(p, γ)²⁰Ne, E(cm)<0.8 MeV; analyzed and evaluated experimental data for S factor. ²⁰Ne; deduced levels, resonance energies, J, π, resonance strengths, Γ_p, Γ_γ, Γ_α, Γ_total. ¹⁹F(p, γ)²⁰Ne, ¹⁹F(p, αγ)¹⁶O, T=0.01-1 GK; recommended astrophysical reaction rates, and compared with compilation in NACRE database. Phenomenological R-matrix approach. Discussed astrophysical impact of the evaluated data, and recommended further measurements of importance, for example proton transfer studies needed to determine the proton ANCs of proton bound states. Relevance to the presence of Ca in Fe-poor stars in hot CNO breakout H-burning nucleosynthesis.

doi: 10.1103/PhysRevC.103.055815
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2021OT02 Phys.Rev. C 104, 055806 (2021)

S.Ota, G.Christian, W.N.Catford, G.Lotay, M.Pignatari, U.Battino, E.A.Bennett, S.Dede, D.T.Doherty, S.Hallam, F.Herwig, J.Hooker, C.Hunt, H.Jayatissa, A.Matta, M.Moukaddam, E.Rao, G.V.Rogachev, A.Saastamoinen, D.Scriven, J.A.Tostevin, S.Upadhyayula, R.Wilkinson

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

NUCLEAR REACTIONS ⁶Li(²²Ne, d)²⁶Mg, ⁶Li(²²Na, t)²⁵Mg, E=154 MeV; ²H(²²Ne, p)²³Ne, E not given; measured reaction products, E(d), I(d), E(p), I(p), Eγ, Iγ, ²⁶Mg and ²⁵Mg recoils, (²⁶Mg)γ-coin, (²⁵Mg)γ-coin, (particle)(particle)-coin, σ(θ) using TIARA Si detector array of two sets of Si detectors, 'Hyball' and 'Barrel', MDM high-resolution and broad range magnetic spectrometer, and array of four HPGe detectors at the K150 cyclotron of Texas A and M University. ²³Ne, ²⁵Mg, ²⁶Mg; deduced levels, J, π, resonances, resonances in the Gamow window of ²²Ne(α, n)²⁵Mg reaction, spectroscopic factors, α-spectroscopic factors for ²⁶Mg, resonance strengths, impact of ²²Ne+α resonances on s-process nucleosynthesis; comparison of σ(θ) data with DWBA calculations using FRESCO code. Comparison with previous experimental results. ²²Ne(α, n), (α, γ); calculated s-process overproduction factors in stars 3 and 5 times the mass of the sun for A=60-210 isotopes.

doi: 10.1103/PhysRevC.104.055806
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2020RI06 Phys.Rev. C 102, 025801 (2020)

W.A.Richter, B.A.Brown, R.Longland, C.Wrede, P.Denissenkov, C.Fry, F.Herwig, D.Kurtulgil, M.Pignatari, R.Reifarth

Shell-model studies of the astrophysical rp-process reactions ³⁴S(p, γ)³⁵Cl and ^{34g, m}Cl(p, γ)³⁵Ar

NUCLEAR REACTIONS ³⁴S(³He, d)³⁵Cl, E=20 MeV; calculated spectroscopic factors for levels in ³⁵Cl up to 7.4 MeV using shell model, and compared with experimental values. ³⁴S(p, γ)³⁵Cl, ^34,34mCl(p, γ)³⁵Ar, E not given; calculated levels, resonances, J, π, spectroscopic factors, Γ_p, Γ_γ, resonance strengths, thermonuclear reaction rates; discussed impact on predicted ³⁴S/³²S isotopic ratio for presolar nova grains. Comparison with experimental data. Shell-model approach, with uncertainties estimated using a Monte Carlo method.

doi: 10.1103/PhysRevC.102.025801
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2018DE16 J.Phys.(London) G45, 055203 (2018)

P.Denissenkov, G.Perdikakis, F.Herwig, H.Schatz, C.Ritter, M.Pignatari, S.Jones, S.Nikas, A.Spyrou

The impact of (n, γ) reaction rate uncertainties of unstable isotopes near N = 50 on the i-process nucleosynthesis in He-shell flash white dwarfs

NUCLEAR REACTIONS ^87,88,89Kr, ^85,86Br, ⁸⁹Rb, ^89,92Sr(n, γ), E ∼ 30 keV; calculated mass fractions, astrophysical abundances of Rb, Sr, Y and Zr; deduced an impact of the uncertainties in the (n, γ) reaction rates on Monte Carlo simulation.

doi: 10.1088/1361-6471/aabb6e
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2017AR04 Prog.Part.Nucl.Phys. 94, 1 (2017)

A.Arcones, D.W.Bardayan, T.C.Beers, L.A.Bernstein, J.C.Blackmon, B.Messer, B.A.Brown, E.F.Brown, C.R.Brune, A.E.Champagne, A.Chieffi, A.J.Couture, P.Danielewicz, R.Diehl, M.El Eid, J.E.Escher, B.D.Fields, C.Frohlich, F.Herwig, W.R.Hix, C.Iliadis, W.G.Lynch, G.C.McLaughlin, B.S.Meyer, A.Mezzacappa, F.Nunes, B.W.O'Shea, M.Prakash, B.Pritychenko, S.Reddy, E.Rehm, G.Rogachev, R.E.Rutledge, H.Schatz, M.S.Smith, I.H.Stairs, A.W.Steiner, T.E.Strohmayer, F.X.Timmes, D.M.Townsley, M.Wiescher, R.G.T.Zegers, M.Zingale

White paper on nuclear astrophysics and low energy nuclear physics Part 1: Nuclear astrophysics

doi: 10.1016/j.ppnp.2016.12.003
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2017PI16 Geochim.Cosmochim.Act. 221, 37 (2017)

M.Pignatari, P.Hoppe, R.Trappitsch, C.Fryer, F.X.Timmes, F.Herwig, R.Hirschi

The neutron capture process in the He shell in core-collapse supernovae: Presolar silicon carbide grains as a diagnostic tool for nuclear astrophysics

ATOMIC MASSES ^90,96Zr, ⁹⁰Sr, ^95,96,97,100Mo; analyzed isotopic abundances in carbon-rich presolar grains; deduced parameters of supernova models.

doi: 10.1016/j.gca.2017.06.005
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2010BE40 J.Phys.:Conf.Ser. 202, 012023 (2010)

M.E.Bennett, R.Hirschi, M.Pignatari, S.Diehl, C.Fryer, F.Herwig, A.Hungerford, G.Magkotsios, G.Rockefeller, F.Timmes, M.Wiescher, P.Young

The effect of ¹²C + ¹²C rate uncertainties on s-process yields

NUCLEAR REACTIONS ¹²C(¹²C, p), (¹²C, α), E≈50-100 keV;²³Na(p, α), E≈50-100 keV; calculated ¹²C burning rates. A≈12-96 calculated isotope yields based on these burning rates in massive stars for s-process.

doi: 10.1088/1742-6596/202/1/012023
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2010PI15 Astrophys.J. 710, 1557 (2010)

M.Pignatari, R.Gallino, M.Heil, M.Wiescher, F.Kappeler, F.Herwig, S.Bisterzo

The Weak s-Process in Massive Stars and its Dependence on the Neutron Capture Cross Sections

NUCLEAR REACTIONS ⁷⁴Ge, ⁷⁵As, ⁷⁸Se, ³⁶S, ⁸⁰Kr(n, γ), E ∼ 30 keV; analyzed available data; deduced Maxwellian averaged σ.

doi: 10.1088/0004-637x/710/2/1557
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2006HE09 Phys.Rev. C 73, 025802 (2006)

F.Herwig, S.M.Austin, J.C.Lattanzio

Nuclear reaction rate uncertainties and astrophysical modeling: Carbon yields from low-mass giants

NUCLEAR REACTIONS ¹⁴N(p, γ), ¹²C(α, γ), E=low; analyzed astrophysical reaction rates, uncertainties.

doi: 10.1103/PhysRevC.73.025802
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2005JO15 Nucl.Phys. A758, 221c (2005)

J.A.Johnson, F.Herwig, T.C.Beers, N.Christlieb

Nitrogen in the Early Universe

doi: 10.1016/j.nuclphysa.2005.05.174
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2004HE33 Astrophys.J. 613, L73 (2004)

F.Herwig, S.M.Austin

Nuclear reaction rates and carbon star formation

NUCLEAR REACTIONS ¹⁴N(p, γ), E=low; analyzed reaction rates, uncertainties. Astrophysical implications discussed.

doi: 10.1086/424872
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2001CR05 Nucl.Phys. A688, 217c (2001)

S.Cristallo, O.Straniero, R.Gallino, F.Herwig, A.Chieffi, M.Limongi, M.Busso

The Formation of the ¹³C Pocket in Asymptotic Giant Branch Stars and Related Nucleosynthesis

doi: 10.1016/S0375-9474(01)00701-1
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2001HE21 Nucl.Phys. A688, 221c (2001)

F.Herwig, N.Langer

Convective Proton and ³He Ingestion into Helium Burning: Nucleosynthesis during a post-AGB thermal pulse

doi: 10.1016/S0375-9474(01)00702-3
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2001LU07 Nucl.Phys. A688, 201c (2001)

M.Lugaro, F.Herwig

Advances in s-Process Models

doi: 10.1016/S0375-9474(01)00698-4
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