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NSR database version of May 24, 2024.

Search: Author = F.Herwig

Found 18 matches.

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2024SP04      Phys.Rev.Lett. 132, 202701 (2024)

A.Spyrou, D.Mucher, P.A.Denissenkov, F.Herwig, E.C.Good, G.Balk, H.C.Berg, D.L.Bleuel, J.A.Clark, C.Dembski, P.A.DeYoung, B.Greaves, M.Guttormsen, C.Harris, A.C.Larsen, S.N.Liddick, S.Lyons, M.Markova, M.J.Mogannam, S.Nikas, J.Owens-Fryar, A.Palmisano-Kyle, G.Perdikakis, F.Pogliano, M.Quintieri, A.L.Richard, D.Santiago-Gonzalez, G.Savard, M.K.Smith, A.Sweet, A.Tsantiri, M.Wiedeking

First Study of the 139Ba(n, γ)140Ba Reaction to Constrain the Conditions for the Astrophysical i Process

RADIOACTIVITY 140Cs(β-); measured decay products, Eγ, Iγ; deduced γ-ray energies, γ-ray strength functions, nuclear level density, astrophysical reaction rates. Comparison with TALYS calculations. β-Oslo method, the CARIBU facility at Argonne National Laboratory.

doi: 10.1103/PhysRevLett.132.202701
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2024VA02      Phys.Rev.Lett. 132, 052701 (2024)

N.Vassh, X.Wang, M.Lariviere, T.Sprouse, M.R.Mumpower, R.Surman, Zh.Liu, G.C.McLaughlin, P.Denissenkov, F.Herwig

Thallium-208: A Beacon of In Situ Neutron Capture Nucleosynthesis

doi: 10.1103/PhysRevLett.132.052701
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2023DI06      Eur.Phys.J. A 59, 105 (2023)

I.Dillmann, O.Kester, R.Baartman, A.Chen, T.Junginger, F.Herwig, D.Kaltchev, A.Lennarz, T.Planche, C.Ruiz, N.Vassh

Measuring neutron capture cross sections of radioactive nuclei

doi: 10.1140/epja/s10050-023-01012-9
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2022SC17      J.Phys.(London) G49, 110502 (2022)

H.Schatz, A.D.Becerril Reyes, A.Best, E.F.Brown, K.Chatziioannou, K.A.Chipps, C.M.Deibel, R.Ezzeddine, D.K.Galloway, C.J.Hansen, F.Herwig, A.P.Ji, M.Lugaro, Z.Meisel, D.Norman, J.S.Read, L.F.Roberts, A.Spyrou, I.Tews, F.X.Timmes, C.Travaglio, N.Vassh, C.Abia, P.Adsley, S.Agarwal, M.Aliotta, W.Aoki, A.Arcones, A.Aryan, A.Bandyopadhyay, A.Banu, D.W.Bardayan, J.Barnes, A.Bauswein, T.C.Beers, J.Bishop, T.Boztepe, B.Cote, M.E.Caplan, A.E.Champagne, J.A.Clark, M.Couder, A.Couture, S.E.de Mink, S.Debnath, R.J.deBoer, J.den Hartogh, P.Denissenkov, V.Dexheimer, I.Dillmann, J.E.Escher, M.A.Famiano, R.Farmer, R.Fisher, C.Frohlich, A.Frebel, C.Fryer, G.Fuller, A.K.Ganguly, S.Ghosh, B.K.Gibson, T.Gorda, K.N.Gourgouliatos, V.Graber, M.Gupta, W.C.Haxton, A.Heger, W.R.Hix, W.C.G.Ho, E.M.Holmbeck, A.A.Hood, S.Huth, G.Imbriani, R.G.Izzard, R.Jain, H.Jayatissa, Z.Johnston, T.Kajino, A.Kankainen, G.G.Kiss, A.Kwiatkowski, M.La Cognata, A.M.Laird, L.Lamia, P.Landry, E.Laplace, K.D.Launey, D.Leahy, G.Leckenby, A.Lennarz, B.Longfellow, A.E.Lovell, W.G.Lynch, S.M.Lyons, K.Maeda, E.Masha, C.Matei, J.Merc, B.Messer, F.Montes, A.Mukherjee, M.R.Mumpower, D.Neto, B.Nevins, W.G.Newton, L.Q.Nguyen, K.Nishikawa, N.Nishimura, F.M.Nunes, E.O'Connor, B.W.O'Shea, W.-J.Ong, S.D.Pain, M.A.Pajkos, M.Pignatari, R.G.Pizzone, V.M.Placco, T.Plewa, B.Pritychenko, A.Psaltis, D.Puentes, Y.-Z.Qian, D.Radice, D.Rapagnani, B.M.Rebeiro, R.Reifarth, A.L.Richard, N.Rijal, I.U.Roederer, J.S.Rojo, J.S K, Y.Saito, A.Schwenk, M.L.Sergi, R.S.Sidhu, A.Simon, T.Sivarani, A.Skuladottir, M.S.Smith, A.Spiridon, T.M.Sprouse, S.Starrfield, A.W.Steiner, F.Strieder, I.Sultana, R.Surman, T.Szucs, A.Tawfik, F.Thielemann, L.Trache, R.Trappitsch, M.B.Tsang, A.Tumino, S.Upadhyayula, J.O.Valle Martinez, M.Van der Swaelmen, C.Viscasillas Vazquez, A.Watts, B.Wehmeyer, M.Wiescher, C.Wrede, J.Yoon, R.G.T.Zegers, M.A.Zermane, M.Zingale, the Horizon 2020 Collaborations

Horizons: nuclear astrophysics in the 2020s and beyond

doi: https://dx.doi.org/10.1088/1361-6471/ac8890
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2021DE13      Phys.Rev. C 103, 055815 (2021)

R.J.deBoer, O.Clarkson, A.J.Couture, J.Gorres, F.Herwig, I.Lombardo, P.Scholz, M.Wiescher

19F(p, γ)20Ne and 19F(p, αγ)16O reaction rates and their effect on calcium production in Population III stars from hot CNO breakout

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, Γp, Γα, Γγ. 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, Γp, Γγ, Γα, Γtotal. 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, mCl(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, Γp, Γγ, 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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