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NSR database version of April 11, 2024.

Search: Author = M.Wiescher

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2024DE04      Phys.Rev.Lett. 132, 062702 (2024)

R.J.deBoer, M.Febbraro, D.W.Bardayan, C.Boomershine, K.Brandenburg, C.Brune, S.Coil, M.Couder, J.Derkin, S.Dede, R.Fang, A.Fritsch, A.Gula, Gy.Gyurky, B.Hackett, G.Hamad, Y.Jones-Alberty, R.Kelmar, K.Manukyan, M.Matney, J.McDonaugh, Z.Meisel, S.Moylan, J.Nattress, D.Odell, P.O'Malley, M.W.Paris, D.Robertson, Shahina, N.Singh, K.Smith, M.S.Smith, E.Stech, W.Tan, M.Wiescher

Measurement of the 13C(α, n0)16O Differential Cross Section from 0.8 to 6.5 MeV

NUCLEAR REACTIONS 13C(α, n), E=0.8-6.5 MeV; measured reaction products, En, IN; deduced σ(θ), σ, S-factor. Comparison with available data, R-matrix results from ENDF/B-VIII.0 library. The Oak Ridge National Laboratory Deuterated Spectroscopic Array (ODeSA), 5 MV Stable ion Accelerator for Nuclear Astrophysics, the University of Notre Dame Nuclear Science Laboratory.

doi: 10.1103/PhysRevLett.132.062702
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2023BO19      Phys.Rev. C 108, 035809 (2023)

T.C.Borgwardt, R.J.deBoer, A.Boeltzig, M.Couder, J.Gorres, Au.Gula, M.Hanhardt, K.V.Manukyan, T.Kadlecek, D.Robertson, F.Strieder, M.Wiescher

Deep underground measurement of 11B(α, n)14N

doi: 10.1103/PhysRevC.108.035809
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Data from this article have been entered in the XUNDL database. For more information, click here.


2023BR13      Phys.Rev. C 108, L061601 (2023)

K.Brandenburg, G.Hamad, Z.Meisel, C.R.Brune, D.E.Carter, R.J.deBoer, J.Derkin, C.Feathers, D.C.Ingram, Y.Jones-Alberty, B.Kenady, T.N.Massey, M.Saxena, D.Soltesz, S.K.Subedi, A.V.Voinov, J.Warren, M.Wiescher

Measurements of the 13C(α, n)16O cross section up to Eα=8 MeV

doi: 10.1103/PhysRevC.108.L061601
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2023GU04      Phys.Rev. C 107, 025805 (2023)

A.Gula, R.J.deBoer, S.Aguilar, J.Arroyo, C.Boomershine, B.Frentz, J.Gorres, S.Henderson, R.Kelmar, S.McGuinness, K.V.Manukyan, S.Moylan, D.Robertson, C.Seymour, Shahina, E.Stech, W.Tan, J.Wilkinson, M.Wiescher

10B + α reactions at low energies

NUCLEAR REACTIONS 10B(α, p), (α, d), E(cm)=186-1430 keV; measured Ep, Ip, deuteron spectrum; deduced σ(θ) for (α, p0), (α, p1), (α, p2), (α, p3) and (α, d) channels, resonances, astrophysical reaction rate (T=0.01-2 GK), S-factor. 10B(α, α), (α, n), (α, p), (α, d); analyzed present and previous experimental data for σ(θ) distributions by R-matrix formalism using AZURE2 code. 10B(α, n), E(cm)=0.21-1.42 MeV; deduced astrophysical reaction rate (T=0.01-2 GK). 14N; deduced resonances, J, π, decay widths. Comparison to previous experimental data. Target surrounded by 2 silicon surface barrier detectors (SSBD) detectors at Stable ion Accelerator for Nuclear Astrophysics (Univ. Notre Dame).

doi: 10.1103/PhysRevC.107.025805
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2023JA13      Astrophys.J. 955, 51 (2023)

R.Jain, E.F.Brown, H.Schatz, A.V.Afanasjev, M.Beard, L.R.Gasques, S.S.Gupta, G.W.Hitt, W.R.Hix, R.Lau, P.Moller, W.J.Ong, M.Wiescher, Y.Xu

Impact of Pycnonuclear Fusion Uncertainties on the Cooling of Accreting Neutron Star Crusts

NUCLEAR REACTIONS 40Mg(40Mg, X)80Cr, 44Mg(40Mg, X)84Cr, 44Mg(44Mg, X)88Cr, 44Mg(38Ne, X)82Ti, 40Mg(38Ne, X)78Ti, 32Ne(32Ne, X)64Ca, 32Ne(30Ne, X)62Ca, 30Ne(30Ne, X)60Ca, 40Mg(24O, X), E not given; calculated abundances, pycnonuclear fusion rates using the reaction network with the thermal evolution code dStar. 56Fe; deduced impact of uncertainties on the depth at which nuclear heat is deposited although the total heating remains constant.

doi: 10.3847/1538-4357/acebc4
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2023KE11      Phys.Rev. C 108, 035805 (2023)

K-U.Kettner, H.W.Becker, C.R.Brune, R.J.deBoer, J.Gorres, D.Odell, D.Rogalla, M.Wiescher

Absolute cross section of the 12C(p, γ)13N reaction

doi: 10.1103/PhysRevC.108.035805
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2023SC08      Phys.Rev. C 107, 065806 (2023)

P.Scholz, R.J.deBoer, J.Gorres, A.Gula, R.Kelmar, K.Manukyan, E.Stech, W.Tan, M.Wiescher

Measurement of 39K(p, γ)40Ca resonance strengths below 900 keV for nucleosynthesis in classical novae

NUCLEAR REACTIONS 39K(p, γ)40Ca, E=0.4, 1.4 MeV; measured Eγ, Iγ; deduced resonance strengths, astrophysical reaction rate (T=0.1-1.1 GK). 39K; lifetime under novae conditions. Comparison to previous experimental data and statistical model predictions (SAPPHIRE and NON-SMOKER codes). Single coaxial HPGe detector surrounded by BGO anti-Compton shield at 5U Pelletron accelerator of the Nuclear Science Laboratory (University of Notre Dame).

doi: 10.1103/PhysRevC.107.065806
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Data from this article have been entered in the XUNDL database. For more information, click here.


2023WA05      Phys.Rev.Lett. 130, 092701 (2023)

L.H.Wang, J.Su, Y.P.Shen, J.J.He, M.Lugaro, B.Szanyi, A.I.Karakas, L.Y.Zhang, X.Y.Li, B.Guo, G.Lian, Z.H.Li, Y.B.Wang, L.H.Chen, B.Q.Cui, X.D.Tang, B.S.Gao, Q.Wu, L.T.Sun, S.Wang, Y.D.Sheng, Y.J.Chen, H.Zhang, Z.M.Li, L.Y.Song, X.Z.Jiang, W.Nan, W.K.Nan, L.Zhang, F.Q.Cao, T.Y.Jiao, L.H.Ru, J.P.Cheng, M.Wiescher, W.P.Liu

Measurement of the 18O(α, γ)22Ne Reaction Rate at JUNA and Its Impact on Probing the Origin of SiC Grains

NUCLEAR REACTIONS 18O(α, γ), E=470-787 keV; measured reaction products, Eγ, Iγ; deduced thick target yields, resonance energies and resonance strengths, total reaction rates. Comparison with available data. The Jinping Underground Nuclear Astrophysics experimental facility (JUNA).

doi: 10.1103/PhysRevLett.130.092701
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2023WI01      Eur.Phys.J. A 59, 11 (2023)

M.Wiescher, R.J.deBoer, J.Gorres

The resonances in the 22Ne+α fusion reactions

NUCLEAR REACTIONS 22Ne(α, n), (α, γ), E(cm)<4.5 MeV; analyzed available data; deduced σ, resonance parameters, S-factor using AZURE2 and SAPPHIRE, HF calculations. α-cluster and single-particle structure of the compound nucleus.

doi: 10.1140/epja/s10050-023-00917-9
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2022AL01      J.Phys.(London) G49, 010501 (2022)

M.Aliotta, R.Buompane, M.Couder, A.Couture, R.J.deBoer, A.Formicola, L.Gialanella, J.Glorius, G.Imbriani, M.Junker, C.Langer, A.Lennarz, Y.A.Litvinov, W.-P.Liu, M.Lugaro, C.Matei, Z.Meisel, L.Piersanti, R.Reifarth, D.Robertson, A.Simon, O.Straniero, A.Tumino, M.Wiescher, Y.Xu

The status and future of direct nuclear reaction measurements for stellar burning

NUCLEAR REACTIONS 12C(α, γ), 22Ne(α, n), (α, γ), 12C(12C, X), E(cm)<7 MeV; analyzed available data; deduced σ, S-factors.

doi: 10.1088/1361-6471/ac2b0f
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2022BO17      Phys.Rev. C 106, 045801 (2022)

A.Boeltzig, R.J.deBoer, Y.Chen, A.Best, M.Couder, A.Di Leva, B.Frentz, J.Gorres, Gy.Gyurky, G.Imbriani, M.Junker, Q.Liu, S.Lyons, K.Manukyan, K.T.Macon, L.Morales, M.T.Moran, D.Odell, C.Seymour, G.Seymour, E.Stech, B.Vande Kolk, M.Wiescher

Investigation of direct capture in the 23Na(p, γ)24Mg reaction

NUCLEAR REACTIONS 23Na(p, γ), E=0.5-1 MeV; measured Eγ, Iγ; deduced σ(E) for 8 γ-transitions, resonance energies and partial widths, asymptotic normalisation coefficients (ANC), S-factor, reaction rate. R-matrix analysis with AZURE2 code. Comparison to other experimental data and theoretical calculations. HPGe detector at Stable ion Accelerator for Nuclear Astrophysics (University of Notre Dame).

doi: 10.1103/PhysRevC.106.045801
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022DE30      Phys.Rev. C 106, 055808 (2022)

R.J.deBoer, A.Gula, M.Febbraro, K.Brandenburg, C.R.Brune, J.Gorres, Gy.Gyurky, R.Kelmar, K.Manukyan, Z.Meisel, D.Odell, M.T.Pigni, Shahina, E.Stech, W.Tan, M.Wiescher

First near-threshold measurements of the 13C(α, n1)16O reaction for low-background-environment characterization

NUCLEAR REACTIONS 13C(α, n), E=5.0-5.57 MeV; measured En, In, angular distributions; deduced σ(θ, E) for α, n1 channel. R-matrix analysis with AZURE2 code. Uncertainty estimation with Bayesian R-matrix Inference Code Kit (BRICK). Comparison to the previous estimates of σ for α, ν1a channel, other experimental results for total σ and statistical model calculations. 3He-spectrometer at Stable ion Accelerator for Nuclear Astrophysics (University of Notre Dame).

doi: 10.1103/PhysRevC.106.055808
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2022DO02      Phys.Rev.Lett. 128, 162701 (2022)

A.C.Dombos, D.Robertson, A.Simon, T.Kadlecek, M.Hanhardt, J.Gorres, M.Couder, R.Kelmar, O.Olivas-Gomez, E.Stech, F.Strieder, M.Wiescher

Measurement of Low-Energy Resonance Strengths in the 18O(α, γ)22Ne Reaction

NUCLEAR REACTIONS 18O(α, γ), E=495.4 keV; measured reaction products, Eγ, Iγ; deduced resonance parameters, astrophysical reaction rates. The Sanford Underground Research Facility.

doi: 10.1103/PhysRevLett.128.162701
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2764. Data from this article have been entered in the XUNDL database. For more information, click here.


2022FR09      Phys.Rev. C 106, 065803 (2022)

B.Frentz, A.Aprahamian, A.Boeltzig, T.Borgwardt, A.M.Clark, R.J.deBoer, G.Gilardy, J.Gorres, M.Hanhardt, S.L.Henderson, K.B.Howard, T.Kadlecek, Q.Liu, K.T.Macon, S.Moylan, C.S.Reingold, D.Robertson, C.Seymour, S.Y.Strauss, F.Strieder, B.Vande Kolk, M.Wiescher

Investigation of the 14N(p, γ)15O reaction and its impact on the CNO cycle

NUCLEAR REACTIONS 14N(p, γ), E=0.27-1.07 MeV; measured Eγ, Iγ; deduced σ(θ, E) for particular transitions in daughter nuclei, astrophysical differential and total S-factor, astrophysical reaction rate for T=0.01-10 GK. Multichannel R-matrix analysis for the transition to the ground state, the excited states at 6.17 and 6.79 MeV, as well as 14N(p, p) differential scattering data. Discussed implication of the obtained data on the CNO neutrino production. Comparison to other experimental results. Single coaxial HPGe detector. Beam from 1 MV JN Van de Graaff at the Compact Accelerator System for Performing Astrophysical Research (CASPAR) at the Sanford Underground Research Facility.

doi: 10.1103/PhysRevC.106.065803
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2022GU23      Phys.Rev. C 106, 065801 (2022)

A.Gula, R.J.deBoer, R.Kelmar, J.Gorres, K.V.Manukyan, E.Stech, W.Tan, M.Wiescher

Excitation function for the 6Li + α reaction between 0.5 and 1.4 MeV

NUCLEAR REACTIONS 6Li(α, γ), E=460-1400 keV; measured Eγ, Iγ; deduced excitation functions, resonances, reaction rates for T=0.001-9.94 GK, narrow resonance contributions to the reaction rate. 10B; resonances, decay widths, branching ratios. R-matrix analysis with AZURE2 code. Comparison to other experimental data. CeBr3 single detector. Beam from 5U Pelletron accelerator at the University of Notre Dame.

doi: 10.1103/PhysRevC.106.065801
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022OL01      Eur.Phys.J. A 58, 57 (2022)

O.Olivas-Gomez, A.Simon, D.Robertson, A.C.Dombos, F.Strieder, T.Kadlecek, M.Hanhardt, R.Kelmar, M.Couder, J.Gorres, E.Stech, M.Wiescher

Commissioning of the 4πγ-summing array HECTOR at CASPAR: measurements of 27Al(p, γ)28Si resonances 4850 feet underground

NUCLEAR REACTIONS 27Al(p, γ), E=0.2-1 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, resonances, resonance strengths. Comparison with NACRE compilation. The High EffiCiency TOtal absorption spectrometeR (HECTOR).

doi: 10.1140/epja/s10050-022-00711-z
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Data from this article have been entered in the XUNDL database. For more information, click here.


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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2022SH36      Phys.Rev. C 106, 025805 (2022)

Shahina, J.Gorres, D.Robertson, M.Couder, O.Gomez, A.Gula, M.Hanhardt, T.Kadlecek, R.Kelmar, P.Scholz, A.Simon, E.Stech, F.Strieder, M.Wiescher

Direct measurement of the low-energy resonances in 22Ne(α, γ)26Mg reaction

NUCLEAR REACTIONS 22Ne(α, γ), E=650, 830 keV; measured Eγ, Iγ, γ sum spectra; deduced resonances strength values at 830- and 650 keV. 22Ne(p, γ), E=8510 keV; measured Eγ, Iγ, γ sum spectra; deduced resonance strength value at 851 keV. Beam energy uncertainty - 2 keV. Comparison to previous experimental data. HECTOR (High EffiCiency Total absorption spectrometeR (HECTOR)) array of 16 NaI(Tl) crystals at 1-MV JN positive ion accelerator CASPAR (Compact Accelerator System for Performing Astrophysical Research).

doi: 10.1103/PhysRevC.106.025805
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2808. Data from this article have been entered in the XUNDL database. For more information, click here.


2022VA04      Phys.Rev. C 105, 055802 (2022)

B.Vande Kolk, K.T.Macon, R.J.deBoer, T.Anderson, A.Boeltzig, K.Brandenburg, C.R.Brune, Y.Chen, A.M.Clark, T.Danley, B.Frentz, R.Giri, J.Gorres, M.Hall, S.L.Henderson, E.Holmbeck, K.B.Howard, D.Jacobs, J.Lai, Q.Liu, J.Long, K.Manukyan, T.Massey, M.Moran, L.Morales, D.Odell, P.O'Malley, S.N.Paneru, A.Richard, D.Schneider, M.Skulski, N.Sensharma, C.Seymour, G.Seymour, D.Soltesz, S.Strauss, A.Voinov, L.Wustrich, M.Wiescher

Investigation of the 10B (p, α)7Be reaction from 0.8 to 2.0 MeV

NUCLEAR REACTIONS 10B(p, α), (p, p), E=0.8-2.0 MeV; measured Eα, Iα, Ep, Ip; deduced σ(θ), σ(E) S-factor, resonance parameters of 10B+p system - energy, spin, partial (p0, α0, α1) and total width. 10B(p, γ), E=0 .1-2.0 MeV; deduced σ(θ). 11C; deduced levels, J, π. R-matrix analysis. Measurements were made at the University of Notre Dame (UND) Nuclear Science Laboratory (NSL) using a degrader foil method, while those at the Edwards AcceleratorLaboratory at Ohio University (OU) were performed using the time-of-flight (ToF)technique. Comparison with other experimental data.

doi: 10.1103/PhysRevC.105.055802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2767. Data from this article have been entered in the XUNDL database. For more information, click here.


2022ZH60      Nature(London) 610, 656 (2022)

L.Zhang, J.He, R.J.deBoer, M.Wiescher, A.Heger, D.Kahl, J.Su, D.Odell, Y.Chen, X.Li, J.Wang, L.Zhang, F.Cao, H.Zhang, Z.Zhang, X.Jiang, L.Wang, Z.Li, L.Song, H.Zhao, L.Sun, Q.Wu, J.Li, B.Cui, L.Chen, R.Ma, E.Li, G.Lian, Y.D.Sheng, Z.Li, B.Guo, X.Zhou, Y.Zhang, H.Xu, J.Cheng, W.Liu

Measurement of 19F(p, γ)20Ne reaction suggests CNO breakout in first stars

NUCLEAR REACTIONS 19F(p, γ), E(cm)<400 keV; measured reaction products, Eγ, Iγ; deduced yields, S-factor, resonance strengths, astrophysical reaction rates. Comparison with available data. The Jinping Underground Nuclear Astrophysics Experiment (JUNA).

doi: 10.1038/s41586-022-05230-x
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2022ZH67      Phys.Rev. C 106, 055803 (2022)

L.Y.Zhang, J.Su, J.J.He, R.J.deBoer, D.Kahl, M.Wiescher, D.Odell, Y.J.Chen, X.Y.Li, J.G.Wang, L.Zhang, F.Q.Cao, H.Zhang, Z.C.Zhang, T.Y.Jiao, Y.D.Sheng, L.H.Wang, L.Y.Song, X.Z.Jiang, Z.M.Li, E.T.Li, S.Wang, G.Lian, Z.H.Li, B.Guo, X.D.Tang, L.T.Sun, Q.Wu, J.Q.Li, B.Q.Cui, L.H.Chen, R.G.Ma, N.C.Qi, W.L.Sun, X.Y.Guo, P.Zhang, Y.H.Chen, Y.Zhou, J.F.Zhou, J.R.He, C.S.Shang, M.C.Li, J.P.Cheng, W.P.Liu

Direct measurement of the astrophysical 19F(p, αγ)16O reaction in a deep-underground laboratory

NUCLEAR REACTIONS 19F(p, αγ), E(cm)=72.4-344 keV; measured Eγ, Iγ; deduced astrophysical S-factor, thermonuclear astrophysical reaction rates (range 0.05–1 GK), contributions from different channels. R-matrix analysis with AZURE2 together with a MCMC Bayesian uncertainty estimation. Comparison to other experimental data. 4π BGO γ-array with proton beam from JUNA accelerator at China JinPing underground Laboratory (CJPL).

doi: 10.1103/PhysRevC.106.055803
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021CH16      Phys.Rev. C 103, 035809 (2021)

Y.Chen, G.P.A.Berg, R.J.deBoer, J.Gorres, H.Jung, A.Long, K.Seetedohnia, R.Talwar, M.Wiescher, S.Adachi, H.Fujita, Y.Fujita, K.Hatanaka, C.Iwamoto, B.Liu, S.Noji, H.-J.Ong, A.Tamii

Neutron transfer studies on 25Mg and its correlation to neutron radiative capture processes

NUCLEAR REACTIONS 25Mg(d, p)26Mg, E=56 MeV; measured E(p), I(p), σ(θ) using Grand Raiden (GR) spectrometer at the RCNP, AVF cyclotron facility. 26Mg; deduced levels, J, π, L-transfers, spectroscopic factors, and compared with previous experimental results for levels populated in (d, p) and (n, γ) reactions. 25Mg(n, γ)26Mg, E<275 keV; deduced σ(E) using the structure parameters such as level energies and widths from surrogate (d, p) neutron transfer reaction and R-matrix analysis. Relevance to proton-induced nucleosynthesis in the CNO cycles and the rp process.

doi: 10.1103/PhysRevC.103.035809
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2691. Data from this article have been entered in the XUNDL database. For more information, click here.


2021CO05      Rev.Mod.Phys. 93, 015002 (2021)

J.J.Cowan, C.Sneden, J.E.Lawler, A.Aprahamian, M.Wiescher, K.Langanke, G.Martinez-Pinedo, F.-K.Thielemann

Origin of the heaviest elements: The rapid neutron-capture process

doi: 10.1103/RevModPhys.93.015002
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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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2021DE17      Phys.Rev. C 103, 065801 (2021)

R.J.deBoer, A.Boeltzig, K.T.Macon, S.Aguilar, O.Gomez, B.Frentz, S.L.Henderson, R.Kelmar, M.Renaud, G.Seymour, B.Vande Kolk, M.Wiescher, C.R.Brune, S.P.Burcher, K.L.Jones, J.M.Kovoor, M.Febbraro, G.Imbriani, S.Mosby, K.Smith, R.Toomey

Investigation of secondary γ-ray angular distributions using the 15N(p, α1γ)12C* reaction

NUCLEAR REACTIONS 15N(p, αγ)12C*, E=0.88-4.0 MeV; measured Eγ, Iγ, angular distributions using Hybrid Array of LaBr3(Ce) Gamma Ray Detectors (HAGRiD) at the 5-MV Santa Ana accelerator of University of Notre Dame; deduced σ(E), σ(θ) distributions. 15N(p, αγ)12C*; 12C(α, α), (α, α'); analyzed present and previous experimental data for σ(θ) distributions by R-matrix formalism using AZURE2 code. Discussed inconsistencies and difficulty in fitting previous data. Detailed cross section data for both the reactions listed in the Supplemental Material.

doi: 10.1103/PhysRevC.103.065801
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2021FR05      Phys.Rev. C 103, 045802 (2021)

B.Frentz, A.Aprahamian, A.M.Clark, R.J.deBoer, C.Dulal, J.D.Enright, J.Gorres, S.L.Henderson, J.D.Hinnefeld, K.B.Howard, R.Kelmar, K.Lee, L.Morales, S.Moylan, Z.Rahman, W.Tan, L.E.Weghorn, M.Wiescher

Lifetime measurements of excited states in 15O

NUCLEAR REACTIONS 14N(p, γ)15O, E=1020, 1570 keV; measured Eγ, Iγ, half-lives of 5.18-, 6.17- and 6.79-MeV levels in 15O by Doppler-shift attenuation method (DSAM) using three separate, nitrogen-implanted targets with Mo, Ta, and W backings at the Nuclear Science Laboratory (NSL) of University of Notre Dame. Comparison with previous half-life measurements. Monte Carlo simulations of Doppler-shift attenuation factors. R-matrix analysis of asymptotic normalization constants (ANCs) and radiative widths Γγ using AZURE2 code for g.s. and levels between 6793 and 9609 keV, including half-lives measured in the present work and experimental data in literature. Relevance to CNO chain of reactions and uncertainty in the 14N(p, γ)15O reaction rate.

doi: 10.1103/PhysRevC.103.045802
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2021WI02      Eur.Phys.J. A 57, 24 (2021)

M.Wiescher, O.Clarkson, R.J.deBoer, P.Denisenkov

Nuclear clusters as the first stepping stones for the chemical evolution of the universe

NUCLEAR REACTIONS 6,7Li(α, γ), E(cm)<2.5 MeV; 10B(α, n), (α, d), E(cm)<1.2 MeV; analyzed available data; deduced σ, σ(θ), reaction rates.

doi: 10.1140/epja/s10050-020-00339-x
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2021ZH53      Phys.Rev.Lett. 127, 152702 (2021)

L.Y.Zhang, J.Su, J.J.He, M.Wiescher, R.J.deBoer, D.Kahl, Y.J.Chen, X.Y.Li, J.G.Wang, L.Zhang, F.Q.Cao, H.Zhang, Z.C.Zhang, T.Y.Jiao, Y.D.Sheng, L.H.Wang, L.Y.Song, X.Z.Jiang, Z.M.Li, E.T.Li, S.Wang, G.Lian, Z.H.Li, X.D.Tang, H.W.Zhao, L.T.Sun, Q.Wu, J.Q.Li, B.Q.Cui, L.H.Chen, R.G.Ma, B.Guo, S.W.Xu, J.Y.Li, N.C.Qi, W.L.Sun, X.Y.Guo, P.Zhang, Y.H.Chen, Y.Zhou, J.F.Zhou, J.R.He, C.S.Shang, M.C.Li, X.H.Zhou, Y.H.Zhang, F.S.Zhang, Z.G.Hu, H.S.Xu, J.P.Chen, W.P.Liu

Direct Measurement of the Astrophysical 19F(p, αγ)16O Reaction in the Deepest Operational Underground Laboratory

NUCLEAR REACTIONS 19F(p, α), E(cm)=72.4-188.8 keV; measured reaction products, Eγ, Iγ; deduced yields, S-factors, reaction rates. The China Jinping Underground Laboratory (CJPL), JUNA accelerator.

doi: 10.1103/physrevlett.127.152702
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2020AH03      Phys.Rev. C 102, 035805 (2020)

T.Ahn, S.Aguilar, R.J.deBoer, D.W.Bardayan, A.Boeltzig, C.R.Brune, S.P.Burcher, K.Y.Chae, S.L.Henderson, R.K.Grzywacz, K.L.Jones, J.M.Kovoor, K.T.Macon, K.Manukyan, S.Mosby, P.D.O'Malley, M.Renaud, K.Smith, C.Thornsberry, B.Vande Kolk, M.Wiescher

Cross-section measurements to low-lying excited final states in the 24Mg(α, p)27Al*(γ) reaction as an energy source for x-ray bursts

NUCLEAR REACTIONS 24Mg(α, p)27Al*, E=4.0-5.4 MeV; measured Eγ, Iγ, γ(θ) for γ rays emitted by resonances in 27Al using an array of 13 LaBr3 detectors from the Hybrid Array of Gamma Ray Detectors (HAGRiD) and enriched target at the ANA accelerator at the University of Notre Dame; deduced yields for resonances in 27Al, integrated angular yields for resonances in 27Al for (α, p1) and (α, p2) channels, astrophysical reaction rates from 1-10 GK. Relevance to energy production in type Ia x-ray bursts. The γ rays also seen from 24Mg(α, a°), 24Mg(α, n)20Ne, and 24Mg(α, γ)28Si.

doi: 10.1103/PhysRevC.102.035805
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2020DE12      Phys.Rev. C 101, 045802 (2020)

R.J.deBoer, C.R.Brune, M.Febrarro, J.Gorres, I.J.Thompson, M.Wiescher

Sensitivity of the 13C(α, n)16O S factor to the uncertainty in the level parameters of the near-threshold state

NUCLEAR REACTIONS 13C(α, n)16O, E(cm)<1.2 MeV; calculated astrophysical S factors and reaction rates by R-matrix theory using the AZURE2 code for different sets of level parameters for the near-threshold 1/2+ resonance at 6356 keV in 17O; analyzed theory and available experimental data to investigate the sensitivity of the low-energy extrapolation to the associated uncertainties and discrepancies. Relevance to s process in asymptotic giant branch (AGB) stars and i process in carbon-enhanced metal-poor (CEMP) stars.

doi: 10.1103/PhysRevC.101.045802
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2020FE06      Phys.Rev.Lett. 125, 062501 (2020)

M.Febbraro, R.J.deBoer, S.D.Pain, R.Toomey, F.D.Becchetti, A.Boeltzig, Y.Chen, K.A.Chipps, M.Couder, K.L.Jones, E.Lamere, Q.Liu, S.Lyons, K.T.Macon, L.Morales, W.A.Peters, D.Robertson, B.C.Rasco, K.Smith, C.Seymour, G.Seymour, M.S.Smith, E.Stech, B.Vande Kolk, M.Wiescher

New 13C(α, n)16O Cross Section with Implications for Neutrino Mixing and Geoneutrino Measurements

NUCLEAR REACTIONS 13C(α, n), E=5.2-6.4 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with experimental data, JENDL and ENDF/B evaluated libraries.

doi: 10.1103/PhysRevLett.125.062501
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2020LI08      Phys.Rev. C 101, 025808 (2020)

Q.Liu, M.Febbraro, R.J.deBoer, S.Aguilar, A.Boeltzig, Y.Chen, M.Couder, J.Gorres, E.Lamere, S.Lyons, K.T.Macon, K.Manukyan, L.Morales, S.Pain, W.A.Peters, C.Seymour, G.Seymour, R.Toomey, B.Vande Kolk, J.Weaver, M.Wiescher

Low-energy cross-section measurement of the 10B(α, n)13N reaction and its impact on neutron production in first-generation stars

NUCLEAR REACTIONS 10B(α, n)13N, E=575-2522 keV; measured E(n), I(n), n(θ), σ(E, θ), differential S factors using deuterated liquid scintillator detector for neutrons at the University of Notre Dame Nuclear Science Laboratory. 10B(α, pγ)13C, E=835-1665 keV; measured Eγ and Iγ. 14N; deduced levels, resonances, J, π, Γα, Γn, Γp, Γd, and Γ from R-matrix analysis, and compared with earlier experimental results. 10B(α, n), (α, p), (α, d), (α, α), E(cm)=0.4-1.2 MeV; analyzed present and previous experimental data for differential σ(E) by R-matrix fit. 10B(α, n)13N, T=0.1-10 GK; deduced astrophysical reaction rates, and compared to literature data.

doi: 10.1103/PhysRevC.101.025808
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2020PI11      Eur.Phys.J. A 56, 199 (2020)

R.G.Pizzone, C.Spampinato, R.Sparta, M.Couder, W.Tan, V.Burjan, G.D'Agata, G.L.Guardo, M.La Cognata, L.Lamia, J.Mrazek, S.Palmerini, S.Typel, A.Tumino, M.Wiescher, S.Anguilar, D.Bardayan, D.Blankstein, L.Boccioli, L.Callahan, S.M.Cha, K.Y.Chae, A.M.Clark, B.Frentz, M.R.Hall, A.Gula, S.Henderson, R.Kelmar, M.S.Kwag, I.Indelicato, M.La Commara, D.Lattuada, Q.Liu, J.Long, M.Mazzocco, A.Majumdar, S.McGuinness, A.Nelson, A.A.Oliva, P.O'Malley, P.M.Prajapati, G.G.Rapisarda, S.Romano, M.L.Sergi, C.Seymour, M.Skulski, C.Spitaleri, J.Wilkinson

Indirect measurement of the 3He(n, p)3H reaction cross section at Big Bang energies

NUCLEAR REACTIONS 2H(3He, pt), E=9 MeV; measured reaction products, Ep, Ip; deduced σ for 3He(n, p) reaction using the Trojan Horse Method (THM).

doi: 10.1140/epja/s10050-020-00212-x
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2020TA08      Phys.Rev.Lett. 124, 192702 (2020)

W.P.Tan, A.Boeltzig, C.Dulal, R.J.deBoer, B.Frentz, S.Henderson, K.B.Howard, R.Kelmar, J.J.Kolata, J.Long, K.T.Macon, S.Moylan, G.F.Peaslee, M.Renaud, C.Seymour, G.Seymour, B.Vande Kolk, M.Wiescher, E.F.Aguilera, P.Amador-Valenzuela, D.Lizcano, E.Martinez-Quiroz

New Measurement of 12C+12C Fusion Reaction at Astrophysical Energies

NUCLEAR REACTIONS 12C(12C, X), E(cm)=2.2-5.0 MeV; measured reaction products, Eγ, Iγ; deduced σ, S-factor. Comparison with available data.

doi: 10.1103/PhysRevLett.124.192702
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2020WI03      Acta Phys.Pol. B51, 631 (2020)

M.Wiescher, R.J.DeBoer, J.Gorres, A.Gula, Q.Liu

Neutrons Sources in Early Stars*

doi: 10.5506/APhysPolB.51.631
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2019BE31      Phys.Lett. B 797, 134900 (2019)

A.Best, F.R.Pantaleo, A.Boeltzig, G.Imbriani, M.Aliotta, J.Balibrea-Correa, D.Bemmerer, C.Broggini, C.G.Bruno, R.Buompane, A.Caciolli, F.Cavanna, T.Chillery, G.F.Ciani, P.Corvisiero, L.Csedreki, T.Davinson, R.J.deBoer, R.Depalo, A.Di Leva, Z.Elekes, F.Ferraro, E.M.Fiore, A.Formicola, Zs.Fulop, G.Gervino, A.Guglielmetti, C.Gustavino, Gy.Gyurky, M.Junker, I.Kochanek, M.Lugaro, P.Marigo, R.Menegazzo, V.Mossa, V.Paticchio, R.Perrino, D.Piatti, P.Prati, L.Schiavulli, K.Stockel, O.Straniero, F.Strieder, T.Szucs, M.P.Takacs, D.Trezzi, M.Wiescher, S.Zavatarelli

Cross section of the reaction 18O(p, γ)19F at astrophysical energies: The 90 keV resonance and the direct capture component

NUCLEAR REACTIONS 18O(p, γ), E<1 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, resonance parameters, σ. Comparison with available data.

doi: 10.1016/j.physletb.2019.134900
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2019BO09      Phys.Lett. B 795, 122 (2019)

A.Boeltzig, A.Best, F.R.Pantaleo, G.Imbriani, M.Junker, M.Aliotta, J.Balibrea-Correa, D.Bemmerer, C.Broggini, C.G.Bruno, R.Buompane, A.Caciolli, F.Cavanna, T.Chillery, G.F.Ciani, P.Corvisiero, L.Csedreki, T.Davinson, R.J.deBoer, R.Depalo, A.Di Leva, Z.Elekes, F.Ferraro, E.M.Fiore, A.Formicola, Zs.Fulop, G.Gervino, A.Guglielmetti, C.Gustavino, Gy.Gyurky, I.Kochanek, M.Lugaro, P.Marigo, R.Menegazzo, V.Mossa, F.Munnik, V.Paticchio, R.Perrino, D.Piatti, P.Prati, L.Schiavulli, K.Stockel, O.Straniero, F.Strieder, T.Szucs, M.P.Takacs, D.Trezzi, M.Wiescher, S.Zavatarelli

Direct measurements of low-energy resonance strengths of the 23Na(p, γ)24Mg reaction for astrophysics

NUCLEAR REACTIONS 23Na(p, γ), E<1 MeV; measured reaction products, Eγ, Iγ; deduced resonance parameters, strengths, astrophysical reaction rates. Comparison with available data.

doi: 10.1016/j.physletb.2019.05.044
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2019LI42      Phys.Rev. C 100, 034601 (2019)

Q.Liu, M.Febbraro, R.J.deBoer, A.Boeltzig, Y.Chen, C.Cerjan, M.Couder, B.Frentz, J.Gorres, E.A.Henry, E.Lamere, K.T.Macon, K.V.Manukyan, L.Morales, P.D.O'Malley, S.D.Pain, W.A.Peters, D.Schneider, C.Seymour, G.Seymour, E.Temanson, R.Toomey, B.Vande Kolk, J.Weaver, M.Wiescher

Measurement of the 10Ba (α, n0) 13N cross section for 2.2 < Eα < 4.9 MeV and its application as a diagnostic at the National Ignition Facility

NUCLEAR REACTIONS 10B(α, n), (α, n0)13N, E=2.2-4.9 MeV; measured En, In using five deuterated liquid scintillation detectors at the University of Notre Dame Nuclear Science Laboratory; deduced differential σ(E), angular distribution coefficients, thick target yields. Comparison with previous experimental data. Preliminary calculations performed to test feasibility of this reaction as a diagnostic tool for the National Ignition Facility (NIF) implosion. 10B(α, p)13C, E=2.2-4.9 MeV; measured secondary Eγ, γ-ray yields, used for troubleshooting during the experiment.

doi: 10.1103/PhysRevC.100.034601
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2019WA02      Phys.Rev. C 99, 015804 (2019)

A.Wallner, M.Bichler, L.Coquard, I.Dillmann, O.Forstner, R.Golser, M.Heil, F.Kappeler, W.Kutschera, C.Lederer-Woods, M.Martschini, A.Mengoni, S.Merchel, L.Michlmayr, A.Priller, P.Steier, M.Wiescher

Stellar and thermal neutron capture cross section of 9Be

NUCLEAR REACTIONS 9Be(n, γ), kT=thermal, 5-100 keV, [neutrons from 7Li(p, n), E=1912, 2284 keV]; measured Maxwellian averaged σ(E) (MACS) using neutron activation combined with accelerator mass spectrometry (AMS) technique; deduced 10Be/9Be ratio in irradiated sample; calculated astrophysical reaction rates for T9=0.001 to 10 for s process nucleosynthesis calculations. Activation technique at Karlsruhe Van de Graaff accelerator, and TRIGA Mark-II reactor for thermal neutrons in combination with accelerator mass spectrometry at the Vienna Environmental Research Accelerator. Comparison with previous experimental values, compiled KADoNiS database, and evaluated libraries ENDF-B/VIII.1, JEFF-3.3, JENDL-4.0, BROND-3.1, and CENDL-3.1.

doi: 10.1103/PhysRevC.99.015804
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2018DI06      Phys.Rev. C 97, 055802 (2018)

A.Diaz-Torres, M.Wiescher

Characterizing the astrophysical S factor for 12C+12C fusion with wave-packet dynamics

NUCLEAR REACTIONS 12C(12C, X), E(cm)=1-7 MeV; calculated transmission coefficient, energy-resolved fusion σ(E), angular momentum decomposition of the converged fusion excitation function, astrophysical S factor excitation function with and without reduction in curvature of the potential pockets using time-dependent wave-packet (TDWP) dynamics for subbarrier fusion. Comparison with experimental values, and with other model calculations. Discussed extrapolating the cross section predictions towards stellar energies.

doi: 10.1103/PhysRevC.97.055802
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2018LA06      Astrophys.J. 859, 62 (2018)

R.Lau, M.Beard, S.S.Gupta, H.Schatz, A.V.Afanasjev, E.F.Brown, A.Deibel, L.R.Gasques, G.W.Hitt, W.R.Hix, L.Keek, P.Moller, P.S.Shternin, A.W.Steiner, M.Wiescher, Y.Xu

Nuclear Reactions in the Crusts of Accreting Neutron Stars

doi: 10.3847/1538-4357/aabfe0
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2018LO11      Phys.Rev. C 97, 054613 (2018)

A.M.Long, T.Adachi, M.Beard, G.P.A.Berg, M.Couder, R.J.deBoer, M.Dozono, J.Gorres, H.Fujita, Y.Fujita, K.Hatanaka, D.Ishikawa, T.Kubo, H.Matsubara, Y.Namiki, S.O'Brien, Y.Ohkuma, H.Okamura, H.J.Ong, D.Patel, Y.Sakemi, Y.Shimbara, S.Suzuki, R.Talwar, A.Tamii, A.Volya, T.Wakasa, R.Watanabe, M.Wiescher, R.Yamada, J.Zenihiro

α-unbound levels in 34Ar from 36Ar(p, t)34Ar reaction measurements and implications for the astrophysical 30S (α, p)33Cl reaction rate

NUCLEAR REACTIONS 36Ar(p, t), E=100 MeV; measured triton spectra, σ(θ) using Grand Raiden spectrograph at RCNP, Osaka. 34Ar; deduced levels, α-unbound states; calculated single proton widths, spin distributions for selected excitation energies, and α-spectroscopic factors using back-shifted Fermi gas (BSFG) model and shell model calculations. Comparison of 34Ar levels in several previous experiments. 30S(α, p)33Cl, T9=0.10-3.0; calculated astrophysical reaction rates at temperatures relevant to x-ray bursts (XRB) using a Monte Carlo approach within a narrow-resonance formalism. Comparison of reaction rates with two standard Hauser-Feshbach model predictions.

doi: 10.1103/PhysRevC.97.054613
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2018LY04      Phys.Rev. C 97, 065802 (2018)

S.Lyons, J.Gorres, R.J.deBoer, E.Stech, Y.Chen, G.Gilardy, Q.Liu, A.M.Long, M.Moran, D.Robertson, C.Seymour, B.Vande Kolk, M.Wiescher, A.Best

Determination of 20Ne(p, γ)21Na cross sections from Ep = 500 2000 keV

NUCLEAR REACTIONS 20,22Ne(p, γ), E=500-2000 keV; measured Eγ, Iγ, γ(θ), differential σ(θ, E) at the KN accelerator of Notre Dame Nuclear Science Laboratory. 21Na; deduced levels, resonances, asymptotic normalization constants (ANCs), proton widths, γ-widths, astrophysical S-factor, and reaction rates in the range of 0.010-10.0 GK. AZURE2 R-matrix analysis. Comparison with previous experimental results, NACRE evaluation, and with theoretical predictions. Relevance to nucleosynthesis of Ne, Na, and Mg isotopes, and hydrogen burning in red giants, asymptotic giant branch (AGB) stars, massive stars, and oxygen-neon (ONe) nova.

doi: 10.1103/PhysRevC.97.065802
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2018RE13      Eur.Phys.J.Plus 133, 424 (2018)

R.Reifarth, P.Erbacher, S.Fiebiger, K.Gobel, T.Heftrich, M.Heil, F.Kappeler, N.Klapper, D.Kurtulgil, C.Langer, C.Lederer-Woods, A.Mengoni, B.Thomas, S.Schmidt, M.Weigand, M.Wiescher

Neutron-induced cross sections

NUCLEAR REACTIONS 103Rh, 110,111,112,113,114,116Cd, 114,115,116,117,118,120Sn, 122,123,124,125,126Te, 128,129,130Xe, 134,135,136,137Ba, 141Pr, 142,143,144,145,146,148Nd, 148,149,150,151,152Sm, 152,154,155,156,157,158Gd, 160,161,162,163,164Dy, 170,171,172,173,174,176Yb, 175,176Lu, 176,177,178,179,180Hf, 180,181Ta, 197Au(n, γ), E∼24 keV; analyzed available data on activation technique and the time-of-flight method; deduced multiple corrections for KADoNiS library based on standards library, new 197Au(n, γ) σ evaluation.

doi: 10.1140/epjp/i2018-12295-3
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2018WA07      Phys.Rev. C 97, 034612 (2018)

F.Wamers, J.Marganiec, F.Aksouh, Yu.Aksyutina, H.Alvarez-Pol, T.Aumann, S.Beceiro Novo, C.A.Bertulani, K.Boretzky, M.J.G.Borge, M.Chartier, A.Chatillon, L.V.Chulkov, D.Cortina-Gil, H.Emling, O.Ershova, L.M.Fraile, H.O.U.Fynbo, D.Galaviz, H.Geissel, M.Heil, D.H.H.Hoffmann, J.Hoffman, H.T.Johansson, B.Jonson, C.Karagiannis, O.A.Kiselev, J.V.Kratz, R.Kulessa, N.Kurz, C.Langer, M.Lantz, T.Le Bleis, C.Lehr, R.Lemmon, Yu.A.Litvinov, K.Mahata, C.Muntz, T.Nilsson, C.Nociforo, W.Ott, V.Panin, S.Paschalis, A.Perea, R.Plag, R.Reifarth, A.Richter, K.Riisager, C.Rodriguez-Tajes, D.Rossi, D.Savran, G.Schrieder, H.Simon, J.Stroth, K.Summerer, O.Tengblad, S.Typel, H.Weick, M.Wiescher, C.Wimmer

Comparison of electromagnetic and nuclear dissociation of 17Ne

NUCLEAR REACTIONS H, C, Pb(17Ne, p15O), (17Ne, p14O), (17Ne, 2p15O), (17Ne, 2p14O), E=500 MeV/nucleon; measured reaction products, mass spectra of 13O, 14O and 15O isotopes, (14O)p-, (14O)2p-, (15O)p-, (15O)2p-coin using lead, carbon, and polyethylene targets and ALADIN-R3B setup at GSI; deduced transverse momentum distributions of 14O and 15O, relative energy spectra, inclusive σ, σ(1p) and σ(2p) for fragmentation of 17Ne in 14O and 15o for different targets, electromagnetic dissociation (EMD) cross sections. Electromagnetic and nuclear dissociations. One-proton knockout, and three body 15O+2p correlations. Comparison of measured cross sections and energy spectra with calculations using three-body 15O+2p model, and Hartree-Bogoliubov theory. Relevance to 15O(2p, γ)17Ne capture reaction in astrophysical rp-process.

doi: 10.1103/PhysRevC.97.034612
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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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2017DE26      Rev.Mod.Phys. 89, 035007 (2017)

R.J.deBoer, J.Gorres, M.Wiescher, R.E.Azuma, A.Best, C.R.Brune, C.E.Fields, S.Jones, M.Pignatari, D.Sayre, K.Smith, F.X.Timmes, E.Uberseder

The 12C(α, γ)16O reaction and its implications for stellar helium burning

NUCLEAR REACTIONS 12C(α, γ)16O, E(cm)<6 MeV; analyzed available data; deduced σ, reaction rates and uncertainties.

doi: 10.1103/RevModPhys.89.035007
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2017FA10      Phys.Rev. C 96, 045804 (2017)

X.Fang, W.P.Tan, M.Beard, R.J.deBoer, G.Gilardy, H.Jung, Q.Liu, S.Lyons, D.Robertson, K.Setoodehnia, C.Seymour, E.Stech, B.Vande Kolk, M.Wiescher, R.T.deSouza, S.Hudan, V.Singh, X.D.Tang, E.Uberseder

Experimental measurement of 12C + 16O fusion at stellar energies

NUCLEAR REACTIONS 12C(16O, p), (16O, n), (16O, α), E=8.5-11.7 MeV in steps of 100 or 200 keV; measured Eγ, Iγ, Ep, Ip, pγ-coin, charged particles, partial and total fusion σ(E) at the (ANA) accelerator laboratory (NSL) of University of Notre Dame; deduced S factors, astrophysical reaction rates, uncertainty range of the reaction rate within the temperature range of late stellar burning environments. Results analyzed using Statistical model calculations with SAPPHIRE code. 27Al, 24Mg, 27Si; deduced levels, relative γ strengths of the observed transitions with respect to the strength of the ground state transition of the first excited states.

doi: 10.1103/PhysRevC.96.045804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2812.


2017GU05      Phys.Rev. C 95, 025807 (2017)

G.L.Guardo, C.Spitaleri, L.Lamia, M.Gulino, M.La Cognata, X.Tang, R.deBoer, X.Fang, V.Goldberg, J.Mrazek, A.Mukhamedzhanov, M.Notani, R.G.Pizzone, G.G.Rapisarda, M.L.Sergi, M.Wiescher

Assessing the near threshold cross section of the 17O(n, α)14C reaction by means of the Trojan horse method

NUCLEAR REACTIONS 2H(17O, α14C), E=43.5 MeV; measured reaction products, particle spectra, (particle)(particle)-coin, angular distributions using two telescopes of ionization chambers (IC) and silicon position-sensitive detector (PSD) at LNS-Catania and NSL-Notre Dame accelerator facilities; deduced normalized reaction yields, experimental momentum distribution, quasifission (QF) cross sections and best fit from R-matrix analysis. 18O; deduced levels, resonances, J, π, and Trojan horse method (THM) analysis of Γn, Γα and total widths. 17O(n, α)14C, T9=0.01-10; deduce astrophysical reaction rates by THM method.

doi: 10.1103/PhysRevC.95.025807
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2017LO05      Phys.Rev. C 95, 055803 (2017)

A.M.Long, T.Adachi, M.Beard, G.P.A.Berg, Z.Buthelezi, J.Carter, M.Couder, R.J.deBoer, R.W.Fearick, S.V.Fortsch, J.Gorres, J.P.Mira, S.H.T.Murray, R.Neveling, P.Papka, F.D.Smit, E.Sideras-Haddad, J.A.Swartz, R.Talwar, I.T.Usman, M.Wiescher, J.J.Van Zyl, A.Volya

Indirect study of the stellar 34Ar(α, p)37K reaction rate through 40Ca(p, t)38Ca reaction measurements

NUCLEAR REACTIONS 40Ca(p, t)38Ca, E=100 MeV; measured spectra using the K=600 magnetic spectrograph, triton spectra at K=200 Separated Sector Cyclotron facility of iThemba LABS. 38Ca; deduced levels, α-unbound states, resonances, α-spectroscopic factors. Comparison with previous experimental results. 34Ar(α, p)37K, T9=0.2-3.0; deduced reaction rates as a function of stellar temperature, and compared with theoretical model calculations using NON-SMOKER-v5.0w and TALYS 1.8 codes. Relevance to type I x-ray bursts (XRBs).

doi: 10.1103/PhysRevC.95.055803
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2017OZ01      Phys.Rev. C 96, 045805 (2017)

N.Ozkan, R.T.Guray, C.Yalcin, W.P.Tan, A.Aprahamian, M.Beard, R.J.deBoer, S.Almaraz-Calderon, S.Falahat, J.Gorres, Q.Li, A.Sauerwein, K.Sonnabend, M.Wiescher, Zs.Fulop, Gy.Gyurky, E.Somorjai, J.Greene

Proton capture reaction cross section measurements on 162Er as a probe of statistical model calculations

NUCLEAR REACTIONS 162Er(p, γ)163Tm, 162Er(p, n)162Tm, E=4.0-9.0 MeV in steps of 0.5 MeV; measured reaction products, Eγ, Iγ, σ(E) by activation method using the FN tandem accelerator at the University of Notre Dame; deduced S factors. Comparison with Hauser Feshbach (HF) statistical model calculations using NON-SMOKER and TALYS codes.

doi: 10.1103/PhysRevC.96.045805
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2017UB01      Phys.Rev. C 95, 025803 (2017)

E.Uberseder, M.Heil, F.Kappeler, C.Lederer, A.Mengoni, S.Bisterzo, M.Pignatari, M.Wiescher

Stellar (n, γ) cross sections of 23Na

NUCLEAR REACTIONS 23Na(n, γ)24Na, E=quasistellar thermal neutrons with kT=5.1-25 keV; measured neutron spectra, Eγ, Iγ, Maxwellian averaged σ(E) (MACS) by activation method using NaCl target at Karlsruhe Van de Graaff accelerator; σ(E) analyzed by R-matrix method using SAMMY code. Comparison with ENDF/B-VII.1 evaluation. Calculated relative s-abundance distribution at the end of C-shell burning with the MACS of 23Na from the KADONIS database compilation, ratio of s-process yields.

doi: 10.1103/PhysRevC.95.025803
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2017WI05      Phys.Rev. C 95, 044617 (2017)

M.Wiescher, R.J.deBoer, J.Gorres, R.E.Azuma

Low energy measurements of the 10B (p, α) 7Be reaction

NUCLEAR REACTIONS 10B(p, p), (p, α), E=80-1440 keV; measured Eα, Iα σ(θ, E) at incident E(p)=400-1000 keV, and Eγ, Iγ at E(p)=80-1440 keV for the yield of the 429 keV radiation from the reaction at the University of Notre Dame; deduced total S-factor, Legendre polynomial fit parameters from angular distributions. R-matrix analysis. Comparison with previous experimental data.

doi: 10.1103/PhysRevC.95.044617
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2016BO10      Eur.Phys.J. A 52, 75 (2016)

A.Boeltzig, C.G.Bruno, F.Cavanna, S.Cristallo, T.Davinson, R.Depalo, R.J.deBoer, A.Di Leva, F.Ferraro, G.Imbriani, P.Marigo, F.Terrasi, M.Wiescher

Shell and explosive hydrogen burning - Nuclear reaction rates for hydrogen burning in RGB, AGB and Novae

COMPILATION 15N(p, γ0), (p, γ), E(cm)=0.01-2 MeV;15N, 17O, 22Ne, 23Na, 25Mg(p, γ), T=0.01-1 GK;17O(p, α), T=0.01-1 GK; compiled data on reaction rates. 15N(p, γ0); deduced S-factor using R-matrix.

doi: 10.1140/epja/i2016-16075-4
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2016HA33      Phys.Rev. C 94, 045801 (2016)

Z.Halasz, E.Somorjai, Gy.Gyurky, Z.Elekes, Zs.Fulop, T.Szucs, G.G.Kiss, N.T.Szegedi, T.Rauscher, J.Gorres, M.Wiescher

Experimental study of the astrophysical γ-process reaction 124Xe(α, γ)128Ba

NUCLEAR REACTIONS 124Xe(α, γ)128Ba, 124Xe(α, n)127Ba, E=11-15 MeV; measured Eγ, Iγ, σ(E) by activation method using a thin window gas cell. Comparison with Hauser-Feshbach statistical model calculations, 124Xe+α optical potential, astrophysical gamma-process, and supernova models.

doi: 10.1103/PhysRevC.94.045801
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2016LI29      Phys.Rev. C 93, 055806 (2016)

Q.Li, J.Gorres, R.J.deBoer, G.Imbriani, A.Best, A.Kontos, P.J.LeBlanc, E.Uberseder, M.Wiescher

Cross section measurement of 14N(p, γ)15O in the CNO cycle

NUCLEAR REACTIONS 14N(p, γ)15O, E=0.7-3.6 MeV; measured Eγ, Iγ, γ(θ), differential σ(E) for ground-state and 6.79 MeV transitions using the 1MV JN and 4 MV KN Van de Graaff accelerators at the University of Notre Dame. TiN and implanted 14N targets. 15O; deduced levels, resonances, J, π, astrophysical S factors. Multichannel R-matrix analysis. Relevance to CNO cycle in stars.

doi: 10.1103/PhysRevC.93.055806
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2016MA26      Phys.Rev. C 93, 045811 (2016)

J.Marganiec, S.Beceiro Novo, S.Typel, C.Langer, C.Wimmer, H.Alvarez-Pol, T.Aumann, K.Boretzky, E.Casarejos, A.Chatillon, D.Cortina-Gil, U.Datta-Pramanik, Z.Elekes, Z.Fulop, D.Galaviz, H.Geissel, S.Giron, U.Greife, F.Hammache, M.Heil, J.Hoffman, H.Johansson, O.Kiselev, N.Kurz, K.Larsson, T.Le Bleis, Yu.A.Litvinov, K.Mahata, C.Muentz, C.Nociforo, W.Ott, S.Paschalis, R.Plag, W.Prokopowicz, C.Rodriguez-Tajes, D.M.Rossi, H.Simon, M.Stanoiu, J.Stroth, K.Summerer, A.Wagner, F.Wamers, H.Weick, M.Wiescher

Coulomb dissociation of 27P at 500 MeV/u

NUCLEAR REACTIONS Pb(27P, p26Si), E=491.3 MeV/nucleon, [27P secondary beam from 9Be(36Ar, X), E=615.5 MeV/nucleon using FRS at GSI]; measured breakup fragments, E(p), I(p), Eγ, Iγ, (fragment)γ-coin using DSSSDs, multi-wire drift Chambers, and spherical 4π array of 162 NaI(Tl) crystals. 27P; deduced invariant-mass spectrum for the Coulomb dissociation (CD) of 27P, proton resonance energies, Coulomb excitation σ, levels, multipolarity, J, π, astrophysical S factor. 26Si(p, γ), T9=0.01-10; deduced thermonuclear reaction rates. Comparisons with previous experimental data, structure of 27Mg mirror nucleus, and theoretical calculations.

doi: 10.1103/PhysRevC.93.045811
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2016MA42      Phys.Lett. B 759, 200 (2016)

J.Marganiec, F.Wamers, F.Aksouh, Yu.Aksyutina, H.Alvarez-Pol, T.Aumann, S.Beceiro Novo, C.A.Bertulani, K.Boretzky, M.J.G.Borge, M.Chartier, A.Chatillon, L.V.Chulkov, D.Cortina-Gil, H.Emling, O.Ershova, L.M.Fraile, H.O.U.Fynbo, D.Galaviz, H.Geissel, M.Heil, D.H.H.Hoffmann, J.Hoffmann, H.T.Johansson, B.Jonson, C.Karagiannis, O.A.Kiselev, J.V.Kratz, R.Kulessa, N.Kurz, C.Langer, M.Lantz, T.Le Bleis, R.Lemmon, Yu.A.Litvinov, K.Mahata, C.Muntz, T.Nilsson, C.Nociforo, G.Nyman, W.Ott, V.Panin, S.Paschalis, A.Perea, R.Plag, R.Reifarth, A.Richter, C.Rodriguez-Tajes, D.Rossi, K.Riisager, D.Savran, G.Schrieder, H.Simon, J.Stroth, K.Summerer, O.Tengblad, S.Typel, H.Weick, M.Wiescher, C.Wimmer

Coulomb and nuclear excitations of narrow resonances in 17Ne

NUCLEAR REACTIONS H, C, Pb(17Ne, 2p), E=500 MeV/nucleon; measured reaction products, Ep, Ip. 17Ne; deduced σ(E), excitation energies and σ for resolved resonances in 17Ne, B(E2). Comparison with available data.

doi: 10.1016/j.physletb.2016.05.073
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2016TA09      Phys.Rev. C 93, 055803 (2016)

R.Talwar, T.Adachi, G.P.A.Berg, L.Bin, S.Bisterzo, M.Couder, R.J.deBoer, X.Fang, H.Fujita, Y.Fujita, J.Gorres, K.Hatanaka, T.Itoh, T.Kadoya, A.Long, K.Miki, D.Patel, M.Pignatari, Y.Shimbara, A.Tamii, M.Wiescher, T.Yamamoto, M.Yosoi

Probing astrophysically important states in the 26Mg nucleus to study neutron sources for the s process

NUCLEAR REACTIONS 26Mg(α, α'), E=206 MeV; 22Ne(6Li, d)26Mg, E=82.3 MeV; measured Eα, Iα, E(d), I(d), σ(θ) using Grand Raiden (GR) spectrometer at RCNP-Osaka. 26Mg; deduced α-unbound resonance energies, levels, J, π, α-spectroscopic factors, resonance strengths. Angular distributions for inelastic scattering analyzed by coupled channel code PTOLEMY and for transfer reactions by FRESCO code. 22Ne(α, γ)26Mg, 22Ne(α, n)25Mg, T9=0.01-10; deduced astrophysical reaction rates from resonance parameters. Comparison with previous results. Relevance to slow neutron capture process (s process) in massive stars.

doi: 10.1103/PhysRevC.93.055803
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2015BU08      Phys.Rev.Lett. 114, 251102 (2015)

B.Bucher, X.D.Tang, X.Fang, A.Heger, S.Almaraz-Calderon, A.Alongi, A.D.Ayangeakaa, M.Beard, A.Best, J.Browne, C.Cahillane, M.Couder, R.J.deBoer, A.Kontos, L.Lamm, Y.J.Li, A.Long, W.Lu, S.Lyons, M.Notani, D.Patel, N.Paul, M.Pignatari, A.Roberts, D.Robertson, K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher, S.E.Woosley

First Direct Measurement of 12C(12C, n)23Mg at Stellar Energies

NUCLEAR REACTIONS 12C(12C, n), E=7.5, 9.5 MeV; measured reaction products, Eγ, Iγ, En, In; deduced yields, S-factors, astrophysical reaction rate. Comparison with available data.

doi: 10.1103/PhysRevLett.114.251102
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2015CH19      J.Phys.(London) G42, 055102 (2015)

L.C.Chamon, L.R.Gasques, G.P.A.Nobre, E.S.Rossi, Jr, R.J.de Boer, C.Seymour, M.Wiescher, G.G.Kiss

Evidence of a slight nuclear transparency in the alpha-nucleus systems

NUCLEAR REACTIONS 120,130Te(α, α'), E<15 MeV; calculated inelastic σ(θ). EMPIRE nuclear model code, comparison with available data.

doi: 10.1088/0954-3899/42/5/055102
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2015DE11      Phys.Rev. C 91, 045804 (2015)

R.J.de Boer, D.W.Bardayan, J.Gorres, P.J.LeBlanc, K.V.Manukyan, M.T.Moran, K.Smith, W.Tan, E.Uberseder, M.Wiescher, P.F.Bertone, A.E.Champagne, M.S.Islam

Low energy scattering cross section ratios of 14N(p, p)14N

NUCLEAR REACTIONS 14N(p, p), E=1-4 MeV; measured E(p), I(p), σ(θ, E) at Notre Dame Van de Graaff accelerator facility. 15O; deduced levels, resonances, l-transfers, J, π, resonance parameters, widths. R-matrix analysis. Discussed relevance of proton scattering data for constraining astrophysically important capture rate analyses.

doi: 10.1103/PhysRevC.91.045804
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2015MA09      Eur.Phys.J. A 51, 9 (2015)

J.Marganiec, F.Wamers, F.Aksouh, Yu.Aksyutina, H.Alvarez-Pol, T.Aumann, S.Beceiro Novo, K.Boretzky, M.J.G.Borge, M.Chartier, A.Chatillon, L.V.Chulkov, D.Cortina-Gil, H.Emling, O.Ershova, L.M.Fraile, H.O.U.Fynbo, D.Galaviz, H.Geissel, M.Heil, D.H.H.Hoffmann, J.Hoffmann, H.T.Johansson, B.Jonson, C.Karagiannis, O.A.Kiselev, J.V.Kratz, R.Kulessa, N.Kurz, C.Langer, M.Lantz, T.Le Bleis, R.Lemmon, Yu.A.Litvinov, K.Mahata, C.Muntz, T.Nilsson, C.Nociforo, G.Nyman, W.Ott, V.Panin, S.Paschalis, A.Perea, R.Plag, R.Reifarth, A.Richter, C.Rodriguez-Tajes, D.Rossi, K.Riisager, D.Savran, G.Schrieder, H.Simon, J.Stroth, K.Summerer, O.Tengblad, H.Weick, M.Wiescher, C.Wimmer, M.V.Zhukov

Studies of continuum states in 16Ne using three-body correlation techniques

NUCLEAR REACTIONS C(17Ne, n16Ne), E≈500 MeV/nucleon; measured reaction products using Si-strip detectors and separation by magnetic field of ALADIN magnet. 16N deduced resonance energies, widths of different channels, relative energy spectrum of the channels, levels, J, π, two- and three-body correlations.

doi: 10.1140/epja/i2015-15009-0
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2015NA14      Phys.Rev. C 92, 025804 (2015)

F.Naqvi, S.J.Quinn, A.Spyrou, A.Battaglia, M.Couder, P.A.DeYoung, A.C.Dombos, X.Fang, J.Gorres, A.Kontos, Q.Li, S.Lyons, D.Robertson, A.Simon, K.Smith, M.K.Smith, E.Stech, W.P.Tan, M.Wiescher

Proton capture cross section of 72Ge and astrophysical implications

NUCLEAR REACTIONS 72,74Ge(p, γ), E=1.8-3.6 MeV; measured Eγ, Iγ, σ(E) using γ-summing detector SuN at Notre Dame Tandem Van de Graff accelerator facility. Natural Ge target. Comparison with calculations using TALYS1.6 code and different combinations of optical model potentials (OMPs), nuclear level densities (NLDs), and γ-ray strength functions, and with data in standard astrophysical libraries BRUSLIB and REACLIB. Relevance to astrophysical p-process.

doi: 10.1103/PhysRevC.92.025804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2183.


2015QU01      Phys.Rev. C 92, 045805 (2015)

S.J.Quinn, A.Spyrou, A.Simon, A.Battaglia, M.Bowers, B.Bucher, C.Casarella, M.Couder, P.A.DeYoung, A.C.Dombos, J.Gorres, A.Kontos, Q.Li, A.Long, M.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, M.K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher

(α, γ) cross section measurements in the region of light p nuclei

NUCLEAR REACTIONS 74Ge, 90,92Zr(α, γ), E=9.5-12 MeV; measured Eγ, Iγ, σ(E) using the SuN detector and gamma-summing technique at Notre Dame Tandem Van de Graaff accelerator; deduced stellar reaction rates for 90Zr(α, γ) reaction. Nucleosynthesis of light p-process nuclei. Comparison with statistical model calculations using TALYS and NON-SMOKER codes.

doi: 10.1103/PhysRevC.92.045805
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2196.


2015SE08      Phys.Rev. C 91, 065803 (2015)

M.L.Sergi, C.Spitaleri, M.La Cognata, L.Lamia, R.G.Pizzone, G.G.Rapisarda, X.D.Tang, B.Bucher, M.Couder, P.Davies, R.deBoer, X.Fang, L.Lamm, C.Ma, M.Notani, S.O'Brien, D.Roberson, W.Tan, M.Wiescher, B.Irgaziev, A.Mukhamedzhanov, J.Mrazek, V.Kroha

Improvement of the high-accuracy 17O(p, α)14N reaction-rate measurement via the Trojan Horse method for application to 17O nucleosynthesis

NUCLEAR REACTIONS 2H(17O, α14N)n, E=41, 43.5 MeV; measured particle spectra, (14N)α-coin at LNS-Catania and NSL-Notre Dame accelerator facilities; deduced Q-value spectra, yields as function of 14N and α emission angles, E(14N-α) versus E(α-n) plots, neutron momentum distributions, (14N)α-coincidence yields for different neutron momentum ranges, differential σ(E) of the Trojan-Horse reaction. 18F; deduced parameters for the two resonance levels, resonance strengths for the 65-keV resonance. 17O(p, α)14N; deduced reaction rates via Trojan Horse Method (THM). 18F; compiled resonance energies, J, π, Γp, Γα, Γγ for 24 resonances from -3.12 keV to 1684.5 keV. Relevance to destruction of 17O and the formation of 18F in stellar sites.

doi: 10.1103/PhysRevC.91.065803
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2015SI13      Phys.Rev. C 92, 025806 (2015)

A.Simon, M.Beard, A.Spyrou, S.J.Quinn, B.Bucher, M.Couder, P.A.DeYoung, A.C.Dombos, J.Gorres, A.Kontos, A.Long, M.T.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher

Systematic study of (α, γ) reactions for stable nickel isotopes

NUCLEAR REACTIONS 58,60,61,62,64Ni(α, γ), E=5-9 MeV; measured Eγ, Iγ, σ(E) using γ-summing detector SuN at Notre Dame tandem (FN) Pelletron accelerator facility; deduced astrophysical reaction rates. Comparison with available experimental data, and with Hauser-Feshbach calculations using TALYS 1.6 code with different combinations of α-optical potentials. nuclear level densities, and E1 γ-ray strength functions. Comparisons with results in NON-SMOKER and BRUSLIB databases.

doi: 10.1103/PhysRevC.92.025806
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2181.


2015WI03      Europhys.Lett. 109, 62001 (2015)

M.Wiescher

Goals and challenges in experimental nuclear astrophysics

doi: 10.1209/0295-5075/109/62001
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2014BE34      Phys.Rev. C 90, 034619 (2014)

M.Beard, E.Uberseder, R.Crowter, M.Wiescher

Comparison of statistical model calculations for stable isotope neutron capture

NUCLEAR REACTIONS 36S, 37Cl, 38,40Ar, 39,40,41K, 40,42,43,44,46,48Ca, 45Sc, 46,47,48,49,50Ti, 196,198,199,200,201,202,204Hg, 203,205Tl, 204,206,207,208Pb(n, γ), E at kT=30 keV; calculated Maxwellian-averaged neutron capture cross sections (MACS) at 30 keV for 340 stable isotopes with N=20-127, Z=16-82 using statistical Hauser-Feshbach model codes TALYS and NON-SMOKER, and two new HF codes, CIGAR and SAPPHIRE. Comparison with data in KAdoNiS database, and other available experimental data. Note that only 32 isotopes out of a total of 340 isotopes studied are listed here.

doi: 10.1103/PhysRevC.90.034619
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2014BI20      Astrophys.J. 787, 1 (2014)

S.Bisterzo, C.Travaglio, R.Gallino, M.Wiescher, F.Kappeler

Galactic chemical evolution and solar s-process abundances: dependence on the 13C-pocket structure

NUCLEAR REACTIONS 80,82,83,84,86Kr, Kr, 85,87Rb, Rb, 86,87,88Sr, Sr, 89Y, Y, 90,91,92,94,96Zr, Zr, 93Nb, Nb, 94,95,96,97,98,100Mo, Mo, 99,100,101,102,104Ru, Ru, 103Rh, Rh, 104,105,106,108,110Pd, Pd, 107,109Ag, Ag, 108,110,111,112,113,114,116Cd, Cd, 113,115In, In, 114,115,116,117,118,119,120,122,124Sn, Sn, 121,123Sb, Sb, 122,123,124,125,126,128Te, Te, 127I, I, 128,129,130,131,132,134Xe, Xe, 133Cs, Cs, 134,135,136,137,138Ba, Ba, 139La, La, 140,142Ce, Ce, 141Pr, Pr, 142,143,144,145,146,148Nd, Nd, 147,148,149,150,152,154Sm, Sm, 151,153Eu, Eu, 152,154,155,156,157,158,160Gd, Gd, 159Tb, Tb, 160,161,162,163,164Dy, Dy, 165Ho, Ho, 164,166,167,168,170Er, Er, 169Tm, Tm, 170,171,172,173,174,176Yb, Yb, 175,176Lu, Lu, 176,177,178,179,180Hf, Hf, 180,181Ta, Ta, 180,182,183,184,186W, W, 185,187Re, Re, 186,187,188,189,190,192Os, Os, 191,193Ir, Ir, 192,194,195,196,198Pt, Pt, 197Au, Au, 198,199,200,201,202,204Hg, Hg, 203,205Tl, Tl, 204,206,207,208Pb, Pb, 209Bi, Bi(n, γ), E ∼ 30 keV; analyzed available data; deduced s-process abundances.

doi: 10.1088/0004-637x/787/1/10
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2014CH06      J.Phys.(London) G41, 035101 (2014)

L.C.Chamon, L.R.Gasques, L.F.M.Alves, V.Guimaraes, P.Descouvemont, R.J.de Boer, M.Wiescher

Effect of the inelastic couplings on the scattering of alpha particles by 12C at low energies

NUCLEAR REACTIONS 12C(α, α), (α, X)16O, E=7.85-10.42 MeV; analyzed available data, σ and S-factors; deduced the effect of the coupling of the first 2+ state in 12C.

doi: 10.1088/0954-3899/41/3/035101
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2014DE13      Phys.Rev. C 89, 055802 (2014)

R.J.de Boer, A.Best, J.Gorres, K.Smith, W.Tan, M.Wiescher, R.Raut, G.Rusev, A.P.Tonchev, W.Tornow

Photoneutron strengths in 26Mg at energies of astrophysical interest

NUCLEAR REACTIONS 26Mg(polarized γ, n), [circularly polarized γ beam produced in Compton backscattering of laser photons from E=498-548 MeV electrons], E=10.80-12.05 MeV; measured Eγ, Iγ, E(n), I(n), time-of-flight spectra, photoneutron σ(E) at HIγS facility of TUNL. 26Mg; deduced level energies above S(n), resonance strengths, comparison with 25Mg(n, γ)26Mg by R-matrix analysis. Relevance to astrophysically important 22Ne(α, n)25Mg reaction.

doi: 10.1103/PhysRevC.89.055802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0197. Data from this article have been entered in the XUNDL database. For more information, click here.


2014DE32      Phys.Rev. C 90, 035804 (2014)

R.J.de Boer, J.Gorres, K.Smith, E.Uberseder, M.Wiescher, A.Kontos, G.Imbriani, A.Di Leva, F.Strieder

Monte Carlo uncertainty of the 3He (α, γ)7Be reaction rate

NUCLEAR REACTIONS 3He(α, γ)7Be, E(cm)=0.09-3.2 MeV; analyzed ten individual experimental measurements to extract the uncertainties on the cross section and corresponding reaction rate through a global R-matrix analysis using AZURE2 computer code; deduced astrophysical S factor and reaction rates. Relevance to neutrino production in our sun through the pp-II and pp-III chains.

doi: 10.1103/PhysRevC.90.035804
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2014DE41      Phys.Lett. B 738, 453 (2014)

M.Del Santo, Z.Meisel, D.Bazin, A.Becerril, B.A.Brown, H.Crawford, R.Cyburt, S.George, G.F.Grinyer, G.Lorusso, P.F.Mantica, F.Montes, J.Pereira, H.Schatz, K.Smith, M.Wiescher

β-delayed proton emission of 69Kr and the 68Se rp-process waiting point

RADIOACTIVITY 69Kr(β+p) [from Be(78Kr, X)69Kr, E not given]; measured reaction products, Ep, Ip, Eβ, Iβ, Eγ, Iγ. 69Br; deduced T1/2, proton separation energy, proton emission decay scheme, γ-ray energies. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2014.10.023
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2014GL02      Phys.Rev. C 89, 065808 (2014)

J.Glorius, K.Sonnabend, J.Gorres, D.Robertson, M.Knorzer, A.Kontos, T.Rauscher, R.Reifarth, A.Sauerwein, E.Stech, W.Tan, T.Thomas, M.Wiescher

Experimental cross sections of 165Ho(α, n)168Tm and 166Er(α, n)169Yb for optical potential studies relevant for the astrophysical γ process

NUCLEAR REACTIONS 165Ho, 166Er(α, n), E=10.5-15 MeV; measured Eγ, Iγ, σ(E) by activation technique using Tandem accelerator at NSL-Notre Dame. Comparison with predictions from Hauser-Feshbach calculations using TALYS and SMARAGD codes, and with previous experimental results; analyzed α-nucleus optical potential for simulations of astrophysical γ process.

doi: 10.1103/PhysRevC.89.065808
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2119.


2014MA26      Acta Phys.Pol. B45, 229 (2014)

J.Marganiec, F.Wamers, F.Aksouh, Y.Aksyutina, H.Alvarez-Pol, T.Aumann, S.Beceiro, C.Bertulani, K.Boretzky, M.J.G.Borge, M.Chartier, A.Chatillon, L.Chulkov, D.Cortina-Gil, I.Egorova, H.Emling, O.Ershova, C.Forssen, L.M.Fraile, H.Fynbo, D.Galaviz, H.Geissel, L.Grigorenko, M.Heil, D.H.H.Hoffmann, J.Hoffmann, H.Johansson, B.Jonson, M.Karakoc, C.Karagiannis, O.Kiselev, J.V.Kratz, R.Kulessa, N.Kurz, C.Langer, M.Lantz, K.Larsson, T.Le Bleis, R.Lemmon, Yu.A.Litvinov, K.Mahata, C.Muntz, T.Nilsson, C.Nociforo, G.Nyman, W.Ott, V.Panin, Yu.Parfenova, S.Paschalis, A.Perea, R.Plag, R.Reifarth, A.Richter, K.Riisager, C.Rodriguez-Tajes, D.Rossi, G.Schrieder, N.Shulgina, H.Simon, J.Stroth, K.Summerer, J.Taylor, O.Tengblad, E.Tengborn, H.Weick, M.Wiescher, C.Wimmer, M.Zhukov

Study of the 15O(2p, γ)17Ne Cross Section by Coulomb Dissociation of 17Ne for the rp Process of Nucleosynthesis

NUCLEAR REACTIONS Pb(17Ne, 2p)15O, E=500 MeV/nucleon; measured reaction products, Eγ, Iγ, Ep, Ip; deduced σ, σ(E), resonances. Comparison with theoretical calculations, R3BROOT package.

doi: 10.5506/APhysPolB.45.229
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2014MO35      Nucl.Instrum.Methods Phys.Res. A767, 359 (2014)

D.J.Mountford, R.J.de Boer, P.Descouvemont, A.St.J.Murphy, E.Uberseder, M.Wiescher

Evaluation of the implementation of the R-matrix formalism with reference to the astrophysically important 18F(pα)15O reaction

NUCLEAR REACTIONS 18F(p, α), E(cm)=0.6-1.6 MeV; calculated resonance parameter widths, σ(θ), S-factors. R-matrix formalism, AZURE code.

doi: 10.1016/j.nima.2014.08.047
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2014QU01      Phys.Rev. C 89, 054611 (2014)

S.J.Quinn, A.Spyrou, E.Bravo, T.Rauscher, A.Simon, A.Battaglia, M.Bowers, B.Bucher, C.Casarella, M.Couder, P.A.DeYoung, A.C.Dombos, J.Gorres, A.Kontos, Q.Li, A.Long, M.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, M.K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher

Measurement of the 58Ni(α, γ)62Zn reaction and its astrophysical impact

NUCLEAR REACTIONS 58Ni(α, γ)62Zn, E=5.5-9.5 MeV; measured Eγ, Iγ, σ(E) using Summing NaI(Tl) (SuN) detector at NSL-Notre Dame facility; deduced astrophysical reaction rates. Comparison with predictions from statistical Hauser-Feshbach model using SMARAGD code. Discussed Astrophysical implications and elemental abundances.

doi: 10.1103/PhysRevC.89.054611
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2116.


2014QU04      Nucl.Instrum.Methods Phys.Res. A 757, 62 (2014)

S.J.Quinn, A.Spyrou, A.Simon, A.Battaglia, M.Bowers, B.Bucher, C.Casarella, M.Couder, P.A.Deyoung, A.C.Dombos, J.P.Greene, J.Gorres, A.Kontos, Q.Li, A.Long, M.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, M.K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher

First application of the technique in inverse kinematics

NUCLEAR REACTIONS 1H(27Al, γ), 1H(58Ni, γ), 27Al(p, γ), 58Ni(p, γ), E=956 keV-1.5 GeV; measured products, Eγ, Iγ; deduced resonance parameters. Data were imported from EXFOR entry C2123.

doi: 10.1016/j.nima.2014.05.020
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2123.


2014SC01      Nature(London) 505, 62 (2014)

H.Schatz, S.Gupta, P.Moller, M.Beard, E.F.Brown, A.T.Deibel, L.R.Gasques, W.R.Hix, L.Keek, R.Lau, A.W.Steiner, M.Wiescher

Strong neutrino cooling by cycles of electron capture and β- decay in neutron star crusts

NUCLEAR STRUCTURE 105Zr; calculated single-particle energy levels, J, π, hexadecapole deformation parameters.

doi: 10.1038/nature12757
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2013BE11      Phys.Rev. C 87, 045805 (2013)

A.Best, M.Beard, J.Gorres, M.Couder, R.deBoer, S.Falahat, R.T.Guray, A.Kontos, K.-L.Kratz, P.J.LeBlanc, Q.Li, S.O'Brien, N.Ozkan, M.Pignatari, K.Sonnabend, R.Talwar, W.Tan, E.Uberseder, M.Wiescher

Measurement of the reaction 17O(α, n)20Ne and its impact on the s process in massive stars

NUCLEAR REACTIONS 17O(α, n), E=800-2300 keV; measured Eγ, Iγ, E(n), I(n), yields as function of incident Eα for (α, n0) and (α, n1) channels; deduced R-matrix parameters, S factors, reaction rates. 21Ne; deduced levels, resonances, J, π, width, resonance strengths. R-matrix analyses. 17O(α, n), (α, γ), E at 0.1 to 10 GK; comparison of experimental and theoretical (NACRE, CF88/1000) reaction rates. Hauser-Feshbach theory. Astrophysical implications for the s-process, and elemental abundance.

doi: 10.1103/PhysRevC.87.045805
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2007. Data from this article have been entered in the XUNDL database. For more information, click here.


2013BE12      Phys.Rev. C 87, 045806 (2013)

A.Best, S.Falahat, J.Gorres, M.Couder, R.deBoer, R.T.Guray, A.Kontos, K.-L.Kratz, P.J.LeBlanc, Q.Li, S.O'Brien, N.Ozkan, K.Sonnabend, R.Talwar, E.Uberseder, M.Wiescher

Measurement of the reaction 18O(α, n)21Ne

NUCLEAR REACTIONS 18O(α, n), E=851-2300 keV; measured Eγ, Iγ, E(n), I(n), yields as function of incident Eα for (α, n0) and (α, n1) channels; deduced R-matrix parameters, S factors, reaction rates. 22Ne; deduced levels, resonances, J, π, width, resonance strengths. R-matrix analyses. 18O(α, n), (α, γ), E at 0.1 to 10 GK; comparison of experimental and theoretical (NACRE, CF88) reaction rates. Hauser-Feshbach theory.

doi: 10.1103/PhysRevC.87.045806
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2009. Data from this article have been entered in the XUNDL database. For more information, click here.


2013CH39      Bull.Rus.Acad.Sci.Phys. 77, 890 (2013); Izv.Akad.Nauk RAS, Ser.Fiz 77, 978 (2013)

A.I.Chugunov, A.V.Afanasjev, M.Beard, M.Wiescher, D.G.Yakovlev

Simple approximation of cross sections for nuclear reactions involving Z = 3-12, 14 nuclei

NUCLEAR REACTIONS Be, B, C, N, O, F, Ne, Na, Mg, Si(Be, X), B, C, N, O, F, Ne, Na, Mg, Si(B, X), C, N, O, F, Ne, Na, Mg, Si(C, X), N, O, F, Ne, Na, Mg, Si(N, X), O, F, Ne, Na, Mg, Si(O, X), F, Ne, Na, Mg, Si(F, X), Ne, Na, Mg, Si(Ne, X), Na, Mg, Si(Na, X), Mg, Si(Mg, X), Si(Si, X), E not given; San Paulo potential, below the Coulomb barrier energies.

doi: 10.3103/S1062873813070083
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2013DE03      Phys.Rev. C 87, 015802 (2013)

R.J.de Boer, J.Gorres, G.Imbriani, P.J.LeBlanc, E.Uberseder, M.Wiescher

R-matrix analysis of 16O compound nucleus reactions

NUCLEAR REACTIONS 15N(p, γ)16O, 15N(p, α)12C, 15N(p, p), E<1.8 MeV; 12C(α, p)15N, 12C(α, α), 12C(α, γ)16O, E=6.8-8.3 MeV; analyzed S factors, σ(E, θ), yields for all available reaction channels simultaneously using a multichannel R-matrix code AZURE. 16O; deduced R-matrix description for the broad level structure.

doi: 10.1103/PhysRevC.87.015802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1825.


2013GU02      Phys.Rev. C 87, 012801 (2013)

M.Gulino, C.Spitaleri, X.D.Tang, G.L.Guardo, L.Lamia, S.Cherubini, B.Bucher, V.Burjan, M.Couder, P.Davies, R.deBoer, X.Fang, V.Z.Goldberg, Z.Hons, V.Kroha, L.Lamm, M.La Cognata, C.Li, C.Ma, J.Mrazek, A.M.Mukhamedzhanov, M.Notani, S.O'Brien, R.G.Pizzone, G.G.Rapisarda, D.Roberson, M.L.Sergi, W.Tan, I.J.Thompson, M.Wiescher

Suppression of the centrifugal barrier effects in the off-energy-shell neutron + 17O interaction

NUCLEAR REACTIONS 2H(17O, α14C), E=41, 43.5 MeV; measured α and 14C particle spectra, (14C)α-coin, angular distributions, yields using position-sensitive silicon detectors (PSD) at LNS, Catania, and at NSL, Notre Dame. CD2 target; deduced momentum distributions, Q value. DWBA analysis. 17O(n, α)14C, E(cm)=0-350 keV; deduced yields, angular distributions, neutron from quasifree breakup of deuteron. 18O; deduced resonances, J, π, and excitation functions. Trojan Horse method (THM), and suppression of centrifugal barrier. Comparison with previous studies. Relevance to neutron-induced reactions in nuclear reactors, and nucleosynthesis in astrophysics.

doi: 10.1103/PhysRevC.87.012801
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2013HE21      Phys.Lett. B 725, 287 (2013)

J.J.He, S.Z.Chen, C.E.Rolfs, S.W.Xu, J.Hu, X.W.Ma, M.Wiescher, R.J.de Boer, T.Kajino, M.Kusakabe, L.Y.Zhang, S.Q.Hou, X.Q.Yu, N.T.Zhang, G.Lian, Y.H.Zhang, X.H.Zhou, H.S.Xu, G.Q.Xiao, W.L.Zhan

A drop in the 6Li(p, γ)7Be reaction at low energies

NUCLEAR REACTIONS 6Li(p, γ), E(cm)<1 MeV; measured reaction products, Eγ, Iγ; deduced S-factors, positive-parity resonance. Comparison with available data, SUSY assisted Big-bang Nucleosynthesis models.

doi: 10.1016/j.physletb.2013.07.044
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetS0083. Data from this article have been entered in the XUNDL database. For more information, click here.


2013KO18      Phys.Rev. C 87, 065804 (2013)

A.Kontos, E.Uberseder, R.deBoer, J.Gorres, C.Akers, A.Best, M.Couder, M.Wiescher

Astrophysical S factor of 3He (α, γ)7Be

NUCLEAR REACTIONS 3He(α, γ)7Be, E=530-2550 keV; measured Eγ, Iγ, particle spectra, radiative capture σ at NSL facility in Notre Dame; deduced astrophysical S(E) factor, branching ratio, gamma and proton widths, reaction rates at T=0.01 to 10 GK. R-matrix analyses for 3He(α, α)3He and 3He(α, γ)7Be data. Discussed astrophysical implications. Comparison with previous experimental studies.

doi: 10.1103/PhysRevC.87.065804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2032.


2013QU01      Phys.Rev. C 88, 011603 (2013)

S.J.Quinn, A.Spyrou, A.Simon, A.Battaglia, M.Couder, P.A.DeYoung, A.C.Dombos, X.Fang, J.Gorres, A.Kontos, Q.Li, S.Lyons, B.S.Meyer, G.F.Peaslee, D.Robertson, K.Smith, M.K.Smith, E.Stech, W.P.Tan, X.D.Tang, M.Wiescher

Probing the production mechanism of the light p-process nuclei

NUCLEAR REACTIONS 74Ge(p, γ)75As, E=1.6-4.2 MeV; measured Eγ, Iγ, σ(E) using the NSCL SuN detector at Notre Dame facility; deduced astrophysical S(E) factors, reaction rates at T9=0.10-10.0, cumulative mass fraction of 74Se in a Type II Supernova model. Comparison with previous experimental data, and with theoretical predictions using NON-SMOKER and TALYS nuclear reaction codes.

doi: 10.1103/PhysRevC.88.011603
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2046.


2013SI11      Phys.Rev. C 87, 055802 (2013)

A.Simon, A.Spyrou, T.Rauscher, C.Frohlich, S.J.Quinn, A.Battaglia, A.Best, B.Bucher, M.Couder, P.A.DeYoung, X.Fang, J.Gorres, A.Kontos, Q.Li, L.-Y.Lin, A.Long, S.Lyons, A.Roberts, D.Robertson, K.Smith, M.K.Smith, E.Stech, B.Stefanek, W.P.Tan, X.D.Tang, M.Wiescher

Systematic study of (p, γ) reactions on Ni isotopes

NUCLEAR REACTIONS 58,60,61,62,64Ni(p, γ), E=2.0-6.0 MeV; measured Eγ, Iγ, σ(E) using the NSCL-SuN gamma detector utilizing γ-summing technique at Notre Dame; deduced sensitivity of the reaction σ(E) with variation of γ- and particle width. Comparison with theoretical predictions from NON-SMOKER and SMARAGD computer code calculations, and with previous experimental data. Predicted astrophysical reaction rates on all stable nickel isotopes including that for 56Ni(p, γ)57Cu.

doi: 10.1103/PhysRevC.87.055802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2026.


2013SI35      Nucl.Instrum.Methods Phys.Res. A 703, 16 (2013)

A.Simon, S.J.Quinn, A.Spyrou, A.Battaglia, I.Beskin, A.Best, B.Bucher, M.Couder, P.A.Deyoung, X.Fang, J.Gorres, A.Kontos, Q.Li, S.N.Liddick, A.Long, S.Lyons, K.Padmanabhan, J.Peace, A.Roberts, D.Robertson, K.Smith, M.K.Smith, E.Stech, B.Stefanek, W.P.Tan, X.D.Tang, M.Wiescher

SuN: Summing NaI(Tl) gamma-ray detector for capture reaction measurements

NUCLEAR REACTIONS 27Al(p, γ), E=2.3-3.9 MeV; measured products, Eγ, Iγ; deduced resonance parameters. Data were imported from EXFOR entry C1967.

doi: 10.1016/j.nima.2012.11.045
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1967.


2013SP04      Phys.Rev. C 88, 045802 (2013)

A.Spyrou, S.J.Quinn, A.Simon, T.Rauscher, A.Battaglia, A.Best, B.Bucher, M.Couder, P.A.DeYoung, A.C.Dombos, X.Fang, J.Gorres, A.Kontos, Q.Li, L.Y.Lin, A.Long, S.Lyons, B.S.Meyer, A.Roberts, D.Robertson, K.Smith, M.K.Smith, E.Stech, B.Stefanek, W.P.Tan, X.D.Tang, M.Wiescher

Measurement of the 90, 92Zr(p, γ)91, 93Nb reactions for the nucleosynthesis of elements near A=90

NUCLEAR REACTIONS 90,92Zr(p, γ)91Nb/93Nb, E=2.0-5.0 MeV; measured Eγ, Iγ, σ(E) using NSCL SuN detector at Notre Dame accelerator facility; deduced astrophysical S factors, reaction rates, sensitivity of reaction to widths in Hauser-Feshbach model. Comparison with standard NON-SMOKER model, and two TALYS calculations. Relevance to synthesis and abundances of light p nuclei.

doi: 10.1103/PhysRevC.88.045802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2065.


2012AF01      Phys.Rev. C 85, 054615 (2012)

A.V.Afanasjev, M.Beard, A.I.Chugunov, M.Wiescher, D.G.Yakovlev

Large collection of astrophysical S factors and their compact representation

NUCLEAR REACTIONS Be(Be, X), (B, X), (C, X), (N, X), (O, X), (F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), B(B, X), (C, X), (N, X), (O, X), (F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), C(C, X), (N, X), (F, X), (O, X), (Ne, X), (Na, X), (Mg, X), (Si, X), N(N, X), (O, X), (F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), O(O, X), (F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), F(F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), Ne(Ne, X), (Na, X), (Mg, X), (Si, X), Na(Na, X), (Mg, X), (Si, X), Mg(Mg, X), (Si, X), Si(Si, X), E<39.8 MeV; calculated astrophysical S factors as function of incident energy for A=8-14 Be, A=9-21 for B, A=10-24 for C, A=11-27 for N, A=12-28 for O, A=17-29 for F, A=18-40 for Ne, A=19-43 for Na, A=20-46 for Mg and A=24-52 for Si for a database of 5000 nonresonant fusion reactions. Sao Paulo method and the barrier penetration model. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.054615
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2012AL11      Phys.Rev. C 86, 025801 (2012); Pub.Note. Phys.Rev. C 86, 029901 (2012)

S.Almaraz-Calderon, W.P.Tan, A.Aprahamian, B.Bucher, A.Roberts, M.Wiescher, C.R.Brune, T.N.Massey, N.Ozkan, R.T.Guray, H.Mach

Level structure of 18Ne and its importance in the 14O(α, p)17F reaction rate

NUCLEAR REACTIONS 16O(3He, n), E=15 MeV; measured neutron and charged particle spectra, (particle)n-coin, neutron time-of-flight spectrum, p(θ), branching ratios for proton, 2p and α decays of excited states. 18Ne; deduced levels, resonances, J, π, decay modes, widths. 14,16O, 17F; populated g.s. from p, 2p and α decays of 18Ne resonances, and first excited state in 17F from p decay of 18Ne resonances. 14O(α, p)17F, T=0.1-5 GK; calculated reaction rates of astrophysical interest for Hot CNO cycles and their breakout paths towards the rp process. Comparison with previous studies.

doi: 10.1103/PhysRevC.86.025801
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2012AL23      Phys.Rev. C 86, 065805 (2012); Erratum Phys.Rev. C 88, 059902 (2013)

S.Almaraz-Calderon, W.P.Tan, A.Aprahamian, M.Beard, G.P.A.Berg, B.Bucher, M.Couder, J.Gorres, S.O'Brien, D.Patel, A.Roberts, K.Sault, M.Wiescher, C.R.Brune, T.N.Massey, K.Fujita, K.Hatanaka, D.Ishiwaka, H.Matsubara, H.Okamura, H.J.Ong, Y.Sakemi, Y.Shimizu, T.Suzuki, Y.Tameshige, A.Tamii, J.Zenihiro, T.Kubo, Y.Namiki, Y.Ohkuma, Y.Shimbara, S.Suzuki, R.Watanabe, R.Yamada, T.Adachi, Y.Fujita, H.Fujita, M.Dozono, T.Wakasa

Level structure of 30S and its importance in the 26Si(α, p)29P and 29P(p, γ)30S reaction rates

NUCLEAR REACTIONS 32S(p, t), E=98.7 MeV; measured triton spectra at two angles using Grand Raiden (GR) magnetic spectrometer at RCNP facility. 28Si(3He, n), E=15 MeV; measured neutron (TOF) spectra, charged-particle spectra, (charged-particle)n-coin, angular distributions using LESA array and scintillation detectors at Notre Dame NSL facility. 30S; deduced levels, proton- and α- unbound levels, J, π, proton branching ratios, partial proton widths. DWBA analysis. Comparison with several previous experimental studies. 29P(p, γ)30S, 26Si(α, p)29P, T9=0.01-10 GK; deduced astrophysical reaction rates. Comparison with previous theoretical calculations. Contribution of resonances to total reaction rates.

doi: 10.1103/PhysRevC.86.065805
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2012BE22      Phys.Rev. C 85, 065808 (2012)

M.Beard, S.Frauendorf, B.Kampfer, R.Schwengner, M.Wiescher

Photonuclear and radiative-capture reaction rates for nuclear astrophysics and transmutation: 92-100Mo, 88Sr, 90Zr, and 139La

NUCLEAR REACTIONS 92,94,96,98,100Mo, 88Sr, 90Zr, 139La(γ, n), (γ, p), (γ, α), (n, γ), (p, γ), (α, γ), E<16 MeV; calculated γ strength functions, σ(E), stellar reaction rates. Statistical model code TALYS, single Lorentzian (SLO), double Lorentzian (DLO), and generalized Lorentzian (GLO) calculations. Enhancement of radiative capture reaction cross sections by pygmy resonances in 88Sr, 90Zr and 139La. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.065808
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2012BE55      J.Phys.:Conf.Ser. 387, 012003 (2012)

G.P.A.Berg, Y.Fujita, J.Gorres, M.N.Harakeh, K.Hatanaka, A.Long, R.Neveling, F.D.Smit, R.Talwar, A.Tamii, M.Wiescher

High precision measurements for the rp-process

NUCLEAR REACTIONS 38Ca(α, p), E not given; measured Ep, Ip(θ). 40Ca(p, t), E=100 MeV; measured E(t), I(t, θ); deduced triton spectrum. 46Ti(α, 8He), E=206 MeV; measured E(particle), I(particle, θ). To be deduced rp-process reaction rates.

doi: 10.1088/1742-6596/387/1/012003
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2012DE06      Phys.Rev. C 85, 038801 (2012)

R.J.de Boer, P.J.LeBlanc, S.Falahat, G.Imbriani, J.Gorres, S.O'Brien, E.Uberseder, M.Wiescher

Elastic scattering of protons from 15N

NUCLEAR REACTIONS 15N(p, p), (p, α), E=0.6-1.8 MeV; measured particle spectra, σ(E, θ), yields. 16O; deduced resonances, levels, J, π, widths. R-matrix analysis. Comparison with previous studies. Relevance to 15N(p, γ)16O reaction cross sections at stellar energies.

doi: 10.1103/PhysRevC.85.038801
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2012DE08      Phys.Rev. C 85, 045804 (2012)

R.J.de Boer, A.Couture, R.Detwiler, J.Gorres, P.Tischhauser, E.Uberseder, C.Ugalde, E.Stech, M.Wiescher, R.E.Azuma

Measurement of elastic 12C + α scattering: Above the proton separation energy

NUCLEAR REACTIONS 12C(α, α), E=2.6-8.2 MeV; measured Eα, Iα, σ(E, θ). 12C(α, α'), (α, p), E=6.6-8.2 MeV; analyzed σ(E, θ) data. 16O; deduced resonances, levels, J, π, α and proton widths. R-matrix analysis. Relevance to CNO cycle.

doi: 10.1103/PhysRevC.85.045804
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2012IM02      Phys.Rev. C 85, 065810 (2012), Erratum Phys.Rev. C 86, 039902 (2012)

G.Imbriani, R.J.de Boer, A.Best, M.Couder, G.Gervino, J.Gorres, P.J.LeBlanc, H.Leiste, A.Lemut, E.Stech, F.Strieder, E.Uberseder, M.Wiescher

Measurement of γ rays from 15N(p, γ)16O cascade and 15N(p, α1γ)12C reactions

NUCLEAR REACTIONS 15N(p, γ)16O, 15N(p, αγ)12C, E=0.14-1.80 MeV; measured Eγ, Iγ, S factors, cross section. 12C, 16O; deduced levels, J, π, widths. R-matrix analysis. Comparison with previous studies.

doi: 10.1103/PhysRevC.85.065810
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2012KO41      Phys.Rev. C 86, 055801 (2012); Erratum Phys.Rev. C 88, 029905 (2013)

A.Kontos, J.Gorres, A.Best, M.Couder, R.deBoer, G.Imbriani, Q.Li, D.Robertson, D.Schurmann, E.Stech, E.Uberseder, M.Wiescher

Proton capture on 17O and its astrophysical implications

NUCLEAR REACTIONS 17O(p, γ)18F, E(cm)=345-1700 keV, measured Eγ, Iγ, γ(θ), excitation functions, σ(E). 18F; deduced levels, proton resonances, J, π, γ-branching ratios, resonance strengths, ANC, spectroscopic factors, proton, alpha and gamma widths, astrophysical reaction rates and S factors. R-matrix analysis. Comparison with literature values. Relevance to hydrogen-burning nucleosynthesis.

doi: 10.1103/PhysRevC.86.055801
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