NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = J.Gorres Found 190 matches. Showing 1 to 100. [Next]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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
2012KI15 J.Phys.:Conf.Ser. 337, 012029 (2012) G.G.Kiss, P.Mohr, Zs.Fulop, Gy.Gyurky, Z.Elekes, J.Farkas, E.Somorjai, D.Galaviz, R.T.Guray, N.Ozkan, C.Yalcin, J.Gorres Investigating the variation of elastic alpha scattering cross sections in the A ∼ 100 region NUCLEAR REACTIONS 110,116Cd(α, α), E=16.14, 19.46 MeV; measured Eα, Iα(θ); deduced σ(θ); calculated σ(θ) using optical model with various parameters sets.
doi: 10.1088/1742-6596/337/1/012029
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
2012PA03 Phys.Rev. C 85, 028801 (2012) A.Palumbo, W.P.Tan, J.Gorres, M.Wiescher, N.Ozkan, R.T.Guray, C.Yalcin Measurement of 120Te(α, n) cross sections relevant to the astrophysical p process NUCLEAR REACTIONS 120Te(α, n), E(cm)=9.99, 10.14, 10.63 MeV; measured Eγ, Iγ, cross section by activation technique; deduced S factor. Comparison with Hauser-Feshbach (HF) calculations using CIGAR computer code, and TALYS code.
doi: 10.1103/PhysRevC.85.028801
2012PA08 Phys.Rev. C 85, 035808 (2012), Erratum Phys.Rev. C 88, 039902 (2013) A.Palumbo, W.P.Tan, J.Gorres, A.Best, M.Couder, R.Crowter, R.J.de Boer, S.Falahat, P.J.LeBlanc, H.Y.Lee, S.O'Brien, E.Strandberg, M.Wiescher, J.P.Greene, Zs.Fulop, G.G.Kiss, E.Somorjai, N.Ozkan, G.Efe, R.T.Guray Systematic study of the α-optical potential via elastic scattering near the Z=50 region for p-process nuclei NUCLEAR REACTIONS 106Cd, 118Sn, 120,124,126,128,130Te(α, α), E=17-27 MeV; measured Eα, Iα, σ(E, θ). 106Cd, 112Sn(α, γ), E(cm)=7-12.5 MeV; 106Cd, 120Te(α, n), E(cm)=9.7-12.5 MeV; 118Sn(α, n), E=11-16.5 MeV; 106Cd(α, p), E(cm)=8.6-10.3 MeV; 112Sn(α, p), E(cm)=9.2-12.0 MeV; deduced σ and S factors relevant to p-process nuclei. Optical model analysis. HF statistical model calculations. Comparisons with other measurements.
doi: 10.1103/PhysRevC.85.035808
2012RO13 Phys.Rev. C 85, 045810 (2012) D.Robertson, J.Gorres, P.Collon, M.Wiescher, H.-W.Becker New measurement of the astrophysically important 40Ca(α, γ)44Ti reaction NUCLEAR REACTIONS 40Ca(α, γ)44Ti, E=3.0-4.6 MeV; measured Eγ, Iγ, σ(E). 44Ti; deduced α resonances, levels, resonance strengths, reaction rates of astrophysical interest. Comparison with previous studies and theoretical model calculations.
doi: 10.1103/PhysRevC.85.045810
2011BE17 Phys.Rev. C 83, 052802 (2011) A.Best, J.Gorres, M.Couder, R.deBoer, S.Falahat, A.Kontos, P.J.LeBlanc, Q.Li, S.O'Brien, K.Sonnabend, R.Talwar, E.Uberseder, M.Wiescher First direct measurement of resonance strengths in 17O(α, γ)21Ne NUCLEAR REACTIONS 17O(α, γ), E=750-1650 keV; measured Eγ, Iγ. 21Ne; deduced resonances, resonance strengths, levels, J, π, γ-branching ratios. Implications for neutron poisoning efficiency of 16O in the weak s-process. Comparison with previous experimental data, Caughlan-Fowler reaction rates, and calculated rates based on a microscopic three-cluster model of Descouvemont.
doi: 10.1103/PhysRevC.83.052802
2011KI15 Phys.Rev. C 83, 065807 (2011) G.G.Kiss, P.Mohr, Zs.Fulop, Gy.Gyurky, Z.Elekes, J.Farkas, E.Somorjai, C.Yalcin, D.Galaviz, R.T.Guray, N.Ozkan, J.Gorres 110, 116Cd(α, α)110, 116Cd elastic scattering and systematic investigation of elastic α scattering cross sections along the Z=48 isotopic and N=62 isotonic chains NUCLEAR REACTIONS 110,116Cd(α, α'), E=16.4, 19.46 MeV; measured Eα, yields and σ(θ). 106Cd, 112Sn(α, α'), E(cm)=15.6, 18.9 MeV; analyzed σ(θ) data. 110,116Cd(α, α), E=8-20 MeV; analyzed σ(E) data. Optical model analysis and predictions. Global parameterization of the α-nucleus potential used in astrophysical p-process calculations.
doi: 10.1103/PhysRevC.83.065807
2011MA46 Phys.Rev. C 84, 025801 (2011) A.Matic, A.M.van den Berg, M.N.Harakeh, H.J.Wortche, M.Beard, G.P.A.Berg, J.Gorres, P.LeBlanc, S.O'Brien, M.Wiescher, K.Fujita, K.Hatanaka, Y.Sakemi, Y.Shimizu, Y.Tameshige, A.Tamii, M.Yosoi, T.Adachi, Y.Fujita, Y.Shimbara, H.Fujita, T.Wakasa, J.P.Greene, R.Crowter, H.Schatz High-precision 28Si( p, t)26Si reaction to determine 22Mg(α, p)25Al reaction rates NUCLEAR REACTIONS 28Si(p, t)26Si, E=98.7 MeV; measured E(t), I(t), angular distributions using Grand Raiden spectrometer at RCNP facility. 26Si; deduced levels above the α-emission threshold, J, π, α-resonances, spectroscopic factors. 22Mg(α, p)25Al; deduced stellar reaction rates using the narrow resonance formalism. Comparison with theoretical calculations.
doi: 10.1103/PhysRevC.84.025801
2011NE16 Nucl.Instrum.Methods Phys.Res. A 654, 29 (2011) R.Neveling, H.Fujita, F.D.Smit, T.Adachi, G.P.A.Berg, E.Z.Buthelezi, J.Carter, J.L.Conradie, M.Couder, R.W.Fearick, S.V.Fortsch, D.T.Fourie, Y.Fujita, J.Gorres, K.Hatanaka, M.Jingo, A.M.Krumbholz, C.O.Kureba, J.P.Mira, S.H.T.Murray, P.Von Neumann-Cosel, S.O'Brien, P.Papka, I.Poltoratska, A.Richter, E.Sideras-Haddad, J.A.Swartz, A.Tamii, I.T.Usman, J.J.Van Zyl High energy-resolution zero-degree facility for light-ion scattering and reactions at iThemba LABS NUCLEAR REACTIONS 40Ca(p, p'), E=200 MeV; measured products, 40Ca; deduced σ(θ). Data were imported from EXFOR entry D0706.
doi: 10.1016/j.nima.2011.06.077
2011SO35 J.Phys.:Conf.Ser. 312, 042007 (2011) K.Sonnabend, J.Glorius, J.Gorres, M.Knorzer, S.Muller, A.Sauerwein, W.P.Tan, M.Wiescher Activation Experiments for p-Process Nucleosynthesis NUCLEAR REACTIONS 166Er(α, n), E=11.75-15 MeV;169Tm(p, n), E(cm)=3.3-6.8 MeV; measured Eγ, Iγ using HPGe; deduced σ using activation method; calculated σ using TALYS and NON-SMOKER. A=155-176(γ, n), E≈Gamow window; measured Eγ, Iγ from bremsstrahlung experiment; deduced reaction rates; calculated reaction rates using TALYS. Compared with other published data on (γ, n).
doi: 10.1088/1742-6596/312/4/042007
2010AZ01 Phys.Rev. C 81, 045805 (2010) R.E.Azuma, E.Uberseder, E.C.Simpson, C.R.Brune, H.Costantini, R.J.de Boer, J.Gorres, M.Heil, P.J.LeBlanc, C.Ugalde, M.Wiescher AZURE: An R-matrix code for nuclear astrophysics NUCLEAR REACTIONS 12C(p, γ), (p, p), 14N(p, γ), E=0.2-2.5 MeV; 16O(p, γ), E=0.23-3.75 MeV; analyzed σ(θ), proton widths, γ widths, S factor and nuclear phase shift using R-matrix analysis. Description of AZURE code for R-matrix analysis of reactions relevant to nuclear astrophysics.
doi: 10.1103/PhysRevC.81.045805
2010CO12 Phys.Rev. C 82, 035802 (2010) H.Costantini, R.J.de Boer, R.E.Azuma, M.Couder, J.Gorres, J.W.Hammer, P.J.LeBlanc, H.Y.Lee, S.O'Brien, A.Palumbo, E.C.Simpson, E.Stech, W.Tan, E.Uberseder, M.Wiescher 16O(α, γ)20Ne S factor: Measurements and R-matrix analysis NUCLEAR REACTIONS 16O(α, γ), E=2.5 MeV; measured Eγ, Iγ, γγ-coin, Eα, Iα. 20Ne; deduced levels, J, π, resonances, width, yields, branching ratios, S factors, reaction rates. R-matrix analysis.
doi: 10.1103/PhysRevC.82.035802
2010DE29 Phys.Rev. C 82, 025802 (2010) R.J.de Boer, M.Wiescher, J.Gorres, R.Longland, C.Iliadis, G.Rusev, A.P.Tonchev Photoexcitation of astrophysically important states in 26Mg. II. Ground-state-transition partial widths NUCLEAR REACTIONS 26Mg(γ, γ'), E=10.5-11.7 MeV; measured Eγ, Iγ; deduced levels, J, π, resonances, branching ratios, total widths, partial widths. GEANT4 Monte-Carlo simulation of γ-ray spectra. Relevance to predictions of neutron production for the s-process in nucleosynthesis.
doi: 10.1103/PhysRevC.82.025802
2010LE21 Phys.Rev. C 82, 055804 (2010), Erratum Phys.Rev. C 84, 019902 (2011) P.J.LeBlanc, G.Imbriani, J.Gorres, M.Junker, R.Azuma, M.Beard, D.Bemmerer, A.Best, C.Broggini, A.Caciolli, P.Corvisiero, H.Costantini, M.Couder, R.deBoer, Z.Elekes, S.Falahat, A.Formicola, Zs.Fulop, G.Gervino, A.Guglielmetti, C.Gustavino, Gy.Gyurky, F.Kappeler, A.Kontos, R.Kuntz, H.Leiste, A.Lemut Q.Li, B.Limata, M.Marta, C.Mazzocchi, R.Menegazzo, S.O'Brien, A.Palumbo, P.Prati, V.Roca, C.Rolfs, C.Rossi Alvarez, E.Somorjai, E.Stech, O.Straniero, F.Strieder, W.Tan, F.Terrasi, H.P.Trautvetter, E.Uberseder, M.Wiescher Constraining the S factor of 15N(p, γ)16O at astrophysical energies NUCLEAR REACTIONS 15N(p, γ), E=130-1800 keV; measured Ep, Ip, Eγ, Iγ, σ(E), σ(θ); deduced resonances, branching ratios, astrophysical S factors and reaction rates. Multilevel R-matrix analysis. Implications for the first and second cycles of the CNO cycles.
doi: 10.1103/PhysRevC.82.055804
2010MA43 Phys.Rev. C 82, 025807 (2010) A.Matic, A.M.van den Berg, M.N.Harakeh, H.J.Wortche, G.P.A.Berg, M.Couder, J.Gorres, P.LeBlanc, S.O'Brien, M.Wiescher, K.Fujita, K.Hatanaka, Y.Sakemi, Y.Shimizu, Y.Tameshige, A.Tamii, M.Yosoi, T.Adachi, Y.Fujita, Y.Shimbara, H.Fujita, T.Wakasa, B.A.Brown, H.Schatz High-precision (p, t) reaction to determine 25Al(p, γ)26Si reaction rates NUCLEAR REACTIONS 28Si(p, t), E=98.7 MeV; measured triton spectra, σ, σ(θ). 26Si; deduced levels, J, π, proton resonance energies, spectroscopic factors. DWBA analysis. Comparisons with previous measurements. 26Si, 26Mg; analyzed mirror states. 25Al(p, γ)26Si; deduced reaction rates from 0.01 t0 10 GK, comparisons with previous data and statistical-model calculations.
doi: 10.1103/PhysRevC.82.025807
2010TA17 Nucl.Phys. A834, 679c (2010) W.P.Tan, S.Almaraz, A.Aprahamian, B.Bucher, J.Gorres, H.Mach, M.Wiescher, C.Brune, Z.Heinen, T.Massey α-Induced Reaction Rates for Accreting Compact Stars NUCLEAR REACTIONS 16O, 28Si(3He, n), E=15 MeV; measured ToF neutron σ(E). 18Ne, 30S; deduced energies of levels.
doi: 10.1016/j.nuclphysa.2010.01.123
2009GU27 Phys.Rev. C 80, 035804 (2009) R.T.Guray, N.Ozkan, C.Yalcin, A.Palumbo, R.deBoer, J.Gorres, P.J.Leblanc, S.O'Brien, E.Strandberg, W.P.Tan, M.Wiescher, Zs.Fulop, E.Somorjai, H.Y.Lee, J.P.Greene Measurements of proton-induced reaction cross sections on 120Te for the astrophysical p process NUCLEAR REACTIONS 120Te(p, γ), (p, n), E(cm)=2.47-7.93 MeV; measured Eγ, Iγ, half-life, σ by activation method; deduced astrophysical S factors. Comparison with statistical model calculations using NON-SMOKER and TALYS computer codes. RADIOACTIVITY 120I(EC); measured Eγ. 120I; deduced ground-state half-life.
doi: 10.1103/PhysRevC.80.035804
2009LE23 Phys.Rev. C 80, 025805 (2009) H.Y.Lee, M.Couder, A.Couture, S.Falahat, J.Gorres, L.Lamm, P.J.LeBlanc, S.O'Brien, A.Palumbo, E.Stech, E.Strandberg, W.Tan, C.Ugalde, M.Wiescher Cross-section measurement of the 18F(α, p)21Ne reaction and possible implication for neutron production in explosive helium burning NUCLEAR REACTIONS 21Ne(p, α)18F, E=2.3-4.0 MeV; measured Eγ, Iγ, decay curves, half-lives; deduced reaction yields and σ by R-matrix analysis. 18F(α, p)21Ne, E=0.5-2.1 MeV; deduced σ and reaction rates. Comparison with Hauser-Feshbach calculations. Discussed implications for astrophysical r-process and evolution of elemental abundances in supernovae.
doi: 10.1103/PhysRevC.80.025805
2009LO06 Phys.Rev. C 80, 055803 (2009) R.Longland, C.Iliadis, G.Rusev, A.P.Tonchev, R.J.de Boer, J.Gorres, M.Wiescher Photoexcitation of astrophysically important states in 26Mg NUCLEAR REACTIONS 26Mg(polarized γ, γ'), E=10.8, 11.0, 11.2, 11.4 MeV; measured Eγ, Iγ, and γγ(θ) at TUNL HIγS facility. 26Mg; deduced levels, J, π, and branching ratios. Comparison with Monte Carlo simulations. Implications for the reaction rates for 22Ne(α, γ)26Mg of astrophysical interest.
doi: 10.1103/PhysRevC.80.055803
2009MA68 Phys.Rev. C 80, 055804 (2009) A.Matic, A.M.van den Berg, M.N.Harakeh, H.J.Wortche, G.P.A.Berg, M.Couder, J.L.Fisker, J.Gorres, P.LeBlanc, S.O'Brien, M.Wiescher, K.Fujita, K.Hatanaka, Y.Sakemi, Y.Shimizu, Y.Tameshige, A.Tamii, M.Yosoi, T.Adachi, Y.Fujita, Y.Shimbara, H.Fujita, T.Wakasa, P.O.Hess, B.A.Brown, H.Schatz High-precision (p, t) reaction measurement to determine 18Ne(α, p)21Na reaction rates NUCLEAR REACTIONS 24Mg(p, t), E=98.7 MeV; measured E(t), I(t), σ(θ) using Grand-Raiden spectrometer at RCNP facility. 22Mg; deduced levels, J, π, Sα, proton resonances. DWBA and R-matrix analyses. Comparison of level systematics with mirror nucleus 22Ne. 18Ne(α, p)21Na; deduced stellar reaction rates.
doi: 10.1103/PhysRevC.80.055804
2009TA09 Phys.Rev. C 79, 055805 (2009) W.P.Tan, J.Gorres, M.Beard, M.Couder, A.Couture, S.Falahat, J.L.Fisker, L.Lamm, P.J.LeBlanc, H.Y.Lee, S.O'Brien, A.Palumbo, E.Stech, E.Strandberg, M.Wiescher Measurement of the decay branching ratios of the α-unbound states in 19Ne and the 15O(α, γ) reaction rate NUCLEAR REACTIONS 19F(3He, t), E=24 MeV; measured triton spectra, tα-coin, α(θ), α-decay branching ratios. 19Ne; deduced levels, J, π, α-unbound resonances. 15O(α, γ); deduced reaction rates versus temperature.
doi: 10.1103/PhysRevC.79.055805
2009TI02 Phys.Rev. C 79, 055803 (2009) P.Tischhauser, A.Couture, R.Detwiler, J.Gorres, C.Ugalde, E.Stech, M.Wiescher, M.Heil, F.Kappeler, R.E.Azuma, L.Buchmann Measurement of elastic 12C+α scattering: Details of the experiment, analysis, and discussion of phase shifts NUCLEAR REACTIONS 12C(α, α), E=2.6-8.2 MeV; measured Eα, Iα, σ(θ); deduced phase shifts using R-matrix analysis. 16O; deduced levels, resonances, α-widths. Application to 12C(α, γ)16O reaction of astrophysical interest.
doi: 10.1103/PhysRevC.79.055803
2009UB01 Phys.Rev.Lett. 102, 151101 (2009) E.Uberseder, R.Reifarth, D.Schumann, I.Dillmann, C.Domingo Pardo, J.Gorres, M.Heil, F.Kappeler, J.Marganiec, J.Neuhausen, M.Pignatari, F.Voss, S.Walter, M.Wiescher Measurement of the 60Fe(n, γ)61Fe Cross Section at Stellar Temperatures NUCLEAR REACTIONS 60Fe(n, γ), E=25-100 keV; measured reaction products, Eγ, Iγ; deduced Maxwellian-averaged σ and its uncertainties. Comparison with stellar models and NACRE data.
doi: 10.1103/PhysRevLett.102.151101
2008CO03 Phys.Rev. C 77, 015802 (2008) A.Couture, M.Beard, M.Couder, J.Gorres, L.Lamm, P.J.LeBlanc, H.Y.Lee, S.O'Brien, A.Palumbo, E.Stech, E.Strandberg, W.Tan, E.Uberseder, C.Ugalde, M.Wiescher, R.Azuma Measurement of the 19F(p, γ)20Ne reaction and interference terms from Ec.m.=200-760 keV NUCLEAR REACTIONS 19F(p, γ), E(cm)=200-700 keV; measured Eγ, Iγ, resonance parameters, interference signs. 20Ne, 16O, 19F; deduced levels, J, π.
doi: 10.1103/PhysRevC.77.015802
2008RE01 Phys.Rev. C 77, 015804 (2008) R.Reifarth, M.Heil, C.Forssen, U.Besserer, A.Couture, S.Dababneh, L.Dorr, J.Gorres, R.C.Haight, F.Kappeler, A.Mengoni, S.O'Brien, N.Patronis, R.Plag, R.S.Rundberg, M.Wiescher, J.B.Wilhelmy The 14C(n, γ) cross section between 10 keV and 1 MeV NUCLEAR REACTIONS 14C(n, γ), E=10-1000 keV; measured neutron spectra, neutron flux, Eγ, Iγ, cross sections; deduced reaction rate. 15C; measured half-life.
doi: 10.1103/PhysRevC.77.015804
2008ST11 Phys.Rev. C 77, 055801 (2008) E.Strandberg, M.Beard, M.Couder, A.Couture, S.Falahat, J.Gorres, P.J.LeBlanc, H.Y.Lee, S.O'Brien, A.Palumbo, E.Stech, W.P.Tan, C.Ugalde, M.Wiescher, H.Costantini, K.Scheller, M.Pignatari, R.Azuma, L.Buchmann 24Mg(α, γ)28Si resonance parameters at low alpha-particle energies NUCLEAR REACTIONS 24Mg(α, γ), E=1.0-1.5 MeV; measured Eγ, Iγ, γγ-coin, branching ratios, resonance strengths. 28Si; deduced levels, J, π, reaction rates. 13C, 17O, 21,22Ne, 25Mg(α, n); 16O, 20Ne(α, γ); 23Na, 24Mg, 27Al(p, γ); 23Na, 24Mg, 27Al, 28Si(n, γ); 25Al(γ, p); 27Al(p, α); analyzed reaction rates.
doi: 10.1103/PhysRevC.77.055801
2008UG01 Phys.Rev. C 77, 035801 (2008) C.Ugalde, R.E.Azuma, A.Couture, J.Gorres, H.Y.Lee, E.Stech, E.Strandberg, W.Tan, M.Wiescher Thermonuclear rate for the 19F(α, p)22Ne reaction at stellar temperatures NUCLEAR REACTIONS 19F(α, p), E=792-1993 keV; measured yield curves, σ, σ(θ), reaction rate at stellar temperatures; calculated low energy S-factor. R-matrix analysis.
doi: 10.1103/PhysRevC.77.035801
2007LU10 Astrophys.J. 665, 637 (2007) J.Lund Fisker, W.Tan, J.Gorres, M.Wiescher, R.L.Cooper The 15O(α, γ)19Ne Reaction Rate and the Stability of Thermonuclear Burning on Accreting Neutron Stars NUCLEAR REACTIONS 15O(α, γ), E=low; calculated reaction rate.
2007OZ01 Phys.Rev. C 75, 025801 (2007) N.Ozkan, G.Efe, R.T.Guray, A.Palumbo, J.Gorres, H.Y.Lee, L.O.Lamm, W.Rapp, E.Stech, M.Wiescher, Gy.Gyurky, Zs.Fulop, E.Somorjai Astrophysical S factor for α-capture on 112Sn in the p-process energy range NUCLEAR REACTIONS 112Sn(α, γ), (α, p), E(cm)=7.59-11.42 MeV; measured σ; deduced astrophysical S-factors. Activation technique.
doi: 10.1103/PhysRevC.75.025801
2007TA13 Phys.Rev.Lett. 98, 242503 (2007) W.P.Tan, J.L.Fisker, J.Gorres, M.Couder, M.Wiescher 15O(α, γ)19Ne Breakout Reaction and Impact on X-Ray Bursts RADIOACTIVITY 19Ne(α) [from 19F(3He, t)]; measured Eα, Iα. 15O(α, γ); deduced reaction rate at astrophysical energies.
doi: 10.1103/PhysRevLett.98.242503
2007UB01 Phys.Rev. C 75, 035801 (2007) E.Uberseder, M.Heil, Fr.Kappeler, J.Gorres, M.Wiescher New measurements of the 19F(n, γ)20F cross section and their implications for the stellar reaction rate NUCLEAR REACTIONS 19F(n, γ), E=spectrum; measured Eγ, Iγ, Maxwellian averaged σ. Astrophysical implications discussed.
doi: 10.1103/PhysRevC.75.035801
2007WI06 Prog.Part.Nucl.Phys. 59, 51 (2007) M.Wiescher, G.P.A.Berg, M.Couder, J.L.Fisker, Y.Fujita, J.Gorres, M.N.Harakeh, K.Hatanaka, A.Matic, W.Tan, A.M.van den Berg Astrophysical nuclear reactions and the break-out from the hot CNO cycles
doi: 10.1016/j.ppnp.2007.01.021
2006BA40 Phys.Rev. C 74, 015802 (2006) A.Bartlett, J.Gorres, G.J.Mathews, K.Otsuki, M.Wiescher, D.Frekers, A.Mengoni, J.Tostevin Two-neutron capture reactions and the r process NUCLEAR REACTIONS 4He(2n, γ), 6He(α, n), E(cm)=0-4 MeV; calculated σ, astrophysical reaction rates. Implications for r-process nucleosynthesis discussed.
doi: 10.1103/PhysRevC.74.015802
2006FI07 Astrophys.J. 650, 332 (2006) J.O.Fisker, J.Gorres, M.Wiescher, B.Davids The importance of 15O(α, γ)19Ne to x-ray bursts and superbursts NUCLEAR REACTIONS 15O(α, γ), E=low; calculated astrophysical reaction rate. Implications for X-ray bursts discussed.
doi: 10.1086/507083
2006GY01 Phys.Rev. C 74, 025805 (2006) Gy.Gyurky, G.G.Kiss, Z.Elekes, Zs.Fulop, E.Somorjai, A.Palumbo, J.Gorres, H.Y.Lee, W.Rapp, M.Wiescher, N.Ozkan, R.T.Guray, G.Efe, T.Rauscher α-induced cross sections of 106Cd for the astrophysical p process NUCLEAR REACTIONS 106Cd(α, γ), (α, n), (α, p), E ≈ 7.5-12.5 MeV; measured σ; deduced S-factors. Comparison with statistical model predictions. Astrophysical implications discussed.
doi: 10.1103/PhysRevC.74.025805
2006KA25 Astrophys.J. 643, 471 (2006) A.I.Karakas, M.A.Lugaro, M M.Wiescher, J.Gorres, C.Ugalde The uncertainties in the 22Ne-α-capture reaction rates and the production of the heavy magnesium isotopes in asymptotic giant branch stars of intermediate mass NUCLEAR REACTIONS 22Ne(α, n), (α, γ), E=low; calculated astrophysical reaction rates, resonance parameters, related features. Implications for stellar nucleosynthesis discussed.
doi: 10.1086/502793
2006OZ05 Eur.Phys.J. A 27, Supplement 1, 145 (2006) N.Ozkan, G.Efe, R.T.Guray, A.Palumbo, M.Wiescher, J.Gorres, H.-Y.Lee, Gy.Gyurky, E.Somorjai, Zs.Fulop A study of alpha capture cross-sections of 112Sn NUCLEAR REACTIONS 112Sn(α, γ), E=8-12 MeV; measured σ. Activation technique.
doi: 10.1140/epja/i2006-08-021-x
2006RA27 Astrophys.J. 653, 474 (2006) W.Rapp, J.Gorres, M.Wiescher, H.Schatz, F.Kappeler Sensitivity of p-process nucleosynthesis to nuclear reaction rates in a 25 M(.) supernova model
doi: 10.1086/508402
2005GY03 Nucl.Phys. A758, 517c (2005) Gy.Gyurky, Zs.Fulop, G.Kiss, Z.Mate, E.Somorjai, J.Gorres, A.Palumbo, M.Wiescher, D.Galaviz, A.Kretschmer, K.Sonnabend, A.Zilges, T.Rauscher A comprehensive study of the 106Cd(α, γ)110Sn reaction at energies relevant to the p-process NUCLEAR REACTIONS 106Cd(α, γ), E=8-12.5 MeV; measured Eγ, Iγ, σ. 106Cd(α, α), E ≈ 15, 17, 19 MeV; measured σ(θ). Astrophysical implications discussed, comparison with model predictions.
doi: 10.1016/j.nuclphysa.2005.05.094
2005RE22 Nucl.Phys. A758, 787c (2005) R.Reifarth, M.Heil, R.Plag, U.Besserer, S.Dababneh, L.Dorr, J.Gorres, R.C.Haight, F.Kappeler, A.Mengoni, S.O'Brien, N.Patronis, R.S.Rundberg, M.Wiescher, J.B.Wilhelmy Stellar neutron capture rates of 14C NUCLEAR REACTIONS 14C(n, γ), E=30, 150, 500 keV; measured σ. Fast cyclic activation technique.
doi: 10.1016/j.nuclphysa.2005.05.141
2005TA28 Phys.Rev. C 72, 041302 (2005) W.P.Tan, J.Gorres, J.Daly, M.Couder, A.Couture, H.Y.Lee, E.Stech, E.Strandberg, C.Ugalde, M.Wiescher Lifetime of the astrophysically important 4.03-MeV state in 19Ne NUCLEAR REACTIONS 17O(3He, n), E=3.0 MeV; measured Eγ, Iγ, nγ-coin, DSA. 19Ne levels deduced energies, T1/2. Astrophysical implications discussed. Comparison with model predictions.
doi: 10.1103/PhysRevC.72.041302
2005UG04 Nucl.Phys. A758, 577c (2005) C.Ugalde, R.Azuma, A.Couture, J.Gorres, M.Heil, K.Scheller, E.Stech, W.Tan, M.Wiescher The reaction rate for the destruction of fluorine in AGB stars NUCLEAR REACTIONS 19F(α, p), E=1238-2009 keV; measured yields; deduced astrophysical reaction rates.
doi: 10.1016/j.nuclphysa.2005.05.106
2004SE02 Phys.Lett. B 590, 170 (2004) D.Seweryniak, P.J.Woods, B.Blank, M.P.Carpenter, T.Davinson, S.J.Freeman, J.Gorres, A.Heinz, R.V.F.Janssens, H.Mahmud, T.L.Khoo, Z.Liu, G.Mukherjee, E.Rehm, F.Sarazin, J.Shergur, M.Shawcross, S.Sinha, A.Woehr Complete structure determination of the astrophysically important nucleus 20Na below the proton threshold NUCLEAR REACTIONS 10B(12C, 2n), (12C, 2p), E=60 MeV; measured Eγ, Iγ, (recoil)γ-coin. 20Na, 20F deduced levels, J, π. Gammasphere array, mass separator.
doi: 10.1016/j.physletb.2004.03.090
2004WO16 Nucl.Phys. A742, 349 (2004) A.Wohr, A.Aprahamian, P.Boutachkov, J.L.Galache, J.Gorres, M.Shawcross, A.Teymurazyan, M.C.Wiescher, D.S.Brenner, C.N.Davids, S.M.Fischer, A.M.Heinz, R.V.F.Janssens, D.Seweryniak The N = Z rp-process waiting-point nucleus 68Se and its astrophysical implications RADIOACTIVITY 68Se(EC), (β+) [from 12C(58Ni, 2n)]; measured Eγ, Eβ, βγ-coin; deduced Q(EC). 68Se deduced mass excess. 68As deduced transitions. Fragment mass analyzer. NUCLEAR REACTIONS 68Se, 69Br(p, γ), E not given; analyzed mass data; deduced reaction Q-values. Astrophysical implications discussed.
doi: 10.1016/j.nuclphysa.2004.06.024
2003BE50 Nucl.Phys. A718, 608c (2003) G.P.A.Berg, K.Hatanaka, M.Wiescher, H.Schatz, T.Adachi, A.D.Bacher, C.C.Foster, Y.Fujita, H.Fujita, K.Fujita, J.Gorres, Ch.Herman, J.Kamiya, N.Sakamoto, Y.Sakemi, Y.Shimbara, Y.Shimizu, E.J.Stephenson, T.Wakasa, M.Yosoi Resonance States in 22Mg for Reaction Rates in the rp-Process NUCLEAR REACTIONS 24Mg(α, 6He), E=206 MeV; measured excitation energy spectrum. 22Mg deduced levels. Astrophysical implications discussed.
doi: 10.1016/S0375-9474(03)00900-X
2003DA19 Phys.Rev. C 68, 025801 (2003) S.Dababneh, M.Heil, F.Kappeler, J.Gorres, M.Wiescher, R.Reifarth, H.Leiste Stellar He burning of 18O: A measurement of low-energy resonances and their astrophysical implications NUCLEAR REACTIONS 18O(α, γ), E ≈ 470-770 keV; measured Eγ, Iγ; deduced resonance strengths, branching ratios, reaction rates. HPGe and BGO detectors. Astrophysical implications discussed.
doi: 10.1103/PhysRevC.68.025801
2003DO01 Phys.Rev. C 67, 014315 (2003) J.Doring, R.A.Kaye, A.Aprahamian, M.W.Cooper, J.Daly, C.N.Davids, R.C.de Haan, J.Gorres, S.R.Lesher, J.J.Ressler, D.Seweryniak, E.J.Stech, A.Susalla, S.L.Tabor, J.Uusitalo, W.B.Walters, M.Wiescher Rotational and vibrational excitations in 84Zr studied through in-beam and 84Nb β-decay spectroscopy NUCLEAR REACTIONS 59Co(28Si, 2np), E=99 MeV; 58Ni(32S, 2pα), E=135 MeV; measured Eγ, Iγ, γγ-coin, angular distributions. 84Zr deduced levels, J, π, rotational and vibrational excitations, deformation. Comparison with level systematics in neighboring nuclides. RADIOACTIVITY 84Nb(EC) [from 58Ni(28Si, np)]; measured Eγ, Iγ, γγ-, βγ-coin, T1/2; deduced log ft. 84Zr deduced levels, J, π. Mass-separated source.
doi: 10.1103/PhysRevC.67.014315
2003GO21 Nucl.Phys. A718, 155c (2003) J.Gorres, S.Dababneh, A.Couture, M.Heil, F.Kappeler, H.Leiste, M.Lugaro, C.Ugalde, M.Wiescher Nucleosynthesis in TP-AGB Stars and the Production of 19F NUCLEAR REACTIONS 18O(α, γ), E ≈ 470, 566 MeV; measured Eγ, Iγ, γγ-coin; deduced resonance strengths, reaction rate. Implications for 19F nucleosynthesis discussed.
doi: 10.1016/S0375-9474(03)00707-3
2002FU17 Phys.Rev. C66, 044313 (2002) Y.Fujita, Y.Shimbara, I.Hamamoto, T.Adachi, G.P.A.Berg, H.Fujimura, H.Fujita, J.Gorres, K.Hara, K.Hatanaka, J.Kamiya, T.Kawabata, Y.Kitamura, Y.Shimizu, M.Uchida, H.P.Yoshida, M.Yoshifuku, M.Yosoi M1 and Gamow-Teller transitions in T = 1/2 nuclei 23Na and 23Mg NUCLEAR REACTIONS 23Na(3He, t), E=140 MeV/nucleon; measured triton spectra, σ(θ=0°). 23Na, 23Mg deduced Gamow-Teller transition strengths, B(M1), orbital contributions. Particle-rotor model. Astrophysical implications discussed. NUCLEAR STRUCTURE 23Na, 23Mg; analyzed M1 and Gamow-Teller transition strengths; deduced orbital contributions, related features.
doi: 10.1103/PhysRevC.66.044313
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