NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = E.Stech Found 52 matches. 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
2024KE01 Phys.Rev. C 109, 035805 (2024) R.Kelmar, J.P.McDonaugh, A.Simon, J.O'Reilly, A.C.Dombos, A.Gula, J.Koros, M.Matney, O.Olivas-Gomez, D.Robertson, E.Stech Filtering contaminants from a γ-sum spectrum: Measurement of the 94Mo(p, γ)95Tc cross section
doi: 10.1103/PhysRevC.109.035805
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
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
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
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
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
2020KE01 Phys.Rev. C 101, 015801 (2020), Erratum Phys.Rev. C 96, 019901 (2017) R.Kelmar, A.Simon, O.Olivas-Gomez, P.Millican, C.S.Reingold, E.Churchman, A.M.Clark, S.L.Henderson, S.E.Kelly, D.Robertson, E.Stech, W.P.Tan Searching for (γ, α)/(γ, n) branching points in the γ-process path near A+100 NUCLEAR REACTIONS 90Zr, 102Pd, 108,110Cd(α, γ), E(cm)=7.5-11.6 MeV; measured Eγ, Iγ, σ(E) using High Efficiency total absorption spectrometer (HECTOR) composed of 16 NaI(Tl) detectors at the University of Notre Dame Nuclear Science Laboratory. Comparison with data in NONSMOKER database, and with calculations using TALYS 1.9 code. 90Zr, 102Pd, 108,110Cd(α, γ), T9=0.3-10; deduced astrophysical reaction rates using the TALYS 1.9 code with the back-shifted Fermi gas LD model, the αOMP, and the Brink-Axel Lorentzian γSF.
doi: 10.1103/PhysRevC.101.015801
2020OL07 Phys.Rev. C 102, 055806 (2020) O.Olivas-Gomez, A.Simon, O.Gorton, J.E.Escher, E.Churchman, P.Millican, R.Kelmar, C.S.Reingold, A.M.Clark, N.Cooper, C.Harris, S.L.Henderson, S.E.Kelly, F.Naqvi, A.Palmisano, D.Robertson, E.Stech, A.Spyrou, W.P.Tan Measurements of proton capture in the A = 100-100 mass region: Constraints on the 111In(γ, p)/(γ, n) branching point relevant to the γ process NUCLEAR REACTIONS 102Pd(p, γ)103Ag, E=4-8 MeV; 108Cd(p, γ)109In, E=3.5=7 MeV; 110Cd(p, γ)111In, E=3-6 MeV; measured Eγ, Iγ, summed γ spectra using a high efficiency total absorption spectrometer and γ-summing technique at the 10-MV FN Tandem Van de Graaff accelerator of the University of Notre Dame; deduced capture σ(E) for the ground states, total σ(E), constrain Hauser-Feshbach parameters used in TALYS 1.9. Comparison with theoretical predictions from the NON-SMOKER code, and with Hauser-Feshbach statistical calculations. Recommended (γ, p) and (γ, n) stellar photodissociation decay rates for 103Ag, 109In and 111In for T=1-10 GK. Relevance to γ process is an explosive astrophysical scenario.
doi: 10.1103/PhysRevC.102.055806
2019LA15 Phys.Rev. C 100, 034614 (2019) E.Lamere, M.Couder, M.Beard, A.Simon, A.Simonetti, M.Skulski, G.Seymour, P.Huestis, K.Manukyan, Z.Meisel, L.Morales, M.Moran, S.Moylan, C.Seymour, E.Stech Proton-induced reactions on molybdenum NUCLEAR REACTIONS 92Mo(p, α)89Nb/89mNb, (p, np)91Mo/91mMo, (p, 2p)91mNb, (p, n)92Tc, (p, γ)93Tc/93mTc, E=10.52, 13.03, 15.07, 16.07, 17.05, 18.07 MeV; 94Mo(p, α)91mNb, (p, np)93mMo, (p, 2n)93Tc/93mTc, (p, n)94Tc/94mTc, E=9.04, 10.06, 11.05, 12.05, 13.04, 14.04, 15.04, 16.06, 17.06, 18.05, 19.06 MeV; 95Mo(p, nα)91mNb, (p, α)92mNb, (p, 2n)94Tc/94mTc, (p, n)95mTc/95mTc, E=10.57, 12.01, 13.02, 4.03, 15.07, 16.03, 17.99, 19.03 MeV; 96Mo(p, nα)92mNb, (p, 2n)95Tc/95mTc, (p, n)96Tc/96mTc, E=8.04, 10.06, 11.07, 11.55, 12.07, 12.55, 13.06, 14.05, 15.05, 16.05, 17.05, 18.05, 19.06 MeV; 97Mo(p, 2n)96Tc/96mTc, (p, n)97mTc, E=9.01, 10.05, 10.98, 11.98, 13.02, 14.02, 15.04 MeV; 98Mo(p, α)95Nb/95mNb, (p, 2n)97mTc, (p, γ)99mTc, E=10.06, 11.06, 12.05, 13.06, 14.05, 15.05, 16.06, 17.06, 18.02, 19.05 MeV; 100Mo(p, nα)96Nb, (p, α)97Nb/97mNb, (p, np)99Mo, (p, 2n)99mTc, (p, γ)101Tc, E=8.01, 9.01, 10.07, 11.01, 12.02, 13.03, 14.03, 15.07, 16.04, 17.03, 18.07, 19.07 MeV; measured Eγ, Iγ, σ(E) by γ-activation method. Comparison with HF calculations using TALYS-1.8 code, and with previous experimental results. Measurement made at the Nuclear Science Laboratory at the University of Notre Dame.
doi: 10.1103/PhysRevC.100.034614
2019RE04 Eur.Phys.J. A 55, 77 (2019) C.S.Reingold, O.Olivas-Gomez, A.Simon, J.Arroyo, M.Chamberlain, J.Wurzer, A.Spyrou, F.Naqvi, A.C.Dombos, A.Palmisano, T.Anderson, A.M.Clark, B.Frentz, M.R.Hall, S.L.Henderson, S.Moylan, D.Robertson, M.Skulski, E.Stech, S.Y.Strauss, W.P.Tan, B.Vande Kolk High Efficiency Total Absorption Spectrometer HECTOR for capture reaction measurements RADIOACTIVITY 60Co(IT); measured Eγ, Iγ using Total Absorption Spectrometer HECTOR; deduced sum spectrum; compared with GEANT4 simulated spectrum. NUCLEAR REACTIONS 27Al(p, γ), E not given; measured Eγ, Iγ; deduced resonances, average multiplicities, summing efficiencies and resonance strengths; compared with GEANT4 simulations and with published data. Remark: Paper aimed mainly to show the possibilities of the HECTOR spectrometer.
doi: 10.1140/epja/i2019-12748-8
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
2007RO12 Nucl.Instrum.Methods Phys.Res. B259, 669 (2007) D.Robertson, C.Schmitt, Ph.Collon, D.Henderson, B.Shumard, L.Lamm, E.Stech, T.Butterfield, P.Engel, G.Hsu, G.Konecki, S.Kurtz, R.Meharchand, A.Signoracci, J.Wittenbach A new AMS setup for nuclear astrophysics experiments
doi: 10.1016/j.nimb.2007.01.261
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
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
2002TI03 Phys.Rev.Lett. 88, 072501 (2002) P.Tischhauser, R.E.Azuma, L.Buchmann, R.Detwiler, U.Giesen, J.Gorres, M.Heil, J.Hinnefeld, F.Kappeler, J.J.Kolata, H.Schatz, A.Shotter, E.Stech, S.Vouzoukas, M.Wiescher Elastic α - 12C Scattering and the 12C(α, γ)16O E2 S Factor NUCLEAR REACTIONS 12C(α, α), E=2.6-8.2 MeV; measured σ(θ); deduced interaction radius. 16O levels deduced reduced width amplitudes. 12C(α, γ), E(cm)=300 keV; calculated E2 S-factor. R-matrix analysis, comparison with previous results.
doi: 10.1103/PhysRevLett.88.072501
2001BU20 Nucl.Phys. A688, 259c (2001) L.Buchmann, P.Tischhauser, R.E.Azuma, R.Detwiler, U.Giesen, J.Gorres, M.Heil, J.Hinnefeld, F.Kappeler, J.J.Kolata, H.Schatz, A.Shotter, E.Stech, S.Vouzoukas, M.Wiescher Restrictions on the Stellar 12C(α, γ)16O Rate from Elastic α-12C Scattering NUCLEAR REACTIONS 12C(α, α), E=2.6-8.2 MeV; measured σ(θ), S-factors following R-matrix calculations. Comparison with previous measurements.
doi: 10.1016/S0375-9474(01)00710-2
2001GO28 Nucl.Phys. A688, 225c (2001) J.Gorres, C.Arlandini, U.Giesen, M.Heil, F.Kappeler, H.Leiste, E.Stech, M.Wiescher Topics in Stellar He Burning NUCLEAR REACTIONS 14N(α, γ), E=low; measured σ, resonance energy and strength, reaction rates. Comparison with earlier data, network calculations.
doi: 10.1016/S0375-9474(01)00703-5
2001HE22 Nucl.Phys. A688, 499c (2001) M.Heil, A.Couture, J.Daly, R.Detwiler, J.Gorres, G.Hale, F.Kappeler, R.Reifarth, U.Giesen, E.Stech, P.Tischhauser, C.Ugalde, M.Wiescher A Measurement of the 13C(α, α) Differential Cross Section and Its Application to the 13C(α, n) Reaction NUCLEAR REACTIONS 13C(α, α), E=2.6-6.2 MeV; measured σ(θ). 13C(α, n), E=0-2 MeV; calculated σ, S-factor following r-matrix analysis of elastic scattering data. Comparison with earlier results for s-process conditions.
doi: 10.1016/S0375-9474(01)00768-0
2000GO43 Phys.Rev. C62, 055801 (2000) J.Gorres, C.Arlandini, U.Giesen, M.Heil, F.Kappeler, H.Leiste, E.Stech, M.Wiescher Low-Energy Resonances in 14N(α, γ)18F and Their Astrophysical Implications NUCLEAR REACTIONS 14N(α, γ), E=550-1300 keV; measured Eγ, Iγ(t), resonance yields; deduced astrophysical reaction rates. 18F deduced resonance energies, strengths. Implications for isotopic abundances discussed.
doi: 10.1103/PhysRevC.62.055801
1999SC48 Nucl.Phys. (Supplement) A654, 924c (1999) H.Schatz, A.Bacher, G.P.A.Berg, T.C.Black, S.Choi, C.C.Foster, J.Gorres, K.Jiang, W.Lozowski, E.Stech, E.J.Stephenson, P.Tischhauser, M.Wiescher Tz = -1 Nuclei in the rp-Process - Astrophysical Implications and a New Experimental Approach NUCLEAR REACTIONS 28Si(α, 8He), E=177.7 MeV; measured particle spectra. 24Si deduced excited states. Astrophysical implications discussed.
doi: 10.1016/S0375-9474(00)88574-7
1998GO05 Phys.Rev.Lett. 80, 2554 (1998) J.Gorres, J.Meissner, H.Schatz, E.Stech, P.Tischhauser, M.Wiescher, D.Bazin, R.Harkewicz, M.Hellstrom, B.Sherrill, M.Steiner, R.N.Boyd, L.Buchmann, D.H.Hartmann, J.D.Hinnefeld Half-Life of 44Ti as a Probe for Supernova Models RADIOACTIVITY 44Ti(EC) [from 46Ti fragmentation]; measured T1/2. Astrophysical implications.
doi: 10.1103/PhysRevLett.80.2554
1997SC36 Phys.Rev.Lett. 79, 3845 (1997) H.Schatz, J.Gorres, H.Herndl, N.I.Kaloskamis, E.Stech, P.Tischhauser, M.Wiescher, A.Bacher, G.P.A.Berg, T.C.Black, S.Choi, C.C.Foster, K.Jiang, E.J.Stephenson First Measurement of Excited States in the Very Proton Rich Nucleus 24Si and the Consequences for 22Na Nucleosynthesis in Novae NUCLEAR REACTIONS 28Si(α, 8He), E=177.7 MeV; measured 8He spectrum. 24Si deduced levels. 23Al(p, γ), E not given; calculated reaction rate vs temperature. Astrophysical implications.
doi: 10.1103/PhysRevLett.79.3845
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