NSR Query Results
Output year order : Descending NSR database version of March 21, 2024. Search: Author = R.J.de Boer Found 16 matches. 2015CH19 J.Phys.(London) G42, 055102 (2015) L.C.Chamon, L.R.Gasques, G.P.A.Nobre, E.S.Rossi, Jr, R.J.de Boer, C.Seymour, M.Wiescher, G.G.Kiss Evidence of a slight nuclear transparency in the alpha-nucleus systems NUCLEAR REACTIONS 120,130Te(α, α'), E<15 MeV; calculated inelastic σ(θ). EMPIRE nuclear model code, comparison with available data.
doi: 10.1088/0954-3899/42/5/055102
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
2014CH06 J.Phys.(London) G41, 035101 (2014) L.C.Chamon, L.R.Gasques, L.F.M.Alves, V.Guimaraes, P.Descouvemont, R.J.de Boer, M.Wiescher Effect of the inelastic couplings on the scattering of alpha particles by 12C at low energies NUCLEAR REACTIONS 12C(α, α), (α, X)16O, E=7.85-10.42 MeV; analyzed available data, σ and S-factors; deduced the effect of the coupling of the first 2+ state in 12C.
doi: 10.1088/0954-3899/41/3/035101
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
2014MO35 Nucl.Instrum.Methods Phys.Res. A767, 359 (2014) D.J.Mountford, R.J.de Boer, P.Descouvemont, A.St.J.Murphy, E.Uberseder, M.Wiescher Evaluation of the implementation of the R-matrix formalism with reference to the astrophysically important 18F(pα)15O reaction NUCLEAR REACTIONS 18F(p, α), E(cm)=0.6-1.6 MeV; calculated resonance parameter widths, σ(θ), S-factors. R-matrix formalism, AZURE code.
doi: 10.1016/j.nima.2014.08.047
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
2013HE21 Phys.Lett. B 725, 287 (2013) J.J.He, S.Z.Chen, C.E.Rolfs, S.W.Xu, J.Hu, X.W.Ma, M.Wiescher, R.J.de Boer, T.Kajino, M.Kusakabe, L.Y.Zhang, S.Q.Hou, X.Q.Yu, N.T.Zhang, G.Lian, Y.H.Zhang, X.H.Zhou, H.S.Xu, G.Q.Xiao, W.L.Zhan A drop in the 6Li(p, γ)7Be reaction at low energies NUCLEAR REACTIONS 6Li(p, γ), E(cm)<1 MeV; measured reaction products, Eγ, Iγ; deduced S-factors, positive-parity resonance. Comparison with available data, SUSY assisted Big-bang Nucleosynthesis models.
doi: 10.1016/j.physletb.2013.07.044
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
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
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
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
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