NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = S.P.Weppner Found 19 matches. 2024RA12 J.Phys.(London) G51, 045101 (2024) V.Ranga, I.Mazumdar, S.P.Weppner, S.Panwar, R.Sariyal, S.M.Patel, P.B.Chavan, A.K.Rhine Kumar, G.Anil Kumar Measurement of proton induced absolute production cross-section of 6.13, 6.92 and 7.12 MeV γ-rays from 16O(p, p'γ)16O reaction NUCLEAR REACTIONS 16O(p, p'), E=6-7 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray production σ. Comparison with a detailed phenomenological optical model potential (OMP), resonance analysis. The TIFR-BARC Pelletron facility at TIFR, Mumbai.
doi: 10.1088/1361-6471/ad1fd3
2023BA32 Phys.Rev. C 108, 044617 (2023) R.B.Baker, M.Burrows, Ch.Elster, P.Maris, G.Popa, S.P.Weppner Nuclear structure and elastic scattering observables obtained consistently with different NN interactions
doi: 10.1103/PhysRevC.108.044617
2022BA43 Phys.Rev. C 106, 064605 (2022) R.B.Baker, B.McClung, Ch.Elster, P.Maris, S.P.Weppner, M.Burrows, G.Popa Ab initio nucleon-nucleus elastic scattering with chiral effective field theory uncertainties NUCLEAR REACTIONS 16O(p, p), E=65, 100, 135, 180 MeV; 12C(p, p), E=65, 100, 122, 160 MeV; 12C(n, n), E=65, 95, 155, 185 MeV; calculated σ(E), σ(θ, E), expansion parameter, analyzing power, spin rotation function, Wolfenstein amplitudes. Quantified the truncation uncertainty arising from each order in the chiral EFT. Calculations in frameworks of the spectator expansion of multiple scattering theory as well as the nocore shell model with chiral interaction from the LENPIC collaboration up to the third chiral order. Comparison to available experimental data.
doi: 10.1103/PhysRevC.106.064605
2021BA24 Phys.Rev. C 103, 054314 (2021) R.B.Baker, M.Burrows, Ch.Elster, K.D.Launey, P.Maris, G.Popa, S.P.Weppner Nuclear spin features relevant to ab initio nucleon-nucleus elastic scattering NUCLEAR STRUCTURE 4,6,8He; calculated neutron and proton spin-projected, one-body momentum distributions using NNLOopt chiral interaction, magnetic moments of the 2+ excited states in the ground state rotational bands; deduced spin content of a J=0 wave function, connection between reaction observables such as analyzing powers and structure observables such as magnetic moments in the framework of the spectator expansion with no-core shell model. Relevance to effective interactions for elastic nucleon-nucleus scattering.
doi: 10.1103/PhysRevC.103.054314
2020BU11 Phys.Rev. C 102, 034606 (2020) M.Burrows, R.B.Baker, Ch.Elster, S.P.Weppner, K.D.Launey, P.Maris, G.Popa Ab initio leading order effective potentials for elastic nucleon-nucleus scattering NUCLEAR REACTIONS 1H(n, n), (p, p), E=100, 200 MeV; calculated Wolfenstein amplitudes as function of the scatting angle and momentum transfer for NNLOopt chiral interaction, and CD-Bonn potential. 4,6,8He, 12C, 16O(p, p), (polarized p, p), E=65, 71, 100, 122, 200 MeV; calculated differential σ(θ, E), analyzing powers Ay(θ, E) with NNLOopt chiral interaction; deduced leading order ab initio effective potential for nucleon-nucleus elastic scattering using the spectator expansion of multiple scattering theory. 12C, 16O(n, n), E=60-210 MeV; calculated σ(E). Comparison with experimental data.
doi: 10.1103/PhysRevC.102.034606
2019BU09 Phys.Rev. C 99, 044603 (2019) M.Burrows, Ch.Elster, S.P.Weppner, K.D.Launey, P.Maris, A.Nogga, G.Popa Ab initio folding potentials for nucleon-nucleus scattering based on no-core shell-model one-body densities NUCLEAR REACTIONS 4,6He, 12C, 16O(p, p), (polarized p, p), E=100, 122, 135, 150, 160, 200 MeV; 16O(n, n), E=60-200 MeV; calculated σ(E, θ), Ay(θ, E), and point-proton rms radii using Lippmann-Schwinger equation with folding potential obtained from translationally invariant no-core shell model (NCSM) one-body density and the off-shell Wolfenstein amplitudes, with chiral next-to-next-to-leading order (NNLO) interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.99.044603
2019MA89 Acta Phys.Pol. B50, 377 (2019) I.Mazumdar, M.Dhibar, S.P.Weppner, G.Anil Kumar, A.K.R.Kumar, S.M.Patel, P.B.Chavan, C.D.Bagdia, L.C.Tribedi Studies in Nuclear Structure and Big Bang Nucleosynthesis Using Proton Beams NUCLEAR REACTIONS 12C(p, p'γ), E=8-22 MeV; measured Eγ, Iγ; deduced total σ, σ(θ); calculated total σ and s(θ) using coupled-channels model and single particle model taking into account resonances in 12C. 2H(p, γ), E=100, 175, 250 keV; measured Eγ, Iγ; deduced σ, astrophysical S-factor.
doi: 10.5506/aphyspolb.50.377
2018WE08 J.Phys.(London) G45, 095102 (2018) A nucleon-nucleus optical model for A ≤ 13 nuclei at 65-75MeV projectile energy NUCLEAR REACTIONS 4He(p, p), 1H(6He, p), (8He, p), E=71 MeV; 6,7Li(p, p), E=71, 65 MeV; 9Be(p, p), E=75 MeV; 12,13C(p, p), E=70, 72 MeV; 12C(n, n), E=75 MeV; calculated σ(θ), σ; deduced optical model parameters. Comparison with experimental data.
doi: 10.1088/1361-6471/aad53d
2013OR02 Phys.Rev. C 88, 034610 (2013) A.Orazbayev, Ch.Elster, S.P.Weppner Open shell effects in a microscopic optical potential for elastic scattering of 6(8)He NUCLEAR REACTIONS 6,8He(p, p), E=71, 100, 200 MeV/nucleon; calculated differential σ(θ, E) and analyzing power Ay(θ, E) as function of momentum transfer, and with variation of matter and charge radii. Optical potential model with single-particle density matrix for 6,8He from simple harmonic oscillator. Comparison with experimental data.
doi: 10.1103/PhysRevC.88.034610
2012WE02 Phys.Rev. C 85, 044617 (2012) Elastic scattering of 6He based on a cluster description NUCLEAR REACTIONS 4,6He(p, p), E=71, 100, 200 MeV/nucleon; calculated differential cross section, σ(q), analyzing powers. Optical potential. Cluster description of 6He as 4He+2n system. Folding-cluster model. Comparison with experimental data.
doi: 10.1103/PhysRevC.85.044617
2009WE04 Phys.Rev. C 80, 034608 (2009); Erratum Phys.Rev. C 89, 049904 (2014) S.P.Weppner, R.B.Penney, G.W.Diffendale, G.Vittorini Isospin dependent global nucleon-nucleus optical model at intermediate energies NUCLEAR REACTIONS 12C, 14N, 16O, 19F, 27Al, 28Si, 31P, 32S, 39K, 40Ca, 48Ti, 51V, 52Cr, 55Mn, 56Fe, 59Co(n, n), E=25-155 MeV; 12,13C, 16,18,20,22O, 27Al, 28Si, 30S, 34,40,42,44Ar, 40,42,44,48Ca, 45Sc, 50,52,54Cr, 54,56Fe, 58Ni(p, p), E=25-155 MeV; analyzed σ, σ(θ) using isospin dependent global nucleon-nucleus optical model. 12,13C, 16O, 28Si, 44Ar, 40,42,44,48Ca, 48,50Ti, 50,52,54Cr, 54,56Fe, 58Ni, 59Ni(polarized p, p), E=30-152 MeV; analyzed vector analyzing powers using isospin dependent global nucleon-nucleus optical model.
doi: 10.1103/PhysRevC.80.034608
2006PI08 Nucl.Phys. A778, 10 (2006) Insensitivity of the elastic proton-nucleus reaction to the neutron radius of 208Pb NUCLEAR REACTIONS 208Pb(p, p), E=500, 800 MeV; calculated σ(θ); deduced sensitivity to neutron radius. Non-relativistic impulse approximation approach.
doi: 10.1016/j.nuclphysa.2006.08.004
2000WE03 Phys.Rev. C61, 044601 (2000) S.P.Weppner, O.Garcia, Ch.Elster Sensitivities of the Proton-Nucleus Elastic Scattering Observables of 6He and 8He at Intermediate Energies NUCLEAR REACTIONS 6,8He(polarized p, p), E=66-100 MeV; calculated σ(θ), Ay(θ); deduced sensitivity to structure effects. Several models compared.
doi: 10.1103/PhysRevC.61.044601
1998EL01 Phys.Rev. C57, 189 (1998); Comment Phys.Rev. C59, 1813 (1999) Energy Dependence of the NN t Matrix in the Optical Potential for Elastic Nucleon-Nucleus Scattering NUCLEAR REACTIONS 16O, 40Ca, 208Pb(polarized p, p), E=65-200 MeV; calculated σ(θ), A(y), spin rotation function; deduced NN t matrix energy dependence. Full-folding model, impulse approximation. Comparison with data.
doi: 10.1103/PhysRevC.57.189
1998WE03 Phys.Rev. C57, 1378 (1998) S.P.Weppner, Ch.Elster, D.Huber Off-Shell Structures of Nucleon-Nucleon t Matrices and Their Influence on Nucleon-Nucleus Elastic Scattering Observables NUCLEAR REACTIONS 16O(polarized p, p), E=135, 200 MeV; 40Ca(polarized p, p), E=160, 200 MeV; 208Pb(polarized p, p), E=200 MeV; analyzed σ(θ), A(y)(θ), spin rotation function; deduced sensitivity to off-shell structures.
doi: 10.1103/PhysRevC.57.1378
1997EL13 Phys.Rev. C56, 2080 (1997) Ch.Elster, S.P.Weppner, C.R.Chinn Full-Folding Optical Potentials for Elastic Nucleon-Nucleus Scattering Based on Realistic Densities NUCLEAR REACTIONS 16O(polarized p, p), E=400, 500 MeV; 40Ca(polarized p, p), E=100 MeV; 90Zr(polarized p, p), E=80 MeV; 208Pb(polarized p, p), E=200 MeV; analyzed σ(θ), A(y), spin rotation function; deduced optical model parameters. 12C, 16O, 28Si, 40Ca, 90Zr, 208Pb(n, n), E=50-500 MeV; analyzed total σ. Full-folding integral, realistic densities.
doi: 10.1103/PhysRevC.56.2080
1995CH08 Phys.Rev. C51, 1033 (1995) C.R.Chinn, Ch.Elster, R.M.Thaler, S.P.Weppner Total Cross Sections for Neutron Scattering NUCLEAR REACTIONS 16O, 40Ca(n, n), E ≈ 50-700 MeV; calculated σ(E). 16O(polarized n, n), E=100, 500 MeV; calculated σ(θ), analyzing power, spin rotation function vs θ. 16O(n, n), E=50-700 MeV; calculated elastic, reaction σ(E). Watson expansion based microscopic first-order optical potential.
doi: 10.1103/PhysRevC.51.1033
1995CH12 Phys.Rev. C51, 1418 (1995) C.R.Chinn, Ch.Elster, R.M.Thaler, S.P.Weppner Application of Multiple Scattering Theory to Lower-Energy Elastic Nucleon-Nucleus Scattering NUCLEAR REACTIONS 12C, 16O, 28Si, 40Ca, 56Fe, 90Zr, 208Pb(polarized p, p), (polarized n, n), E=65 MeV; analyzed σ(θ), analyzing power, spin rotation function vs θ. First-order multiple scattering theory.
doi: 10.1103/PhysRevC.51.1418
1995CH44 Phys.Rev. C52, 1992 (1995) C.R.Chinn, Ch.Elster, R.M.Thaler, S.P.Weppner Propagator Modifications in Elastic Nucleon-Nucleus Scattering within the Spectator Expansion NUCLEAR REACTIONS 12C, 16O, 28Si, 40Ca, 90Zr, 208Pb(n, n), E ≤ 400 MeV; analyzed σ(E). 12C(polarized p, p), E=200 MeV; 16O(polarized p, p), E=100-318 MeV; 28Si(polarized p, p), E=80-200 MeV; 40Ca(polarized p, p), E=80 MeV; 90Zr(polarized p, p), E=65-160 MeV; 208Pb(polarized p, p), E=80, 200 MeV; analyzed σ(θ), analyzing power, spin rotation function vs θ data. Spectator expansion of optical potential.
doi: 10.1103/PhysRevC.52.1992
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