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NSR database version of April 27, 2024.

Search: Author = L.Hlophe

Found 12 matches.

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2023HE08      J.Phys.(London) G50, 060501 (2023)

C.Hebborn, F.M.Nunes, G.Potel, W.H.Dickhoff, J.W.Holt, M.C.Atkinson, R.B.Baker, C.Barbieri, G.Blanchon, M.Burrows, R.Capote, P.Danielewicz, M.Dupuis, C.Elster, J.E.Escher, L.Hlophe, A.Idini, H.Jayatissa, B.P.Kay, K.Kravvaris, J.J.Manfredi, A.Mercenne, B.Morillon, G.Perdikakis, C.D.Pruitt, G.H.Sargsyan, I.J.Thompson, M.Vorabbi, T.R.Whitehead

Optical potentials for the rare-isotope beam era

doi: 10.1088/1361-6471/acc348
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2023HL01      Phys.Rev. C 107, 014315 (2023)

L.Hlophe, K.Kravvaris, S.Quaglioni

Quantifying uncertainties due to irreducible three-body forces in deuteron-nucleus reactions

NUCLEAR REACTIONS 2H(α, α), E(cm)<1.8 MeV; calculated elastic scattering σ(θ, E), phase shifts. Ab initio no-core shell model coupled with the resonating group method (NCSM/RGM) and Faddeev type equations. Studied the irreducible n-p-α three-body forces arising from antisymmetrization effects and quantified its impact on observables of the d+α system. Comparison to available experimental data.

NUCLEAR STRUCTURE 2H, 4He, 6Li; calculated ground-state energy. Comparison of Faddeev calculations with no-core shell model coupled with the resonating group method (NCSM/RGM).

doi: 10.1103/PhysRevC.107.014315
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2020QU01      Phys.Rev. C 102, 024606 (2020)

M.Quinonez, L.Hlophe, F.M.Nunes

Properties of a separable representation of optical potentials

NUCLEAR REACTIONS 48Ca(n, n), E=5-2400 MeV; calculated real part of the S matrix as a function of the scattering energy, radial dependence of the real part of the separable interaction. 16O, 48Ca(n, n), E=5, 20 MeV; calculated nonlocality parameters of the separable interactions for l=0 and 1 interactions. Generalized Ersnt-Shakin-Thaler (EST) scheme to generate separable interactions starting from local optical potentials such as energy-dependent CH89 global optical potential.

doi: 10.1103/PhysRevC.102.024606
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2019HL01      Phys.Rev. C 100, 034609 (2019)

L.Hlophe, J.Lei, Ch.Elster, A.Nogga, F.M.Nunes, D.Jurciukonis, A.Deltuva

Deuteron-α scattering: Separable versus nonseparable Faddeev approach

NUCLEAR REACTIONS 4He(d, d), (d, np), E=10, 20, 50 MeV; calculated differential σ(E) for elastic and breakup reactions using the momentum-space Faddeev Alt-Grassberger-Sandhas (AGS) framework.

doi: 10.1103/PhysRevC.100.034609
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2018LE16      Phys.Rev. C 98, 051001 (2018)

J.Lei, L.Hlophe, Ch.Elster, A.Nogga, F.M.Nunes, D.R.Phillips

Few-body universality in the deuteron-α system

NUCLEAR STRUCTURE 6Li; calculated d-α S-wave scattering length and absolute value of the n-p-α three body separation energy using variety of phase-shift equivalent nucleon-nucleon and α-nucleon interactions; interpreted as a deuteron or two-nucleon halo nucleus from dα and 6Li correlation.

doi: 10.1103/PhysRevC.98.051001
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2017HL01      Phys.Rev. C 95, 054617 (2017)

L.Hlophe, Ch.Elster

Separable representation of multichannel nucleon-nucleus optical potentials

NUCLEAR REACTIONS 12C(n, n), (n, n'), E=0-50 MeV; calculated energy-dependent EST separable representation of multichannel S-matrix elements, differential σ(θ, E), real part of the t-matrix elements, asymmetry as function of the off-shell momenta. 12C(p, p), (p, p'), E=35.2, 65 MeV; calculated differential σ(θ, E), real part of half-shell multichannel t-matrix elements. Separable expansion of neutron-nucleus deformed optical model potentials (DOMPs). Solution of momentum space Lippmann-Schwinger integral equations to obtain form factors for energy-dependent separable representation based on generalization of the Ernst-Shakin-Thaler (EST) scheme. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.054617
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2017HL02      Phys.Rev. C 96, 064003 (2017)

L.Hlophe, J.Lei, C.Elster, A.Nogga, F.M.Nunes

6Li in a three-body model with realistic Forces: Separable versus nonseparable approach

NUCLEAR STRUCTURE 6Li; calculated three-body binding energies for the ground state, momentum distributions of different pairs in the ground state of 6Li, by solving momentum-space Faddeev equations using separable interactions based on the Ernst-Shakin-Thaler (EST) scheme, and with CD-Bonn interaction for the np pair and Bang potential for the n(p)-α subsystems.

doi: 10.1103/PhysRevC.96.064003
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2016HL01      Phys.Rev. C 93, 034601 (2016)

L.Hlophe, Ch.Elster

Separable representation of energy-dependent optical potentials

NUCLEAR REACTIONS 48Ca, 208Pb(n, n), E=0-50 MeV; calculated S matrix with the CH89 optical potential, and the energy-dependent Ernst-Shakin-Thaler (eEST) separable representation. 48Ca(n, n'), E=16, 29, 40, 47 MeV; 208Pb(n, n'), E=5, 11, 15, 21, 36, 47 MeV; calculated partial wave off-shell t-matrix elements, and asymmetry from CH89 phenomenological optical potential, and from its energy-independent EST separable representation. Solution of momentum space Lippmann-Schwinger integral equations with standard techniques to obtain form factors for the separable representation of energy-dependent neutron- and proton-optical potentials. Reciprocity theorem.

doi: 10.1103/PhysRevC.93.034601
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2014ES03      Phys.Rev. C 89, 054605 (2014)

J.E.Escher, I.J.Thompson, G.Arbanas, Ch.Elster, V.Eremenko, L.Hlophe, F.M.Nunes

Reexamining surface-integral formulations for one-nucleon transfers to bound and resonance states

NUCLEAR REACTIONS 90Zr(d, p), E=11 MeV; 48Ca(d, p), E=13, 19.3, 56 MeV; 20O(d, p), E=21 MeV; calculated σ(θ, E), interior, surface, and exterior contributions to the transfer reaction for bound states and resonances. Improvements to surface-integral approach. R-matrix theory, and finite range distorted-wave Born approximation (DWBA) calculations using reaction code FRESCO. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.054605
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2014HL01      Phys.Rev. C 90, 061602 (2014)

L.Hlophe, V.Eremenko, Ch.Elster, F.M.Nunes, G.Arbanas, J.E.Escher, I.J.Thompson, for the TORUS Collaboration

Separable representation of proton-nucleus optical potentials

NUCLEAR REACTIONS 12C, 48Ca(p, p), E=38 MeV; 208Pb(p, p), E=45 MeV; calculated S-matrix elements and σ(θ); deduced effects of the short-range Coulomb potential on the proton-nucleus form factor. Comparison with coordinate space calculations. Generalization of the Ernst-Shakin-Thaler (EST) scheme.

doi: 10.1103/PhysRevC.90.061602
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2014UP02      Phys.Rev. C 90, 014615 (2014)

N.J.Upadhyay, V.Eremenko, L.Hlophe, F.M.Nunes, Ch.Elster, G.Arbanas, J.E.Escher, I.J.Thompson

Coulomb problem in momentum space without screening

NUCLEAR REACTIONS 2H(12C, p), E(cm)=30 MeV; 2H(48Ca, p), E(cm)=36 MeV; 2H(208Pb, p), E(cm)=36, 39 MeV; calculated Coulomb-distorted form factors for (d, p) reactions and dependence on charge, angular momentum, and energy. Regularization techniques using a separable interaction derived from realistic nucleon-nucleus optical potential

doi: 10.1103/PhysRevC.90.014615
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2013HL01      Phys.Rev. C 88, 064608 (2013)

L.Hlophe, Ch.Elster, R.C.Johnson, N.J.Upadhyay, F.M.Nunes, G.Arbanas, V.Eremenko, J.E.Escher, I.J.Thompson

Separable representation of phenomenological optical potentials of Woods-Saxon type

NUCLEAR REACTIONS 48Ca, 132Sn, 208Pb(n, X), E=0-50 MeV; calculated partial wave S matrices, separable representations of two-body transition matrix elements and potentials. Ernst-Shakin-Thaler (EST) scheme with CH89 potential.

doi: 10.1103/PhysRevC.88.064608
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