NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = G.Popa Found 12 matches. 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 ^{16}O(p, p), E=65, 100, 135, 180 MeV; ^{12}C(p, p), E=65, 100, 122, 160 MeV; ^{12}C(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 ^{4,6,8}He; calculated neutron and proton spin-projected, one-body momentum distributions using NNLO_{opt} 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 ^{1}H(n, n), (p, p), E=100, 200 MeV; calculated Wolfenstein amplitudes as function of the scatting angle and momentum transfer for NNLO_{opt} chiral interaction, and CD-Bonn potential. ^{4,6,8}He, ^{12}C, ^{16}O(p, p), (polarized p, p), E=65, 71, 100, 122, 200 MeV; calculated differential σ(θ, E), analyzing powers A_{y}(θ, E) with NNLO_{opt} chiral interaction; deduced leading order ab initio effective potential for nucleon-nucleus elastic scattering using the spectator expansion of multiple scattering theory. ^{12}C, ^{16}O(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 ^{4,6}He, ^{12}C, ^{16}O(p, p), (polarized p, p), E=100, 122, 135, 150, 160, 200 MeV; ^{16}O(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
2018BU04 Phys.Rev. C 97, 024325 (2018) M.Burrows, Ch.Elster, G.Popa, K.D.Launey, A.Nogga, P.Maris Ab initio translationally invariant nonlocal one-body densities from no-core shell-model theory NUCLEAR STRUCTURE ^{4}He, ^{6}Li, ^{12}C, ^{16}O; calculated translationally invariant local one-body densities, and K=0 components of the translationally invariant nonlocal one-body density from ab initio no-core shell-model (NCSM) and symmetry-adapted NCSM (SA-NCSM) calculations using the JISP16 nucleon-nucleon interaction; formulation for removing center-of-mass contributions from nonlocal one-body densities.
doi: 10.1103/PhysRevC.97.024325
2005PO22 Eur.Phys.J. A 25, Supplement 1, 451 (2005) G.Popa, A.Aprahamian, A.Georgieva, J.P.Draayer Systematics in the structure of low-lying, non-yrast band-head configurations of strongly deformed nuclei NUCLEAR STRUCTURE ^{152}Nd, ^{156}Sm, ^{156,160}Gd, ^{160,164}Dy, ^{164,168}Er, ^{168,172}Yb, ^{172,176}Hf; calculated band-head energies, collective properties. Pseudo-SU(3) model.
doi: 10.1140/epjad/i2005-06-140-y
2004PO12 Phys.Rev. C 69, 064307 (2004) G.Popa, A.Georgieva, J.P.Draayer Systematics in the structure of low-lying, nonyrast bandhead configurations of strongly deformed nuclei NUCLEAR STRUCTURE ^{152}Nd, ^{156}Sm, ^{160}Gd, ^{164}Dy, ^{168}Er, ^{172}Yb, ^{176}Hf; calculated ground and excited states energies, configurations. Pseudo-SU(3) model, F-spin classification.
doi: 10.1103/PhysRevC.69.064307
2002HI24 Acta Phys.Hung.N.S. 16, 291 (2002) J.G.Hirsch, G.Popa, C.E.Vargas, J.P.Draayer Microscopic Description of Odd- and Even-Mass Er Isotopes NUCLEAR STRUCTURE ^{164,165,166,167,168}Er; calculated rotational bands levels, J, π, B(E2). Pseudo-SU(3) scheme, comparison with data.
doi: 10.1556/APH.16.2002.1-4.32
2001DR06 Acta Phys.Pol. B32, 2697 (2001) J.P.Draayer, G.Popa, J.G.Hirsch E2 and M1 Strengths in Heavy Deformed Nuclei NUCLEAR STRUCTURE ^{160,162,164}Dy, ^{168}Er; calculated levels, B(E2), B(M1). Pseudo-SU(3) model, comparisons with data.
2000PO30 Phys.Rev. C62, 064313 (2000) G.Popa, J.G.Hirsch, J.P.Draayer Shell Model Description of Normal Parity Bands in Even-Even Heavy Deformed Nuclei NUCLEAR STRUCTURE ^{156,158,160}Gd; calculated levels, J, π, B(M1), B(E2) strength distributions. Pseudo-SU(3) model, comparisons with data.
doi: 10.1103/PhysRevC.62.064313
1997BA24 Nucl.Phys. A617, 368 (1997) T.Badica, R.Dumitrescu, E.Iacob, A.Olariu, G.Popa, I.V.Popescu, N.Scantei Spectroscopic Study of the ^{54}Fe(^{16}O, pn)^{68}As Reaction NUCLEAR REACTIONS ^{54}Fe(^{16}O, np), E=42-63 MeV; measured Eγ, Iγ, nγγ-coin, relative excitation functions, Iγ(θ), linear polarization. ^{68}As deduced levels, J, π, δ. Enriched ^{54}Fe target, hyperpure Ge and NE203 detectors, two-crystal hyperpure Ge polarimeter.
doi: 10.1016/S0375-9474(96)00446-0
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