NSR Query Results
Output year order : Descending NSR database version of April 24, 2024. Search: Author = C.Johnson Found 180 matches. Showing 1 to 100. [Next]2023FO05 Phys.Rev. C 108, 054310 (2023) J.M.R.Fox, C.W.Johnson, R.N.Perez Uncertainty quantification of transition operators in the empirical shell model
doi: 10.1103/PhysRevC.108.054310
2023HE12 Phys.Rev. C 108, 024304 (2023) N.D.Heller, G.H.Sargsyan, K.D.Launey, C.W.Johnson, T.Dytrych, J.P.Draayer New insights into backbending in the symmetry-adapted shell-model framework NUCLEAR STRUCTURE 48Cr, 20Ne; calculated levels, J, π, backbending, excitation energy vs angular momentum for rotational bands, yrast bands structure, moments of inertia. Symmetry-adapted no-core shell model (SA-NCSM) with the NNLO chiral potential and symmetry-adapted shell model (SA-SM) with the GXPF1 interaction. Comparison to experimental values.
doi: 10.1103/PhysRevC.108.024304
2023JO06 J.Phys.(London) G50, 045110 (2023) Proton-neutron entanglement in the nuclear shell model NUCLEAR STRUCTURE 20Ne, 36Ar, 22Na, 34Cl, 24Mg, 32S, 26Al, 30P, 28Si, 28,40Ne, 56Ar; calculated the proton-neutron entanglement entropy in the interacting nuclear shell model for a variety of nuclides and interactions; deduced that the entanglement entropy at low excitation energy tends to decrease for nuclides when N is not equal Z.
doi: 10.1088/1361-6471/acbece
2022CI08 J.Phys.(London) G49, 120502 (2022) V.Cirigliano, Z.Davoudi, J.Engel, R.J.Furnstahl, G.Hagen, U.Heinz, H.Hergert, M.Horoi, C.W.Johnson, A.Lovato, E.Mereghetti, W.Nazarewicz, A.Nicholson, T.Papenbrock, S.Pastore, M.Plumlee, D.R.Phillips, P.E.Shanahan, S.R.Stroberg, F.Viens, A.Walker-Loud, K.A.Wendt, S.M.Wild Towards precise and accurate calculations of neutrinoless double-beta decay RADIOACTIVITY 48Ca(2β-); calculated neutrinoless nuclear matrix elements using chiral-EFT interactions, EDF, IBM, QRPA, SM-pf, SM-sdpf, SM-MBPT, RSM, QMC+SM, IM-GCM, VS-IMSRG, CCSD, CCSD-T1.
doi: 10.1088/1361-6471/aca03e
2022HE03 Phys.Rev. C 105, 015801 (2022) R.A.Herrera, C.W.Johnson, G.M.Fuller Modified Brink-Axel hypothesis for astrophysical Gamow-Teller transitions RADIOACTIVITY 53,55,56Fe, 57Co(EC), 55Cr(β-); calculated B(GT) for 53Fe to 53Mn, 55Fe to 55Mn, 56Fe to 56Mn, and 57Co to 57Fe from two adjacent initial states with excitation energies near 4.5 MeV, running sums of the strength functions for 53Fe to 53Mn, and 55Cr to 55Mn, transition strength running sums, thermal electron capture rates, and thermal positron emission rates for 57Co to 57Fe. 28Si(EC); calculated running sum of the strength function for 28Si to 28Al. Modified "local" Brink-Axel hypothesis for Gamow-Teller transitions for pf-shell nuclei in astrophysical applications. Relevance to computing accurate thermal weak transition rates for medium-mass nuclei at temperatures occurring in stellar cores near collapse stage.
doi: 10.1103/PhysRevC.105.015801
2022LU03 Phys.Rev. C 105, 034317 (2022) Y.Lu, Y.Lei, C.W.Johnson, J.Shen Nuclear states projected from a pair condensate NUCLEAR STRUCTURE 22,24,26,28,30,32,34Si, 46,48Ca, 48,50Ti, 50,52Cr, 104Sn, 106Te, 108Xe; calculated levels J, π, B(E2). 52Fe; calculated backbending of yrast state band. 124,126Xe, 126,128Ba; calculated levels J, π. Projection after variation of pair condensates (PVPC) method. Comparison to experimental data and projected Hartree-Fock (PHF) and shell-model calculations.
doi: 10.1103/PhysRevC.105.034317
2022NA17 J.Phys.(London) G49, 065201 (2022) J.-U.Nabi, M.Nayab, C.W.Johnson How effective is the Brink-Axel hypothesis for astrophysical weak rates? RADIOACTIVITY 31,32Si, 27Mg(β-), 34Ar, 27S, 30Cl(EC); calculated stellar rates using the Brink-Axel hypothesis (BAH).
doi: 10.1088/1361-6471/ac58b1
2022YU04 Phys.Rev. C 106, 044309 (2022) Y.X.Yu, Y.Lu, G.J.Fu, C.W.Johnson, Z.Z.Ren Nucleon-pair truncation of the shell model for medium-heavy nuclei NUCLEAR STRUCTURE 44,46,48Ti, 48,50Cr, 52Fe, 60,62,64Zn, 66,68Ge, 68Se, 108,110Xe, 112,114Ba, 116,118,120Ce; calculated levels, J, π, yrast states, B(E2). Particle-number conserved Bardeen-Cooper-Schrieffer (NBCS) approximation developed for implementing efficient truncation scheme in the frame of shell-model. Comparison to experimental data.
doi: 10.1103/PhysRevC.106.044309
2021CE01 Phys.Rev. C 104, 024305 (2021) M.J.Cervia, A.B.Balantekin, S.N.Coppersmith, C.W.Johnson, P.J.Love, C.Poole, K.Robbins, M.Saffman Lipkin model on a quantum computer
doi: 10.1103/PhysRevC.104.024305
2021DA11 Phys.Rev. C 103, 064327 (2021) B.Dai, B.S.Hu, Y.Z.Ma, J.G.Li, S.M.Wang, C.W.Johnson, F.R.Xu Tensor force role in β decays analyzed within the Gogny-interaction shell model NUCLEAR STRUCTURE 10,11,12,13,14,15C; calculated levels, J, π, ground-state energies. 10,11,12,13,14,15N; calculated ground-state energies. Shell-model calculations with the effective interaction derived from D1S Gogny interaction with and without the tensor force. 15,17O; calculated spectra using the Single-particle energies (SPEs) and two-body matrix elements (TBMEs) from the D1S interaction. Comparison with theoretical calculations using WBP interaction, and with experimental data. RADIOACTIVITY 10,11C, 12,13N(β+); 14,15C(β-); calculated β spectra, B(GT) using shell model within the p-sd space and the D1S Gogny interaction with different components of tensor force. Comparison with theoretical calculations using WBP interaction, and with experimental data. Relevance to anomalously long half-life of 14C decay, and role of tensor force, cross-shell mixing, and three-body forces in β decay.
doi: 10.1103/PhysRevC.103.064327
2021FU05 Phys.Rev. C 103, L021302 (2021) G.J.Fu, C.W.Johnson, P.Van Isacker, Z.Ren Nucleon-pair coupling scheme in Elliott's SU(3) model NUCLEAR STRUCTURE 52Fe; calculated energies of the levels and B(E2) in the ground band up to 10+ using the shell-model with the GXPF1 interaction, and compared with experimental data. Representation of SU(3) symmetry in nucleon-pair approximation (NPA) truncation scheme of the shell-model configuration space.
doi: 10.1103/PhysRevC.103.L021302
2021FU13 Phys.Rev. C 104, 024312 (2021) Nucleon-pair approximation for nuclei from spherical to deformed regions NUCLEAR STRUCTURE 46Ca, 44,46,48Ti, 48,50Cr, 52Fe, 60,62,64Zn, 64,66Ge, 84Mo, 108,110,112Xe, 112,114Ba; calculated yrast positive-parity levels, B(E2), magnetic dipole moment for the first 2+ states using nucleon-pair approximation (NPA) of the shell model with three approaches: generalized seniority scheme, conjugate gradient method, and Hartree-Fock approach for medium- and heavy-mass nuclei. Comparison with experimental data.
doi: 10.1103/PhysRevC.104.024312
2021LA11 J.Phys.(London) G48, 095107 (2021) S.M.Lauber, H.C.Frye, C.W.Johnson Benchmarking angular-momentum projected Hartree-Fock as an approximation NUCLEAR STRUCTURE 20Ne, 25Mg, 29Na, 30Si, 30Al, 34Cl, 46Ti, 48V, 62,64Ni, 63Zn, 64Cu, 64,66,68,70,72,74,76,78Ge; analyzed available data; deduced HF energies, deformation parameters.
doi: 10.1088/1361-6471/ac1390
2021ZB01 J.Phys.(London) G48, 075102 (2021) R.Zbikowski, C.W.Johnson, A.E.McCoy, M.A.Caprio, P.J.Fasano Rotational bands beyond the Elliott model NUCLEAR STRUCTURE 7,8,9,10Be, 20Ne; analyzed available data; deduced energy levels, J, π, rotational bands using Eliott SU(3) model.
doi: 10.1088/1361-6471/abdd8e
2020FO04 Phys.Rev. C 101, 054308 (2020) J.M.R.Fox, C.W.Johnson, R.N.Perez Uncertainty quantification of an empirical shell-model interaction using principal component analysis NUCLEAR STRUCTURE 18F, 26Al, 26Mg; calculated B(E2) and B(M1) for several transitions; deduced median values and uncertainty intervals from comparison with experimental values. 17,18,19,20,21,22,23,24O, 18,19,20,21,22,23,24,25,26,27F, 20,21,22,23,24,25,26,27,28Ne, 22,23,24,25,26,27,28,29Na, 24,25,26,27,28,29,30Mg, 26,27,28,29,30,31,32,33Al, 28,29,30,31,32,33,34Si, 30,31,32,33,34,35P, 32,33,34,35,36S, 34,35,36,37Cl, 36,37,38Ar, 38,39K; calculated level energies, J, π; deduced uncertainties from comparison with experimental energies. Uncertainty quantification (UQ) in level energies, B(E2), B(M1) and B(GT) of a "gold-standard" empirical interaction for nuclear configuration-interaction shell model calculations in the sd-shell valence, investigating sensitivity of observables to perturbations in the 66 parameters. RADIOACTIVITY 26Ne, 32Si(β-); calculated B(GT), dark matter scattering on 36Ar coupling parameter; deduced uncertainty intervals for B(GT) from comparison with experimental values. Uncertainty quantification through shell-model calculations.
doi: 10.1103/PhysRevC.101.054308
2020JO02 Phys.Rev.Lett. 124, 172502 (2020) Unmixing Symmetries
doi: 10.1103/PhysRevLett.124.172502
2020JO07 J.Phys.(London) G47, 105107 (2020) Exact sum rules with approximate ground states NUCLEAR STRUCTURE 52,53,54,56Fe; analyzed available data; calculated M-scheme dimensions; deduced sum rules for E2 transitions in the sd shell nuclei.
doi: 10.1088/1361-6471/abacda
2019JI05 Phys.Rev. C 100, 031303(R) (2019) Union of rotational and vibrational modes in generator-coordinate-type calculations, with application to neutrinoless double-β decay NUCLEAR STRUCTURE 124Sn, 124,130Te, 130,136Xe, 136Ba; calculated energies of first 2+ and 4+ levels, g.s. energies, B(E2) for the first 2+ states. quasiparticle Tamm-Dancoff approximation (QTDA)-driven generator coordinate method (GCM). Comparison with experimental data, and with other theoretical calculations. RADIOACTIVITY 124Sn, 130Te, 136Xe(2β-); calculated nuclear matrix elements for 0νββ decay mode using QTDA-driven GCM with SVD Hamiltonian. Comparison with calculations using constrained Hartree-Fock-Bogoliubov (CHFB)-GCM, and configuration-interacting shell-model (SM).
doi: 10.1103/PhysRevC.100.031303
2019JO01 J.Phys.(London) G46, 015101 (2019) Convergence and efficiency of angular momentum projection NUCLEAR STRUCTURE 57Fe, 68Ga, 48Cr; calculated energy levels, minimum number of evaluations needed.
doi: 10.1088/1361-6471/aaee20
2019KR15 Eur.Phys.J. A 55, 225 (2019) M.K.G.Kruse, W.E.Ormand, C.W.Johnson No-core shell model calculations of the photonuclear cross section of 10B
doi: 10.1140/epja/i2019-12905-1
2018LU05 Phys.Rev. C 97, 034330 (2018) Transition sum rules in the shell model NUCLEAR STRUCTURE 34Cl, 10B, 21,27Ne; analyzed energy-weighted sum rules (EWSR) and transition strength function centroids as a function of initial energy for isoscalar E2 in 34Cl, for E1 in 10B, M1 in 21Ne and GT transitions for 27Ne; calculated ground-state E1 energy-weighted sum rule (EWSR) for Z=N nuclides. Z=11, 13, 15, 17, N=9-19; calculated centroids of E2 transitions from the ground state as a function of neutron number. Z=10, 12, 14, 16, N=10, 12, 14, 16, 18; calculated energies of the first 2+ states. Shell model occupation-space framework using the code PANDASCOMMUTE for non-energy weighted and energy-weighted sums rules of transition strength functions.
doi: 10.1103/PhysRevC.97.034330
2017HE06 Phys.Rev. C 95, 024303 (2017) Quasidynamical symmetries in the backbending of chromium isotopes NUCLEAR STRUCTURE 48,49,50Cr; calculated levels, J, decomposition of wave functions into total orbital angular momentum, total spin, and SU(3) and SU(4) irreducible representations (irreps); discussed backbending and quasidynamical symmetries. Group-theoretical decomposition using configuration-interaction shell-model wave functions from total orbital angular momentum, total spin, and the two-body Casimir operators of SU(3) and SU(4) groups.
doi: 10.1103/PhysRevC.95.024303
2017JO13 Phys.Rev. C 96, 064304 (2017) Projection of angular momentum via linear algebra NUCLEAR STRUCTURE 48Ca, 60Ni; calculated yrast excitation energies in the pf shell with semiphenomenological GXPF1A interaction, with full shell-model diagonalization, and using newly proposed method of projecting angular momentum with linear algebra. Comparison with experimental values.
doi: 10.1103/PhysRevC.96.064304
2016PH02 Phys.Rep. 612, 1 (2016) D.G.Phillips II, W.M.Snow, K.Babu, S.Banerjee, D.V.Baxter, Z.Berezhiani, M.Bergevin, S.Bhattacharya, G.Brooijmans, L.Castellanos, M.-C.Chen, C.E.Coppola, R.Cowsik, J.A.Crabtree, P.Das, E.B.Dees, A.Dolgov, P.D.Ferguson, M.Frost, T.Gabriel, A.Gal, F.Gallmeier, K.Ganezer, E.Golubeva, G.Greene, B.Hartfiel, A.Hawari, L.Heilbronn, C.Johnson, Y.Kamyshkov, B.Kerbikov, M.Kitaguchi, B.Z.Kopeliovich, V.B.Kopeliovich, V.A.Kuzmin, C-Y.Liu, P.McGaughey, M.Mocko, R.Mohapatra, N.Mokhov, G.Muhrer, H.P.Mumm, L.Okun, R.W.Pattie, Jr., C.Quigg, E.Ramberg, A.Ray, A.Roy, A.Ruggles, U.Sarkar, A.Saunders, A.P.Serebrov, H.M.Shimizu, R.Shrock, A.K.Sikdar, S.Sjue, S.Striganov, L.W.Townsend, R.Tschirhart, A.Vainshtein, R.Van Kooten, Z.Wang, A.R.Young Neutron-antineutron oscillations: Theoretical status and experimental prospects COMPILATION A=1; compiled experimental and theoretical information.
doi: 10.1016/j.physrep.2015.11.001
2015JO02 Phys.Rev. C 91, 034313 (2015) Spin-orbit decomposition of ab initio nuclear wave functions NUCLEAR STRUCTURE 9Be, 10,11B, 12C; calculated levels, J, π, decomposition of low-lying states in L- and S-components, rotational bands. Large-basis, no-core shell-model (NCSM) calculations using ab initio two-body interactions and L-S decomposition scheme. Comparison with predictions of phenomenological Cohen-Kurath forces. Discussed L-S decomposition as a useful tool for analyzing ab initio wave functions of light nuclei and rotational bands. Comparison with experimental data.
doi: 10.1103/PhysRevC.91.034313
2015JO07 Rom.J.Phys. 60, 772 (2015) Random Matrices, Point-Group Symmetries, and Many-Body Systems NUCLEAR STRUCTURE 46,50Ca; calculated rms nuclear matrix elements for different interactions. Comparison with available data.
2015SA24 Rom.J.Phys. 60, 799 (2015) M.Sambataro, N.Sandulescu, C.W.Johnson Proton-Neutron Pairing in Self-Conjugate Nuclei in a Formalism of Quartets NUCLEAR STRUCTURE 20Ne, 24Mg, 28Si, 32S, 44Ti, 48Cr, 52Fe, 104Te, 108Xe, 112Ba; calculated ground state correlation energies.
2015SA54 Phys.Lett. B 740, 137 (2015) M.Sambataro, N.Sandulescu, C.W.Johnson Isoscalar and isovector pairing in a formalism of quartets NUCLEAR STRUCTURE 16O, 40Ca, 100Sn, 20Ne, 24Mg, 28Si, 44Ti, 48Cr, 52Fe, 104Te, 108Xe, 112Ba; calculated ground state correlation energies for the isovector plus isoscalar pairing Hamiltonian in even-even N=Z nuclei in a formalism of alpha-like quartets. Comparison with available data.
doi: 10.1016/j.physletb.2014.11.036
2015SC12 Phys.Rev. C 92, 014320 (2015) M.D.Schuster, S.Quaglioni, C.W.Johnson, E.D.Jurgenson, P.Navratil Operator evolution for ab initio electric dipole transitions of 4He NUCLEAR REACTIONS 4He(γ, X), E>26 MeV; calculated total photoabsorption cross section, total dipole strength through renormalized matrix elements obtained in the framework of similarity renormalization (SRG) group method with NN+3N interactions. Comparison with experimental data. NUCLEAR STRUCTURE 4He; calculated ground-state energy, point-proton root-mean-square radius, total dipole strength, and electric dipole polarizability using NN+3N Hamiltonians. The ab initio no-core shell-model calculations. Comparison with experimental results.
doi: 10.1103/PhysRevC.92.014320
2014SC08 Phys.Rev. C 90, 011301 (2014) M.D.Schuster, S.Quaglioni, C.W.Johnson, E.D.Jurgenson, P.Navratil Operator evolution for ab initio theory of light nuclei NUCLEAR STRUCTURE 3H; calculated rms radius as a function of SRG evolution parameter. 4He; calculated ground-state energy, rms radius, and total strength of dipole transition, renormalization percent as a function of range of Gaussian operator. The ab initio calculations using similarity renormalization group (SRG). SRG-evolved operators in the two- and three-body spaces. Importance of three-body contribution at long range.
doi: 10.1103/PhysRevC.90.011301
2014SP01 Phys.Rev. C 90, 014315 (2014) Testing the spin-cutoff parametrization with shell-model calculations NUCLEAR STRUCTURE 11,12,13C, 14N, 16,17O, 20Ne, 22,23,24,25,26,27Na, 24,25,26,27,28,29Mg, 26,27,28,29,30Al, 28,29,30,31,32Si, 30,31,32,33P, 32,33,34S, 34,35Cl, 46,47,48,49,50,51,52Ca, 45,46,47,49Sc, 44,45,46,47Ti, 46V; calculated and analyzed level density parameter ρJ/ρ as function of spin and excitation energy. 12,13C, 14N, 17O, 20Ne, 24,26Mg, 26,27,28Al, 28Si, 34,35Cl, 48,49Ca, 45Sc, 44,45,46,47Ti, 46V; calculated spin-cutoff factors as function of excitation energy, in some cases for both positive and negative parities using semirealistic interactions in the interacting shell model. 22Na, 33S, 44Ti; calculated average J(J+1) as function of excitation energy using shell model and from inverting the thermal average.
doi: 10.1103/PhysRevC.90.014315
2013BO19 Comput.Phys.Commun. 184, 085101 (2013) S.Bogner, A.Bulgac, J.Carlson, J.Engel, G.Fann, R.J.Furnstahl, S.Gandolfi, G.Hagen, M.Horoi, C.Johnson, M.Kortelainen, E.Lusk, P.Maris, H.Nam, P.Navratil, W.Nazarewicz, E.Ng, G.P.A.Nobre, E.Ormand, T.Papenbrock, J.Pei, S.C.Pieper, S.Quaglioni, K.J.Roche, J.Sarich, N.Schunck, M.Sosonkina, J.Terasaki, I.Thompson, J.P.Vary, S.M.Wild Computational nuclear quantum many-body problem: The UNEDF project NUCLEAR REACTIONS 3He(d, p), 7Be(p, γ), E<1MeV; 172Yb, 188Os, 238U(γ, X), E<24 MeV; calculated σ. Comparison with experimental data. NUCLEAR STRUCTURE 100Zr; calculated quadrupole deformation parameter, radii, neutron separation energy.
doi: 10.1016/j.cpc.2013.05.020
2012SA24 Phys.Rev. C 85, 061303 (2012) N.Sandulescu, D.Negrea, J.Dukelsky, C.W.Johnson Quartet condensation and isovector pairing correlations in N=Z nuclei NUCLEAR STRUCTURE 20Ne, 24Mg, 28Si, 32S, 44Ti, 48Cr, 52Fe, 104Te, 108Xe, 112Ba; calculated correlation energies for the exact shell model diagonalizations (SM), quartet condensation model (QCM), and the two PBCS approximations using isovector pairing forces extracted from standard shell model interactions with spherical single-particle states, and isovector pairing force of seniority type with axially-deformed single-particle states.
doi: 10.1103/PhysRevC.85.061303
2012SA47 Phys.Rev. C 86, 041302 (2012) N.Sandulescu, D.Negrea, C.W.Johnson Four-nucleon α-type correlations and proton-neutron pairing away from the N=Z line NUCLEAR STRUCTURE 20,22,24,26,28,30Ne, 24,26,28,30,32Mg, 28,30,32Si, 44,46,48,50Ti, 48,50,52,54Cr, 104,106,108,110,112Te, 108,110,112,114Xe; calculated pairing correlation energies using exact diagonalization, the quartet condensation model (QCM), and the PBCS1 approximation. Importance of four-nucleon correlations of α type in systems with neutron-proton pairing.
doi: 10.1103/PhysRevC.86.041302
2010JO04 Phys.Rev. C 81, 054303 (2010) Sensitivity analysis of random two-body interactions
doi: 10.1103/PhysRevC.81.054303
2010JO05 Phys.Rev. C 82, 031303 (2010) Many-body fits of phase-equivalent effective interactions
doi: 10.1103/PhysRevC.82.031303
2009BE28 Phys.Rev. C 80, 027302 (2009) Model space truncation in shell-model fits
doi: 10.1103/PhysRevC.80.027302
2009JO04 Phys.Rev. C 80, 024320 (2009) Collapse of the random-phase approximation: Examples and counter-examples from the shell model NUCLEAR STRUCTURE 12C, 28Si, 32S; calculated ground-state energy, low-lying random phase approximation (RPA) frequencies of spherical and deformed states using shell model, Hartree-Fock (HF) and HF+RPA models.
doi: 10.1103/PhysRevC.80.024320
2007AL49 Phys.Atomic Nuclei 70, 1634 (2007) E.Algin, A.Schiller, A.Voinov, U.Agvaanluvsan, T.Belgya, L.A.Bernstein, C.R.Brune, R.Chankova, P.E.Garrett, S.M.Grimes, M.Guttormsen, M.Hjorth-Jensen, M.J.Hornish, C.W.Johnson, T.Massey, G.E.Mitchell, J.Rekstad, S.Siem, W.Younes Bulk properties of iron isotopes NUCLEAR REACTIONS 57Fe(3He, α), (3He, 3He'), E=45 MeV; 56Fe(n, γ), E=thermal; 55Mn(d, n), E=7.0 MeV; measured Eγ, Iγ. Deduced nuclear level densities and radiative strength functions. Compared results to model calculations.
doi: 10.1134/S1063778807090232
2007JO03 Phys.Rev. C 75, 047305 (2007) New puzzle for many-body systems with random two-body interactions NUCLEAR STRUCTURE Z=8-92; analyzed excited states energies, correlations.
doi: 10.1103/PhysRevC.75.047305
2007QU02 Nucl.Phys. A790, 372c (2007) S.Quaglioni, I.Stetcu, S.Bacca, B.R.Barrett, C.W.Johnson, P.Navratil, N.Barnea, W.Leidemann, G.Orlandini Benchmark calculation of inclusive responses in the four-body nuclear system NUCLEAR STRUCTURE 4He; calculated quadrupole response function. No-core shell model, effective interaction hyperspherical harmonic approach.
doi: 10.1016/j.nuclphysa.2007.03.068
2007ST05 Nucl.Phys. A785, 307 (2007) I.Stetcu, S.Quaglioni, S.Bacca, B.R.Barrett, C.W.Johnson, P.Navratil, N.Barnea, W.Leidemann, G.Orlandini Benchmark calculation of inclusive electromagnetic responses in the four-body nuclear system NUCLEAR STRUCTURE 4He; calculated ground-state energy, quadrupole and dipole response functions. No-core shell model, effective interaction hyperspherical harmonic approaches.
doi: 10.1016/j.nuclphysa.2006.12.047
2006TE01 Phys.Rev. C 73, 024303 (2006) Behavior of shell-model configuration moments NUCLEAR STRUCTURE 20Ne, 33Ar, 44Ti; calculated configuration widths and asymmetries, level density features.
doi: 10.1103/PhysRevC.73.024303
2006TE08 Phys.Rev.C 74, 067302 (2006) Simple models for shell-model configuration densities NUCLEAR STRUCTURE 24Ne, 22,23Na, 47V, 46,49Ca; calculated level densities, configuration densities. Several models compared.
doi: 10.1103/PhysRevC.74.067302
2005JO05 Int.J.Mod.Phys. E14, 57 (2005) Shortcuts to nuclear structure: Lessons in Hartree-Fock, RPA, and the no-core shell model NUCLEAR STRUCTURE 12C; calculated ground-state energy. No-core shell model.
doi: 10.1142/S0218301305002771
2005ST11 Int.J.Mod.Phys. E14, 95 (2005) I.Stetcu, B.R.Barrett, P.Navratil, C.W.Johnson Electromagnetic transitions with effective operators NUCLEAR STRUCTURE 2H, 6Li; calculated transitions B(E2), B(M1). Effective operators.
doi: 10.1142/S0218301305002813
2005TE07 Eur.Phys.J. A 25, Supplement 1, 673 (2005) A statistical spectroscopy approach for calculating nuclear level densities NUCLEAR STRUCTURE 20,21Ne, 34Ar, 34Cl; calculated level densities. Statistical spectroscopy approach.
doi: 10.1140/epjad/i2005-06-081-5
2004ST04 Phys.Rev. C 69, 024311 (2004) Gamow-Teller transitions and deformation in the proton-neutron random phase approximation NUCLEAR STRUCTURE 20,21,22,24Ne, 24,25Na, 24,26Mg, 26,27,29Al, 28,30Si, 32,34S, 36Ar, 44,46Ti; calculated Gamow-Teller transition strengths. Proton-neutron RPA.
doi: 10.1103/PhysRevC.69.024311
2003SC32 Phys.Rev. C 68, 054326 (2003) A.Schiller, E.Algin, L.A.Bernstein, P.E.Garrett, M.Guttormsen, M.Hjorth-Jensen, C.W.Johnson, G.E.Mitchell, J.Rekstad, S.Siem, A.Voinov, W.Younes Level densities in 56, 57Fe and 96, 97Mo NUCLEAR REACTIONS 57Fe, 97Mo(3He, 3He'), (3He, α), E=45 MeV; measured particle spectra, Eγ, Iγ. 56,57Fe, 96,97Mo deduced level densities. Microscopic model, pairing plus random interaction.
doi: 10.1103/PhysRevC.68.054326
2003ST04 Phys.Rev. C 67, 044315 (2003) Tests of the random phase approximation for transition strengths NUCLEAR STRUCTURE 20,21,22Ne, 22,24Na, 24,25Mg, 28,29Si, 36Ar, 44Ti, 46V; calculated transition strength distributions. Comparison of RPA and shell model results.
doi: 10.1103/PhysRevC.67.044315
2002GU05 Phys.Rev. C65, 024314 (2002) V.G.Gueorguiev, W.E.Ormand, C.W.Johnson, J.P.Draayer Mixed-Mode Shell-Model Theory for Nuclear Structure Studies NUCLEAR STRUCTURE 24Mg; calculated binding energy, level energies. Mixed-mode shell model approach.
doi: 10.1103/PhysRevC.65.024314
2002JO13 Nucl.Phys. A704, 276c (2002) Pairing from Random Interactions
doi: 10.1016/S0375-9474(02)00787-X
2002JO15 Phys.Rev. C66, 034312 (2002) C.W.Johnson, I.Stetcu, J.P.Draayer SU(3) versus Deformed Hartree-Fock State NUCLEAR STRUCTURE 20Ne, 24Mg, 32S, 36Ar, 44Ti; calculated ground-state energies, deformation parameters. Comparison of Hartree-Fock and SU(3) models.
doi: 10.1103/PhysRevC.66.034312
2002JO21 Phys.Rev. C 66, 064304 (2002) Scalar ground-state observables in the random phase approximation NUCLEAR STRUCTURE 20,22,24O, 19,20,21F, 20,21,22Ne, 22,23Na, 24,25,26Mg, 26Al, 28Si, 44,46Ti, 46V, 48Cr; calculated expectation values for pairing, spin, other observables. RPA, quasiboson approximation. Comparison with mean-field results.
doi: 10.1103/PhysRevC.66.064304
2002ST29 Phys.Rev. C66, 034301 (2002) Random Phase Approximation vs Exact Shell-Model Correlation Energies NUCLEAR STRUCTURE 19,20,21,22,23,24O, 19,20,21,22,23,27F, 20,21,22,23,24,28Ne, 22,23,24,25,29Na, 24,25,26,27Mg, 26,27,28Al, 28,29Si, 30,31,32,33,34P, 27,32,33,34S, 34,35Cl, 36,37Ar, 36K, 44,45,46,47,48,49,50Ca, 43,44,45,46,47Sc, 44,45,46,47Ti, 46V, 48Cr; calculated binding energies, correlation energies. Comparison of RPA and exact shell-model results.
doi: 10.1103/PhysRevC.66.034301
2001GU04 Phys.Rev. C63, 014318 (2001) V.G.Gueorguiev, J.P.Draayer, C.W.Johnson SU(3) Symmetry Breaking in Lower fp-Shell Nuclei NUCLEAR STRUCTURE 44,46,48Ti, 48Cr; calculated transitions B(E2), role of SU(3) symmetry breaking.
doi: 10.1103/PhysRevC.63.014318
2001KA02 Phys.Rev. C63, 014307 (2001) L.Kaplan, T.Papenbrock, C.W.Johnson Spin Structure of Many-Body Systems with Two-Body Random Interactions
doi: 10.1103/PhysRevC.63.014307
2000JO01 Phys.Rev. C61, 014311 (2000) C.W.Johnson, G.F.Bertsch, D.J.Dean, I.Talmi Generalized Seniority from Random Hamiltonians NUCLEAR STRUCTURE 20,22,24O, 24,26,28Mg, 44,46,48Ca; calculated pairing features, fractional pair-transfer collectivity. Random two-body matrix elements.
doi: 10.1103/PhysRevC.61.014311
2000JO06 Phys.Rev. C61, 044327 (2000) Sum Rules Regarding the Sign Problem in Monte Carlo Shell Model Calculations
doi: 10.1103/PhysRevC.61.044327
1999JO15 Int.J.Mod.Phys. E8, 355 (1999) Nucleon Electromagnetic Form Factors and Chiral Singularities
doi: 10.1142/S0218301399000264
1998AD12 Rev.Mod.Phys. 70, 1265 (1998) E.G.Adelberger, S.M.Austin, J.B.Bahcall, A.B.Balantekin, G.Bogaert, L.S.Brown, L.Buchmann, F.E.Cecil, A.E.Champagne, L.de Braeckeleer, C.A.Duba, S.R.Elliott, S.J.Freedom, M.Gai, G.Goldring, C.R.Gould, A.Gruzinov, W.C.Haxton, K.M.Heeger, E.Henley, C.W.Johnson, M.Kamionkowski, R.W.Kavanagh, S.E.Koonin, K.Kubodera, K.Langanke, T.Motobayashi, V.Pandharipande, P.Parker, R.G.H.Robertson, C.Rolfs, R.F.Sawyer, N.Shaviv, T.D.Shoppa, K.A.Snover, E.Swanson, R.E.Tribble, S.Turck-Chieze, J.F.Wilkerson Solar Fusion Cross Sections NUCLEAR REACTIONS 7Be, 12,13C, 15N, 16,17,18O(p, γ), 14,15N, 17,18O(p, α), 7Li(d, p), 3He(p, e+), (α, γ), (3He, 2p), 1H(p, e+), E=low; compiled, analyzed S-factor data, calculations; deduced implications for solar neutrino flux calculations.
doi: 10.1103/RevModPhys.70.1265
1998JO04 Phys.Rev.Lett. 80, 2749 (1998) C.W.Johnson, G.F.Bertsch, D.J.Dean Orderly Spectra from Random Interactions
doi: 10.1103/PhysRevLett.80.2749
1998JO19 Acta Phys.Hung.N.S. 8, 343 (1998) Saturation Properties of Nuclear Matter with Nonlocal Confining Solitons
1997JO19 Phys.Rev. C56, 3353 (1997) High-Density Nuclear Matter with Nonlocal Confining Solitons
doi: 10.1103/PhysRevC.56.3353
1996JO18 Phys.Lett. 386B, 75 (1996) The Hadron-Quark Transition with a Lattice of Nonlocal Confining Solitons
doi: 10.1016/0370-2693(96)00936-7
1995GI03 Phys.Rev. C51, 1861 (1995) Unified Theory of Fermion Pair to Boson Mappings in Full and Truncated Spaces
doi: 10.1103/PhysRevC.51.1861
1994JO06 Phys.Rev. C50, R571 (1994) Hermitian Boson Mapping and Finite Truncation
doi: 10.1103/PhysRevC.50.R571
1994OR01 Phys.Rev. C49, 1422 (1994) W.E.Ormand, D.J.Dean, C.W.Johnson, G.H.Lang, S.E.Koonin Demonstration of the Auxiliary-Field Monte Carlo Approach for sd-Shell Nuclei NUCLEAR STRUCTURE 20,22,24,26Ne, 22Na; calculated energy, quadrupole moment, other operators expectation value. 22Ne; calculated response functions; deduced shape features. Auxiliary-field Monte Carlo approach.
doi: 10.1103/PhysRevC.49.1422
1993LA24 Phys.Rev. C48, 1518 (1993) G.H.Lang, C.W.Johnson, S.E.Koonin, W.E.Ormand Monte Carlo Evaluation of Path Integrals for the Nuclear Shell Model NUCLEAR STRUCTURE 24Mg, 20Ne; calculated <H>, <J2> vs deformation parameter. Shell model, Monte Carlo evaluation of path integrals.
doi: 10.1103/PhysRevC.48.1518
1992JO07 Phys.Rev.Lett. 69, 3157 (1992) C.W.Johnson, S.E.Koonin, G.H.Lang, W.E.Ormand Monte Carlo Methods for the Nuclear Shell Model NUCLEAR STRUCTURE 24Mg, 20Ne, 48Cr; calculated ground state, thermal few body operators expectation values.
doi: 10.1103/PhysRevLett.69.3157
1992KO11 Phys.Rev.Lett. 69, 1163 (1992) S.E.Koonin, C.W.Johnson, P.Vogel Optical Model Description of Parity-Nonconserving Neutron Resonances NUCLEAR REACTIONS 238U, 232Th, 117Sn, 81Br, 111Cd, 139La(polarized n, n), E ≈ resonance; calculated parity nonconserving coupling constant parameter. Optical model.
doi: 10.1103/PhysRevLett.69.1163
1991JO08 Phys.Rev. C44, 657 (1991) C.H.Johnson, R.F.Carlton, R.R.Winters Evidence for Parity Dependence in the Neutron-40Ar Optical Model Potential NUCLEAR REACTIONS 40Ar(n, n), E < 40 MeV; analyzed data; deduced model parameters, potential parity dependence. Dispersive optical model.
doi: 10.1103/PhysRevC.44.657
1991WI02 Phys.Rev. C43, 492 (1991) R.R.Winters, R.F.Carlton, C.H.Johnson, N.W.Hill, M.R.Lacerna Total Cross Section and Neutron Resonance Spectroscopy for n + 40Ar NUCLEAR REACTIONS 40Ar(n, n), E=0.007-50 MeV; measured σ(E). 41Ar deduced resonances, J, π, (gΓn), reduced widths, strength functions. R-matrix analysis.
doi: 10.1103/PhysRevC.43.492
1989JO01 Phys.Rev. C39, 415 (1989) C.H.Johnson, R.F.Carlton, R.R.Winters Extrapolation of the Dispersive Optical Model to the Resonance Region for Neutrons on 86Kr NUCLEAR REACTIONS 86Kr(n, n), E ≤ 1 MeV; analyzed σ(E); deduced optical model parameter.
doi: 10.1103/PhysRevC.39.415
1988CA17 Phys.Rev. C38, 1605 (1988); Erratum Phys.Rev. C39, 1646 (1989) R.F.Carlton, R.R.Winters, C.H.Johnson, N.W.Hill, J.A.Harvey Total Cross Section and Resonance Spectroscopy for n + 86Kr NUCLEAR REACTIONS 86Kr(n, X), E=0.015-1 MeV; measured transmission; deduced σ(E). 87Kr deduced resonances, L, J, (gΓn), (g(γ(λn))2).
doi: 10.1103/PhysRevC.38.1605
1988JE03 Phys.Rev. C38, 2573 (1988) J.-P.Jeukenne, C.H.Johnson, C.Mahaux Surface Contributions to the Complex Neutron-208Pb Mean Field between -20 and +20 MeV NUCLEAR REACTIONS 208Pb(n, n), E=7-14 MeV; analyzed data; model parameters. Local optical model.
doi: 10.1103/PhysRevC.38.2573
1988JO05 Phys.Rev. C37, 2340 (1988) Evidence for State Dependence of the Imaginary Part of the Empirical Optical Potential NUCLEAR REACTIONS 208Pb(n, n), E=10 MeV; 89Y(n, n), E=5 MeV; calculated optical potential; deduced imaginary term shape dependence.
doi: 10.1103/PhysRevC.37.2340
1988JO07 Phys.Rev. C38, 2589 (1988) Neutron-40Ca Mean Field between -80 and +80 MeV from a Dispersive Optical-Model Analysis NUCLEAR REACTIONS 40Ca(n, n), E=5.3-40 MeV; analyzed data; deduced model parameters. Dispersive optical model analysis.
doi: 10.1103/PhysRevC.38.2589
1987CA11 Nucl.Phys. A465, 274 (1987) R.F.Carlton, J.A.Harvey, R.L.Macklin, C.H.Johnson, B.Castel Nuclear Structure of 49Ca above 5 MeV Excitation from n + 48Ca and Astrophysics for 30 keV Neutrons NUCLEAR REACTIONS 48Ca(n, n), (n, γ), (n, X), E < 2 MeV; measured total, capture σ(E), transmission. 49Ca deduced levels, J, π, (gΓnGγ/Γ), Γn, Γγ. R-matrix formalism.
doi: 10.1016/0375-9474(87)90435-0
1987JO04 Phys.Rev. C36, 2252 (1987) C.H.Johnson, D.J.Horen, C.Mahaux Unified Description of the Neutron-208Pb Mean Field between - 20 and + 165 MeV from the Dispersion Relation Constraint NUCLEAR REACTIONS 208Pb(n, n), (polarized n, n), E=1-25 MeV; measured σ(θ), analyzing power vs θ, σ(E). 208Pb deduced single particle densities, spectroscopic factors, rms radii, occupation numbers. Unified model, dispersion relation constraint.
doi: 10.1103/PhysRevC.36.2252
1986HO19 Phys.Rev. C34, 429 (1986) D.J.Horen, C.H.Johnson, J.L.Fowler, A.D.MacKellar, B.Castel 208Pb + n Reaction and the Mean Nuclear Field near Threshold NUCLEAR REACTIONS 208Pb(n, X), 208Pb(n, n), E=50-1005 keV; measured transmission, σ(E), σ(θ); deduced model parameters. 209Pb deduced resonances, J, π, Γn, neutron reduced width, strength function. Optical model, R-matrix analysis.
doi: 10.1103/PhysRevC.34.429
1985HA24 Phys.Rev. C32, 1114 (1985) J.A.Harvey, C.H.Johnson, R.F.Carlton, B.Castel Single-Particle 2d5/2 Strength in the 48Ca + n Reaction NUCLEAR REACTIONS 48Ca(n, n), E=0.01-2 MeV; measured σ(E). 49Ca deduced resonances, reduced widths, single particle strength fraction. R-matrix analysis.
doi: 10.1103/PhysRevC.32.1114
1985HO23 Phys.Lett. 161B, 217 (1985) D.J.Horen, C.H.Johnson, A.D.Mackellar lJ-Dependence of the Real Optical Potential near Neutron Threshold NUCLEAR REACTIONS 208Pb(n, X), (n, n), E=0.05-1.005 MeV; measured transmission, σ(θ). 208Pb(n, n), E=4, 7 MeV; analyzed σ(θ); deduced optical model parameters, l-, j-dependences.
doi: 10.1016/0370-2693(85)90748-8
1985PR04 Phys.Rev. A32, 2712 (1985) J.D.Prestage, C.E.Johnson, E.A.Hinds, F.M.J.Pichanick Precise Study of Hyperfine Structure in the 23P State of 3He NUCLEAR MOMENTS 3He; measured hfs. High precision, optical microwave ABMR technique.
doi: 10.1103/PhysRevA.32.2712
1985WI02 Phys.Rev. C31, 384 (1985) R.R.Winters, C.H.Johnson, A.D.MacKellar Optical Model for Low-Energy Neutrons on 60Ni NUCLEAR REACTIONS 60Ni(n, n), E=1-450 keV; analyzed σ(E); deduced optical model parameters.
doi: 10.1103/PhysRevC.31.384
1984CA15 Phys.Rev. C29, 1988 (1984) R.F.Carlton, J.A.Harvey, C.H.Johnson s- and p-Wave Neutrons on 30Si and 34S: Spherical optical model analysis. NUCLEAR REACTIONS 30Si, 34S(n, n), E=0-1.4 MeV; analyzed s-, p-wave strength function data; deduced optical model parameters. Analytic approximation method.
doi: 10.1103/PhysRevC.29.1988
1983DA07 Nucl.Sci.Eng. 83, 22 (1983) J.W.T.Dabbs, C.H.Johnson, C.E.Bemis, Jr. Measurement of the 241Am Neutron Fission Cross Section NUCLEAR REACTIONS 241Am(n, F), E=0.00002-20 MeV; measured fission σ(E); deduced fission resonance integral.
doi: 10.13182/NSE83-A17986
1983JO01 Phys.Rev. C27, 416 (1983) Average Scattering Matrix Elements from High Resolution Neutron Total Cross Sections for 32S NUCLEAR REACTIONS 32S(n, n), E=25-1100 keV; analyzed data; deduced s-, p-wave optical model parameters.
doi: 10.1103/PhysRevC.27.416
1983JO07 Phys.Rev. C27, 1913 (1983) C.H.Johnson, N.M.Larson, C.Mahaux, R.R.Winters Calculation of the Energy-Averaged Scattering Function from High Resolution Low-Energy Neutron Scattering Data NUCLEAR REACTIONS 32S(n, n), E ≈ 0.2-0.9 MeV; calculated σ(compound nucleus), σ(shape elastic) vs E. Optical model scattering function, energy averaging, p-wave neutrons.
doi: 10.1103/PhysRevC.27.1913
1980HA04 Phys.Rev. C21, 545 (1980) J.Halperin, C.H.Johnson, R.R.Winters, R.L.Macklin Resonance Structure of 32S + n from Measurements of Neutron Total and Capture Cross Sections NUCLEAR REACTIONS 32S(n, n), E=25-1100 keV; 32S(n, γ), E=2.5-1100 keV; measured total σ(E). 33S deduced resonances, L, J, π, Γn, Γγ, resonance parameters. Valency model.
doi: 10.1103/PhysRevC.21.545
1980HE03 Phys.Rev. C21, 896 (1980) R.L.Hershberger, D.S.Flynn, F.Gabbard, C.H.Johnson Systematics of Proton Absorption Deduced from (p, p) and (p, n) Cross Sections for 2.0- to 6.7-MeV Protons on 107,109Ag and 115In NUCLEAR REACTIONS 107,109Ag, 115In(p, p), (p, n), E=2-6.7 MeV; measured σ(θp), total σ(p, n); deduced model parameters. Statistical, optical model analyses.
doi: 10.1103/PhysRevC.21.896
1980JO04 Phys.Rev. C21, 2190 (1980) Neutron Total Cross Section of Sulfur: Single Level to Multilevel to Optical Model NUCLEAR REACTIONS 32S(n, n), E=25-1100 keV; analyzed total σ(E); deduced optical model parameters. 33S deduced resonances, J, π, s-, p-strength functions. Single-, multilevel R-matrix, optical model analyses.
doi: 10.1103/PhysRevC.21.2190
1979JO09 Phys.Rev. C20, 2052 (1979) C.H.Johnson, A.Galonsky, R.L.Kernell (p, n) Reaction for 89 < A < 130 and an Anomalous Optical Model Potential for Sub-Coulomb Protons NUCLEAR REACTIONS 105,106,108,110Pd, 107,109Ag, 111,112,113,114,116Cd, 125,126,128,130Te, 89Y, 93Nb, 103Rh(p, n), E=2.5-5.8 MeV; measured σ; deduced optical model parameters. Enriched targets. Pd, Ag, Cd, In, Te(p, n), E=2.5-5.8 MeV; measured σ; deduced optical model parameters. Natural targets.
doi: 10.1103/PhysRevC.20.2052
1977JO01 Phys.Rev. C15, 196 (1977) C.H.Johnson, J.K.Bair, C.M.Jones, S.K.Penny, D.W.Smith p-Wave Size Resonances Observed by the (p, n) Reaction for 2.6- to 7-MeV Protons Incident on Isotopes of Sn NUCLEAR REACTIONS 117,118,119,120,122,124Sn(p, n), E=2.6-7 MeV; measured total σ, σ(E). 118,119,120,121,123,125Sb deduced resonances. Statistical, optical model analysis.
doi: 10.1103/PhysRevC.15.196
1977JO03 Phys.Rev. C15, 915 (1977) C.H.Johnson, J.K.Bair, C.M.Jones Thresholds for 116Sn(p, n) and 118Sn(p, n) NUCLEAR REACTIONS 116,118Sn(p, n), E ≈ threshold; measured thick target integrated σ; deduced Q.
doi: 10.1103/PhysRevC.15.915
1977JO11 Phys.Rev.Lett. 39, 1604 (1977) C.H.Johnson, A.Galonsky, R.L.Kernell Anomalous Optical-Model Potential for Sub-Coulomb Protons for 89 < A < 130 NUCLEAR REACTIONS 89Y, In, 93Nb, 103Rh, 105,110Pd, 107,109Ag, 111,113,114,116Cd, 128,130Te(p, n), E=2.5-5.8 MeV; measured nothing, reanalyzed data, absolute σ.
doi: 10.1103/PhysRevLett.39.1604
1976RO15 Phys.Rev. C14, 2126 (1976) R.L.Robinson, J.K.Bair, C.H.Johnson, P.H.Stelson, W.B.Dress, C.M.Jones Cross Sections for the Ni, Cu, Zn(16,18O, xn) Reactions Near the Coulomb Barrier NUCLEAR REACTIONS 58,60,61,62,64Ni, 63,65Cu, 64,66,67,68,70Zn(16O, xn), (18O, xn), E=36-55 MeV; measured total σ(E).
doi: 10.1103/PhysRevC.14.2126
1975RO13 J.Phys.(London) C8, 1301 (1975) E.D.Roberts, P.Weightman, C.E.Johnson Photoelectron and L2, 3 MM Auger Electron Energies for Arsenic ATOMIC PHYSICS As; measured photoelectron, L, M Auger spectra.
doi: 10.1088/0022-3719/8/8/032
1975RO21 J.Phys.(London) C8, 2336 (1975) E.D.Roberts, P.Weightman, C.E.Johnson Transition Probabilities for the L2, 3 MM Auger Spectrum of Selenium ATOMIC PHYSICS Se; calculated Auger transition rates.
doi: 10.1088/0022-3719/8/14/016
1975RO22 J.Phys.(London) C8, L301 (1975) E.D.Roberts, P.Weightman, C.E.Johnson Auger Vacancy Satellite Structure in the L3M4, 5M4, 5 Auger Spectra Of Copper ATOMIC PHYSICS Cu; measured Auger spectra.
doi: 10.1088/0022-3719/8/13/006
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