NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = G.Hagen Found 106 matches. Showing 1 to 100. [Next]2024SO05 Phys.Rev. C 109, 025502 (2024) J.E.Sobczyk, B.Acharya, S.Bacca, G.Hagen 40Ca transverse response function from coupled-cluster theory
doi: 10.1103/PhysRevC.109.025502
2023CH26 Phys.Lett. B 843, 138025 (2023) S.Chen, F.Browne, P.Doornenbal, J.Lee, A.Obertelli, Y.Tsunoda, T.Otsuka, Y.Chazono, G.Hagen, J.D.Holt, G.R.Jansen, K.Ogata, N.Shimizu, Y.Utsuno, K.Yoshida, N.L.Achouri, H.Baba, D.Calvet, F.Chateau, N.Chiga, A.Corsi, M.L.Cortes, A.Delbart, J.-M.Gheller, A.Giganon, A.Gillibert, C.Hilaire, T.Isobe, T.Kobayashi, Y.Kubota, V.Lapoux, H.N.Liu, T.Motobayashi, I.Murray, H.Otsu, V.Panin, N.Paul, W.Rodriguez, H.Sakurai, M.Sasano, D.Steppenbeck, L.Stuhl, Y.L.Sun, Y.Togano, T.Uesaka, K.Wimmer, K.Yoneda, O.Aktas, T.Aumann, L.X.Chung, F.Flavigny, S.Franchoo, I.Gasparic, R.-B.Gerst, J.Gibelin, K.I.Hahn, D.Kim, T.Koiwai, Y.Kondo, P.Koseoglou, C.Lehr, B.D.Linh, T.Lokotko, M.MacCormick, K.Moschner, T.Nakamura, S.Y.Park, D.Rossi, E.Sahin, P.-A.Soderstrom, D.Sohler, S.Takeuchi, H.Tornqvist, V.Vaquero, V.Wagner, S.Wang, V.Werner, X.Xu, H.Yamada, D.Yan, Z.Yang, M.Yasuda, L.Zanetti Level structures of 56, 58Ca cast doubt on a doubly magic 60Ca NUCLEAR REACTIONS 1H(57Sc, 2p)56Ca, E=209 MeV/nucleon; 1H(59Sc, 2p)58Ca, E=199 MeV/nucleon, [57,59Sc secondary beams from 9Be(70Zn, X), E=345 MeV/nucleon, followed by separation and identification of ions of interest using the BigRIPS separator at RIBF-RIKEN facility]; measured reaction residues of 56Ca and 58Ca through identification by the SAMURAI spectrometer, Doppler-corrected Eγ, Iγ, (particle)γ-coin using the DALI2+ array using MINOS liquid hydrogen target. 56,58Ca; deduced energies of the first 2+ levels. Comparison with shell-model calculations with the GXPF1B Hamiltonian in full pf model space, and the state-of-the-art ab initio approaches: VS-IMSRG method, and CC calculations. Systematics of energies of the first 2+ states and S(2n) from experiment (N=22-36) and theory in N=22-54 Ca isotopes.
doi: 10.1016/j.physletb.2023.138025
2023FE08 Phys. Rev. Res. 5, L022044 (2023) R.W.Fearick, P.von Neumann-Cosel, S.Bacca, J.Birkhan, F.Bonaiti, I.Brandherm, G.Hagen, H.Matsubara, W.Nazarewicz, N.Pietralla, V.Yu.Ponomarev, P.-G.Reinhard, X.Roca-Maza, A.Richter, A.Schwenk, J.Simonis, and A.Tamii Electric dipole polarizability of 40Ca NUCLEAR REACTIONS 40Ca(p, p'), E=5-25 MeV; measured reaction products, Ep, Ip; deduced electric dipole strength distribution, σ(θ, E). Comparison with available data. The Grand Raiden spectrometer, RCNP, Osaka.
doi: 10.1103/PhysRevResearch.5.L022044
2023GI06 Phys.Rev.Lett. 130, 232301 (2023) S.Giraud, J.C.Zamora, R.G.T.Zegers, D.Bazin, Y.Ayyad, S.Bacca, S.Beceiro Novo, B.A.Brown, A.Carls, J.Chen, M.Cortesi, M.DeNudt, G.Hagen, C.Hultquist, C.Maher, W.Mittig, F.Ndayisabye, S.Noji, S.J.Novario, J.Pereira, Z.Rahman, J.Schmitt, M.Serikow, L.J.Sun, J.Surbrook, N.Watwood, T.Wheeler β+ Gamow-Teller Strengths from Unstable 14O via the (d, 2He) Reaction in Inverse Kinematics NUCLEAR REACTIONS 2H(14O, 2He), E=105 MeV/nucleon; measured reaction products. 14O; deduced σ(θ), B(GT) or Gamow-Teller transition strength. Comparison with available data. The Coupled Cyclotron Facility at the National Superconducting Cyclotron Laboratory (NSCL), MSU.
doi: 10.1103/PhysRevLett.130.232301
2023GU20 Phys.Rev. C 108, 054309 (2023) C.Gu, Z.H.Sun, G.Hagen, T.Papenbrock Entanglement entropy of nuclear systems
doi: 10.1103/PhysRevC.108.054309
2023KO15 Nature(London) 620, 965 (2023) Y.Kondo, N.L.Achouri, H.Al Falou, L.Atar, T.Aumann, H.Baba, K.Boretzky, C.Caesar, D.Calvet, H.Chae, N.Chiga, A.Corsi, F.Delaunay, A.Delbart, Q.Deshayes, Zs.Dombradi, C.A.Douma, A.Ekstrom, Z.Elekes, C.Forssen, I.Gasparic, J.-M.Gheller, J.Gibelin, A.Gillibert, G.Hagen, M.N.Harakeh, A.Hirayama, C.R.Hoffman, M.Holl, A.Horvat, A.Horvath, J.W.Hwang, T.Isobe, W.G.Jiang, J.Kahlbow, N.Kalantar-Nayestanaki, S.Kawase, S.Kim, K.Kisamori, T.Kobayashi, D.Korper, S.Koyama, I.Kuti, V.Lapoux, S.Lindberg, F.M.Marques, S.Masuoka, J.Mayer, K.Miki, T.Murakami, M.Najafi, T.Nakamura, K.Nakano, N.Nakatsuka, T.Nilsson, A.Obertelli, K.Ogata, F.de Oliveira Santos, N.A.Orr, H.Otsu, T.Otsuka, T.Ozaki, V.Panin, T.Papenbrock, S.Paschalis, A.Revel, D.Rossi, A.T.Saito, T.Y.Saito, M.Sasano, H.Sato, Y.Satou, H.Scheit, F.Schindler, P.Schrock, M.Shikata, N.Shimizu, Y.Shimizu, H.Simon, D.Sohler, O.Sorlin, L.Stuhl, Z.H.Sun, S.Takeuchi, M.Tanaka, M.Thoennessen, H.Tornqvist, Y.Togano, T.Tomai, J.Tscheuschner, J.Tsubota, N.Tsunoda, T.Uesaka, Y.Utsuno, I.Vernon, H.Wang, Z.Yang, M.Yasuda, K.Yoneda, S.Yoshida First observation of 28O NUCLEAR REACTIONS H(29F, X)27O/28O, E=235 MeV/nucleon; measured reaction products; deduced yields. The hydrogen target was surrounded by the MINOS Time Projection Chamber, SAMURAI spectrometer, RIKEN RI Beam Factory. RADIOACTIVITY 28O(4n), 27O(3n); measured decay products, En, In; deduced decay energy spectra and schemes from the measured momenta using the invariant-mass technique, resonance parameters. Comparison with the large-scale shell-model calculations using the new chiral effective field theory (EEdf3) interaction.
doi: 10.1038/s41586-023-06352-6
2023KO19 Phys.Rev.Lett. 131, 102501 (2023) K.Konig, S.Fritzsche, G.Hagen, J.D.Holt, A.Klose, J.Lantis, Y.Liu, K.Minamisono, T.Miyagi, W.Nazarewicz, T.Papenbrock, S.V.Pineda, R.Powel, P.-G.Reinhard Surprising Charge-Radius Kink in the Sc Isotopes at N=20 NUCLEAR REACTIONS Be(40Ca, X)40Sc/41Sc, E=140 MeV/nucleon; measured frequencies; deduced resonance spectra, charge radii using collinear laser spectroscopy, kink at neutron shell closure. Comparison with available data. The National Superconducting Cyclotron Laboratory.
doi: 10.1103/PhysRevLett.131.102501
2023NO01 Phys.Rev.Lett. 130, 032501 (2023) S.J.Novario, D.Lonardoni, S.Gandolfi, G.Hagen Trends of Neutron Skins and Radii of Mirror Nuclei from First Principles NUCLEAR STRUCTURE 42,46,48Ca, 48Ti, 48Cr; calculated neutron skin thickness, mirror-difference binding energy per nucleon using dN2LOGO (394) with and without the Coulomb term.
doi: 10.1103/PhysRevLett.130.032501
2023SU07 Phys.Rev. C 108, 014307 (2023) Z.H.Sun, G.Hagen, T.Papenbrock Coupled-cluster theory for strong entanglement in nuclei NUCLEAR STRUCTURE 12C, 28Si, 56Ni; calculated ground-state energy. Single-reference coupled-cluster theory based on spherical and deformed reference states and the tailored coupled-cluster method. Comparison to experimental data.
doi: 10.1103/PhysRevC.108.014307
2023YA29 Eur.Phys.J. A 59, 233 (2023) C.-J.Yang, A.Ekstrom, C.Forssen, G.Hagen, G.Rupak, U.van Kolck The importance of few-nucleon forces in chiral effective field theory NUCLEAR STRUCTURE 3H, 4He, 16O, 40Ca; calculated binding energy per nucleon with NN-only and NN+NNN interactions at leading order (LO) with coupled-cluster model of the equation of state for symmetric nuclear matter; deduced LO four-nucleon forces could play a crucial role for describing heavy-mass nuclei.
doi: 10.1140/epja/s10050-023-01149-7
2022BO02 Phys.Rev. C 105, 034313 (2022) Ab initio coupled-cluster calculations of ground and dipole excited states in 8He NUCLEAR STRUCTURE 8He; calculated ground-state energy, point-proton radius, dipole response function, dipole polarizability. Coupled-cluster calculations with the inclusion of leading-order three-particle three-hole excitations in the cluster operator. Comparison to experimental data.
doi: 10.1103/PhysRevC.105.034313
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
2022HA19 Phys.Rev. C 105, 064311 (2022) G.Hagen, S.J.Novario, Z.H.Sun, T.Papenbrock, G.R.Jansen, J.G.Lietz, T.Duguet, A.Tichai Angular-momentum projection in coupled-cluster theory: Structure of 34Mg NUCLEAR STRUCTURE 8Be; calculated energies using symmetry-unrestricted Hartree-Fock and HF-RVAP as a function of the mass quadrupole moment q20. 20Ne, 34Mg; calculated the norm kernels and Hamiltonian kernels as function of the rotation angle using Hartree-Fock and CCD theories. 8Be, 20Ne, 34Mg; calculated projected coupled-cluster energies of the ground and excited states as a function of oscillator frequency using CCD, SLD, and SQD approximations. 44,46,48Ti, 48,50Cr; calculated low-lying states of J=0, 2 and 4 using projection-after-variation Hartree-Fock (PAV HF), variation-after-projection Hartree-Fock (VAP-HF), and projected CCD, SLD, and SQD methods, and compared to FCI results. Angular-momentum projection after variation with the disentangled coupled-cluster formalism and a Hermitian approach. Comparison with two-nucleon interaction from chiral effective field theory and for pf-shell nuclei within the traditional shell model, and with experimental data.
doi: 10.1103/PhysRevC.105.064311
2022HU13 Nat.Phys. 610, 1196 (2022) B.Hu, W.Jiang, T.Miyagi, Z.Sun, A.Ekstrom, C.Forssen, G.Hagen, J.D.Holt, T.Papenbrock, S.R.Stroberg, I.Vernon Ab initio predictions link the neutron skin of 208Pb to nuclear forces NUCLEAR STRUCTURE 208Pb; analyzed available data; calculated neutron skin using Ab initio, bulk properties.
doi: 10.1038/s41567-022-01715-8
2022KA35 Phys.Rev.Lett. 129, 142502 (2022) S.Kaur, R.Kanungo, W.Horiuchi, G.Hagen, J.D.Holt, B.S.Hu, T.Miyagi, T.Suzuki, F.Ameil, J.Atkinson, Y.Ayyad, S.Bagchi, D.Cortina-Gil, I.Dillmann, A.Estrade, A.Evdokimov, F.Farinon, H.Geissel, G.Guastalla, R.Janik, R.Knobel, J.Kurcewicz, Y.A.Litvinov, M.Marta, M.Mostazo, I.Mukha, C.Nociforo, H.J.Ong, T.Otsuka, S.Pietri, A.Prochazka, C.Scheidenberger, B.Sitar, P.Strmen, M.Takechi, J.Tanaka, I.Tanihata, S.Terashima, J.Vargas, H.Weick, J.S.Winfield Proton Distribution Radii of 16-24O: Signatures of New Shell Closures and Neutron Skin NUCLEAR REACTIONS 12C(16O, X), (18O, X), (19O, X), (20O, X), (21O, X), (22O, X), (23O, X), (24O, X), E<1 GeV/nucleon; measured reaction products. 16,18,20,21,22,23,24O; deduced charge changing σ, root mean square proton and matter radii, neutron skin thickness, shell closure. Comparison with with ab initio calculations employing the chiral NNLO sat interaction, shell model predictions. The fragment separator FRS at GSI.
doi: 10.1103/PhysRevLett.129.142502
2022KO04 Phys.Rev. C 105, L021303 (2022) M.Kortelainen, Z.Sun, G.Hagen, W.Nazarewicz, T.Papenbrock, P.-G.Reinhard Universal trend of charge radii of even-even Ca-Zn nuclei NUCLEAR STRUCTURE 36,38,40,42,44,46,48,50,52,54,56,58,60Ca, 42,44,46,48,50,52,54,56,58,60,62Ti, 44,46,48,50,52,54,56,58,60,62,64Cr, 46,48,50,52,54,56,58,60,62,64,66Fe, 48,50,52,54,56,58,60,62,64,66,68Ni, 60,62,64,66,68,70Zn; calculated ground state energies, charge rms radii. Coupled cluster (CC) and ab-initio density functional theory calculations extended to the open-shell deformed nuclei. Comparison to available data.
doi: 10.1103/PhysRevC.105.L021303
2022MA04 Phys.Rev.Lett. 128, 022502 (2022) S.Malbrunot-Ettenauer, S.Kaufmann, S.Bacca, C.Barbieri, J.Billowes, M.L.Bissell, K.Blaum, B.Cheal, T.Duguet, R.F.Garcia Ruiz, W.Gins, C.Gorges, G.Hagen, H.Heylen, J.D.Holt, G.R.Jansen, A.Kanellakopoulos, M.Kortelainen, T.Miyagi, P.Navratil, W.Nazarewicz, R.Neugart, G.Neyens, W.Nortershauser, S.J.Novario, T.Papenbrock, T.Ratajczyk, P.-G.Reinhard, L.V.Rodriguez, R.Sanchez, S.Sailer, A.Schwenk, J.Simonis, V.Soma, S.R.Stroberg, L.Wehner, C.Wraith, L.Xie, Z.Y.Xu, X.F.Yang, D.T.Yordanov Nuclear Charge Radii of the Nickel Isotopes 58-68, 70Ni NUCLEAR MOMENTS 58,59,60,61,62,63,64,65,66,67,68Ni, 70Ni; measured frequency-time spectrum; deduced isotope shifts, mean-square charge radii. Comparison with ab initio approaches. Collinear laser spectroscopy beam line COLLAPS, ISOLDE/CERN.
doi: 10.1103/PhysRevLett.128.022502
2022MI13 Phys.Rev. C 106, 024004 (2022) C.Mishra, A.Ekstrom, G.Hagen, T.Papenbrock, L.Platter Two-pion exchange as a leading-order contribution in chiral effective field theory
doi: 10.1103/PhysRevC.106.024004
2022OH01 Phys.Rev. C 105, L031305 (2022) B.Ohayon, R.F.Garcia Ruiz, Z.H.Sun, G.Hagen, T.Papenbrock, B.K.Sahoo Nuclear charge radii of Na isotopes: Interplay of atomic and nuclear theory NUCLEAR STRUCTURE 18,20,22,24,26,28Ne, 21,23,25,27,28,31Na, 22,24,26,28,30,32Mg; analyzed experimental isotope shifts (from 2012YO01, 1978HU12, 2011MA48, 1975HU04); deduced charge radii using improved atomic calculations and nuclear coupled-cluster theory. Developed analytic response-based RCC (AR-RCC) theory to include full triple electron excitations and perturbatively estimate quadrupole excitations. Comparison to the results obtained with atomic parameters obtained with different calculations and with values returned from the semiempirical neutron-skin for Na isotopes.
doi: 10.1103/PhysRevC.105.L031305
2022SO15 Phys.Rev. C 106, 034310 (2022) J.E.Sobczyk, S.Bacca, G.Hagen, T.Papenbrock Spectral function for 4He using the Chebyshev expansion in coupled-cluster theory NUCLEAR REACTIONS 4He(e, e'), at momentum transfers q ≈ 270-670 MeV; calculated intrinsic momentum distribution, and compared with that in laboratory system, spectral functions, differential σ(momentum transfer) using coupled-cluster singles-and-doubles (CCSD) approximation, with an expansion of integral transforms into Chebyshev polynomials.
doi: 10.1103/PhysRevC.106.034310
2022ST03 Phys.Rev. C 105, 034333 (2022) S.R.Stroberg, J.Henderson, G.Hackman, P.Ruotsalainen, G.Hagen, J.D.Holt Systematics of E2 strength in the sd shell with the valence-space in-medium similarity renormalization group NUCLEAR STRUCTURE 18O, 18,19,21,22Ne, 19,21F, 21,23Na, 21,22,23,25,26Mg, 25,27,34Al, 26,27,29,30Si, 29,31,33P, 30,31,34S, 33,34Ar; calculated B(E2). 14C; calculated energies of first 0+ and 2+ states, neutron and proton quadrupole-excitation amplitudes. Ab initio valence-space in-medium similarity renormalization group (VS-IMSRG) and shell-model calculations with the USDB interaction. Comparison to experimental data.
doi: 10.1103/PhysRevC.105.034333
2022SU28 Phys.Rev. C 106, L061302 (2022) Z.H.Sun, C.A.Bell, G.Hagen, T.Papenbrock How to renormalize coupled cluster theory ATOMIC MASSES 20,22,24,26,28,30,32,34Na, 16,24O, 40,48Ca, 78Ni, 90Zr, 100Sn; calculated binding energies, energies per nucleon. Coupled cluster theory with included short-range three-body correlations by renormalizing the three-body contact interaction. Comparison to experimental values.
doi: 10.1103/PhysRevC.106.L061302
2021BO06 Eur.Phys.J. A 57, 42 (2021) V.Bontems, T.Duguet, G.Hagen, V.Soma Topical issue on the tower of effective (field) theories and the emergence of nuclear phenomena
doi: 10.1140/epja/s10050-021-00356-4
2021HO15 Phys.Lett. B 822, 136710 (2021) M.Holl, R.Kanungo, Z.H.Sun, G.Hagen, J.A.Lay, A.M.Moro, P.Navratil, T.Papenbrock, M.Alcorta, D.Connolly, B.Davids, A.Diaz Varela, M.Gennari, G.Hackman, J.Henderson, S.Ishimoto, A.I.Kilic, R.Krucken, A.Lennarz, J.Liang, J.Measures, W.Mittig, O.Paetkau, A.Psaltis, S.Quaglioni, J.S.Randhawa, J.Smallcombe, I.J.Thompson, M.Vorabbi, M.Williams Proton inelastic scattering reveals deformation in 8He NUCLEAR REACTIONS 1H(8He, p), E=8.25 MeV/nucleon; measured reaction products, Ep, Ip. 8He; deduced σ(θ), resonance parameters, first 2+ state, quadrupole deformation parameter. Comparison with no-core shell model predictions. Charged particle spectroscopy station IRIS at TRIUMF in Canada.
doi: 10.1016/j.physletb.2021.136710
2021KO08 Nat.Phys. 17, 439 (2021), Erratum Nat.Phys. 17, 539 (2021) A.Koszorus, X.F.Yang, W.G.Jiang, S.J.Novario, S.W.Bai, J.Billowes, C.L.Binnersley, M.L.Bissell, T.E.Cocolios, B.S.Cooper, R.P.de Groote, A.Ekstrom, K.T.Flanagan, C.Forssen, S.Franchoo, R.F.Garcia Ruiz, F.P.Gustafsson, G.Hagen, G.R.Jansen, A.Kanellakopoulos, M.Kortelainen, W.Nazarewicz, G.Neyens, T.Papenbrock, P.-G.Reinhard, C.M.Ricketts, B.K.Sahoo, A.R.Vernon, S.G.Wilkins Charge radii of exotic potassium isotopes challenge nuclear theory and the magic character of N = 32 NUCLEAR MOMENTS 36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52K; measured frequencies; deduced hyperfine structure spectra, charge radii, new magic numbers. Comparison with NNLO, HFB calculations.
doi: 10.1038/s41567-020-01136-5
2021MO23 Nat.Phys. 17, 1099 (2021) M.Mougeot, D.Atanasov, J.Karthein, R.N.Wolf, P.Ascher, K.Blaum, K.Chrysalidis, G.Hagen, J.D.Holt, W.J.Huang, G.R.Jansen, I.Kulikov, Yu.A.Litvinov, D.Lunney, V.Manea, T.Miyagi, T.Papenbrock, L.Schweikhard, A.Schwenk, T.Steinsberger, S.R.Stroberg, Z.H.Sun, A.Welker, F.Wienholtz, S.G.Wilkins, K.Zuber Mass measurements of 99-101In challenge ab initio nuclear theory of the nuclide 100Sn NUCLEAR REACTIONS La(p, X)99In/100In/101In, E=1.4 GeV; measured reaction products, TOF; deduced atomic masses. Comparison with AME2020, theoretical calculations.
doi: 10.1038/s41567-021-01326-9
2021NO04 Phys.Rev.Lett. 126, 182502 (2021) S.Novario, P.Gysbers, J.Engel, G.Hagen, G.R.Jansen, T.D.Morris, P.Navratil, T.Papenbrock, S.Quaglioni Coupled-Cluster Calculations of Neutrinoless Double-β Decay in 48Ca RADIOACTIVITY 48Ca(2β-); calculated nuclear matrix element for the neutrinoless ββ-decay using coupled-cluster theory and nuclear interactions from chiral effective field theory.
doi: 10.1103/PhysRevLett.126.182502
2021SO24 Phys.Rev.Lett. 127, 072501 (2021) J.E.Sobczyk, B.Acharya, S.Bacca, G.Hagen Ab Initio Computation of the Longitudinal Response Function in 40Ca NUCLEAR STRUCTURE 40Ca; calculated longitudinal response function using the coupled-cluster and Lorentz integral transform methods starting from chiral nucleon-nucleon and three-nucleon interactions.
doi: 10.1103/PhysRevLett.127.072501
2021SU22 Phys.Rev. C 104, 064310 (2021) Z.H.Sun, G.Hagen, G.R.Jansen, T.Papenbrock Effective shell-model interaction for nuclei "southeast" of 100Sn NUCLEAR STRUCTURE 100Sn; calculated single-particle neutron and single-hole proton states from effective shell-model interaction for the valence space and using chiral nucleon-nucleon and three-nucleon forces and single-reference coupled-cluster theory and ΔNNLOGO potentials, with detailed matrix elements given in the Supplemental Material. 98Cd, 100In, 100,102Sn; calculated ground-state energies relative using 1.8/2.0(EM) and ΔNNLOGO potentials and compared to experimental data. 102,104,106,108Sn, 98Cd, 100,101,103,105,107In, 100,102,104,106Cd, ; calculated low-lying positive-parity levels from Jπ=0+ to 8+ for even-A and low-lying positive- and negative-parity levels from Jπ=1/2- to 13/2+ for odd-A using 1.8/2.0(EM) and ΔNNLOGO potentials, and compared to experimental data. Systematic derivation of the particle-hole variant of the shell-model coupled-cluster method to compute nuclei in the vicinity of 100Sn, with the shell-model effective interaction defined in a model space consisting of particles and holes.
doi: 10.1103/PhysRevC.104.064310
2021YA13 Phys.Rev. C 103, 054304 (2021) C.-J.Yang, A.Ekstrom, C.Forssen, G.Hagen Power counting in chiral effective field theory and nuclear binding NUCLEAR STRUCTURE 3H, 3,4He, 6Li, 16O; calculated ground-state energies and point-proton radii from ab initio no-core shell model (NCSM) and coupled-channel (CC) calculations at LO and NLO in χEFT using several power-counting (PC) schemes which all exhibit renormalization-group (RG)-invariance, and analysis of nucleon-nucleon scattering phase shifts. Comparison with experimental data.
doi: 10.1103/PhysRevC.103.054304
2020BA27 Phys.Rev.Lett. 124, 222504 (2020) S.Bagchi, R.Kanungo, Y.K.Tanaka, H.Geissel, P.Doornenbal, W.Horiuchi, G.Hagen, T.Suzuki, N.Tsunoda, D.S.Ahn, H.Baba, K.Behr, F.Browne, S.Chen, M.L.Cortes, A.Estrade, N.Fukuda, M.Holl, K.Itahashi, N.Iwasa, G.R.Jansen, W.G.Jiang, S.Kaur, A.O.Macchiavelli, S.Y.Matsumoto, S.S.Momiyama, I.Murray, T.Nakamura, S.J.Novario, H.J.Ong, T.Otsuka, T.Papenbrock, S.Paschalis, A.Prochazka, C.Scheidenberger, P.Schrock, Y.Shimizu, D.Steppenbeck, H.Sakurai, D.Suzuki, H.Suzuki, M.Takechi, H.Takeda, S.Takeuchi, R.Taniuchi, K.Wimmer, K.Yoshida Two-Neutron Halo is Unveiled in 29F NUCLEAR REACTIONS C(29F, X), E=255 MeV/nucleon; C(27F, X), E=250 MeV/nucleon; measured reaction products, En, In. 27,29F; deduced two-neutron Borromean halo. Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.124.222504
2020JI11 Phys.Rev. C 102, 054301 (2020) W.G.Jiang, A.Ekstrom, C.Forssen, G.Hagen, G.R.Jansen, T.Papenbrock Accurate bulk properties of nuclei from A = 20 to ∞ from potentials with Δ isobars NUCLEAR STRUCTURE 2,3H, 3,4He, 16,22,24O, 40,48,50,52,54,56,58,60Ca, 78Ni, 90Zr, 100,132Sn; calculated binding energies, and charge radii for Ca isotopes, quadrupole moment for 2H, first 3- state of 16O, and first 2+ states of 22O, 24O and 48Ca. Coupled-cluster calculations with ΔNNLOGO interactions optimized from chiral effective field theory. Comparison with experimental data. Computed neutron-proton and proton-proton phase shifts for the contact and selected peripheral partial waves with the ΔNLOGO and ΔNNLOGO potentials.
doi: 10.1103/PhysRevC.102.054301
2020KA22 Phys.Rev.Lett. 124, 132502 (2020) S.Kaufmann, J.Simonis, S.Bacca, J.Billowes, M.L.Bissell, K.Blaum, B.Cheal, R.F.Garcia Ruiz, W.Gins, C.Gorges, G.Hagen, H.Heylen, A.Kanellakopoulos, S.Malbrunot-Ettenauer, M.Miorelli, R.Neugart, G.Neyens, W.Nortershauser, R.Sanchez, S.Sailer, A.Schwenk, T.Ratajczyk, L.V.Rodriguez, L.Wehner, C.Wraith, L.Xie, Z.Y.Xu, X.F.Yang, D.T.Yordanov Charge Radius of the Short-Lived 68Ni and Correlation with the Dipole Polarizability NUCLEAR MOMENTS 58,60,61,62,64,68Ni; measured frequencies; deduced resonance spectra, isotope shifts, nuclear charge radii. Comparison with novel coupled-cluster calculations.
doi: 10.1103/PhysRevLett.124.132502
2020NO10 Phys.Rev. C 102, 051303(R) (2020) S.J.Novario, G.Hagen, G.R.Jansen, T.Papenbrock Charge radii of exotic neon and magnesium isotopes NUCLEAR STRUCTURE 18,20,22,24,26,28,30,32,34Ne, 22,24,26,28,30,32,34,36,38,40Mg; calculated charge radii, isotope shifts, ground-state energies, S(2n) using nucleon-nucleon and three-nucleon potentials from chiral effective field theory (EFT), and coupled-cluster methods. Comparison with experimental data.
doi: 10.1103/PhysRevC.102.051303
2020SO21 Phys.Rev. C 102, 064312 (2020) J.E.Sobczyk, B.Acharya, S.Bacca, G.Hagen Coulomb sum rule for 4He and 16O from coupled-cluster theory NUCLEAR STRUCTURE 4He, 16O; calculated Coulomb sum rule (CSR), squared elastic form factors, spurious 1- states as functions of the momentum transfer of 0-500 MeV. Coupled-cluster theory using interactions from chiral effective field theory (EFT). Relevance to improving understanding of neutrino-nucleus scattering process.
doi: 10.1103/PhysRevC.102.064312
2019BA11 Phys.Lett. B 790, 251 (2019) S.Bagchi, R.Kanungo, W.Horiuchi, G.Hagen, T.D.Morris, S.R.Stroberg, T.Suzuki, F.Ameil, J.Atkinson, Y.Ayyad, D.Cortina-Gil, I.Dillmann, A.Estrade, A.Evdokimov, F.Farinon, H.Geissel, G.Guastalla, R.Janik, S.Kaur, R.Knobel, J.Kurcewicz, Yu.A.Litvinov, M.Marta, M.Mostazo, I.Mukha, C.Nociforo, H.J.Ong, S.Pietri, A.Prochazka, C.Scheidenberger, B.Sitar, P.Strmen, M.Takechi, J.Tanaka, Y.Tanaka, I.Tanihata, S.Terashima, J.Vargas, H.Weick, J.S.Winfield Neutron skin and signature of the N = 14 shell gap found from measured proton radii of 17-22N NUCLEAR REACTIONS C(14N, X), (15N, X), (17N, X), (18N, X), (19N, X), (20N, X), (21N, X), (22N, X), E=851-932 MeV/nucleon; measured reaction products. 14,15,17,18,19,20,21,22N; deduced σ, root mean square point proton and matter radii, unconventional shell gap at N = 14 arising from the attractive proton–neutron tensor interaction. Comparison with ab initio calculations.
doi: 10.1016/j.physletb.2019.01.024
2019EK02 Phys.Rev.Lett. 123, 252501 (2019) Global Sensitivity Analysis of Bulk Properties of an Atomic Nucleus NUCLEAR STRUCTURE 16O; calculated energies, charge radius.
doi: 10.1103/PhysRevLett.123.252501
2019GY02 Nat.Phys. 15, 428 (2019) P.Gysbers, G.Hagen, J.D.Holt, G.R.Jansen, T.D.Morris, P.Navratil, T.Papenbrock, S.Quaglioni, A.Schwenk, S.R.Stroberg, K.A.Wendt Discrepancy between experimental and theoretical β-decay rates resolved from first principles NUCLEAR STRUCTURE 3H, 6Li, 7Be, 8He, 10C, 14O, 19,24Ne, 37K, 25,28Al, 24,26Na, 30Mg, 33,34P, 42,43,46Sc, 42,45Ti, 45,47V, 100Sn; calculated the Gamow–Teller strength for β decay.
doi: 10.1038/s41567-019-0450-7
2019JI09 Phys.Rev. C 100, 054326 (2019) W.G.Jiang, G.Hagen, T.Papenbrock Extrapolation of nuclear structure observables with artificial neural networks NUCLEAR STRUCTURE 4He, 6Li, 16O; calculated ground-state energies, point-proton radii using neural network method for extrapolation of NCSM and the coupled-cluster calculations. Comparison with results from infrared (IR) extrapolations.
doi: 10.1103/PhysRevC.100.054326
2019LI10 Phys.Rev.Lett. 122, 072502 (2019) H.N.Liu, A.Obertelli, P.Doornenbal, C.A.Bertulani, G.Hagen, J.D.Holt, G.R.Jansen, T.D.Morris, A.Schwenk, R.Stroberg, N.Achouri, H.Baba, F.Browne, D.Calvet, F.Chateau, S.Chen, N.Chiga, A.Corsi, M.L.Cortes, A.Delbart, J.-M.Gheller, A.Giganon, A.Gillibert, C.Hilaire, T.Isobe, T.Kobayashi, Y.Kubota, V.Lapoux, T.Motobayashi, I.Murray, H.Otsu, V.Panin, N.Paul, W.Rodriguez, H.Sakurai, M.Sasano, D.Steppenbeck, L.Stuhl, Y.L.Sun, Y.Togano, T.Uesaka, K.Wimmer, K.Yoneda, O.Aktas, T.Aumann, L.X.Chung, F.Flavigny, S.Franchoo, I.Gasparic, R.-B.Gerst, J.Gibelin, K.I.Hahn, D.Kim, T.Koiwai, Y.Kondo, P.Koseoglou, J.Lee, C.Lehr, B.D.Linh, T.Lokotko, M.MacCormick, K.Moschner, T.Nakamura, S.Y.Park, D.Rossi, E.Sahin, D.Sohler, P.-A.Soderstrom, S.Takeuchi, H.Tornqvist, V.Vaquero, V.Wagner, S.Wang, V.Werner, X.Xu, H.Yamada, D.Yan, Z.Yang, M.Yasuda, L.Zanetti How Robust is the N=34 Subshell Closure? First Spectroscopy of 52Ar NUCLEAR REACTIONS 1H(53K, 2p), E=245 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, σ. Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.122.072502
2019PA55 Phys.Rev. C 100, 061304 (2019) C.G.Payne, S.Bacca, G.Hagen, W.G.Jiang, T.Papenbrock Coherent elastic neutrino-nucleus scattering on 40Ar from first principles NUCLEAR REACTIONS 40Ar(ν, ν), E<50 MeV; calculated charge and weak form factors, neutron skin radius, coherent scattering σ(E) using coupled-cluster theory based on nuclear Hamiltonians inspired by effective field theories of quantum chromodynamics; deduced that nuclear physics uncertainties will likely not limit the sensitivity to new physics. Comparison to data from electron scattering experiments. Estimation of systematic uncertainties.
doi: 10.1103/PhysRevC.100.061304
2019RA06 Phys.Rev. C 99, 021301 (2019) J.S.Randhawa, R.Kanungo, M.Holl, J.D.Holt, P.Navratil, S.R.Stroberg, G.Hagen, G.R.Jansen, M.Alcorta, C.Andreoiu, C.Barnes, C.Burbadge, D.Burke, A.A.Chen, A.Chester, G.Christian, S.Cruz, B.Davids, J.Even, G.Hackman, J.Henderson, S.Ishimoto, P.Jassal, S.Kaur, M.Keefe, D.Kisliuk, R.Krucken, J.Liang, J.Lighthall, E.McGee, J.Measures, M.Moukaddam, E.Padilla-Rodal, A.Shotter, I.J.Thompson, J.Turko, M.Williams, O.Workman Observation of excited states in 20Mg sheds light on nuclear forces and shell evolution NUCLEAR REACTIONS 2H(20Mg, d), (20Mg, d'), E=8.5 MeV/nucleon, [secondary 20Mg beam produced in Si(p, X), E=480 MeV fragmentation reaction using SiC target at ISAC-II facility]; measured scattered deuteron spectra, differential σ(θ) using annular single-sided silicon strip detector array and CsI(Tl) detectors (IRIS reaction spectroscopy facility) at TRIUMF. 20Mg; deduced levels, J, π, proton-unbound resonances. Comparison with ab initio calculations using the valence-space in-medium similarity renormalization-group (VS-IMSRG) approach.
doi: 10.1103/PhysRevC.99.021301
2019SI46 Eur.Phys.J. A 55, 241 (2019) First principles electromagnetic responses in medium-mass nuclei
doi: 10.1140/epja/i2019-12825-0
2018BA42 Phys.Rev. C 98, 054301 (2018) A.Bansal, S.Binder, A.Ekstrom, G.Hagen, G.R.Jansen, T.Papenbrock Pion-less effective field theory for atomic nuclei and lattice nuclei NUCLEAR STRUCTURE 3H, 3,4He, 16O, 40Ca; calculated binding energies per nucleon and point-proton radii, g.s. energy and separation momentum of 3H and 4He, correlation between the triton and 4He binding energies. Pion-less effective field theory (EFT) as discrete variable representation (DVR) in the harmonic oscillator basis at leading-order and next-to-leading-order. Relevance to different lattice quantum chromodynamics (QCD) approaches to light nuclei.
doi: 10.1103/PhysRevC.98.054301
2018EK02 Phys.Rev. C 97, 024332 (2018) A.Ekstrom, G.Hagen, T.D.Morris, T.Papenbrock, P.D.Schwartz Δ isobars and nuclear saturation NUCLEAR STRUCTURE 2,3H, 3,4He; calculated binding energies, charge radii at LO, NLO, and NNLO with and without the Δ(1232) isobar as function of momentum cutoff values of 450 and 500 MeV. 4He, 16O, 40Ca; calculated ground-state energies per nucleon and charge radii computed with coupled cluster theory and the Δ-full potential at LO, NLO, and NNLO. 8He, 16,22,24O, 40,48Ca; calculated binding energies, charge radii, proton and neutron point radii, neutron skin. 40Ca; calculated elastic charge form factor. Chiral effective field theory with inclusion of the Δ-isobar Δ(1232) degree of freedom at all orders up to next-to-next-to-leading order (NNLO). Comparison with experimental data.
doi: 10.1103/PhysRevC.97.024332
2018FO05 Phys.Rev. C 97, 034328 (2018) C.Forssen, B.D.Carlsson, H.T.Johansson, D.Saaf, A.Bansal, G.Hagen, T.Papenbrock Large-scale exact diagonalizations reveal low-momentum scales of nuclei NUCLEAR STRUCTURE 6Li, 3H, 3,4,6,8He, 16O; calculated extrapolated ground-state energy and point-proton radii, infrared (IR) extrapolations with the NNLOopt NN interaction. No-core shell model (NCSM) calculations with the coupled-cluster method at several fixed ultraviolet (UV) cutoffs using pANTOINE code; deduced small-momentum scale of finite nuclei.
doi: 10.1103/PhysRevC.97.034328
2018MI09 Phys.Rev. C 98, 014324 (2018) M.Miorelli, S.Bacca, G.Hagen, T.Papenbrock Computing the dipole polarizability of 48Ca with increased precision NUCLEAR STRUCTURE 4He, 16O, 48Ca; calculated electromagnetic, and polarizability sum rules, electric dipole polarizability of 48Ca by benchmarking 4He and 16O results. Coupled-cluster method by including leading order 3p-3h correlations for the ground state, excited states, and the similarity-transformed operator. Comparison with experimental data.
doi: 10.1103/PhysRevC.98.014324
2018MO07 Phys.Rev.Lett. 120, 152503 (2018) T.D.Morris, J.Simonis, S.R.Stroberg, C.Stumpf, G.Hagen, J.D.Holt, G.R.Jansen, T.Papenbrock, R.Roth, A.Schwenk Structure of the Lightest Tin Isotopes NUCLEAR STRUCTURE 100,108,116,124,132Sn, 101Sn, 105Te; calculated energy levels, J, π using nucleon-nucleon and three-nucleon forces constrained by data of few-nucleon systems.
doi: 10.1103/physrevlett.120.152503
2018RO26 Phys.Rev. C 98, 044625 (2018) J.Rotureau, P.Danielewicz, G.Hagen, G.R.Jansen, F.M.Nunes Microscopic optical potentials for calcium isotopes NUCLEAR REACTIONS 40Ca(n, n), E=5.17, 6.34 MeV; 48Ca(n, n), E=4.00, 7.81 MeV; calculated differential σ(θ), real and imaginary parts of the diagonal optical potential and scattering phase shifts. 41,49Ca; calculated energies of bound states, and real part of the radical optical potentials. Green's function approach with coupled-cluster method with chiral nucleon-nucleon and three-nucleon interaction NNLOsat, and the chiral nucleon-nucleon interaction NNLOop. Comparison with experimental data.
doi: 10.1103/PhysRevC.98.044625
2018SU23 Phys.Rev. C 98, 054320 (2018) Z.H.Sun, T.D.Morris, G.Hagen, G.R.Jansen, T.Papenbrock Shell-model coupled-cluster method for open-shell nuclei NUCLEAR STRUCTURE 6,7,8He, 6,7,8Li; calculated low-lying levels, J, π, squared point-proton radii, and isotope shifts using shell-model coupled-cluster method employing 4He core. Comparison with other theoretical predictions.
doi: 10.1103/PhysRevC.98.054320
2017BI09 Phys.Rev.Lett. 118, 252501 (2017) J.Birkhan, M.Miorelli, S.Bacca, S.Bassauer, C.A.Bertulani, G.Hagen, H.Matsubara, P.von Neumann-Cosel, T.Papenbrock, N.Pietralla, V.Yu.Ponomarev, A.Richter, A.Schwenk, A.Tamii Electric Dipole Polarizability of 48Ca and Implications for the Neutron Skin NUCLEAR REACTIONS 48Ca(p, p'), E=295 MeV; 48Ca(γ, X), E<25 MeV; measured reaction products; deduced σ, electric dipole polarizability, B(E1).
doi: 10.1103/PhysRevLett.118.252501
2017CA06 Prog.Part.Nucl.Phys. 94, 68 (2017) J.Carlson, M.P.Carpenter, R.Casten, C.Elster, P.Fallon, A.Gade, C.Gross, G.Hagen, A.C.Hayes, D.W.Higinbotham, C.R.Howell, C.J.Horowitz, K.L.Jones, F.G.Kondev, S.Lapi, A.Macchiavelli, E.A.McCutchan, J.Natowitz, W.Nazarewicz, T.Papenbrock, S.Reddy, M.J.Savage, G.Savard, B.M.Sherrill, L.G.Sobotka, M.A.Stoyer, M.B.Tsang, K.Vetter, I.Wiedenhoever, A.H.Wuosmaa, S.Yennello White paper on nuclear astrophysics and low-energy nuclear physics, Part 2: Low-energy nuclear physics
doi: 10.1016/j.ppnp.2016.11.002
2017RO04 Phys.Rev. C 95, 024315 (2017) J.Rotureau, P.Danielewicz, G.Hagen, F.M.Nunes, T.Papenbrock Optical potential from first principles NUCLEAR REACTIONS 16O(n, n), E=10 MeV; analyzed and constructed microscopic nuclear optical potentials from chiral interactions for nucleon nucleus scattering, and phase shifts by combining the Green's function approach with the coupled cluster method.
doi: 10.1103/PhysRevC.95.024315
2016BI07 Phys.Rev. C 93, 044332 (2016) S.Binder, A.Ekstrom, G.Hagen, T.Papenbrock, K.A.Wendt Effective field theory in the harmonic oscillator basis NUCLEAR STRUCTURE 2,3H, 3,4He; calculated binding energies and radii from different effective interactions. 4He, 16O, 40Ca, 90Zr, 132Sn; calculated ground-state energies and squared point proton radii. Coupled-cluster calculations at the singles and doubles level using chiral effective field theory (EFT) in harmonic oscillator basis. Comparison with experimental data.
doi: 10.1103/PhysRevC.93.044332
2016GA34 Nat.Phys. 12, 594 (2016) R.F.Garcia Ruiz, M.L.Bissell, K.Blaum, A.Ekstrom, N.Frommgen, G.Hagen, M.Hammen, K.Hebeler, J.D.Holt, G.R.Jansen, M.Kowalska, K.Kreim, W.Nazarewicz, R.Neugart, G.Neyens, W.Nortershauser, T.Papenbrock, J.Papuga, A.Schwenk, J.Simonis, K.A.Wendt, D.T.Yordanov Unexpectedly large charge radii of neutron-rich calcium isotopes NUCLEAR REACTIONS U(p, X)43Ca/44Ca/45Ca/46Ca/47Ca/48Ca/49Ca/50Ca/51Ca/52Ca, E=1.4GeV; measured hyperfine structure spectra; deduced charge radii. Comparison with available data.
doi: 10.1038/nphys3645
2016HA27 Nat.Phys. 12, 186 (2016) G.Hagen, A.Ekstrom, C.Forssen, G.R.Jansen, W.Nazarewicz, T.Papenbrock, K.A.Wendt, S.Bacca, N.Barnea, B.Carlsson, C.Drischler, K.Hebeler, M.Hjorth-Jensen, M.Miorelli, G.Orlandini, A.Schwenk, J.Simonis Neutron and weak-charge distributions of the 48Ca nucleus NUCLEAR STRUCTURE 48Ca; calculated neutron skin parameters, radii. Ab initio calculations.
doi: 10.1038/nphys3529
2016HA32 Phys.Rev.Lett. 117, 172501 (2016) G.Hagen, G.R.Jansen, T.Papenbrock Structure of 78Ni from First-Principles Computations NUCLEAR STRUCTURE 48Ca, 77,78,79,80Ni; analyzed available data; calculated energy levels, J, π.
doi: 10.1103/PhysRevLett.117.172501
2016HA34 Phys.Scr. 91, 063006 (2016) G.Hagen, M.Hjorth-Jensen, G.R.Jansen, T.Papenbrock Emergent properties of nuclei from ab initio coupled-cluster calculations COMPILATION 4,8He, 14C, 16O, 40,48Ca, 56Ni; compiled gs energy, mass excess, difference between theoretical charge radii and data; calculated gs energy, mass excess, charge radii using ab initio approach with chiral NNLOsat interaction. NUCLEAR STRUCTURE 16,22,24,28O; calculated gs energy, mass excess using two NNLOsat interactions. Compared to available data. 17,23,25O, 53,55,61Ca; calculated low-lying unbound levels, J, π using harmonic oscillator HF basis and Gamow-Hartree-Fock basis. 20Ne, 24Mg; calculated yrast states using CCEI (Coupled Cluster Effective Interaction) and USDB; compared to data.
doi: 10.1088/0031-8949/91/6/063006
2016JA03 Phys.Rev. C 94, 011301 (2016) G.R.Jansen, M.D.Schuster, A.Signoracci, G.Hagen, P.Navratil Open sd-shell nuclei from first principles NUCLEAR STRUCTURE 18,19,20,21,22,23,24,25,26,27,28,29,30Ne, 20,21,22,23,24,25,26,27,28,29,30Mg; calculated ground-state energies. 24F, 19,20,24,25,26,27Ne, 22,23,24,25,26Mg; calculated low-spin levels, J, π, B(E2) strengths. Calculations are based on an extension of ab initio coupled-cluster effective interaction (CCEI) method. Comparison with experimental data taken from the ENSDF database.
doi: 10.1103/PhysRevC.94.011301
2016KA37 Phys.Rev.Lett. 117, 102501 (2016) R.Kanungo, W.Horiuchi, G.Hagen, G.R.Jansen, P.Navratil, F.Ameil, J.Atkinson, Y.Ayyad, D.Cortina-Gil, I.Dillmann, A.Estrade, A.Evdokimov, F.Farinon, H.Geissel, G.Guastalla, R.Janik, M.Kimura, R.Knobel, J.Kurcewicz, Yu.A.Litvinov, M.Marta, M.Mostazo, I.Mukha, C.Nociforo, H.J.Ong, S.Pietri, A.Prochazka, C.Scheidenberger, B.Sitar, P.Strmen, Y.Suzuki, M.Takechi, J.Tanaka, I.Tanihata, S.Terashima, J.Vargas, H.Weick, J.S.Winfield Proton Distribution Radii of 12-19C Illuminate Features of Neutron Halos NUCLEAR REACTIONS Be(20Ne, X), (40Ar, X)12C/13C/14C/15/16C/17C/18C/19C, E=1 GeV/nucleon; measured reaction products; deduced σ, root-mean-square proton and matter radii, neutron skin thickness. Comparison with ab initio calculations.
doi: 10.1103/PhysRevLett.117.102501
2016MI19 Phys.Rev. C 94, 034317 (2016) M.Miorelli, S.Bacca, N.Barnea, G.Hagen, G.R.Jansen, G.Orlandini, T.Papenbrock Electric dipole polarizability from first principles calculations NUCLEAR STRUCTURE 4He, 16,22O, 40Ca; calculated electric dipole polarizability, photoabsorption response functions. Coupled-cluster method with bound-state techniques, and using different interactions from chiral effective field theory. Comparison with experimental data. Relevance to radii of proton and neutron distributions.
doi: 10.1103/PhysRevC.94.034317
2015EK01 Phys.Rev. C 91, 051301 (2015) A.Ekstrom, G.R.Jansen, K.A.Wendt, G.Hagen, T.Papenbrock, B.D.Carlsson, C.Forssen, M.Hjorth-Jensen, P.Navratil, W.Nazarewicz Accurate nuclear radii and binding energies from a chiral interaction NUCLEAR STRUCTURE 2H, 4,8He, 6,9Li, 14C, 16O, 40Ca; calculated ground-state energies, charge radii, quadrupole moment for deuteron. 6Li, 14C, 16O, 22,24F, 22,24O, 40Ca; calculated levels, J, π, charge density in 16O, scattering lengths, and effective ranges in low-energy proton-proton scattering, scattering phase shifts in low-energy neutron-proton scattering, half-life for the β- decay of 3H; deduced consistently optimized interaction from chiral EFT at NNLO for nuclei and infinite nuclear matter. Coupled-cluster calculations based on chiral effective field theory interaction (NNLOsat). Comparison with experimental data.
doi: 10.1103/PhysRevC.91.051301
2015KA15 Phys.Rev.Lett. 114, 192502 (2015) R.Kanungo, A.Sanetullaev, J.Tanaka, S.Ishimoto, G.Hagen, T.Myo, T.Suzuki, C.Andreoiu, P.Bender, A.A.Chen, B.Davids, J.Fallis, J.P.Fortin, N.Galinski, A.T.Gallant, P.E.Garrett, G.Hackman, B.Hadinia, G.Jansen, M.Keefe, R.Krucken, J.Lighthall, E.McNeice, D.Miller, T.Otsuka, J.Purcell, J.S.Randhawa, T.Roger, A.Rojas, H.Savajols, A.Shotter, I.Tanihata, I.J.Thompson, C.Unsworth, P.Voss, Z.Wang Evidence of Soft Dipole Resonance in 11Li with Isoscalar Character NUCLEAR REACTIONS 2H(11Li, X)7Li/8Li/9Li/10Li/11Li, E=5.5 MeV/nucleon; measured reaction products. 11Li; deduced yields, σ(θ), excitation energy, soft dipole resonance. Comparison with ab initio calculations in the coupled cluster framework.
doi: 10.1103/PhysRevLett.114.192502
2015SI12 Phys.Rev. C 91, 064320 (2015) A.Signoracci, T.Duguet, G.Hagen, G.R.Jansen Ab initio Bogoliubov coupled cluster theory for open-shell nuclei NUCLEAR STRUCTURE 16,18,20O, 18Ne, 20Mg; calculated ground-state energies and the cluster amplitudes at the singles and doubles level (BCCSD), algebraically and diagrammatically. Ab initio Bogoliubov coupled cluster (BCC) theory for open shell nuclei.
doi: 10.1103/PhysRevC.91.064320
2014BA62 Phys.Rev. C 90, 064619 (2014) S.Bacca, N.Barnea, G.Hagen, M.Miorelli, G.Orlandini, T.Papenbrock Giant and pigmy dipole resonances in 4He, 16, 22O, and 40Ca from chiral nucleon-nucleon interactions NUCLEAR REACTIONS 4He, 16,22O, 40Ca(γ, n), E not given; calculated dipole response functions using Lorentz integral transform combined with the CC method (LITCC), GDR and PDR, low-lying E1 strength in 22O, electric dipole polarizability in 40Ca. Comparison with experimental data.
doi: 10.1103/PhysRevC.90.064619
2014EK01 Phys.Rev.Lett. 113, 262504 (2014) A.Ekstrom, G.R.Jansen, K.A.Wendt, G.Hagen, T.Papenbrock, S.Bacca, B.Carlsson, D.Gazit Effects of Three-Nucleon Forces and Two-Body Currents on Gamow-Teller Strengths RADIOACTIVITY 14C, 22,24O(β-); calculated quenching factor; deduced a novel coupled-cluster technique for the computation of spectra in the daughter nuclei and made several predictions and spin assignments in the exotic neutron-rich isotopes of fluorine. NUCLEAR STRUCTURE 14N, 22,24F; calculated energy levels, J, π.
doi: 10.1103/PhysRevLett.113.262504
2014HA01 Phys.Rev. C 89, 014319 (2014) G.Hagen, T.Papenbrock, A.Ekstrom, K.A.Wendt, G.Baardsen, S.Gandolfi, M.Hjorth-Jensen, C.J.Horowitz Coupled-cluster calculations of nucleonic matter NUCLEAR STRUCTURE A=10-1000; N=66, 132; calculated relative finite-size corrections for the kinetic energy in pure neutron matter, E/A of nuclear and neutron matter. Coupled-cluster computations of equation of state (EoS) for symmetric nuclear matter and neutron matter using optimized nucleon-nucleon (NN) potential NNLOopt at next-to-next-to leading order. Comparison with benchmark calculations.
doi: 10.1103/PhysRevC.89.014319
2014JA14 Phys.Rev.Lett. 113, 142502 (2014) G.R.Jansen, J.Engel, G.Hagen, P.Navratil, A.Signoracci Ab Initio Coupled-Cluster Effective Interactions for the Shell Model: Application to Neutron-Rich Oxygen and Carbon Isotopes NUCLEAR STRUCTURE 19,20,21,22,23,24O, 17,18,19,20,21,22C; calculated energy levels, J, π. Comparison with available data.
doi: 10.1103/PhysRevLett.113.142502
2014OR05 Few-Body Systems 55, 907 (2014) G.Orlandini, S.Bacca, N.Barnea, G.Hagen, M.Miorelli, T.Papenbrock Coupling the Lorentz Integral Transform (LIT) and the Coupled Cluster (CC) Methods: A Way Towards Continuum Spectra of "Not-So-Few-Body" System NUCLEAR REACTIONS 16O, 40Ca(γ, X), E=10-20 MeV; analyzed available data; deduced resonance parameters for the giant dipole resonance. LIT and CC calculations.
doi: 10.1007/s00601-013-0772-4
2014VA02 Phys.Rev. C 89, 054323 (2014) Zs.Vajta, M.Stanoiu, D.Sohler, G.R.Jansen, F.Azaiez, Zs.Dombradi, O.Sorlin, B.A.Brown, M.Belleguic, C.Borcea, C.Bourgeois, Z.Dlouhy, Z.Elekes, Zs.Fulop, S.Grevy, D.Guillemaud-Mueller, G.Hagen, M.Hjorth-Jensen, F.Ibrahim, A.Kerek, A.Krasznahorkay, M.Lewitowicz, S.M.Lukyanov, S.Mandal, P.Mayet, J.Mrazek, F.Negoita, Yu.-E.Penionzhkevich, Zs.Podolyak, P.Roussel-Chomaz, M.G.Saint-Laurent, H.Savajols, G.Sletten, J.Timar, C.Timis, A.Yamamoto Excited states in the neutron-rich nucleus 25F NUCLEAR REACTIONS C(26Ne, 25F), (27Na, 25F), (28Na, 25F), [secondary 26Ne, 27,28Na beams from C(36S, X), E=77.5 MeV/nucleon primary reaction], E=54-65 MeV/nucleon; measured Eγ, Iγ, γγ-, (25F)γ-coin, time-of-flight using SPEG magnetic spectrometer and an array of 74 BaF2 crystals for γ-rays at GANIL facility, GEANT4 simulations. 25F; deduced levels, J, π. Comparison with shell-model calculations, coupled-cluster theory, and other data.
doi: 10.1103/PhysRevC.89.054323
2013BA47 Phys.Rev.Lett. 111, 122502 (2013) S.Bacca, N.Barnea, G.Hagen, G.Orlandini, T.Papenbrock First Principles Description of the Giant Dipole Resonance in 16O NUCLEAR STRUCTURE 16O; calculated giant dipole resonance parameters, position and strength. Nucleon-nucleon interaction, comparison with available data.
doi: 10.1103/PhysRevLett.111.122502
2013BA58 Phys.Rev. C 88, 054312 (2013) G.Baardsen, A.Ekstrom, G.Hagen, M.Hjorth-Jensen Coupled-cluster studies of infinite nuclear matter
doi: 10.1103/PhysRevC.88.054312
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
2013EK01 Phys.Rev.Lett. 110, 192502 (2013) A.Ekstrom, G.Baardsen, C.Forssen, G.Hagen, M.Hjorth-Jensen, G.R.Jansen, R.Machleidt, W.Nazarewicz, T.Papenbrock, J.Sarich, S.M.Wild Optimized Chiral Nucleon-Nucleon Interaction at Next-to-Next-to-Leading Order NUCLEAR STRUCTURE 3H, 3,4He, 10B, 17,22,24O, 40,48,50,52,54,56Ca; calculated energy of the first 2+ state, energy per nucleon for neutron matter, phase shifts. The nucleon-nucleon interaction from chiral effective field theory at next-to-next-to-leading order (NNLO).
doi: 10.1103/PhysRevLett.110.192502
2013FO06 Phys.Scr. T152, 014022 (2013) C.Forssen, G.Hagen, M.Hjorth-Jensen, W.Nazarewicz, J.Rotureau Living on the edge of stability, the limits of the nuclear landscape
doi: 10.1088/0031-8949/2013/T152/014022
2013HA32 Phys.Rev.Lett. 111, 132501 (2013) G.Hagen, P.Hagen, H.-W.Hammer, L.Platter Efimov Physics Around the Neutron-Rich 60Ca Isotope NUCLEAR STRUCTURE 60,61,62Ca; calculated neutron S-wave scattering phase shifts; deduced correlations between different three-body observables and the two-neutron separation energy. Modern ab initio interactions derived from chiral effective theory.
doi: 10.1103/PhysRevLett.111.132501
2013LE03 Phys.Rev.Lett. 110, 082502 (2013) A.Lepailleur, O.Sorlin, L.Caceres, B.Bastin, C.Borcea, R.Borcea, B.A.Brown, L.Gaudefroy, S.Grevy, G.F.Grinyer, G.Hagen, M.Hjorth-Jensen, G.R.Jansen, O.Llidoo, F.Negoita, F.de Oliveira, M.-G.Porquet, F.Rotaru, M.-G.Saint-Laurent, D.Sohler, M.Stanoiu, J.C.Thomas Spectroscopy of 26F to Probe Proton-Neutron Forces Close to the Drip Line RADIOACTIVITY 26F(β-), (β-n) [from Be(36S, X)26F, E=77.6 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced decay scheme, J, π, long-lived isomer T1/2. Comparison with available data.
doi: 10.1103/PhysRevLett.110.082502
2013MO11 Phys.Rev. C 87, 044326 (2013) S.N.More, A.Ekstrom, R.J.Furnstahl, G.Hagen, T.Papenbrock Universal properties of infrared oscillator basis extrapolations
doi: 10.1103/PhysRevC.87.044326
2012DU04 Phys.Rev. C 85, 034330 (2012) Ab initio approach to effective single-particle energies in doubly closed shell nuclei NUCLEAR STRUCTURE 16,22,24,28O, 40,48,52,54,60Ca; calculated one-neutron effective single-particle energies, one-neutron removal energies and spectroscopic factors. Coupled-cluster calculations. Consistent structure and reaction models.
doi: 10.1103/PhysRevC.85.034330
2012FU08 Phys.Rev. C 86, 031301 (2012) R.J.Furnstahl, G.Hagen, T.Papenbrock Corrections to nuclear energies and radii in finite oscillator spaces NUCLEAR STRUCTURE 6He, 16O; calculated ground-state energies, nuclear radii. Finite oscillator basis space. Halo nuclei. Comparison with other theoretical calculations.
doi: 10.1103/PhysRevC.86.031301
2012HA19 Phys.Rev.Lett. 108, 242501 (2012) G.Hagen, M.Hjorth-Jensen, G.R.Jansen, R.Machleidt, T.Papenbrock Continuum Effects and Three-Nucleon Forces in Neutron-Rich Oxygen Isotopes NUCLEAR STRUCTURE 18,22,23,24O; calculated level energies, J, π, point matter and charge radii, 24O long-lived resonances. Chiral effective field interaction, comparison with available data.
doi: 10.1103/PhysRevLett.108.242501
2012HA26 Phys.Rev.Lett. 109, 032502 (2012) G.Hagen, M.Hjorth-Jensen, G.R.Jansen, R.Machleidt, T.Papenbrock Evolution of Shell Structure in Neutron-Rich Calcium Isotopes NUCLEAR STRUCTURE 42,48,50,52,53,54,55,56,61Ca, 50,54,56Ti; calculated ground state energies, J, π. Chiral effective field theory, comparison with available data.
doi: 10.1103/PhysRevLett.109.032502
2012HA29 Phys.Rev. C 86, 021602 (2012) Elastic proton scattering of medium mass nuclei from coupled-cluster theory NUCLEAR REACTIONS 40Ca(p, p), E(cm)=9.6, 12.44 MeV; calculated scattering s-wave functions, radial overlap function between g.s. of 40Ca and states in 41Sc, differential σ(θ, E), phase shifts. Coupled-cluster theory with interactions from chiral effective field theory. Comparison with experimental data.
doi: 10.1103/PhysRevC.86.021602
2012HA37 Prog.Theor.Phys.(Kyoto), Suppl. 196, 102 (2012) Computational Aspects of Nuclear Coupled-Cluster Theory NUCLEAR STRUCTURE 40Ca; calculated ground state energy.
doi: 10.1143/PTPS.196.102
2012PI12 Phys.Rev. C 86, 014308 (2012) D.A.Pigg, G.Hagen, H.Nam, T.Papenbrock Time-dependent coupled-cluster method for atomic nuclei NUCLEAR STRUCTURE 4He, 18O; calculated energy spectra, time-dependent observables which commute with the Hamiltonian under time evolution. Role of the similarity-transformed Hamiltonian under real and imaginary-time evolution. Time-dependent coupled-cluster (TDCC) theory based on Kvaal's bi-variational formulation.
doi: 10.1103/PhysRevC.86.014308
2011JA06 Phys.Rev. C 83, 054306 (2011) G.R.Jansen, M.Hjorth-Jensen, G.Hagen, T.Papenbrock Toward open-shell nuclei with coupled-cluster theory NUCLEAR STRUCTURE 3,4,5,6He; calculated ground-state energies, first 2+ state energy in 6He, expectation value of total angular Momentum. Method based on equation-of-motion coupled-cluster theory.
doi: 10.1103/PhysRevC.83.054306
2011JE02 Phys.Rev. C 83, 021305 (2011) O.Jensen, G.Hagen, M.Hjorth-Jensen, J.S.Vaagen Closed-shell properties of 24O with ab initio coupled-cluster theory NUCLEAR STRUCTURE 23O, 23Ne; calculated single-particle levels, J, π. 24O; calculated neutron- and proton-removal spectroscopic factors for hole states in 24O. Coupled-cluster method with chiral nucleon-nucleon N3L interaction including role of continuum states. Comparison with experimental data.
doi: 10.1103/PhysRevC.83.021305
2011JE03 Phys.Rev.Lett. 107, 032501 (2011) O.Jensen, G.Hagen, M.Hjorth-Jensen, B.A.Brown, A.Gade Quenching of Spectroscopic Factors for Proton Removal in Oxygen Isotopes NUCLEAR STRUCTURE 14,16,22,24,28O; calculated radial overlap functions, spectroscopic factors. Hartree-Fock built from Woods-Saxon single-particle basis.
doi: 10.1103/PhysRevLett.107.032501
2011KA36 Phys.Rev. C 84, 061304 (2011) R.Kanungo, A.Prochazka, M.Uchida, W.Horiuchi, G.Hagen, T.Papenbrock, C.Nociforo, T.Aumann, D.Boutin, D.Cortina-Gil, B.Davids, M.Diakaki, F.Farinon, H.Geissel, R.Gernhauser, J.Gerl, R.Janik, O.Jensen, B.Jonson, B.Kindler, R.Knobel, R.Krucken, M.Lantz, H.Lenske, Y.Litvinov, B.Lommel, K.Mahata, P.Maierbeck, A.Musumarra, T.Nilsson, C.Perro, C.Scheidenberger, B.Sitar, P.Strmen, B.Sun, Y.Suzuki, I.Szarka, I.Tanihata, H.Weick, M.Winkler Exploring the anomaly in the interaction cross section and matter radius of 23O NUCLEAR REACTIONS C(22O, X), (23O, X), [22O, 23O secondary beams from 9Be(48Ca, X), E=1 GeV/nucleon primary reaction], E=900 MeV/nucleon; measured energy loss, time of flight, magnetic rigidity. 22,23O; deduced interaction cross section, matter radii, neutron skin thickness. Glauber model analysis. Comparison with ab initio coupled-cluster theory.
doi: 10.1103/PhysRevC.84.061304
2010HA11 Phys.Rev.Lett. 104, 182501 (2010) G.Hagen, T.Papenbrock, M.Hjorth-Jensen Ab Initio Computation of the 17F Proton Halo State and Resonances in A=17 Nuclei NUCLEAR STRUCTURE 17O, 17F; calculated energies of proton halo states, J, π. deduced continuum effect binding energy yields.
doi: 10.1103/PhysRevLett.104.182501
2010HA22 Phys.Rev. C 82, 034330 (2010) G.Hagen, T.Papenbrock, D.J.Dean, M.Hjorth-Jensen Ab initio coupled-cluster approach to nuclear structure with modern nucleon-nucleon interactions NUCLEAR STRUCTURE 4He, 16,17,22,24,25,28O, 16,22,24,25,28F, 40,48Ca; calculated ground-state energies, rms radii, single-particle energies, and binding energies. Coupled-cluster model with bare and secondary renormalized nucleon-nucleon interactions. Comparison with experimental data.
doi: 10.1103/PhysRevC.82.034330
2010JE03 Phys.Rev. C 82, 014310 (2010) O.Jensen, G.Hagen, T.Papenbrock, D.J.Dean, J.S.Vaagen Computation of spectroscopic factors with the coupled-cluster method NUCLEAR STRUCTURE 15N, 15,16O; calculated ground-state energies, spectroscopic factors for removal of proton and neutron from 16O using coupled-cluster theory and equation of motion.
doi: 10.1103/PhysRevC.82.014310
2009BA61 Eur.Phys.J. A 42, 553 (2009) S.Bacca, A.Schwenk, G.Hagen, T.Papenbrock Helium halo nuclei from low-momentum interactions NUCLEAR STRUCTURE 4,6,8He; calculated ground-state energies. Comparison with data.
doi: 10.1140/epja/i2009-10815-5
2009EN01 Phys.Rev. C 79, 064317 (2009) Corrections to the neutrinoless double-β-decay operator in the shell model RADIOACTIVITY 82Se(2β-); calculated matrix elements for neutrinoless double beta decay using shell-model and Bonn-C nucleon-nucleon interaction.
doi: 10.1103/PhysRevC.79.064317
2009HA20 Phys.Rev.Lett. 103, 062503 (2009) G.Hagen, T.Papenbrock, D.J.Dean Solution of the Center-Of-Mass Problem in Nuclear Structure Calculations NUCLEAR STRUCTURE 4He, 16O; calculated nuclear wave function as a product of intrinsic and center-of-mass in a sufficiently large model space.
doi: 10.1103/PhysRevLett.103.062503
2009HA26 Phys.Rev. C 80, 021306 (2009) G.Hagen, T.Papenbrock, D.J.Dean, M.Hjorth-Jensen, B.Velamur Asokan Ab initio computation of neutron-rich oxygen isotopes NUCLEAR STRUCTURE 16,22,24,28O; calculated ground-state energies, binding energies and rms point matter radii using ab initio calculations with the coupled-cluster model and chiral nucleon-nucleon interaction N3LO. Comparison with experimental data.
doi: 10.1103/PhysRevC.80.021306
2009TS08 Phys.Rev. C 80, 051301 (2009) K.Tsukiyama, M.Hjorth-Jensen, G.Hagen Gamow shell-model calculations of drip-line oxygen isotopes NUCLEAR STRUCTURE 24,25O; calculated low-lying levels and resonant states using Gamow Shell Model calculations. Discussed nuclear stability. Comparison with experimental data.
doi: 10.1103/PhysRevC.80.051301
2008BA29 Phys.Rev. C 78, 014318 (2008) A.Baran, A.Bulgac, M.McNeil Forbes, G.Hagen, W.Nazarewicz, N.Schunck, M.V.Stoitsov Broyden's method in nuclear structure calculations
doi: 10.1103/PhysRevC.78.014318
2008HA30 Phys.Rev.Lett. 101, 092502 (2008) G.Hagen, T.Papenbrock, D.J.Dean, M.Hjorth-Jensen Medium-Mass Nuclei from Chiral Nucleon-Nucleon Interactions NUCLEAR STRUCTURE 4He, 16O, 40Ca, 48Ca, 48Ni; calculated binding energies, radii and densities; spherical coupled-cluster theory; bare chiral NN-interaction;
doi: 10.1103/PhysRevLett.101.092502
2007HA33 Phys.Rev. C 76, 034302 (2007) G.Hagen, T.Papenbrock, D.J.Dean, A.Schwenk, A.Nogga, M.Wloch, P.Piecuch Coupled-cluster theory for three-body Hamiltonians
doi: 10.1103/PhysRevC.76.034302
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