NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = K.Kravvaris Found 20 matches. 2023HE08 J.Phys.(London) G50, 060501 (2023) C.Hebborn, F.M.Nunes, G.Potel, W.H.Dickhoff, J.W.Holt, M.C.Atkinson, R.B.Baker, C.Barbieri, G.Blanchon, M.Burrows, R.Capote, P.Danielewicz, M.Dupuis, C.Elster, J.E.Escher, L.Hlophe, A.Idini, H.Jayatissa, B.P.Kay, K.Kravvaris, J.J.Manfredi, A.Mercenne, B.Morillon, G.Perdikakis, C.D.Pruitt, G.H.Sargsyan, I.J.Thompson, M.Vorabbi, T.R.Whitehead Optical potentials for the rare-isotope beam era
doi: 10.1088/1361-6471/acc348
2023HL01 Phys.Rev. C 107, 014315 (2023) L.Hlophe, K.Kravvaris, S.Quaglioni Quantifying uncertainties due to irreducible three-body forces in deuteron-nucleus reactions NUCLEAR REACTIONS 2H(α, α), E(cm)<1.8 MeV; calculated elastic scattering σ(θ, E), phase shifts. Ab initio no-core shell model coupled with the resonating group method (NCSM/RGM) and Faddeev type equations. Studied the irreducible n-p-α three-body forces arising from antisymmetrization effects and quantified its impact on observables of the d+α system. Comparison to available experimental data. NUCLEAR STRUCTURE 2H, 4He, 6Li; calculated ground-state energy. Comparison of Faddeev calculations with no-core shell model coupled with the resonating group method (NCSM/RGM).
doi: 10.1103/PhysRevC.107.014315
2023KR09 Phys.Lett. B 845, 138156 (2023) K.Kravvaris, P.Navratil, S.Quaglioni, C.Hebborn, G.Hupin Ab initio informed evaluation of the radiative capture of protons on 7Be NUCLEAR REACTIONS 7Be(p, γ), E(cm)<10 MeV; analyzed available data; deduced eigenphase shifts, S-factors using a set of first-principle (or, ab initio) calculations to provide an independent prediction of the low-energy S-factor with quantified uncertainties.
doi: 10.1016/j.physletb.2023.138156
2022AT02 Phys.Rev. C 105, 054316 (2022) M.C.Atkinson, P.Navratil, G.Hupin, K.Kravvaris, S.Quaglioni Ab initio calculation of the β decay from 11Be to a 10Be + p resonance RADIOACTIVITY 11Be(β-p); calculated β-delayed proton emission branching ratio, Gamow-teller transitions strength. Ab-initio no-core shell model with continuum (NCSMC). Comparison to experimental data. NUCLEAR STRUCTURE 11Be, 11B; calculated levels, J, π, diagonal phase and eigenphase shifts in 10Be+p system, spectroscopic factors, resonances. Comparison to experimental data.
doi: 10.1103/PhysRevC.105.054316
2022HE12 Phys.Rev.Lett. 129, 042503 (2022) C.Hebborn, G.Hupin, K.Kravvaris, S.Quaglioni, P.Navratil, P.Gysbers Ab Initio Prediction of the 4He(d, γ)6Li Big Bang Radiative Capture NUCLEAR REACTIONS 4He(d, γ)6Li, E<1 MeV; calculated S-factor, thermonuclear reaction rates, ground-state properties. The ab initio no-core shell model with continuum. Comparison with available data.
doi: 10.1103/PhysRevLett.129.042503
2022RU04 Eur.Phys.J. A 58, 107 (2022) E.Rubino, S.L.Tabor, V.Tripathi, R.S.Lubna, B.Abromeit, J.M.Allmond, L.T.Baby, D.D.Caussyn, K.Kravvaris, A.Volya Multiparticle-hole excitations in nuclei near N = Z = 20: 41K NUCLEAR REACTIONS 26Mg(18O, 2np), (18O, 3n), E=50 MeV; measured reaction products, Eγ, Iγ. 41K, 41Ca; deduced γ-ray energies and relative intensities, high-spin states, level scheme, J, π. Comparison with spsdpf cross-shell FSU shell model interaction calculations. The Florida State University (FSU) John D. Fox Superconducting Linear Accelerator Laboratory. The FSU high-purity germanium detector array.
doi: 10.1140/epja/s10050-022-00755-1
2021CH45 Phys.Rev. C 104, 024325 (2021) R.J.Charity, T.B.Webb, J.M.Elson, D.E.M.Hoff, C.D.Pruitt, L.G.Sobotka, P.Navratil, G.Hupin, K.Kravvaris, S.Quaglioni, K.W.Brown, G.Cerizza, J.Estee, W.G.Lynch, J.Manfredi, P.Morfouace, C.Santamaria, S.Sweany, M.B.Tsang, T.Tsang, K.Zhu, S.A.Kuvin, D.McNeel, J.Smith, A.H.Wuosmaa, Z.Chajecki Using spin alignment of inelastically excited nuclei in fast beams to assign spins: The spectroscopy of 13O as a test case NUCLEAR REACTIONS 9Be(13O, 13O'), E=69.5 MeV/nucleon, [secondary 13O beam from 9Be(16O, X), E=150 MeV/nucleon primary reaction, followed by separation of fragments using A1900 fragment separator at NSCL-MSU facility]; measured charged particles, angular distribution of protons in 1p- and 2p-decays of the excited states of 13O using High Resolution Array (HiRA) of 14 ΔE-E (Si-CsI(Tl)) telescopes; deduced invariant-mass distributions of the p+12N and 2p+11C events from the decay of 13O excited states. 13O; deduced levels, resonances, J, π, Γ, E(p), possibly rotational bands built on deformed cluster configurations predicted by antisymmetrized molecular dynamics (AMD) calculations. Comparison of p(θ) data with DWBA using FRESCO code, and level structure of 13O with ab initio no-core shell model with continuum (NCSMC), and with the structure of 13B mirror nucleus.
doi: 10.1103/PhysRevC.104.024325
2020KR08 Phys.Rev. C 102, 024616 (2020) K.Kravvaris, K.R.Quinlan, S.Quaglioni, K.A.Wendt, P.Navratil Quantifying uncertainties in neutron-α scattering with chiral nucleon-nucleon and three-nucleon forces NUCLEAR REACTIONS 4He(n, n), (n, X)5He*, E(cm)<10.5 MeV; calculated phase shifts from third to fifth order of the chiral expansion in comparison to the empirical phase shifts obtained from R-matrix analysis of A=5 reaction data, phase shifts from the Gaussian process model (GPM) with local/nonlocal 3N force, Bayesian posterior distributions of low-energy constants for the contact plus one-pion exchange using the binding energies of 3H and 4He and the charge radius of 4He, positions and widths of n-α resonances. 4,5He; calculated ground-state energy, point-proton radius and charge radius, and associated chiral uncertainties using the chiral interaction models. Computation of structure and reaction observables for three-, four-, and five-nucleon systems within the ab initio frameworks of the no-core shell model and no-core shell model with continuum. Overall uncertainty budget of many-body calculations using Bayesian statistics. Comparison with experimental data.
doi: 10.1103/PhysRevC.102.024616
2019AB05 Phys.Rev. C 100, 014310 (2019) B.Abromeit, S.L.Tabor, V.Tripathi, R.S.Lubna, D.Caussyn, R.Dungan, K.Kravvaris, E.Rubino, P.-L.Tai, A.Volya High spin structure of 39Ar and the FSU cross-shell interaction NUCLEAR REACTIONS 27Al(14C, np), E=25.6 MeV; measured Eγ, Iγ, Ep, Ip, γγ- and pγ-coin, γγ(θ)(DCO) using Compton suppressed FSU γ detector array and silicon ΔE-E telescope for proton detection at Florida State University FN tandem accelerator facility. 39Ar; deduced levels, J, π. Comparison with shell model calculations using the FSU cross-shell interaction, and with previous experimental results. 38Ar(d, p)39Ar; calculated spectroscopic factors using the shell model with the FSU cross-shell interaction, and compared with available experimental results. NUCLEAR STRUCTURE 38,39Ar; calculated levels, J, π using shell model with the FSU cross-shell interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.100.014310
2019AB06 Phys.Rev. C 100, 014323 (2019) B.Abromeit, V.Tripathi, H.L.Crawford, S.N.Liddick, S.Yoshida, Y.Utsuno, P.C.Bender, B.P.Crider, R.Dungan, P.Fallon, K.Kravvaris, N.Larson, R.S.Lubna, T.Otsuka, C.J.Prokop, A.L.Richard, N.Shimizu, S.L.Tabor, A.Volya Β- decay of Tz = +11/2 isotopes 37Al and 39Si: Understanding Gamow-Teller strength distribution in neutron-rich nuclei RADIOACTIVITY 37Al, 37,39,40Si, 37,39P(β-)[from 9Be(48Ca, X), E=140 MeV/nucleon, followed by fragment separation using A1900 separator at NSCL-MSU]; 37Al, 39Si(β-n); measured β, Eγ, Iγ, βγ-coin, half-lives of decays of 37Al, 37Si and 39Si, %β-n for decays of 37Al and 39Si using β-counting system (BCS) at NSCL-MSU which consisted of silicon PIN detectors, segmented planar Ge double-sided strip detector (GeDSSD) for implants and β- detection, and an array of 16 segmented Ge detectors for γ rays. 36Si, 37Si, 37,39,40P, 37,39S; deduced levels, J, π, β feedings, logft, %β-n. Systematics of low-lying positive π states in 35,37,39P, and T1/2 in N=20-28 Si isotopes. Comparison with shell model calculations. NUCLEAR STRUCTURE 35,37,39P, 37,39S, 37Si; calculated levels, J, π, logft values. Shell model calculations using the SDPFSDG-MU interaction. Comparison with experimental data from the present experiment, and the evaluated data in the ENSDF database at NNDC.
doi: 10.1103/PhysRevC.100.014323
2019KR12 Phys.Rev. C 100, 034321 (2019) Clustering in structure and reactions using configuration interaction techniques NUCLEAR STRUCTURE 8Be, 12C, 16O, 20,21Ne; calculated spectroscopic factors for ground state to ground state α transitions, proton and alpha spectroscopic factors for the lowest T=0 states, B(E2) and α spectroscopic factors for rotational band members in 20Ne, low-lying states, rotational bands and spectroscopic factors in 21Ne, 12C and 8Be, n+α, p+α and α+α phase shifts. New configuration-interaction based method for clustering mechanism within the traditional shell model and its algebraic limits, together with resonating group method (RGM) for calculating low-lying states for different scattering channels. Comparison with available experimental data.
doi: 10.1103/PhysRevC.100.034321
2019LU11 Phys.Rev. C 100, 034308 (2019) R.S.Lubna, K.Kravvaris, S.L.Tabor, V.Tripathi, A.Volya, E.Rubino, J.M.Allmond, B.Abromeit, L.T.Baby, T.C.Hensley Structure of 38Cl and the quest for a comprehensive shell model interaction NUCLEAR REACTIONS 26Mg(14C, np)38Cl, E=30, 37 MeV; measured Eγ, Iγ, Ep, Ip, γγ- and pγ-coin, γγ(θ)(DCO), γ-polarization asymmetry using enriched target, FSU array of three Clover HPGe detectors and three single-crystal Ge detectors for γ detection, and ΔE-E telescope for particles at FSU Tandem accelerator. 38Cl; deduced levels, J, π, multipolarities, configurations. Comparison with shell-model calculations using the FSU effective interaction for the spsdfp space.24Mg, 38Ar; deduced polarization asymmetries and multipolarities for two γ rays in each nucleus. NUCLEAR STRUCTURE 33P, 34,36,38Cl; calculated levels, J, π, intruder states, theoretical Occupancies, spectroscopic factors, level half-lives for 38Cl, occupation number of πf7/2 and νf7/2 orbitals. Z=6-23, A=13-51; analyzed and fitted energy levels for 74 nuclei to develop the FSU interaction. Shell-model calculations using the FSU effective interaction for the spsdfp model space. Comparison with experimental data.
doi: 10.1103/PhysRevC.100.034308
2019WE12 Phys.Rev. C 100, 024604 (2019) W.D.Weintraub, N.Keeley, K.W.Kemper, K.Kravvaris, F.Marechal, D.Robson, B.T.Roeder, K.Rusek, A.Volya Analyzing powers and the role of multistep processes in the 12C(7Li, t)16O reaction NUCLEAR REACTIONS 12C(7Li, t), (polarized 7Li, t)16O, E=34 MeV; measured E(t), I(t), σ(θ), T10, T20 and T30 analyzing powers using two ΔE-E telescopes of Si detectors at the FSU tandem accelerator facility. 16O; deduced levels, J, π; calculated Sα spectroscopic amplitudes and relative angular momentum for the various components of the 16O=α+12C radial wave functions from the shell model calculations. Coupled channel Born approximation (CCBA) and DWBA analyses of σ(θ) and analyzing power data.
doi: 10.1103/PhysRevC.100.024604
2018LU08 Phys.Rev. C 97, 044312 (2018) R.S.Lubna, V.Tripathi, S.L.Tabor, P.-L.Tai, K.Kravvaris, P.C.Bender, A.Volya, M.Bouhelal, C.J.Chiara, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, E.A.McCutchan, S.Zhu, R.M.Clark, P.Fallon, A.O.Macchiavelli, S.Paschalis, M.Petri, W.Reviol, D.G.Sarantites Intruder configurations of excited states in the neutron-rich isotopes 33P and 34P NUCLEAR REACTIONS 18O(18O, 2np), (18O, np), E=24 MeV; measured Eγ, Iγ, γ(θ), γγ-, pγ-coin using Gammasphere array for γ detection, and 4π Microball scintillator array for charged particle detection at ATLAS-ANL facility. 33,34P; deduced levels, J, π, configurations. Comparison with shell-model calculations using PSDPF interaction. NUCLEAR STRUCTURE 31,32,33,34,35P; calculated levels, J, π using shell-model with the PSDPF interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.97.044312
2017KR04 Phys.Rev.Lett. 119, 062501 (2017) Study of Nuclear Clustering from an Ab Initio Perspective NUCLEAR STRUCTURE 8,10Be, 12C; calculated absolute values of spectroscopic amplitudes and channel norms, 3 α clustering.
doi: 10.1103/PhysRevLett.119.062501
2017TA18 Phys.Rev. C 96, 014323 (2017) P.-L.Tai, S.L.Tabor, R.S.Lubna, K.Kravvaris, P.C.Bender, V.Tripathi, A.Volya, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, E.A.McCutchan, S.Zhu, R.M.Clark, P.Fallon, S.Paschalis, M.Petri, A.O.Macchiavelli, W.Reviol, D.G.Sarantites Cross-shell excitations in 31Si NUCLEAR REACTIONS 18O(18O, nα)31Si, E=24 MeV; measured Eα, Eγ, Iγ, γγ-, αγ-coin using Gammasphere and Microball detector arrays at ATLAS-ANL facility. 31Si; deduced levels, J, π, configurations, radiative decays from neutron-unbound levels. Comparison with resonances observed previously in 30Si(n, n) reaction, and with shell-model calculations using USDA and WBP cross-shell interactions. NUCLEAR STRUCTURE 29,31,33Si; calculated levels, J, π using shell model with the WBP-b interaction. Comparison with experimental data. 30Si(d, p)31Si; calculated single-neutron spectroscopic factors using the USDA (WBP-b) interaction, and compared with experimental data.
doi: 10.1103/PhysRevC.96.014323
2017TR02 Phys.Rev. C 95, 024308 (2017) V.Tripathi, R.S.Lubna, B.Abromeit, H.L.Crawford, S.N.Liddick, Y.Utsuno, P.C.Bender, B.P.Crider, R.Dungan, P.Fallon, K.Kravvaris, N.Larson, A.O.Macchiavelli, T.Otsuka, C.J.Prokop, A.L.Richard, N.Shimizu, S.L.Tabor, A.Volya, S.Yoshida β decay of 38, 40Si (Tz =+5, +6) to low-lying core excited states in odd-odd 38-40P isotopes RADIOACTIVITY 38,40Si(β-), (β-n)[from 9Be(48Ca, X), E=140 MeV/nucleon using A1900 separator at NSCL-MSU facility]; measured Eγ, Iγ, Eβ, γγ-coin, β-correlated γ spectra, half-lives and delayed-neutron probabilities (Pn) of decays of 38Si and 40Si using planar germanium double-sided strip detector (GeDSSD) and SeGA array. 38,40P; deduced levels, J, π, β feedings log ft values. Comparison with known experimental level schemes of 34 and 36P, and with shell model calculations using SDPF-MU interaction. 36,38,40Si(β-); calculated half-lives and log ft values of decays of Si isotopes, beta-delayed neutron probabilities (Pn) using shell model, and compared with experimental values. NUCLEAR STRUCTURE 34,36,38,40P; calculated levels, J, π, proton and neutron occupancies for the ground state and the three excited 1+ states, Gamow-Teller matrix elements for the 1+ states. Shell model calculations with SDPF-MU interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.95.024308
2016DU02 Phys.Rev. C 93, 021302 (2016) R.Dungan, S.L.Tabor, V.Tripathi, A.Volya, K.Kravvaris, B.Abromeit, D.D.Caussyn, S.Morrow, J.J.Parker, P.-L.Tai, J.M.VonMoss Radiative decay of neutron-unbound intruder states in 19O NUCLEAR REACTIONS 9Be(14C, α)19O, E=30, 35 MeV; measured Eγ, Iγ, αγ-, αγγ-coin using Compton suppressed Ge detector for γ rays and Si ΔE-E telescope for α particles at FSU John D. Fox Superconducting Laboratory. 19O; deduced levels, states above S(n), J, π. Comparison with shell model calculations in the 0p-0d-1s model space using the psdu interaction. Discussed competition between electromagnetic and neutron emission from unbound states, and comparison with an experimental neutron resonance yield curve from 18O(n, γ). Level systematics of 17,19,21O. NUCLEAR STRUCTURE 19O; calculated levels, J, π, Γn, Γγ, spectroscopic factors. Shell model calculations using the psdu interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.93.021302
2016DU24 Phys.Rev. C 94, 064305 (2016) R.Dungan, S.L.Tabor, R.S.Lubna, A.Volya, V.Tripathi, B.Abromeit, D.D.Caussyn, K.Kravvaris, P.-L.Tai High-spin states in 29Al and 27Mg NUCLEAR REACTIONS 18O(14C, 2np), (14C, nα), E=40 MeV; measured proton and α spectra using ΔE-E telescope, Eγ, Iγ, pγγ-, αγγ-coin using Florida State University Compton suppressed γ-detector array. 27Mg, 29Al; deduced levels, J, π. Comparison with shell model calculations using USDA interaction. NUCLEAR STRUCTURE 27Mg, 29Al; calculated levels, J, π, occupancies of 1s-0d orbitals, neutron decay widths for low- and high-spin unbound states, spectroscopic factors. Shell-model calculations using the USDA interaction, and the WBP-a interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.94.064305
2015VO12 Phys.Rev. C 92, 034301 (2015) J.M.VonMoss, S.L.Tabor, V.Tripathi, A.Volya, B.Abromeit, P.C.Bender, D.D.Caussyn, R.Dungan, K.Kravvaris, M.P.Kuchera, R.Lubna, S.Miller, J.J.Parker, P.-L.Tai Higher-spin structures in 21F and 25Na NUCLEAR REACTIONS 9Be(14C, np), E=30, 35, 45 MeV; 9Be(18O, np), E=35 MeV; measured Ep, Ip, Eγ, Iγ, pγ-, γγ-coin, γ(θ), level half-lives by DSAM using ΔE-E telescopes for particles and Compton-suppressed Ge detectors for γ rays at FSU tandem accelerator. 21F, 25Na; deduced levels, J, π, multipolarity, B(M1), B(E1), B(E2). Comparison with previous experimental data, and with shell model calculations using USDA and WBP interactions. NUCLEAR STRUCTURE 21F, 25Na; calculated levels, J, π, B(M1), B(E1), B(E2) using shell model with USDA and WBP interactions. Comparison with experimental data.
doi: 10.1103/PhysRevC.92.034301
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