NSR Query Results
Output year order : Descending NSR database version of March 18, 2024. Search: Author = L.G.Sobotka Found 199 matches. Showing 1 to 100. [Next]2023CH22 Phys.Rev. C 107, 054301 (2023) R.J.Charity, K.Brown, T.Webb, L.G.Sobotka Invariant-mass spectroscopy of 10B, 11C, 14F, 16F, and 18Na NUCLEAR REACTIONS 9Be(15O, X)16F/18Na/11C/10B, E=48.1 MeV/nucleon; 9Be(17Ne, X)16F/18Na/11C/10B, E=48.1 MeV/nucleon; measured charged particle spectra, angular distributions, Eγ, Iγ, γ(θ), (particle)γ-coin; deduced invariant mass-spectrum. 9Be(13O, X)14F/11C/10B, E=69.5 MeV/nucleon; measured charged particles, (particle)(particle)-coin; deduced invariant mass-spectrum. 16,14F, 18Na; deduced levels, J, π, S(p), proton-decay widths, nγ-decay widths, d-wave resonances spectroscopic factors. 10B; deduced levels, J, π, 4+ state - member of T=1 rotational band. 11C; deduced levels, J, π from analysis of invariant-mass spectrum of 2α+3He and 6Li+α+p events. Comparison to previous experimental data and shell-model calculations. Systematics of analog rotational bands in 10C, 10B and 10Be. High-resolution array (HiRA) consisting of 14 Si-CsI(Tl) at NSCL (MSU). For the experiments with 15O and 17Ne beams setup was extended by CAESAR (CAESium iodide ARray) consisted of 158 CsI(Na) crystals.
doi: 10.1103/PhysRevC.107.054301
2023CH46 Phys.Rev.Lett. 131, 172501 (2023) R.J.Charity, J.Wylie, S.M.Wang, T.B.Webb, K.W.Brown, G.Cerizza, Z.Chajecki, J.M.Elson, J.Estee, D.E.M.Hoff, S.A.Kuvin, W.G.Lynch, J.Manfredi, N.Michel, D.G.McNeel, P.Morfouace, W.Nazarewicz, C.D.Pruitt, C.Santamaria, S.Sweany, J.Smith, L.G.Sobotka, M.B.Tsang, A.H.Wuosmaa Strong Evidence for 9N and the Limits of Existence of Atomic Nuclei RADIOACTIVITY 9N(p), 8C, 6Be(2p) [from 9Be(13O, X)9N, E=69.5 MeV/nucleon]; measured decay products, Ep, Ip. 9N, 8C; deduced invariant-mass spectra, level diagrams, possible single resonancelike peak in the spectrum. R-matrix fits, comparison with the theoretical predictions of an open-quantum-system approach. The National Superconducting Cyclotron Laboratory at Michigan State University.
doi: 10.1103/PhysRevLett.131.172501
2023CH47 Phys.Rev. C 108, 044318 (2023) Invariant-mass spectroscopy in projectile fragmentation reactions
doi: 10.1103/PhysRevC.108.044318
2023DR01 Phys.Rev. C 107, 034306 (2023) N.Dronchi, D.Weisshaar, B.A.Brown, A.Gade, R.J.Charity, L.G.Sobotka, K.W.Brown, W.Reviol, D.Bazin, P.J.Farris, A.M.Hill, J.Li, B.Longfellow, D.Rhodes, S.N.Paneru, S.A.Gillespie, A.Anthony, E.Rubino, S.Biswas Measurement of the B(E2 ↑) strengths of 36Ca and 38Ca NUCLEAR REACTIONS 197Au(36Ca, 36Ca), E=76.9 MeV/nucleon; 197Au(38Ca, 38Ca), E=69.1 MeV/nucleon; 197Au(34Ar, 34Ar), E not given; measured reaction products, Eγ, Iγ; deduced σ and B(E2) for the excitation of the first 2+ (34Ar was present as contamination). 36Ca; deduced proton decay branching ratio for 2 state proton unbound state, spectroscopic factors, charge radii difference with mirror nuclei 36S. 35K(p, γ), T=0.5-2 GK; deduced reaction rate using obtained in this paper values for the 36Ca B(E2) and proton branching ratio. GRETINA HPGe array and the S800 spectrograph used to measure the γ-decay following Coulomb excitation. CAESAR CsI(Na) array and the S800 spectrograph used to measure the p/γ- branching ratio in 36Ca. Systematics of first 2+ states energy and B(E2) for Ca isotopes. Beam produced from fragmentation reaction 9Be(40Ca, X), E=140 MeV/nucleon at Coupled Cyclotron Facility (NSCL). NUCLEAR STRUCTURE 36,38,40,42,44,46,48,50Ca, 36S, 38Ar; calculated energy of first 2+ state, B(E2) for the excitation of first 2+ state. Shell model calculations with ZBM2, USDB, spdfu-mix and GXPF1A interactions. Comparison to experimental data.
doi: 10.1103/PhysRevC.107.034306
2023DR02 Phys.Rev. C 107, L061303 (2023) N.Dronchi, J.Berkman, R.J.Charity, J.M.Elson, L.G.Sobotka, A.G.Thomas, A.Saastamoinen, M.Barbui, J.Bishop, C.E.Parker, B.T.Roeder, G.V.Rogachev, D.P.Scriven, S.T.Marley, R.M.Shaffer Search for an s-wave resonance in 7Li just above the proton-decay threshold NUCLEAR REACTIONS 2H(6He, n)7Li, E=6.4 MeV/nucleon; measured charged particles from 7Li excited states decay; deduced invariant mass, resonances. 6,7Li, 8Be; deduced energies and widths of the states. Charged particles identified with array of 4 Si-Si telescopes from HIRA array. Secondary beam produced from 7Li(d, 3He)6He reaction at K150 cyclotron (Texas AM University Cyclotron Institute).
doi: 10.1103/PhysRevC.107.L061303
2023EL04 Phys.Lett. B 844, 138072 (2023) Z.Elekes, V.Panin, T.R.Rodriguez, K.Sieja, D.S.Ahn, A.Al-Adili, H.Baba, A.I.Stefanescu, K.J.Cook, Cs.Dosa, N.Fukuda, J.Gao, J.Gibelin, K.I.Hahn, Z.Halasz, S.W.Huang, T.Isobe, M.M.Juhasz, D.Kim, T.Kobayashi, Y.Kondo, Z.Korkulu, A.Kurihara, I.Kuti, H.Miki, K.Miki, T.Motobayashi, H.Otsu, A.Saastamoinen, M.Sasano, H.Sato, T.Shimada, Y.Shimizu, L.G.Sobotka, I.Stefanescu, L.Stuhl, H.Suzuki, H.Takeda, Y.Togano, T.Tomai, L.Trache, D.Tudor, T.Uesaka, Y.Utsuki, H.Wang, A.Yasuda, K.Yoneda, Y.Yoshitome Shape coexistence in 66Se NUCLEAR REACTIONS 12C(67Se, n)66Se, E=170-250 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies and relative intensities, γ-ray production σ, J, π, partial level scheme, shape coexistence. Comparison with theoretical calculations. The CATANA array, Radioactive Isotope Beam Factory operated by the RIKEN Nishina Center and by the Center for Nuclear Study of the University of Tokyo.
doi: 10.1016/j.physletb.2023.138072
2022CH02 Phys.Rev. C 105, 014314 (2022) R.J.Charity, L.G.Sobotka, T.B.Webb, K.W.Brown Two-proton decay from α-cluster states in 10C and 11N NUCLEAR STRUCTURE 10C, 11N; analyzed 2p+2α for 10C and 3p+2α exit channels for two-proton decay and highly fragmented decay channels using invariant-mass data from four previous experiments at NSCL-MSU, and Texas A and M facility involving inelastic scattering, multinucleon knockout, and neutron-pickup reactions; deduced a number of democratic 2p emitters associated with α-cluster structure, Correlation plots for the two-proton decay of the second 3/2- state in 11N and second 0+ state in 10C. 10C; deduced levels, J, π, α-cluster states, rotational band built on the second 0+ (Hoyle) state with α-cluster molecular structure, prompt 2p decay from excited states, decay channels and their branching ratios, compared with level structure of mirror nucleus 10Be. 11N; deduced levels, J, π, Γ, molecular band built on the second 3/2- state, decaying by 2p-channel, compared with level structure of mirror nucleus 11Be. Discussed possible 2n-decay of neutron-rich cluster configurations.
doi: 10.1103/PhysRevC.105.014314
2022GI04 Phys.Rev. C 105, 044321 (2022) S.A.Gillespie, K.W.Brown, R.J.Charity, L.G.Sobotka, A.K.Anthony, J.Barney, A.Bonaccorso, B.A.Brown, J.Crosby, D.Dell'Aquila, J.Elson, J.Estee, A.Gade, M.Ghazali, G.Jhang, Y.Jin, B.Longfellow, W.G.Lynch, J.Pereira, M.Spieker, S.Sweany, F.C.E.Teh, A.Thomas, M.B.Tsang, C.Y.Tsang, D.Weisshaar, H.Y.Wu, K.Zhu Proton decay spectroscopy of 28S and 30Cl NUCLEAR REACTIONS 9Be(29S, n), (31Ar, p), E=150 MeV/nucleon; measured reaction products, Ep, Ip, Eγ, Iγ, (particle)p-coin, pγ-coin; deduced invariant mass, momentum distribution. Setup consisting of S800 spectrograph, Si-CsI(Tl) DSSD array of 128 concentric rings and 128 annular sectors, CAESAR CsI(Na) photon detection array, BC-400-type scintillation fiber detector at A1900 fragment separator (NSCL). RADIOACTIVITY 28S(p), (2p) [from 9Be(29S, n), E=150 MeV/nucleon]; 30Cl(p), (2p) [from 9Be(29S, n), E=150 MeV/nucleon]; measured Ep, Ip, Eγ, Iγ, pγ-coin; deduced total decay kinetic energy, decay energy spectrum. 30Cl; deduced levels, J, π, S(p). 28S; deduced levels, J, π, spectroscopic factors. Comparison to previous experimental results and shell model calculations.
doi: 10.1103/PhysRevC.105.044321
2022ST07 Eur.Phys.J. A 58, 223 (2022) A.I.Stefanescu, V.Panin, L.Trache, T.Motobayashi, H.Otsu, A.Saastamoinen, T.Uesaka, L.Stuhl, J.Tanaka, D.Tudor, I.C.Stefanescu, A.E.Spiridon, K.Yoneda, H.Baba, M.Kurokawa, Y.Togano, Z.Halasz, M.Sasano, S.Ota, Y.Kubota, D.S.Ahn, T.Kobayashi, Z.Elekes, N.Fukuda, H.Takeda, D.Kim, E.Takada, H.Suzuki, K.Yoshida, Y.Shimizu, H.N.Liu, Y.L.Sun, T.Isobe, J.Gibelin, P.J.Li, J.Zenihiro, F.M.Marques, M.N.Harakeh, G.G.Kiss, A.Kurihara, M.Yasuda, T.Nakamura, S.Park, Z.Yang, T.Harada, M.Nishimura, H.Sato, I.S.Hahn, K.Y.Chae, J.M.Elson, L.G.Sobotka, C.A.Bertulani Silicon tracker array for RIB experiments at SAMURAI
doi: 10.1140/epja/s10050-022-00873-w
2022WA33 J.Phys.(London) G49, 10LT02 (2022) S.M.Wang, W.Nazarewicz, R.J.Charity, L.G.Sobotka Nucleon-nucleon correlations in the extreme oxygen isotopes RADIOACTIVITY 11,12O(2p), 26O(2n); calculated density distributions of two-nucleon decays, asymptotic energy and angular correlations of protons and neutrons, Jacobi-Y correlations of two protons emitted from the broad low-energy structure, two-neutron decay of threshold resonance in 26O. The Gamow coupled-channel (GCC) method.
doi: 10.1088/1361-6471/ac888f
2021BI06 Phys.Rev. C 103, L051303 (2021) J.Bishop, G.V.Rogachev, S.Ahn, E.Aboud, M.Barbui, A.Bosh, J.Hooker, C.Hunt, H.Jayatissa, E.Koshchiy, R.Malecek, S.T.Marley, M.Munch, E.C.Pollacco, C.D.Pruitt, B.T.Roeder, A.Saastamoinen, L.G.Sobotka, S.Upadhyayula Evidence against the Efimov effect in 12C from spectroscopy and astrophysics RADIOACTIVITY 12N(β+); 12B(β-); measured β-delayed charged particles, Eα, Iα from the decay of 40-MeV 12N beam stopped inside the active-area of the TexAT (Texas Active target) TPC (Time Projection Chamber), Eγ, Iγ, γγ-coin from the decay of 12B using Gammasphere array at ANL. 12C; deduced no evidence for an hypothetical state predicted by Efimov effect at 7.458 MeV from a combined analysis of the two experiments involving charged-particle spectroscopy at Texas A and M, and γ-ray measurements at ANL, along with astrophysical rate calculations. Relevance to rate required for stars to undergo the red giant phase.
doi: 10.1103/PhysRevC.103.L051303
2021CH19 Phys.Rev.Lett. 126, 132501 (2021) R.J.Charity, T.B.Webb, J.M.Elson, D.E.M.Hoff, C.D.Pruitt, L.G.Sobotka, K.W.Brown, G.Cerizza, J.Estee, W.G.Lynch, J.Manfredi, P.Morfouace, C.Santamaria, S.Sweany, C.Y.Tsang, M.B.Tsang, Y.Zhang, K.Zhu, S.A.Kuvin, D.McNeel, J.Smith, A.H.Wuosmaa, Z.Chajecki Observation of the Exotic Isotope 13F Located Four Neutrons beyond the Proton Drip Line NUCLEAR REACTIONS 9Be(13O, 13F), E=69.5 MeV/nucleon; measured reaction products, Ep, Ip. 13F, 12O, 11N, 10C, 9B, 8Be; deduced 13F resonance parameters, energy levels, J, π, level decays via initial proton emissions.
doi: 10.1103/PhysRevLett.126.132501
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
2021CH54 Phys.Rev. C 104, 054307 (2021) R.J.Charity, T.B.Webb, L.G.Sobotka, K.W.Brown Spectroscopy of 10N with the invariant-mass method NUCLEAR REACTIONS 9Be(13O, 10N), E=65.4 MeV/nucleon; 9Be(9C, 10N), E=68 MeV/nucleon; measured charged particles, p(9C)-coin using the High Resolution Array (HiRA) of 14 ΔE-E (Si-CsI(Tl)) telescopes at NSCL-MSU facility; deduced invariant-mass distributions of the p+9C produced following knockout of one proton and two neutrons from 13O, and from one proton pickup from 9C, decay-energy distributions obtained from p+9C coincidences in the two experiments, with contamination from p+10C, p+11C and 2p+9C events. 10N; deduced level, resonance, L-value, J, π, Γ using R-matrix analysis. Comparison of resonance energy and width with theoretical models, and with predictions from complex scaling and Gamow shell model calculations.
doi: 10.1103/PhysRevC.104.054307
2021JI15 Phys.Rev.Lett. 127, 262502 (2021) Y.Jin, C.Y.Niu, K.W.Brown, Z.H.Li, H.Hua, A.K.Anthony, J.Barney, R.J.Charity, J.Crosby, D.Dell'Aquila, J.M.Elson, J.Estee, M.Ghazali, G.Jhang, J.G.Li, W.G.Lynch, N.Michel, L.G.Sobotka, S.Sweany, F.C.E.Teh, A.Thomas, C.Y.Tsang, M.B.Tsang, S.M.Wang, H.Y.Wu, C.X.Yuan, K.Zhu First Observation of the Four-Proton Unbound Nucleus 18Mg RADIOACTIVITY 18Mg(14O), (2p), (4p) [from 9Be(20Mg, X)18Mg, E=170 MeV/nucleon]; measured decay products, Ep, Ip, 18Mg, 16Ne; deduced decay energy spectra, level scheme, J, π, resonance parameters. Comparison with the Gamow shell model (GSM) calculations.
doi: 10.1103/PhysRevLett.127.262502
2021MA55 Phys.Rev. C 104, 024608 (2021) J.Manfredi, J.Lee, A.M.Rogers, M.B.Tsang, W.G.Lynch, C.Anderson, J.Barney, K.W.Brown, B.Brophy, G.Cerizza, Z.Chajecki, G.Chen, J.Elson, J.Estee, H.Iwasaki, C.Langer, Z.Li, C.Loelius, C.Y.Niu, C.Pruitt, H.Setiawan, R.Showalter, K.Smith, L.G.Sobotka, S.Sweany, S.Tangwancharoen, J.R.Winkelbauer, Z.Xiao, Z.Xu Quenching of single-particle strengths in direct reactions NUCLEAR REACTIONS 1H(46Ar, d)45Ar, (34Ar, d)33Ar, E=70 MeV/nucleon; measured heavy reaction residues, outgoing E(d), I(d), (reaction residues)δ-coin, differential σ(θ) using High Resolution Array (HiRA) for deuterons and S800 spectrograph for residue products at NSCL-MSU facility, CH2 target; deduced spectroscopic factors and reduction factors for the final states, asymmetry dependence of reduction factors. Comparison with results of previous measurements, and theoretical calculations using large-basis shell model (LBSM). Relevance to single-nucleon knockout reactions.
doi: 10.1103/PhysRevC.104.024608
2020BI11 Phys.Rev. C 102, 041303 (2020) J.Bishop, G.V.Rogachev, S.Ahn, E.Aboud, M.Barbui, A.Bosh, C.Hunt, H.Jayatissa, E.Koshchiy, R.Malecek, S.T.Marley, E.C.Pollacco, C.D.Pruitt, B.T.Roeder, A.Saastamoinen, L.G.Sobotka, S.Upadhyayula Almost medium-free measurement of the Hoyle state direct-decay component with a TPC RADIOACTIVITY 12N(β+), (β+α)[from 3He(10B, 12N), E=11 MeV/nucleon at K500 cyclotron at the Cyclotron Institute at Texas A and M University, followed by isotopic separation using Momentum Achromatic Recoil Spectrometer]; measured β-delayed charged-particles using Texas active target time-projection chamber (TPC). 12C; deduced upper limit for the nonsequential component of the decay of the excited 0+, Hoyle state in an almost medium-free reaction. Comparison with previous experimental results, and with predictions from Faddeev calculations.
doi: 10.1103/PhysRevC.102.041303
2020BI15 Nucl.Instrum.Methods Phys.Res. A964, 163773 (2020) J.Bishop, G.V.Rogachev, S.Ahn, E.Aboud, M.Barbui, P.Baron, A.Bosh, E.Delagnes, J.Hooker, C.Hunt, H.Jayatissa, E.Koshchiy, R.Malecek, S.T.Marley, R.O'Dwyer, E.C.Pollacco, C.Pruitt, B.T.Roeder, A.Saastamoinen, L.G.Sobotka, S.Upadhyayula Beta-delayed charged-particle spectroscopy using TexAT RADIOACTIVITY 12N(IT), (EC), 12C(3α), 8Be(2α) [from 3He(10B, n)12N, E=11 MeV/nucleon]; measured decay products, Eα, Iα; deduced branching ratio of 12N to states in 12C above the 3-α threshold, the total branching ratio to the Hoyle state, 12N T1/2 using the β-delayed charged-particle-decay. Comparison with available data.
doi: 10.1016/j.nima.2020.163773
2020CH41 Phys.Rev. C 102, 044614 (2020) R.J.Charity, L.G.Sobotka, J.A.Tostevin Single-nucleon knockout cross sections for reactions producing resonance states at or beyond the drip line NUCLEAR REACTIONS 9Be(9C, 8B)p, (9C, 8C)n, E≈66.8 MeV/nucleon; 9Be(13O, 12N)p, (13O, 12O)n, E=65.4 MeV/nucleon; 9Be(17Ne, 16Ne)n, E=58.2 MeV/nucleon; analyzed experiments performed at NSCL-MSU using HiRA array of 14 Si-CsI(Tl) E-ΔE telescopes, and reported in 2010Ch42, 2011Ch32 and 2014Br15 publications for 9C beam, in 2019We11 for 13O beam, and in 2014Br19, 2018Ch25 and 2019Ch16 for 17Ne beam; deduced single-nucleon knockout cross sections and spectroscopic factors with emphasis on the production of resonance states in the residual nuclei, identified by their invariant mass, and resonances with two-, three-, and five-body exit channels. Comparison with eikonal-model predictions using spectroscopic factors from shell-model or variational Monte Carlo method. 9Be(13O, 12O)n, E=28.2 MeV/nucleon; analyzed experimental data from Texas A and M University Cyclotron facility, and reported in 2012Ja11 publication, for dependence of knockout cross sections on incident beam energy. 8B, 12N, 16Ne; deduced levels, resonances, J, π, isospin, widths, decay modes of resonances.
doi: 10.1103/PhysRevC.102.044614
2020PR09 Phys.Rev.Lett. 125, 102501 (2020) C.D.Pruitt, R.J.Charity, L.G.Sobotka, M.C.Atkinson, W.H.Dickhoff Systematic Matter and Binding-Energy Distributions from a Dispersive Optical Model Analysis NUCLEAR STRUCTURE 16,18O, 40,48Ca, 58,64Ni, 112,124Sn, 208Pb; analyzed available bound-state anscattering data; deduced neutronn skins, the interplay of asymmetry, Coulomb, and shell effects on the skin thickness.
doi: 10.1103/PhysRevLett.125.102501
2020PR10 Phys.Rev. C 102, 034601 (2020) C.D.Pruitt, R.J.Charity, L.G.Sobotka, J.M.Elson, D.E.M.Hoff, K.W.Brown, M.C.Atkinson, W.H.Dickhoff, H.Y.Lee, M.Devlin, N.Fotiades, S.Mosby Isotopically resolved neutron total cross sections at intermediate energies NUCLEAR REACTIONS 16,18O, 58,64Ni, 103Rh, 112,124Sn(n, X), E=3-450 MeV; measured E(n), I(n), σ(E) by time-of-flight using wave-form-digitizer technology and BC-400 fast plastic scintillators at the WNR facility of the Los Alamos Neutron Science Center; deduced spectroscopic factors for valence proton and neutron levels through a dispersive optical model (DOM) analyses of σ(θ) data. 16,18O, 58,64Ni, 103Rh, 112,124Sn(p, p), (polarized p, p), (n, n), E=10-200 MeV; analyzed experimental σ(E), σ(θ, E), Ay(θ, E) data in literature; deduced dispersive optical model (DOM) parameters, charge radii and binding energies. Comparison with previous experimental measurements of σ(E) using analog methods.
doi: 10.1103/PhysRevC.102.034601
2020WE08 Phys.Rev. C 101, 044317 (2020) T.B.Webb, R.J.Charity, J.M.Elson, D.E.M.Hoff, C.D.Pruitt, L.G.Sobotka, K.W.Brown, J.Barney, G.Cerizza, J.Estee, W.G.Lynch, J.Manfredi, P.Morfouace, C.Santamaria, S.Sweany, M.B.Tsang, T.Tsang, Y.Zhang, K.Zhu, S.A.Kuvin, D.McNeel, J.Smith, A.H.Wuosmaa, Z.Chajecki Invariant-mass spectrum of 11O NUCLEAR REACTIONS 9Be(13O, 11O), E=69.5 MeV/nucleon; measured Ep, Ip, and invariant mass spectrum of 11O fragments from (9C)2p-coin events with two-proton emission from two states in 11O, longitudinal-momentum distributions using the HiRA array at NSCL-MSU facility. 11O; deduced levels, S(2p) for ground state.
doi: 10.1103/PhysRevC.101.044317
2019CH16 Phys.Rev. C 99, 044304 (2019) R.J.Charity, K.W.Brown, J.Elson, W.Reviol, L.G.Sobotka, W.W.Buhro, Z.Chajecki, W.G.Lynch, J.Manfredi, R.Shane, R.H.Showalter, M.B.Tsang, D.Weisshaar, J.Winkelbauer, S.Bedoor, D.G.McNeel, A.H.Wuosmaa Invariant-mass spectroscopy of 18Ne 16O, and 10C excited states formed in neutron-transfer reactions NUCLEAR REACTIONS 9Be(17Ne, X), E=58.2 MeV/nucleon;9Be(15O, X), E=48.1 MeV/nucleon, [secondary 17Ne and 15O beams from 9Be(20Ne, X), E=170 MeV primary reaction]; 9Be(9C, X), E=64.6 MeV/nucleon, [secondary 9C beam from 9Be(16O, X), E=150 MeV primary reaction]; measured charged particle spectra, σ(θ), Eγ, Iγ, γ(θ), (particle)γ-coin, excitation-energy spectra with invariant-mass method, center-of-mass velocity distributions, invariant-mass spectroscopy for neutron transfer reactions using the HiRA ΔE-E telescope array for charged particle detection and the CAESAR array for γ detection at NSCL-MSU facility. 10C, 16O, 18Ne; deduced levels, J, π, widths, branching ratios of high-lying states, and IMM fits for A=18 Comparison with theoretical predictions, and with previous experimental results.
doi: 10.1103/PhysRevC.99.044304
2019CH50 Phys.Rev. C 100, 064305 (2019) R.J.Charity, K.W.Brown, J.Okolowicz, M.Ploszajczak, J.M.Elson, W.Reviol, L.G.Sobotka, W.W.Buhro, Z.Chajecki, W.G.Lynch, J.Manfredi, R.Shane, R.H.Showalter, M.B.Tsang, D.Weisshaar, J.R.Winkelbauer, S.Bedoor, A.H.Wuosmaa Invariant-mass spectroscopy of 14O excited states NUCLEAR REACTIONS 9Be(15O, 14O), E=52.1 MeV/nucleon, [secondary 15O beam from 9Be(20Ne, X)15O/17Ne, E=150 MeV/nucleon]; measured reaction products, Eγ, Iγ, (particle)γ-coin using HiRA array for particle detection and CAESAR array for γ rays at the NSCL-MSU facility. 14O; deduced levels, resonances, Jπ, Γ, cross sections and branching ratios for different one-proton and 2-proton emitting channels from excited states in 14O, configuration mixing in resonance spectra. 13N, 12C; deduced levels from 1-proton and 2-proton emissions from excited states in 14O. Comparison with shell model calculations embedded in the continuum (SMEC), treating bound and scattering states in a unified model.
doi: 10.1103/PhysRevC.100.064305
2019WA16 Phys.Rev. C 99, 054302 (2019) S.M.Wang, W.Nazarewicz, R.J.Charity, L.G.Sobotka Structure and decay of the extremely proton-rich nuclei 11, 12O NUCLEAR STRUCTURE 10,11N, 11,12O, 11Li, 12Be; calculated levels, J, π, 2p partial decay width of 12O. 11O, 11Li, 12Be, 12O; calculated levels, J, π, two-proton widths and configurations for mirror nuclei. 12C; calculated two-proton angular correlation. 6Be, 12O; calculated 2p density distributions. 11O, 11Li; calculated angular correlations between the valence nucleons in ground and excited states. 10N, 11O; calculated trajectories of the threshold resonances. Deformed core+nucleon+nucleon Gamow coupled channel (GCC) method. Comparison with experimental data. RADIOACTIVITY 6Be, 11,12O(2p); calculated 2p density distributions, decay widths. Deformed core+nucleon+nucleon Gamow coupled channel (GCC) method.
doi: 10.1103/PhysRevC.99.054302
2019WE03 Phys.Rev.Lett. 122, 122501 (2019) T.B.Webb, S.M.Wang, K.W.Brown, R.J.Charity, J.M.Elson, J.Barney, G.Cerizza, Z.Chajecki, J.Estee, D.E.M.Hoff, S.A.Kuvin, W.G.Lynch, J.Manfredi, D.McNeel, P.Morfouace, W.Nazarewicz, C.D.Pruitt, C.Santamaria, J.Smith, L.G.Sobotka, S.Sweany, C.Y.Tsang, M.B.Tsang, A.H.Wuosmaa, Y.Zhang, K.Zhu first Observation of Unbound 11O, the Mirror of the Halo Nucleus 11Li RADIOACTIVITY 11,12O(2p) [from 9Be(13O, xn)11O/12O, E<69.5 MeV/nucleon]; measured decay products, Ep, Ip; deduced an invariant-mass spectrum, resonant state widths, two-nucleon density distributions. Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.122.122501
2019WE11 Phys.Rev. C 100, 024306 (2019); Erratum Phys.Rev. C 102, 019904 (2020) T.B.Webb, R.J.Charity, J.M.Elson, D.E.M.Hoff, C.D.Pruitt, L.G.Sobotka, K.W.Brown, J.Barney, G.Cerizza, J.Estee, G.Jhang, W.G.Lynch, J.Manfredi, P.Morfouace, C.Santamaria, S.Sweany, M.B.Tsang, T.Tsang, S.M.Wang, Y.Zhang, K.Zhu, S.A.Kuvin, D.McNeel, J.Smith, A.H.Wuosmaa, Z.Chajecki Particle decays of levels in 11, 12N and 12O investigated with the invariant-mass method NUCLEAR REACTIONS 9Be(13O, 12O), (13O, 12N), (13O, 11N), E=69.5 MeV/nucleon, [secondary 13O beam from 9Be(16O, 12O), E=150 MeV/nucleon primary reaction, followed by separation of ion beam using A1900 magnetic separator]; measured charged particles, (particle)(particle)-coin, cross sections using the High Resolution Array (HiRA) of 14 ΔE-E Si-CsI(Tl) telescopes at NSCL, MSU facility. 12,13O, 12N; deduced levels, J, π, 2p-, 3p-, 1p- and 2p+α-decay branches, p+10C, p+11C, 2p+10C invariance mass spectra, widths, total decay energy spectrum and invariant-mass spectra from coincident 4p+2α events. Comparison with Gamow coupled-channel (GCC) calculations, and with previous experimental data in the ENSDF database.
doi: 10.1103/PhysRevC.100.024306
2018CH25 Phys.Rev. C 97, 054318 (2018) R.J.Charity, K.W.Brown, J.Okolowicz, M.Ploszajczak, J.M.Elson, W.Reviol, L.G.Sobotka, W.W.Buhro, Z.Chajecki, W.G.Lynch, J.Manfredi, R.Shane, R.H.Showalter, M.B.Tsang, D.Weisshaar, J.R.Winkelbauer, S.Bedoor, A.H.Wuosmaa Spin alignment following inelastic scattering of 17Ne, lifetime of 16F, and its constraint on the continuum coupling strength NUCLEAR REACTIONS 9Be(17Ne, 17Ne'), E=62.9 MeV/nucleon [17Ne secondary beam from 150 MeV/nucleon 16O primary beam]; measured reaction products, Ep and Ip(θ) of first and second protons in sequential two-proton decay of the second excited state of Jπ=5/2- in 17Ne using the High Resolution Array (HiRA) at NSCL-MSU. 17Ne; deduced excitation-energy spectra reconstructed from 2p+15O events from excited state of 17Ne, magnetic substate probability distribution, distribution of the relative emission angle between the sequential protons, and spin alignment of 17Ne excited state. 16F; deduced invariant mass spectra, widths of the first 0-, 1-, 2-, and 3- resonances, and compared with calculations using shell model embedded in the continuum (SMEC). RADIOACTIVITY 16F(p)[from proton decay of excited state in 17Ne]; deduced width of the ground state from magnitude of the final-state interactions between the protons emitted by the excited state of 17Ne. Comparison with previous direct measurement of the width of the ground state.
doi: 10.1103/PhysRevC.97.054318
2018HO06 Phys.Rev. C 97, 054605 (2018) D.E.M.Hoff, G.Potel, K.W.Brown, R.J.Charity, C.D.Pruitt, L.G.Sobotka, T.B.Webb, B.Roeder, A.Saastamoinen Large longitudinal spin alignment generated in inelastic nuclear reactions NUCLEAR REACTIONS 9Be, 12C, 27Al(7Li, 7Li'), E=24.0 MeV/nucleon; measured breakup fragments of 7Li, excitation energy distributions, and efficiency-corrected angular correlations, differential σ(θ) at Texas A and M K-500 Cyclotron facility; deduced magnetic substate distribution, and presence of large longitudinal spin alignment in inelastically excited 7Li. Comparison with α+t DWBA cluster-model calculations.
doi: 10.1103/PhysRevC.97.054605
2018OK02 Phys.Rev. C 97, 044303 (2018) J.Okolowicz, M.Ploszajczak, R.J.Charity, L.G.Sobotka Collectivization of anti-analog strength above charged particle thresholds NUCLEAR REACTIONS 1H, C(12Be, 9Li), (12Be, 10Be), E=50 MeV/nucleon, [12Be secondary beam from 9Be(18O, X), E=120 MeV/nucleon]; measured charged particle spectra, (particle)(particle)-coin, angular correlations using HiRA array at NSCL-MSU facility. 9Li, 10Be; deduced levels, resonances, J, π, widths, strongly mixed excited states of lower isospin (T<) mediated by open neutron channels. Comparison with calculations using shell model embedded in the continuum (SMEC). Full details of the experiment available in 2008Ch28 paper.
doi: 10.1103/PhysRevC.97.044303
2017BR07 Phys.Rev. C 95, 044326 (2017) K.W.Brown, R.J.Charity, J.M.Elson, W.Reviol, L.G.Sobotka, W.W.Buhro, Z.Chajecki, W.G.Lynch, J.Manfredi, R.Shane, R.H.Showalter, M.B.Tsang, D.Weisshaar, J.R.Winkelbauer, S.Bedoor, A.H.Wuosmaa Proton-decaying states in light nuclei and the first observation of 17Na NUCLEAR REACTIONS 9Be(17Ne, 17Na), (17Ne, 17Ne), (17Ne, 16F), E=58 MeV/nucleon, [secondary 17Ne beam from 9Be(20Ne, X), E=170 MeV/nucleon primary reaction at NSCL-MSU accelerator facility]; 9Be(9C, 9C), (9C, 9B), (9C, 8B), E=68 MeV/nucleon, [secondary 9C beam from 9Be(16O, X), E=150 MeV/nucleon primary reaction]; measured charged-particle reaction products using HiRA array of 14 ΔE-E telescopes, and γ rays by CAESAR array of 158 CsI(Na), (particle)γ-coin; analyzed invariant mass spectra, R-matrix fits. 17Na, 17Ne, 16F, 9C, 8,9B; deduced levels, upper limit of mass for 17Na, proton unbound levels, widths, J, π, three-proton decay of 17Na, one- and two-proton decay branches of other nuclei. First identification of unbound 17Na nucleus.
doi: 10.1103/PhysRevC.95.044326
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
2017HO26 Phys.Rev.Lett. 119, 232501 (2017) D.E.M.Hoff, R.J.Charity, K.W.Brown, C.D.Pruitt, L.G.Sobotka, T.B.Webb, G.Potel, B.Roeder, A.Saastamoinen Large Longitudinal Spin Alignment of Excited Projectiles in Intermediate Energy Inelastic Scattering NUCLEAR REACTIONS 9Be, C, 27Al(7Li, X), E=24 MeV/nucleon; measured projectile sequential breakup products. 7Li; deduced for peripheral events that do not excite the target large spin alignment of the excited projectiles longitudinal to the beam axis.
doi: 10.1103/PhysRevLett.119.232501
2017WU03 Phys.Rev. C 95, 014310 (2017) A.H.Wuosmaa, S.Bedoor, K.W.Brown, W.W.Buhro, Z.Chajecki, R.J.Charity, W.G.Lynch, J.Manfredi, S.T.Marley, D.G.McNeel, A.S.Newton, D.V.Shetty, R.H.Showalter, L.G.Sobotka, M.B.Tsang, J.R.Winkelbauer, R.B.Wiringa Ground-state properties of 5H from the 6He (d, 3He) 5H reaction NUCLEAR REACTIONS 2H(6He, 3He), (6He, t), E=55 MeV/nucleon, [secondary 6He beam from 9Be(18O, X), E=120 MeV/nucleon and using A1900 fragment separator at NSCL-MSU facility]; measured particle identification (PID) spectra, kinetic-energy spectra of low-energy 3He and 3H particles using High Resolution Array (HiRA) of charged-particle-detector telescopes and CsI(Tl) scintillator crystals; deduced correlations between E(3He) and E(3H), and E(3H) and E(4He), Q-value dependence of cross sections from DWBA calculations, 3H recoil-energy distributions from the decay of 5H, beam-like recoils and two-neutron correlations. 5H, 5He; deduced energies and widths of resonances corresponding to the ground state. Comparison with previous experimental results, shell-model and ab initio nuclear-structure calculations. COMPILATION 5H; compiled theoretical and previous (1968-2005) experiments for identification, and results of resonance energy and width of ground-state resonance of 5H.
doi: 10.1103/PhysRevC.95.014310
2015BR11 Phys.Rev. C 92, 034329 (2015) K.W.Brown, R.J.Charity, L.G.Sobotka, L.V.Grigorenko, T.A.Golubkova, S.Bedoor, W.W.Buhro, Z.Chajecki, J.M.Elson, W.G.Lynch, J.Manfredi, D.G.McNeel, W.Reviol, R.Shane, R.H.Showalter, M.B.Tsang, J.R.Winkelbauer, A.H.Wuosmaa Interplay between sequential and prompt two-proton decay from the first excited state of 16Ne NUCLEAR REACTIONS 9Be(17Ne, 16Ne), E=57.6 MeV/nucleon; analyzed results of experimental measurements reported in their 2014Br19 work carried out at NSCL-MSU. 16Ne; analyzed relative energy spectra and few-body correlations of 14O+2p and 13N+3p events; deduced level energies and widths of g.s. and first 2+ state from kinematic analysis of 14O+p+p events, and those of higher levels from analysis of the 13N+p+p+p events. Sequential and diprotonlike decays deduced from correlation pattern reproduced in three-body 14O+p+p calculations. 15F, 14O, 13N; deduced levels, J, π from particle decays of states in 16Ne.
doi: 10.1103/PhysRevC.92.034329
2015CH12 Phys.Rev. C 91, 024610 (2015) R.J.Charity, J.M.Elson, J.Manfredi, R.Shane, L.G.Sobotka, Z.Chajecki, D.Coupland, H.Iwasaki, M.Kilburn, Jenny Lee, W.G.Lynch, A.Sanetullaev, M.B.Tsang, J.Winkelbauer, M.Youngs, S.T.Marley, D.V.Shetty, A.H.Wuosmaa Spin alignment of excited projectiles due to target spin-flip interactions NUCLEAR REACTIONS 9Be(6Li, X), E=36.6 MeV/nucleon; 9Be(7Be, X), E=65.2 MeV/nucleon, [6Li, 7Be secondary beams from 9Be(16O, X), E=150 MeV/nucleon primary reaction]; measured particle spectra, angular distributions of reaction products using HiRA array of ΔE-E telescopes at NSCL-MSU facility; deduced sequential breakup of projectiles, spin alignments, and molecular structure of 9Be.
doi: 10.1103/PhysRevC.91.024610
2014BR15 Phys.Rev. C 90, 027304 (2014) K.W.Brown, W.W.Buhro, R.J.Charity, J.M.Elson, W.Reviol, L.G.Sobotka, Z.Chajecki, W.G.Lynch, J.Manfredi, R.Shane, R.H.Showalter, M.B.Tsang, D.Weisshaar, J.R.Winkelbauer, S.Bedoor, A.H.Wuosmaa Two-proton decay from the isobaric analog state in 8B NUCLEAR REACTIONS 9Be(9C, 8B), E=68 MeV/nucleon, [9C secondary beam from 9Be(16O, X), E=150 MeV/nucleon primary fragmentation reaction]; measured Ep, Ip, 6Li-p-p correlated events from IAS of 8C g.s. in 8B by analyzing complete kinematics of 2p+6Li decay products, gamma decay of IAS in 6Li; deduced isospin-allowed 2p decay between isobaric analog states, three-body energy and angular correlations, branching ratios. Experiments carried out at NSCL-MSU facility using A1900 fragment separator and High Resolution Array of Si-CsI(Tl) telescopes.
doi: 10.1103/PhysRevC.90.027304
2014BR19 Phys.Rev.Lett. 113, 232501 (2014) K.W.Brown, R.J.Charity, L.G.Sobotka, Z.Chajecki, L.V.Grigorenko, I.A.Egorova, Yu.L.Parfenova, M.V.Zhukov, S.Bedoor, W.W.Buhro, J.M.Elson, W.G.Lynch, J.Manfredi, D.G.McNeel, W.Reviol, R.Shane, R.H.Showalter, M.B.Tsang, J.R.Winkelbauer, A.H.Wuosmaa Observation of Long-Range Three-Body Coulomb Effects in the Decay of 16Ne RADIOACTIVITY 16Ne(2p) [from Be(17Ne, X), E=57.6 MeV/nucleon]; measured decay products, Ep, Ip; deduced resonance width limit, correlations between the momenta of the three decay products, dependence on the long-range nature of the Coulomb interaction. Comparison with theoretical calculations, available data.
doi: 10.1103/PhysRevLett.113.232501
2014CH08 Eur.Phys.J. A 50, 23 (2014), Erratum Eur.Phys.J. A 50, 64 (2014) R.J.Charity, W.H.Dickhoff, L.G.Sobotka, S.J.Waldecker Isospin dependence of nucleon correlations in ground-state nuclei NUCLEAR STRUCTURE 102,106,112,124,130,132Sn; calculated proton orbit strength function, spectroscopic factor. 154Sn; calculated proton hole spectroscopic factor. 132Sn, 208Pb; calculated neutron states above the core, spectroscopic factor. Dispersive optical model.
doi: 10.1140/epja/i2014-14023-0
2014MB02 Sci. Rep. 4, 6706 (2014) T.Mastren, A.Pen, G.F.Peaslee, N.Wozniak, S.Loveless, S.Essenmacher, L.G.Sobotka, D.J.Morrissey, S.E.Lapi Feasibility of Isotope Harvesting at a Projectile Fragmentation Facility: 67Cu NUCLEAR REACTIONS H, O(67Cu, X), E=76 MeV/nucleon; measured reaction products; deduced the radiochemical yields. A proof-of-principle experiment, the National Superconducting Cyclotron Laboratory (NSCL).
doi: 10.1038/srep06706
2014SA46 Phys.Lett. B 736, 137 (2014) A.Sanetullaev, M.B.Tsang, W.G.Lynch, Jenny Lee, D.Bazin, K.P.Chan, D.Coupland, V.Henzl, D.Henzlova, M.Kilburn, A.M.Rogers, Z.Y.Sun, M.Youngs, R.J.Charity, L.G.Sobotka, M.Famiano, S.Hudan, D.Shapira, W.A.Peters, C.Barbieri, M.Hjorth-Jensen, M.Horoi, T.Otsuka, T.Suzuki, Y.Utsuno Neutron spectroscopic factors of 55Ni hole-states from image transfer reactions NUCLEAR REACTIONS 1H(56Ni, d), E=37 MeV/nucleon; measured reaction products; deduced spectroscopic factors, J, π, σ(θ). Comparison with shell model calculations.
doi: 10.1016/j.physletb.2014.07.003
2013LU10 Phys.Rev. C 88, 017604 (2013) F.Lu, J.Lee, M.B.Tsang, D.Bazin, D.Coupland, V.Henzl, D.Henzlova, M.Kilburn, W.G.Lynch, A.M.Rogers, A.Sanetullaev, Z.Y.Sun, M.Youngs, R.J.Charity, L.G.Sobotka, M.Famiano, S.Hudan, M.Horoi, Y.L.Ye Neutron-hole states in 45Ar from 1H(46Ar, d)45Ar reactions NUCLEAR REACTIONS 1H(46Ar, d), E=33 MeV/nucleon; measured E(d), I(d), σ(θ). Radioactive secondary beam of 46Ar produced in the Coupled Cyclotron facility at NSCL. 45Ar; deduced levels, J, π, L-transfer, spectroscopic factors. ADWA analysis. Comparison with spectroscopic factors determined in 2H(44Ar, p)45Ar reaction, and with shell-model calculations.
doi: 10.1103/PhysRevC.88.017604
2013SO11 Phys.Rev. C 87, 054329 (2013) L.G.Sobotka, W.W.Buhro, R.J.Charity, J.M.Elson, M.F.Jager, J.Manfredi, M.H.Mahzoon, A.M.Mukhamedzhanov, V.Eremenko, M.McCleskey, R.G.Pizzone, B.T.Roeder, A.Spiridon, E.Simmons, L.Trache, M.Kurokawa, P.Navratil Proton decay of excited states in 12N and 13O and the astrophysical 11C(p, γ)12N reaction rate NUCLEAR REACTIONS 9Be(13O, X), E=30.3 MeV/nucleon, [13O secondary beam from 1H(14N, X), E=38 MeV/nucleon primary reaction]; measured particle spectra, E(p), I(p), widths using MARS spectrometer at Texas AM cyclotron facility. Invariant mass method. R-matrix analysis. 11C, 12N, 13O; deduced levels, J, π, one-proton and two-proton decay branching ratios. 11C(p, γ)12N; deduced astrophysical reaction rates and S(E) factors.
doi: 10.1103/PhysRevC.87.054329
2012CH40 Phys.Rev. C 86, 041307 (2012) R.J.Charity, L.G.Sobotka, K.Hagino, D.Bazin, M.A.Famiano, A.Gade, S.Hudan, S.A.Komarov, Jenny Lee, S.P.Lobastov, S.M.Lukyanov, W.G.Lynch, C.Metelko, M.Mocko, A.M.Rogers, H.Sagawa, A.Sanetullaev, M.B.Tsang, M.S.Wallace, M.J.van Goethem, A.H.Wuosmaa Double isobaric analog of 11Li in 11B NUCLEAR REACTIONS 1H(12Be, 11B), E=50 MeV/nucleon; analyzed decay products, excitation energy via 2p+9Li events, mass excess. 11B; deduced level, J, π, width, double isobaric analog state of the two-neutron-halo system 11Lig.s.. Discussed T=5/2 isospin sextet using the isobaric multiplet mass equation.
doi: 10.1103/PhysRevC.86.041307
2012DI04 Phys.Rev. C 85, 034311 (2012) E.S.Diffenderfer, L.T.Baby, D.Santiago-Gonzalez, N.Ahsan, A.Rojas, A.Volya, I.Wiedenhover, A.H.Wuosmaa, M.P.Carpenter, R.V.F.Janssens, C.J.Lister, M.Devlin, D.G.Sarantites, L.G.Sobotka, Y.Utsuno, M.Horoi High-spin spectrum of 24Mg studied through multiparticle angular correlations NUCLEAR REACTIONS 12C(16O, α)24Mg, E=62, 68 MeV; measured Eα, Iα, αγ-coin, αγ(θ), αγγ(θ) using Gammasphere array. Experiments carried out at ANL and FSU facilities. 24Mg; deduced levels, J, π, configurations. Comparison with previous studies and shell model calculations.
doi: 10.1103/PhysRevC.85.034311
2012EG03 Phys.Rev.Lett. 109, 202502 (2012) I.A.Egorova, R.J.Charity, L.V.Grigorenko, Z.Chajecki, D.Coupland, J.M.Elson, T.K.Ghosh, M.E.Howard, H.Iwasaki, M.Kilburn, Jenny Lee, W.G.Lynch, J.Manfredi, S.T.Marley, A.Sanetullaev, R.Shane, D.V.Shetty, L.G.Sobotka, M.B.Tsang, J.Winkelbauer, A.H.Wuosmaa, M.Youngs, M.V.Zhukov Democratic Decay of 6Be Exposed by Correlations NUCLEAR REACTIONS Be(7Be, X)6Be, E=70 MeV/nucleon; measured reaction products, Eα, Iα, Ep, Ip; deduced three-body energy-angular correlations, three-body democratic decay. Comparison with a three-cluster-model calculations.
doi: 10.1103/PhysRevLett.109.202502
2012HE03 Phys.Rev. C 85, 014606 (2012) V.Henzl, M.A.Kilburn, Z.Chajecki, D.Henzlova, W.G.Lynch, D.Brown, A.Chbihi, D.D.S.Coupland, P.Danielewicz, R.T.deSouza, M.Famiano, C.Herlitzius, S.Hudan, J.Lee, S.Lukyanov, A.M.Rogers, A.Sanetullaev, L.G.Sobotka, Z.Y.Sun, M.B.Tsang, A.Vander Molen, G.Verde, M.S.Wallace, M.Youngs Angular dependence in proton-proton correlation functions in central 40Ca+40Ca and 48Ca+48Ca reactions NUCLEAR REACTIONS 40Ca(40Ca, X), 48Ca(48Ca, X), E=80 MeV/nucleon; measured proton spectra, proton-proton angular correlation functions using HiRA and 4π arrays at the NSCL facility; deduced angular momentum dependence on reconstructed source distribution by imaging method, and Gaussian fitting procedure. Comparison with Boltzmann-Uehling-Uhlenbeck (BUU) transport model simulations.
doi: 10.1103/PhysRevC.85.014606
2012JA11 Phys.Rev. C 86, 011304 (2012);Erratum Phys.Rev. C 86, 059902 (2012) M.F.Jager, R.J.Charity, J.M.Elson, J.Manfredi, H.Mohammad, L.G.Sobotka, M.McCleskey, R.G.Pizzone, B.T.Roeder, A.Spiridon, E.Simmons, L.Trache, M.Kurokawa Two-proton decay of 12O and its isobaric analog state in 12N NUCLEAR REACTIONS 9Be(13O, 12O), (13O, 12N), [13O secondary beam from 1H(14N, X), E=38 MeV/nucleon primary reaction], E=30.3 MeV/nucleon]; measured excitation energy spectra for p+11C, p+12C, 2p+10C, 2p+10B events. Two proton decay modes of g.s. of 12O and excited states of 12O and 12N. 12O, 12N; deduced levels, J, π, widths, IAS of 12O g.s. in 12N. 10B; deduced level, IAS in 10B from 2p decay of IAS in 12N. 13N; deduced level, J, π. RADIOACTIVITY 12O(2p)[9Be(13O, 12O), E=30.3 MeV/nucleon](2p); measured total excitation energy spectra for decay of g.s. of 12O. ATOMIC MASSES 12O, 12N; analyzed isobaric multiplet mass equation (IMME) for A=12 quintet; deduced mass excesses using the invariant mass method.
doi: 10.1103/PhysRevC.86.011304
2012LI37 Phys.Rev. C 86, 024605 (2012) T.X.Liu, W.G.Lynch, R.H.Showalter, M.B.Tsang, X.D.Liu, W.P.Tan, M.J.van Goethem, G.Verde, A.Wagner, H.F.Xi, H.S.Xu, M.A.Famiano, R.T.de Souza, V.E.Viola, R.J.Charity, L.G.Sobotka Isospin observables from fragment energy spectra NUCLEAR REACTIONS 112,124Sn(112Sn, X), (124Sn, X)1H/2H/3H/3He/4He/6He/6Li/7Li/8Li/9Li/7Be/9Be/10Be/11Be/10B/11B/12B/13B/11C/12C/13C/14C/15C/16C/14N/15N/16N/17N/18N/15O/16O/17O/18O/19O/20O, E=50 MeV/nucleon; measured energy spectra of light charged particles and intermediate mass fragments, fragment yields, σ(E) using LASSA, Miniball and Miniwall arrays at NSCL facility; deduced N/Z ratios.
doi: 10.1103/PhysRevC.86.024605
2012MA10 Phys.Rev. C 85, 037603 (2012) J.Manfredi, R.J.Charity, K.Mercurio, R.Shane, L.G.Sobotka, A.H.Wuosmaa, A.Banu, L.Trache, R.E.Tribble α decay of the excited states in 12C at 7.65 and 9.64 MeV NUCLEAR REACTIONS Be, C(10C, X)12C*, [secondary 10C beam from 10B(p, n)], E=107 MeV/nucleon; measured triple α events in coincidence mode, distribution of the root-mean-square energy deviation of the three α particles and E*(8Be); deduced α-decay properties of Hoyle state and 3- excited state through 8Be ground state. R-matrix analysis.
doi: 10.1103/PhysRevC.85.037603
2012SH21 Phys.Rev. C 85, 064612 (2012) R.Shane, R.J.Charity, L.G.Sobotka, D.Bazin, B.A.Brown, A.Gade, G.F.Grinyer, S.McDaniel, A.Ratkiewicz, D.Weisshaar, A.Bonaccorso, J.A.Tostevin Proton and neutron knockout from 36Ca NUCLEAR REACTIONS 9Be(36Ca, 35K), (36Ca, 35Ca), [36Ca secondary beam from 9Be(40Ca, X), E=140 MeV/nucleon primary reaction], E=70 MeV/nucleon; measured Eγ, particle spectra, time-of-flight, energy loss, cross sections, longitudinal-momentum distributions. 35K, 35Ca; deduced spectroscopic factors, orbital angular momenta of removed nucleons; calculated S matrices, bound-state wave-functions. Eikonal reaction theory, dispersive optical model (DOM) extrapolations. Shell-model spectroscopic factors from USD, USDA, and USDB interactions. 9Be(36Ca, X)33Ar, [33Ar from decay of unbound states in 35Ca], E=70 MeV/nucleon; measured σ; deduced missing spectroscopic strength.
doi: 10.1103/PhysRevC.85.064612
2011CH32 Phys.Rev. C 84, 014320 (2011) R.J.Charity, J.M.Elson, J.Manfredi, R.Shane, L.G.Sobotka, B.A.Brown, Z.Chajecki, D.Coupland, H.Iwasaki, M.Kilburn, J.Lee, W.G.Lynch, A.Sanetullaev, M.B.Tsang, J.Winkelbauer, M.Youngs, S.T.Marley, D.V.Shetty, A.H.Wuosmaa, T.K.Ghosh, M.E.Howard Investigations of three-, four-, and five-particle decay channels of levels in light nuclei created using a 9C beam NUCLEAR REACTIONS 9Be(9C, X), E=70 MeV/nucleon, [secondary 9C beam from 9Be(16O, X), E=150 MeV/nucleon primary beam]; measured particle spectra using HiRA array, angular correlations between the particles in particle-decay channels. 8Be, 7,8,9B, 8,10C; deduced levels, width, J, π, isospin, branching ratios, excitation spectra of outgoing particles from many-particle decays of ground and excited states.
doi: 10.1103/PhysRevC.84.014320
2011CH53 Phys.Rev. C 84, 051308 (2011) R.J.Charity, J.M.Elson, J.Manfredi, R.Shane, L.G.Sobotka, Z.Chajecki, D.Coupland, H.Iwasaki, M.Kilburn, J.Lee, W.G.Lynch, A.Sanetullaev, M.B.Tsang, J.Winkelbauer, M.Youngs, S.T.Marley, D.V.Shetty, A.H.Wuosmaa, T.K.Ghosh, M.E.Howard Isobaric multiplet mass equation for A=7 and 8 ATOMIC MASSES 7,8He, 7,8Li, 7,8Be, 7,8B, 8C; analyzed deviations from isobaric multiplet mass equation (IMME) for A=7, T=3/2 quartet and A=8, T=2 quintet; deduced coefficients from quadric, cubic, and quartic fits.
doi: 10.1103/PhysRevC.84.051308
2011LE01 Phys.Rev. C 83, 014606 (2011) J.Lee, M.B.Tsang, D.Bazin, D.Coupland, V.Henzl, D.Henzlova, M.Kilburn, W.G.Lynch, A.M.Rogers, A.Sanetullaev, Z.Y.Sun, M.Youngs, R.J.Charity, L.G.Sobotka, M.Famiano, S.Hudan, D.Shapira, P.O'Malley, W.A.Peters, K.Y.Chae, K.Schmitt Neutron spectroscopic factors of 34Ar and 46Ar from (p, d) transfer reactions NUCLEAR REACTIONS 1H(34Ar, d), (36Ar, d), (46Ar, d), E=33 MeV/nucleon, [34,46Ar secondary beams from 9Be(36Ar, X), E=150 MeV/nucleon and 9Be(48Ca, X), E=140 MeV/nucleon primary reactions]; measured Ed, Id, σ(θ); 34,36,46Ar; deduced neutron ground-state spectroscopic factors. Comparison with shell model calculations.
doi: 10.1103/PhysRevC.83.014606
2011MU10 Phys.Rev. C 83, 064605 (2011) J.M.Mueller, R.J.Charity, R.Shane, L.G.Sobotka, S.J.Waldecker, W.H.Dickhoff, A.S.Crowell, J.H.Esterline, B.Fallin, C.R.Howell, C.Westerfeldt, M.Youngs, B.J.Crowe, III, R.S.Pedroni Asymmetry dependence of nucleon correlations in spherical nuclei extracted from a dispersive-optical-model analysis NUCLEAR REACTIONS 40,48Ca(n, n), E=11.9, 16.9 MeV; measured E(n), I(n), σ, σ(E, θ), time-of-flight spectra. 40Ca(n, n), E=9.9-85.0; 48Ca(n, n), E=7.97-16.9 MeV; 54Ca(n, n), E=5.5-26.0 MeV; 58,60Ni(n, n), E=4.5-24.0 MeV; 92Mo(n, n), E=7.0-30.4 MeV; 116,118Sn(n, n), E=9.95-24.0 MeV; 120Sn(n, n), E=9.94-16.91 MeV; 124Sn(n, n), E=11.0-24.0 MeV; 208Pb(n, n), E=4.0-185.0 MeV; 50Ti(p, p), E=6.0-65.0 MeV; 52Cr(p, p), E=10.77-39.9 MeV; 54Fe, 64Ni(p, p), E=9.69-65.0 MeV; 58Ni(p, p), E=7.0-192.0 MeV; 60Ni(p, p), E=7.0-178.0 MeV; 62Ni(p, p), E=8.02-156.0 MeV; 90Zr(p, p), E=5.57-185.0 MeV; 92Mo(p, p), E=12.5-49.45 MeV; 114Sn(p, p), E=30.4 MeV; 116Sn(p, p), E=16.0-61.4 MeV; 118,122,124Sn(p, p), E=16.0-49.35 MeV; 120Sn(p, p), E=9.8-156.0 MeV; 208Pb(p, p), E=9.0-200.0 MeV; analyzed total cross sections, σ(E, θ), single-particle levels, spectroscopic factors, occupation probabilities, mass dependence on cross section. Dispersal optical model (DOM) analysis.
doi: 10.1103/PhysRevC.83.064605
2011RO18 Phys.Rev.Lett. 106, 252503 (2011) A.M.Rogers, M.A.Famiano, W.G.Lynch, M.S.Wallace, F.Amorini, D.Bazin, R.J.Charity, F.Delaunay, R.T.de Souza, J.Elson, A.Gade, D.Galaviz, M.-J.van Goethem, S.Hudan, J.Lee, S.Lobastov, S.Lukyanov, M.Matos, M.Mocko, H.Schatz, D.Shapira, L.G.Sobotka, M.B.Tsang, G.Verde Ground-State Proton Decay of 69Br and Implications for the 68Se Astrophysical Rapid Proton-Capture Process Waiting Point RADIOACTIVITY 69Br(p) [from Be(78Kr, X), E=140 MeV/nucleon]; measured reaction products, proton spectrum. 69Br, 68Se; deduced proton separation energy. Astrophysical implications, comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.106.252503
2011RO55 J.Phys.:Conf.Ser. 312, 042020 (2011) A.M.Rogers, W.G.Lynch, M.A.Famiano, M.S.Wallace, F.Amorini, D.Bazin, R.J.Charity, F.Delaunay, R.T.de Souza, J.Elson, A.Gade, D.Galaviz, S.Hudan, J.Lee, S.Lobostov, S.Lukyanov, M.Matos, M.Mocko, M.B.Tsang, D.Shapira, L.G.Sobotka, G.Verde Ground-state proton decay of 69Br and implications for the rp-process 68Se waiting-point RADIOACTIVITY 69Br(p); measured in-flight Ep, Ip(θ), E(Se), I(Se), (Se)p-coin using HiRA telescopes; deduced p-spectra, proton separation energy, implications for 2p capture of rp process.
doi: 10.1088/1742-6596/312/4/042020
2011SO20 Phys.Rev. C 84, 017601 (2011) Nuclear asymmetry enthalpy
doi: 10.1103/PhysRevC.84.017601
2011TO10 Phys.Rev. C 84, 044331 (2011) J.R.Tompkins, C.W.Arnold, H.J.Karwowski, G.C.Rich, L.G.Sobotka, C.R.Howell Measurements of the 48Ca(γ, n) reaction NUCLEAR REACTIONS 48Ca(polarized γ, n), E=9.5-15.3 MeV; measured E(n), I(n), Eγ, excitation functions, cross section; deduced B(M1) for 10.23 MeV resonance. High-intensity γ-ray source at TUNL. Comparison with previous studies, and with extended random-phase approximation calculations.
doi: 10.1103/PhysRevC.84.044331
2010BA36 Nucl.Phys. A834, 788c (2010) C.Barbieri, R.J.Charity, W.H.Dickhoff, L.G.Sobotka Toward a Global Dispersive Optical Model for the Driplines NUCLEAR REACTIONS 40Ca(n, n), E=9-185 MeV; 40Ca(p, p), E=17.6-200 MeV; 42,44Ca(p, p), E=21-65 MeV; 48Ca(p, p), E=8-200 MeV; calculated σ(θ), analyzing power. 40,48Ca calculated levels, J, widths, radii, spectroscopic factors; deduced dispersive optical model parameters. 58,60,62,64Ni(p, p), E not given; calculated σ(θ). Comparison with data.
doi: 10.1016/j.nuclphysa.2010.01.147
2010CH42 Phys.Rev. C 82, 041304 (2010) R.J.Charity, J.M.Elson, J.Manfredi, R.Shane, L.G.Sobotka, Z.Chajecki, D.Coupland, H.Iwasaki, M.Kilburn, J.Lee, W.G.Lynch, A.Sanetullaev, M.B.Tsang, J.Winkelbauer, M.Youngs, S.T.Marley, D.V.Shetty, A.H.Wuosmaa, T.K.Ghosh, M.E.Howard 2p-2p decay of 8C and isospin-allowed 2p decay of the isobaric-analog state in 8B NUCLEAR REACTIONS 9Be(9C, 8B), [9C beam from 9Be(16O, X) fragmentation], E=70 MeV/nucleon; measured Ep, Ip, 6Li-p-p correlated events from an excited state (IAS of 8C g.s.) in 8B by analyzing complete kinematics of 2p+6Li decay products; deduced 2p decay (isospin-allowed 2p decay between isobaric analog states). 9Be(9C, 8C), [9C beam from 9Be(16O, X) fragmentation], E=70 MeV/nucleon; measured Ep, Ip, 6Be-p-p and α-p-p-p-p correlated events from 8C g.s. by analyzing complete kinematics of 2p+6Be and α+2p+2p events. RADIOACTIVITY 8C(2p); measured Ep, Ip, Eα, Iα, α-p-p-p-p coin, α-p-p coin from the decay of 8C g.s.
doi: 10.1103/PhysRevC.82.041304
2010DI12 Phys.Rev. C 82, 054306 (2010) W.H.Dickhoff, D.Van Neck, S.J.Waldecker, R.J.Charity, L.G.Sobotka Nonlocal extension of the dispersive optical model to describe data below the Fermi energy NUCLEAR REACTIONS 40Ca(e, e'p), (p, 2p), E<150 MeV; calculated spectral functions, quasihole energies, spectroscopic factors, radii and charge density for proton orbits in 40Ca using dispersive-optical-model (DOM) analysis. Comparison with experimental data.
doi: 10.1103/PhysRevC.82.054306
2010GA02 Phys.Rev. C 81, 014604 (2010) W.Gawlikowicz, D.K.Agnihotri, S.A.Baldwin, W.U.Schroder, J.Toke, R.J.Charity, D.G.Sarantites, L.G.Sobotka, R.T.deSouza, T.Barczyk, K.Grotowski, S.Micek, R.Planeta, Z.Sosin Correlations between reaction product yields as a tool for probing heavy-ion reaction scenarios NUCLEAR REACTIONS 209Bi(136Xe, X), E=28, 40, 62 MeV/nucleon; analyzed reaction product yields for neutrons, light charged particles (LCP), projectile like (PLF) and intermediate-mass fragments (IMFs). Comparison with classical transport code CLAT, quantum molecular dynamics (QMD) code, sequential decay code GEMINI and statistical multifragmentation code SMM.
doi: 10.1103/PhysRevC.81.014604
2010LE03 Phys.Rev.Lett. 104, 112701 (2010) J.Lee, M.B.Tsang, D.Bazin, D.Coupland, V.Henzl, D.Henzlova, M.Kilburn, W.G.Lynch, A.M.Rogers, A.Sanetullaev, A.Signoracci, Z.Y.Sun, M.Youngs, K.Y.Chae, R.J.Charity, H.K.Cheung, M.Famiano, S.Hudan, P.O'Malley, W.A.Peters, K.Schmitt, D.Shapira, L.G.Sobotka Neutron-Proton Asymmetry Dependence of Spectroscopic Factors in Ar Isotopes NUCLEAR REACTIONS 1H(34Ar, d), (36Ar, d), (46Ar, d), E=33 MeV/nucleon; measured Eδ, Iδ; 34,36,46Ar; deduced neutron ground state spectroscopic factors. Comparison with shell model calculations.
doi: 10.1103/PhysRevLett.104.112701
2010SH03 Nucl.Instrum.Methods Phys.Res. A614, 468 (2010) R.Shane, R.J.Charity, J.M.Elson, L.G.Sobotka, M.Devlin, N.Fotiades, J.M.O'Donnell Total neutron cross-sections for rare isotopes using a digital-signal-processing technique: Case study 48Ca NUCLEAR REACTIONS 40,48Ca(n, X), E=15-300 Mev; measured TOF, En, In; deduced σ.
doi: 10.1016/j.nima.2010.01.005
2009AN01 Phys.Rev. C 79, 024312 (2009) L.-L.Andersson, I.Ragnarsson, D.Rudolph, E.K.Johansson, D.A.Torres, C.Andreoiu, M.P.Carpenter, R.J.Charity, C.J.Chiara, J.Ekman, C.Fahlander, C.Hoel, O.L.Pechenaya, W.Reviol, R.du Rietz, D.G.Sarantites, D.Seweryniak, L.G.Sobotka, S.Zhu Comprehensive γ-ray spectroscopy of rotational bands in the N = Z + 1nucleus 61Zn NUCLEAR REACTIONS 36Ar(28Si, n2p), E=142, 148 MeV; measured Eγ, Iγ, γγ-coin, neutron and particle spectra. 61Zn; deduced levels, J, π, multipolarity, bands. Comparison with Cranked Nilsson-Strutinsky calculations.
doi: 10.1103/PhysRevC.79.024312
2009BA27 Phys.Rev.Lett. 102, 232501 (2009) D.Bazin, R.J.Charity, R.T.de Souza, M.A.Famiano, A.Gade, V.Henzl, D.Henzlova, S.Hudan, J.Lee, S.Lukyanov, W.G.Lynch, S.McDaniel, M.Mocko, A.Obertelli, A.M.Rogers, L.G.Sobotka, J.R.Terry, J.A.Tostevin, M.B.Tsang, M.S.Wallace Mechanisms in Knockout Reactions
doi: 10.1103/PhysRevLett.102.232501
2009CH38 Phys.Rev. C 80, 024306 (2009) R.J.Charity, T.D.Wiser, K.Mercurio, R.Shane, L.G.Sobotka, A.H.Wuosmaa, A.Banu, L.Trache, R.E.Tribble Continuum spectroscopy with a 10C beam: Cluster structure and three-body decay NUCLEAR REACTIONS Be, C(10C, X), E=10.7 MeV/nucleon; measured fragment spectra, σ(θ), proton-proton angular correlations, widths, σ, energy distributions of diproton, sequential two-proton, 2p+2α, p+3α and other cluster particle-decay modes from ground and excited resonant states. 10B, 10C, 13N; deduced levels, J, π, resonances, particle decay modes. Resonance-decay spectroscopic techniques. Monte Carlo analysis of energy distributions. Comparison with two-proton decay modes from 6Be and 45Fe.
doi: 10.1103/PhysRevC.80.024306
2009GE14 Phys.Rev. C 80, 051304 (2009) J.Gellanki, I.Ragnarsson, D.Rudolph, C.E.Svensson, L.-L.Andersson, C.Andreoiu, C.Baktash, M.P.Carpenter, R.J.Charity, C.J.Chiara, J.Eberth, J.Ekman, C.Fahlander, D.S.Haslip, E.K.Johansson, D.R.LaFosse, S.D.Paul, O.L.Pechenaya, W.Reviol, R.du Rietz, D.G.Sarantites, D.Seweryniak, L.G.Sobotka, H.G.Thomas, D.A.Torres, J.C.Waddington, J.N.Wilson, C.H.Yu, S.Zhu Characterization of superdeformed bands in 62Zn NUCLEAR REACTIONS 28Si(36Ar, 2p), E=140 MeV; 40Ca(28Si, 2pα), E=122 MeV; measured Eγ, Iγ, γγ-coin, DCO using Gammasphere array. 62Zn; deduced levels, J, π, moment of inertia, configurations. Comparison with cranked Nilsson-Strutinsky calculations.
doi: 10.1103/PhysRevC.80.051304
2009GR07 Phys.Lett. B 677, 30 (2009) L.V.Grigorenko, T.D.Wiser, K.Miernik, R.J.Charity, M.Pfutzner, A.Banu, C.R.Bingham, M.Cwiok, I.G.Darby, W.Dominik, J.M.Elson, T.Ginter, R.Grzywacz, Z.Janas, M.Karny, A.Korgul, S.N.Liddick, K.Mercurio, M.Rajabali, K.Rykaczewski, R.Shane, L.G.Sobotka, A.Stolz, L.Trache, R.E.Tribble, A.H.Wuosmaa, M.V.Zhukov Complete correlation studies of two-proton decays: 6Be and 45Fe NUCLEAR REACTIONS 1H(10B, n), E not given; Ni(58Ni, X)45Fe, E=161 MeV/nucleon; measured Ep, Ip, Eα, Iα, product energy and angular correlation distributions in a kinematically complete experiment. Comparison with three-body cluster model. RADIOACTIVITY 6Be, 45Fe(2p); measured energy and angular correlation distributions.
doi: 10.1016/j.physletb.2009.04.085
2009GR11 Phys.Rev. C 80, 034602 (2009) L.V.Grigorenko, T.D.Wiser, K.Mercurio, R.J.Charity, R.Shane, L.G.Sobotka, J.M.Elson, A.H.Wuosmaa, A.Banu, M.McCleskey, L.Trache, R.E.Tribble, M.V.Zhukov Three-body decay of 6Be NUCLEAR REACTIONS 1H(10B, n)10C, E=15 MeV/nucleon; measured Ep, Ip, Eα, Iα, energy and angular correlation distributions in a kinematically complete experiment. Comparison with three-body cluster model. RADIOACTIVITY 6Be(2p)[from 10C(α)]; measured Ep, Iπ, angular distributions. NUCLEAR STRUCTURE 6Be, 6He; calculated densities and radial properties of ground-state wave functions. Three-body hyperspherical-harmonics cluster model.
doi: 10.1103/PhysRevC.80.034602
2009JO03 Phys.Rev. C 80, 014321 (2009) E.K.Johansson, D.Rudolph, I.Ragnarsson, L.-L.Andersson, D.A.Torres, C.Andreoiu, C.Baktash, M.P.Carpenter, R.J.Charity, C.J.Chiara, J.Ekman, C.Fahlander, O.L.Pechenaya, W.Reviol, R.du Rietz, D.G.Sarantites, D.Seweryniak, L.G.Sobotka, C.H.Yu, S.Zhu Thorough γ-ray and particle decay investigations of 58Ni NUCLEAR REACTIONS 28Si(36Ar, 2pα), E=136, 143, 148 MeV; measured Eγ, Iγ, Ep, Ip, Eα, (particle)γ-, nγ-, pγ-, αγ-, γγ-coin, γγ(θ), DCO. 58Ni; deduced levels, J, π, multipolarity, mixing ratio, bands and configurations. 57Co, 54Fe; deduced levels, J, π from prompt proton and α emission from 58Ni high-spin states. Comparison with large-scale shell model and cranked Nilsson-Strutinsky calculations.
doi: 10.1103/PhysRevC.80.014321
2008AN06 Eur.Phys.J. A 36, 251 (2008) L.-L.Andersson, D.Rudolph, E.K.Johansson, D.A.Torres, B.G.Carlsson, I.Ragnarsson, C.Andreoiu, C.Baktash, M.P.Carpenter, R.J.Charity, C.J.Chiara, J.Ekman, C.Fahlander, C.Hoel, O.L.Pechenaya, W.Reviol, R.du Rietz, D.G.Sarantites, D.Seweryniak, L.G.Sobotka, C.H.Yu, S.Zhu Extensive γ-ray spectroscopy of normally and superdeformed structures in 6129Cu32 NUCLEAR REACTIONS 28Si(36Ar, 3p), E=142, 143, 148 MeV; measured Eγ, Iγ, En, In, charged-particle spectra, (proton)γ-, γγ-coin. 61Cu deduced energy levels, J, π, band structure, configurations, transition intensities and multipolarities using directional correlations of oriented states analysis. Comparison with shell model and cranked Nilsson-Strutinsky calculations. Gammasphere and Microball arrays. Enriched target.
doi: 10.1140/epja/i2008-10590-9
2008CH28 Phys.Rev. C 78, 054307 (2008) R.J.Charity, S.A.Komarov, L.G.Sobotka, J.Clifford, D.Bazin, A.Gade, J.Lee, S.M.Lukyanov, W.G.Lynch, M.Mocko, S.P.Lobastov, A.M.Rogers, A.Sanetullaev, M.B.Tsang, M.S.Wallace, R.G.T.Zegers, S.Hudan, C.Metelko, M.A.Famiano, A.H.Wuosmaa, M.J.van Goethem Investigation of particle-unbound excited states in light nuclei with resonance-decay spectroscopy using a 12Be beam NUCLEAR REACTIONS H, C(12Be, X), E=50 MeV/nucleon; measured particle spectra, (particle)(particle)-coin, angular distributions. 6,7,9Li, 8,9,10Be, 12,13B; deduced levels, J, π, widths, isospins.
doi: 10.1103/PhysRevC.78.054307
2008JO04 Phys.Rev. C 77, 064316 (2008) E.K.Johansson, D.Rudolph, L.-L.Andersson, D.A.Torres, I.Ragnarsson, C.Andreoiu, C.Baktash, M.P.Carpenter, R.J.Charity, C.J.Chiara, J.Ekman, C.Fahlander, C.Hoel, O.L.Pechenaya, W.Reviol, R.du Rietz, D.G.Sarantites, D.Seweryniak, L.G.Sobotka, C.H.Yu, S.Zhu Prompt proton decay and deformed bands in 56Ni NUCLEAR REACTIONS 28Si(36Ar, 2α), E=142, 143, 148 MeV; measured Eγ, Iγ, γγ-coin, angular distributions, multipolarities. 56Ni; deduced levels, J, π, bands, deformation parameters. Comparison with cranked Nilsson-Strutinsky calculations. RADIOACTIVITY 56Ni(p); measured proton spectra. 55Co; deduced levels, J, π.
doi: 10.1103/PhysRevC.77.064316
2008ME11 Phys.Rev. C 78, 031602 (2008) K.Mercurio, R.J.Charity, R.Shane, L.G.Sobotka, J.M.Elson, M.Famiano, A.H.Wuosmaa, A.Banu, C.Fu, L.Trache, R.E.Tribble, A.M.Mukhamedzhanov Correlated two-proton decay from 10C NUCLEAR REACTIONS Be, C(10C, 10C'), E=10.7 MeV; measured proton spectra, α spectra, αp-, pp-coin from excited states. 10C; deduced levels, correlated 2p decay mode.
doi: 10.1103/PhysRevC.78.031602
2008TO15 Phys.Rev. C 78, 054318 (2008) D.A.Torres, F.Cristancho, L.-L.Andersson, E.K.Johansson, D.Rudolph, C.Fahlander, J.Ekman, R.du Rietz, C.Andreoiu, M.P.Carpenter, D.Seweryniak, S.Zhu, R.J.Charity, C.J.Chiara, C.Hoel, O.L.Pechenaya, W.Reviol, D.G.Sarantites, L.G.Sobotka, C.Baktash, C.-H.Yu, B.G.Carlsson, I.Ragnarsson Deformations and magnetic rotations in the 60Ni nucleus NUCLEAR REACTIONS 28Si(36Ar, 4p), E=134, 143, 148 MeV; measured Eγ, Iγ, γγ-coin, angular distributions. 60Ni; deduced levels, J, π, multipolarity, mixing ratios, B(M1), B(E2). Comparison with cranked Nilsson Strutinsky calculations.
doi: 10.1103/PhysRevC.78.054318
2007CH39 Phys.Rev. C 75, 051304 (2007) R.J.Charity, K.Mercurio, L.G.Sobotka, J.M.Elson, M.Famiano, A.Banu, C.Fu, L.Trache, R.E.Tribble Decay of 10C excited states above the 2p + 2α threshold and the contribution from "democratic" two-proton emission NUCLEAR REACTIONS 9Be(10C, 10C), E=10.7 MeV/nucleon; measured Ep, Eα, 2p2α decay of the excited states; 10C; deduced level energies and intrinsic widths for particle unbound states.
doi: 10.1103/PhysRevC.75.051304
2007CH72 Phys.Rev. C 76, 044314 (2007) R.J.Charity, J.M.Mueller, L.G.Sobotka, W.H.Dickhoff Dispersive-optical-model analysis of the asymmetry dependence of correlations in Ca isotopes NUCLEAR REACTIONS 40Ca(p, p), E=17.57-200.0 MeV; 42,44Ca(p, p), E=21.0-65.0 MeV; 48Ca(p, p), E=8.0-200.0 MeV; 40Ca(n, n), E=9.9-185.0 MeV; analyzed differential cross sections, angular distributions, polarization asymmetry, widths, rms radii and spectroscopic factors. Deduced optical-model parameters. 60Ca, 70Ca deduced prediction for particle stability.
doi: 10.1103/PhysRevC.76.044314
2007CH81 Phys.Rev. C 76, 064313 (2007) R.J.Charity, S.A.Komarov, L.G.Sobotka, J.Clifford, D.Bazin, A.Gade, J.Lee, S.M.Lukyanov, W.G.Lynch, M.Mocko, S.P.Lobastov, A.M.Rogers, A.Sanetullaev, M.B.Tsang, M.S.Wallace, S.Hudan, C.Metelko, M.A.Famiano, A.H.Wuosmaa, M.J.van Goethem Particle decay of 12Be excited states NUCLEAR REACTIONS H, 12C(12Be, X), E=50 MeV/nucleon; measured charged particle spectra. 12Be; measured breakup cross sections for decay modes α+8He, 6He+6He, 3H+9Li, p+11Li; deduced excitation energies.
doi: 10.1103/PhysRevC.76.064313
2007HO01 Phys.Rev. C 75, 017601 (2007) C.Hoel, L.G.Sobotka, R.J.Charity Asymmetry dependence of the caloric curve for mononuclei
doi: 10.1103/PhysRevC.75.017601
2007KO43 Phys.Rev. C 75, 064611 (2007) S.Komarov, R.J.Charity, C.J.Chiara, W.Reviol, D.G.Sarantites, L.G.Sobotka, A.L.Caraley, M.P.Carpenter, D.Seweryniak Search for the fade out of a collective enhancement of the nuclear level density NUCLEAR REACTIONS 160Gd(18O, X)178Hf, E=79-156 MeV; measured Eα, Eγ, particle γ-coinc. Deduced total cross sections for xn channels. Compared results to model calculations.
doi: 10.1103/PhysRevC.75.064611
2007LI52 Phys.Rev. C 76, 034603 (2007) T.X.Liu, W.G.Lynch, M.B.Tsang, X.D.Liu, R.Shomin, W.P.Tan, G.Verde, A.Wagner, H.F.Xi, H.S.Xu, B.Davin, Y.Larochelle, R.T.de Souza, R.J.Charity, L.G.Sobotka Isospin diffusion observables in heavy-ion reactions
doi: 10.1103/PhysRevC.76.034603
2007MC06 Phys.Rev.Lett. 99, 132701 (2007) A.B.McIntosh, S.Hudan, C.J.Metelko, R.T.de Souza, R.J.Charity, L.G.Sobotka, W.G.Lynch, M.B.Tsang Tidal Effects and the Proximity Decay of Nuclei RADIOACTIVITY 8Be(α) [ from 92Mo(114Cd, X), E=50 MeV/nucleon]; measured Eα, Iα, relative α energies as a function of decay angle. Deduced evidence for tidal effect. Compared results to model calculations.
doi: 10.1103/PhysRevLett.99.132701
2007VE07 Phys.Lett. B 653, 12 (2007) G.Verde, P.Danielewicz, W.G.Lynch, C.F.Chan, C.K.Gelbke, L.K.Kwong, T.X.Liu, X.D.Liu, D.Seymour, R.Shomin, W.P.Tan, M.B.Tsang, A.Wagner, H.S.Xu, D.A.Brown, B.Davin, Y.Larochelle, R.T.de Souza, R.Yanez, R.J.Charity, L.G.Sobotka d-α correlation functions and collective motion in Xe+Au collisions at E/A=50 MeV NUCLEAR REACTIONS 197Au(129Xe, X), E=50 MeV/nucleon; measured charged particle spectra, d-α correlation function. Comparison with model results with thermal and collective motion.
doi: 10.1016/j.physletb.2007.07.031
2006CH46 Phys.Rev.Lett. 97, 162503 (2006) R.J.Charity, L.G.Sobotka, W.H.Dickhoff Asymmetry Dependence of Proton Correlations NUCLEAR REACTIONS 40,48Ca(p, X), E=5-50 MeV; analyzed reaction σ. 40Ca(p, p), E=18-135 MeV; 48Ca(p, p), E=8-65 MeV; analyzed σ(θ), analyzing powers. 40,48Ca deduced proton states energies, widths, occupation probabilities, asymmetry dependence of proton correlations. Dispersive optical model. NUCLEAR STRUCTURE 40,48,60Ca; calculated proton single-particle level energies.
doi: 10.1103/PhysRevLett.97.162503
2006FA06 Phys.Rev.Lett. 97, 052701 (2006) M.A.Famiano, T.Liu, W.G.Lynch, M.Mocko, A.M.Rogers, M.B.Tsang, M.S.Wallace, R.J.Charity, S.Komarov, D.G.Sarantites, L.G.Sobotka, G.Verde Neutron and Proton Transverse Emission Ratio Measurements and the Density Dependence of the Asymmetry Term of the Nuclear Equation of State NUCLEAR REACTIONS 112Sn(112Sn, X), 124Sn(124Sn, X), E=50 MeV/nucleon; measured En, Ep, light charged particle spectra, neutron and proton transverse emission ratios; deduced density dependence of equation of state asymmetry term. Transport model.
doi: 10.1103/PhysRevLett.97.052701
2006LI21 Europhys.Lett. 74, 806 (2006) T.X.Liu, W.G.Lynch, M.J.van Goethem, X.D.Liu, R.Shomin, W.P.Tan, M.B.Tsang, G.Verde, A.Wagner, H.F.Xi, H.S.Xu, W.A.Friedman, S.R.Souza, R.Donangelo, L.Beaulieu, B.Davin, Y.Larochelle, T.Lefort, R.T.de Souza, R.Yanez, V.E.Viola, R.J.Charity, L.G.Sobotka Cooling dynamics in multi-fragmentation processes NUCLEAR REACTIONS 112Sn(112Sn, X), E not given; measured fragments isotopic yields, kinetic energy spectra; deduced pre-equilibrium effects.
doi: 10.1209/epl/i2006-10040-x
2006SO01 Phys.Rev. C 73, 014609 (2006) Entropy and caloric curve for mononuclei considering both surface diffuseness and self-similar expansion degrees of freedom
doi: 10.1103/PhysRevC.73.014609
2005CH12 Phys.Rev. C 71, 024310 (2005) Continuum corrections to the level density and its dependence on excitation energy, n-p asymmetry, and deformation NUCLEAR STRUCTURE 40Si, 40S, 40Ar, 40Ca, 40,60Ti, 60Cr, 60Fe, 60Ni, 60Zn, 60Ge, 150,160,170,180,190Yb, 170Nd, 170Hg, 238U; calculated level density parameters, deformation dependence, continuum corrections.
doi: 10.1103/PhysRevC.71.024310
2005HU11 Phys.Rev. C 71, 054604 (2005) S.Hudan, R.Alfaro, B.Davin, Y.Larochelle, H.Xu, L.Beaulieu, T.Lefort, R.Yanez, R.T.de Souza, R.J.Charity, L.G.Sobotka, T.X.Liu, X.D.Liu, W.G.Lynch, R.Shomin, W.P.Tan, M.B.Tsang, A.Vander Molen, A.Wagner, H.F.Xi Comparison of midvelocity fragment formation with projectilelike decay NUCLEAR REACTIONS 92Mo(114Cd, X), E=50 MeV/nucleon; measured fragments charge distribution, isotopic yields, transverse velocity.
doi: 10.1103/PhysRevC.71.054604
2005RE07 Nucl.Instrum.Methods Phys.Res. A541, 478 (2005) W.Reviol, D.G.Sarantites, R.J.Charity, C.J.Chiara, J.Elson, M.Montero, O.L.Pechenaya, S.K.Ryu, L.G.Sobotka "HERCULES": Design, instrumentation, and performance characteristics of a high-efficiency evaporation-residue counter under a lot of elastic scattering for spectroscopic studies with Gammasphere NUCLEAR REACTIONS 126Te(48Ti, xnypzα), E=238 MeV; 142Nd(48Ti, xnypzα), E=230 MeV; measured Eγ, Iγ, γγ-, (particle)γ-coin, evaporation residue energy and angular distribution. Gammasphere, Hercules arrays.
doi: 10.1016/j.nima.2004.12.028
2005TO13 Phys.Rev. C 72, 031601 (2005) J.Toke, L.Pienkowski, L.G.Sobotka, M.Houck, W.U.Schroder Retardation of particle evaporation from excited nuclear systems due to thermal expansion
doi: 10.1103/PhysRevC.72.031601
2004HU16 Phys.Rev. C 70, 031601 (2004) S.Hudan, R.Alfaro, L.Beaulieu, B.Davin, Y.Larochelle, T.Lefort, V.E.Viola, H.Xu, R.Yanez, R.T.de Souza, R.J.Charity, L.G.Sobotka, T.X.Liu, X.D.Liu, W.G.Lynch, R.Shomin, W.P.Tan, M.B.Tsang, A.Vander Molen, A.Wagner, H.F.Xi Interplay of initial deformation and Coulomb proximity on nuclear decay NUCLEAR REACTIONS 92Mo(114Cd, X), E=50 MeV/nucleon; measured Eα, angular distributions following projectile-like fragment decay; deduced deformation and orientation effects, related reaction mechanism features.
doi: 10.1103/PhysRevC.70.031601
2004LI08 Phys.Rev. C 69, 014603 (2004) T.X.Liu, M.J.van Goethem, X.D.Liu, W.G.Lynch, R.Shomin, W.P.Tan, M.B.Tsang, G.Verde, A.Wagner, H.F.Xi, H.S.Xu, M.Colonna, M.Di Toro, M.Zielinska-Pfabe, H.H.Wolter, L.Beaulieu, B.Davin, Y.Larochelle, T.Lefort, R.T.de Souza, R.Yanez, V.E.Viola, R.J.Charity, L.G.Sobotka Isotope yields from central 112, 124Sn + 112, 124Sn collisions: Dynamical emission? NUCLEAR REACTIONS 112,124Sn(112Sn, X), (124Sn, X), E=50 MeV/nucleon; measured light fragment isotopic yields; deduced reaction mechanism features. Stochastic mean field calculations.
doi: 10.1103/PhysRevC.69.014603
2004SA43 Nucl.Instrum.Methods Phys.Res. A530, 473 (2004) D.G.Sarantites, W.Reviol, C.J.Chiara, R.J.Charity, L.G.Sobotka, M.Devlin, M.Furlotti, O.L.Pechenaya, J.Elson, P.Hausladen, S.Fischer, D.Balamuth, R.M.Clark "Neutron Shell": a high efficiency array of neutron detectors for γ-ray spectroscopic studies with Gammasphere NUCLEAR REACTIONS 28Si(32S, xnyp), E=130 MeV; measured Eγ, En, γγ-, nγ-, (charged particle)nγ-coin, neutron angular distributions. Gammasphere, Microball, "Neutron Shell" arrays.
doi: 10.1016/j.nima.2004.04.243
2004SO25 Phys.Rev.Lett. 93, 132702 (2004) L.G.Sobotka, R.J.Charity, J.Toke, W.U.Schroder Caloric Curve for Mononuclear Configurations
doi: 10.1103/PhysRevLett.93.132702
2004TA17 Phys.Rev. C 69, 061304 (2004) W.P.Tan, W.G.Lynch, T.X.Liu, X.D.Liu, M.B.Tsang, G.Verde, A.Wagner, H.S.Xu, B.Davin, R.T.de Souza, Y.Larochelle, R.Yanez, R.J.Charity, L.G.Sobotka Spin determination of particle unstable levels with particle correlations NUCLEAR REACTIONS 197Au(129Xe, X), E=50 MeV/nucleon; measured charged particle spectra, correlations. 8Be, 8B; deduced excited states J, π. Equilibrium approach.
doi: 10.1103/PhysRevC.69.061304
2004TS01 Phys.Rev.Lett. 92, 062701 (2004) M.B.Tsang, T.X.Liu, L.Shi, P.Danielewicz, C.K.Gelbke, X.D.Liu, W.G.Lynch, W.P.Tan, G.Verde, A.Wagner, H.S.Xu, W.A.Friedman, L.Beaulieu, B.Davin, R.T.de Souza, Y.Larochelle, T.Lefort, R.Yanez, V.E.Viola, Jr., R.J.Charity, L.G.Sobotka Isospin Diffusion and the Nuclear Symmetry Energy in Heavy Ion Reactions NUCLEAR REACTIONS 112,124Sn(112Sn, X), (124Sn, X), E=50 MeV/nucleon; measured Z=1-8 fragments isotopic yields; deduced isospin diffusion effects. Transport model calculations.
doi: 10.1103/PhysRevLett.92.062701
2003CH23 Phys.Rev. C 67, 044611 (2003) R.J.Charity, L.G.Sobotka, J.F.Dempsey, M.Devlin, S.Komarov, D.G.Sarantites, A.L.Caraley, R.T.deSouza, W.Loveland, D.Peterson, B.B.Back, C.N.Davids, D.Seweryniak Temperature and n-p asymmetry dependencies of the level-density parameter in Ni+Mo fusion reactions NUCLEAR REACTIONS 92,100Mo(60Ni, X), E=5-9 MeV/nucleon; measured evaporation residue velocity and angular distributions, mass distributions, neutron and light charged particle spectra; deduced reaction mechanism features. Comparison with statistical model predictions.
doi: 10.1103/PhysRevC.67.044611
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