NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = G.Christian Found 49 matches. 2022LO01 Phys.Rev.Lett. 128, 042701 (2022) G.Lotay, A.Lennarz, C.Ruiz, C.Akers, A.A.Chen, G.Christian, D.Connolly, B.Davids, T.Davinson, J.Fallis, D.A.Hutcheon, P.Machule, L.Martin, D.J.Mountford, A.St.J.Murphy Radiative Capture on Nuclear Isomers: Direct Measurement of the 26mAl(p, γ)27Si Reaction NUCLEAR REACTIONS 1H(26Al, γ), E=390 keV/nucleon; measured reaction products, Eγ, Iγ; deduced resonance energies and parameters, astrophysical reaction rates. Comparison with available data.
doi: 10.1103/PhysRevLett.128.042701
2021CA19 Phys.Rev. C 104, L022802 (2021) L.Canete, G.Lotay, G.Christian, D.T.Doherty, W.N.Catford, S.Hallam, D.Seweryniak, H.M.Albers, S.Almaraz-Calderon, E.A.Bennett, M.P.Carpenter, C.J.Chiara, J.P.Greene, C.R.Hoffman, R.V.F.Janssens, J.Jose, A.Kankainen, T.Lauritsen, A.Matta, M.Moukaddam, S.Ota, A.Saastamoinen, R.Wilkinson, S.Zhu New constraints on the 25Al (p, γ) reaction and its influence on the flux of cosmic γ rays from classical nova explosions NUCLEAR REACTIONS 11B(16O, p)26Mg, E=19 MeV from Argonne ATLAS accelerator; measured Eγ, Iγ, γγ-coin, γ(θ) and level half-lives by DSAM using Gammasphere array of 99 HPGe detectors. 2H(25Mg, p)26Mg, E=10 MeV/nucleon from Texas A and M cyclotron; measured outgoing protons and scattered deuterons using the TIARA Si array, and 26Mg recoils by the MDM-2 magnetic spectrometer with Oxford ionization chamber, angular distributions of scattered deuterons and protons. 26Mg; deduced levels, J, π, resonances, spectroscopic factors. 26Si; deduced levels, resonances, J, π, Γp, Γγ, resonance strengths by comparing with the level structures of mirror nucleus 26Mg. 25Al(p, γ)26Si, T=0.2-0.4 GK; deduced stellar reaction rate by considering the contribution of resonant states in 26Si, galactic abundance of 26Al from classical novae; performed nova outburst simulations using the hydrodynamic Lagrangian time-implicit code SHIVA.
doi: 10.1103/PhysRevC.104.L022802
2021OT02 Phys.Rev. C 104, 055806 (2021) S.Ota, G.Christian, W.N.Catford, G.Lotay, M.Pignatari, U.Battino, E.A.Bennett, S.Dede, D.T.Doherty, S.Hallam, F.Herwig, J.Hooker, C.Hunt, H.Jayatissa, A.Matta, M.Moukaddam, E.Rao, G.V.Rogachev, A.Saastamoinen, D.Scriven, J.A.Tostevin, S.Upadhyayula, R.Wilkinson (6Li, d) and (6Li, t) reactions on 22Ne and implications for s-process nucleosynthesis NUCLEAR REACTIONS 6Li(22Ne, d)26Mg, 6Li(22Na, t)25Mg, E=154 MeV; 2H(22Ne, p)23Ne, E not given; measured reaction products, E(d), I(d), E(p), I(p), Eγ, Iγ, 26Mg and 25Mg recoils, (26Mg)γ-coin, (25Mg)γ-coin, (particle)(particle)-coin, σ(θ) using TIARA Si detector array of two sets of Si detectors, 'Hyball' and 'Barrel', MDM high-resolution and broad range magnetic spectrometer, and array of four HPGe detectors at the K150 cyclotron of Texas A and M University. 23Ne, 25Mg, 26Mg; deduced levels, J, π, resonances, resonances in the Gamow window of 22Ne(α, n)25Mg reaction, spectroscopic factors, α-spectroscopic factors for 26Mg, resonance strengths, impact of 22Ne+α resonances on s-process nucleosynthesis; comparison of σ(θ) data with DWBA calculations using FRESCO code. Comparison with previous experimental results. 22Ne(α, n), (α, γ); calculated s-process overproduction factors in stars 3 and 5 times the mass of the sun for A=60-210 isotopes.
doi: 10.1103/PhysRevC.104.055806
2021RA22 Phys.Rev. C 104, L042801 (2021) J.S.Randhawa, R.Kanungo, J.Refsgaard, P.Mohr, T.Ahn, M.Alcorta, C.Andreoiu, S.S.Bhattacharjee, B.Davids, G.Christian, A.A.Chen, R.Coleman, P.E.Garrett, G.F.Grinyer, E.G.Fuakye, G.Hackman, J.Hollett, R.Jain, K.Kapoor, R.Krucken, A.Laffoley, A.Lennarz, J.Liang, Z.Meisel, B.Nikhil, A.Psaltis, A.Radich, M.Rocchini, N.Saei, M.Saxena, M.Singh, C.Svensson, P.Subramaniam, A.Talebitaher, S.Upadhyayula, C.Waterfield, J.Williams, M.Williams First direct measurement of 59Cu(p, α)56Ni: step towards constraining the Ni-Cu cycle in the cosmos NUCLEAR REACTIONS 1H(59Cu, α)56Ni, E=8.5 MeV/nucleon, [secondary 59Cu beam from Nb(p, X), E=480 MeV at the TRIUMF cyclotron, followed by re-acceleration of 59Cu beam by ISAC-II superconducting LINAC, solid H2 target]; measured protons and α particles, angle-integrated σ using thick single-sided silicon strip detectors and a layer of thick CsI(Tl) detectors; deduced ratio of integrated σ to total σ, exclusive population of the ground state of 56Ni in (p, α). Comparison with Hauser-Feshbach based statistical model calculations; deduced overestimation of (p, α) cross section in this region. Discussed impact on νp process and x-ray bursts (XRBs). Relevance to Ni-Cu cycle in nucleosynthesis, with competing 59Cu(p, α)56Ni and 59Cu(p, γ)60Zn reactions.
doi: 10.1103/PhysRevC.104.L042801
2020FA06 Phys.Lett. B 807, 135575 (2020) J.Fallis, C.Akers, A.M.Laird, A.Simon, A.Spyrou, G.Christian, D.Connolly, U.Hager, D.A.Hutcheon, A.Lennarz, P.O'Malley, S.J.Quinn, J.Riley, A.Rojas, C.Ruiz, M.Williams First measurement in the Gamow window of a reaction for the γ process in inverse kinematics: 76Se(α, γ)80Kr NUCLEAR REACTIONS 4He(76Se, γ)80Kr, E=1.4-1.5 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced σ, reaction rates. Comparison with calculations.
doi: 10.1016/j.physletb.2020.135575
2020JA02 Phys.Lett. B 802, 135267 (2020) H.Jayatissa, G.V.Rogachev, V.Z.Goldberg, E.Koshchiy, G.Christian, J.Hooker, S.Ota, B.T.Roeder, A.Saastamoinen, O.Trippella, S.Upadhyayula, E.Uberseder Constraining the 22Ne(α, γ))26Mg and 22Ne(α, n)25Mg reaction rates using sub-Coulomb α-transfer reactions NUCLEAR REACTIONS 6Li(22Ne, d), E(cm)=4.6 MeV; 6Li(22Ne, t), E(cm)=5.3 MeV; measured reaction products; deduced excitation energies, σ, resonance parameters, astrophysical rates.
doi: 10.1016/j.physletb.2020.135267
2020LO03 Eur.Phys.J. A 56, 3 (2020) G.Lotay, P.J.Woods, M.Moukaddam, M.Aliotta, G.Christian, B.Davids, T.Davinson, D.T.Doherty, D.Howell, V.Margerin, C.Ruiz High-resolution radioactive beam study of the 26Al(d, p) reaction and measurements of single-particle spectroscopic factors NUCLEAR REACTIONS 2H(26Al, p), E=6 MeV/nucleon; measured reaction products, Ep, Ip. 26,27Al; deduced σ(θ), excited states, resonance parameters, spectroscopic factors. Comparison of shell model calculations with inverse kinematic transfer reaction data. The ISAC-II radioactive beams facility at TRIUMF.
doi: 10.1140/epja/s10050-019-00008-8
2020OT01 Phys.Lett. B 802, 135256 (2020) S.Ota, G.Christian, G.Lotay, W.N.Catford, E.A.Bennett, S.Dede, D.T.Doherty, S.Hallam, J.Hooker, C.Hunt, H.Jayatissa, A.Matta, M.Moukaddam, G.V.Rogachev, A.Saastamoinen, J.A.Tostevin, S.Upadhyayula, R.Wilkinson Decay properties of 22Ne + α resonances and their impact on s-process nucleosynthesis NUCLEAR REACTIONS 6Li(22Ne, d)26Mg, E=154 MeV; measured reaction products; deduced resonance parameters, n/γ branching ratio. Comparison with Monte Carlo calculations.
doi: 10.1016/j.physletb.2020.135256
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
2018CH08 Phys.Rev. C 97, 025802 (2018) G.Christian, G.Lotay, C.Ruiz, C.Akers, D.S.Burke, W.N.Catford, A.A.Chen, D.Connolly, B.Davids, J.Fallis, U.Hager, D.Hutcheon, A.Mahl, A.Rojas, X.Sun Direct measurement of astrophysically important resonances in 38K(p, γ) 39Ca NUCLEAR REACTIONS 1H(38K, γ)39Ca, E=15.58, 20.56, 27.17 MeV, [38K secondary beam produced at ISAC-I, TRIUMF facility by impinging 500 MeV protons on a high-power TiC production target]; measured recoils using DRAGON spectrometer, prompt Eγ, Iγ, (recoil)γ-coin using bismuth-germanate scintillator array for γ detection. Windowless hydrogen gas target; deduced energies of resonances, resonance strengths for the 386-, 515- and 689-keV proton resonances, astrophysical reaction rates for temperature range of 150-500 MK, abundances of 38Ar, 39K, and 40Ca in the hottest oxygen-neon novae.
doi: 10.1103/PhysRevC.97.025802
2018CO04 Phys.Rev. C 97, 035801 (2018) D.Connolly, P.D.O'Malley, C.Akers, A.A.Chen, G.Christian, B.Davids, L.Erikson, J.Fallis, B.R.Fulton, U.Greife, U.Hager, D.A.Hutcheon, S.Ilyushkin, A.M.Laird, A.Mahl, C.Ruiz Direct measurement of resonance strengths in 34S(α, γ)38Ar at astrophysically relevant energies using the DRAGON recoil separator NUCLEAR REACTIONS 4He(34S, γ)38Ar, E=20.23-25.75 MeV; measured Eγ, Iγ, 34S and 38Ar recoils, (recoil)γ-coin using DRAGON recoil mass separator at ISAC-I, TRIUMF. 38Ar; deduced levels, resonance energies, resonance strengths, thermonuclear reaction rates. Comparison with theoretical calculations using NON-SMOKER Hauser-Feshbach statistical model, and REACLIB and STARLIB library rates.
doi: 10.1103/PhysRevC.97.035801
2017KU11 Phys.Rev.Lett. 118, 262502 (2017) A.Kumar, R.Kanungo, A.Calci, P.Navratil, A.Sanetullaev, M.Alcorta, V.Bildstein, G.Christian, B.Davids, J.Dohet-Eraly, J.Fallis, A.T.Gallant, G.Hackman, B.Hadinia, G.Hupin, S.Ishimoto, R.Krucken, A.T.Laffoley, J.Lighthall, D.Miller, S.Quaglioni, J.S.Randhawa, E.T.Rand, A.Rojas, R.Roth, A.Shotter, J.Tanaka, I.Tanihata, C.Unsworth Nuclear Force Imprints Revealed on the Elastic Scattering of Protons with 10C NUCLEAR REACTIONS 10C(p, p), E(cm)=4.15, 4.4 eV; measured reaction products, Ep, Ip; deduced σ(θ). Comparison with ab initio no-core shell model with continuum calculations.
doi: 10.1103/PhysRevLett.118.262502
2017TA30 Phys.Lett. B 774, 268 (2017) J.Tanaka, R.Kanungo, M.Alcorta, N.Aoi, H.Bidaman, C.Burbadge, G.Christian, S.Cruz, B.Davids, A.Diaz Varela, J.Even, G.Hackman, M.N.Harakeh, J.Henderson, S.Ishimoto, S.Kaur, M.Keefe, R.Krucken, K.G.Leach, J.Lighthall, E.Padilla-Rodal, J.S.Randhawa, P.Ruotsalainen, A.Sanetullaev, J.K.Smith, O.Workman, I.Tanihata Halo-induced large enhancement of soft dipole excitation of 11Li observed via proton inelastic scattering NUCLEAR REACTIONS 1H(11Li, p'), E=66 MeV; measured reaction products, Ep, Ip. 11Li; deduced σ(θ), B(E1). DWBA calculations.
doi: 10.1016/j.physletb.2017.09.079
2017WI14 Phys.Rev.Lett. 119, 242701 (2017) R.Wilkinson, G.Lotay, A.Lennarz, C.Ruiz, G.Christian, C.Akers, W.N.Catford, A.A.Chen, D.Connolly, B.Davids, D.A.Hutcheon, D.Jedrejcic, A.M.Laird, L.Martin, E.McNeice, J.Riley, M.Williams Direct Measurement of the Key Ec.m. = 456 keV Resonance in the Astrophysical 19Ne(p, γ)20Na Reaction and Its Relevance for Explosive Binary Systems NUCLEAR REACTIONS H(19Ne, γ), E=9.24 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ. 19Ne, 20Na; deduced resonance parameters, reaction rates. Comparison with available data.
doi: 10.1103/PhysRevLett.119.242701
2016AK05 Phys.Rev. C 94, 065803 (2016) C.Akers, A.M.Laird, B.R.Fulton, C.Ruiz, D.W.Bardayan, L.Buchmann, G.Christian, B.Davids, L.Erikson, J.Fallis, U.Hager, D.Hutcheon, L.Martin, A.St.J.Murphy, K.Nelson, D.Ottewell, A.Rojas, A.Spyrou Measurement of radiative proton capture on 18F and implications for oxygen-neon novae reexamined NUCLEAR REACTIONS 1H(18F, γ)19Ne, E=0.717 MeV/nucleon, [secondary 18F beam at ISAC-TRIUMF by 500 MeV proton beam incident on a silicon carbide target]; measured reaction products, extracted and ionized in a FEBIAD ion source, and filtered with a high-resolution mass separator, particle spectra using DRAGON recoil separator. 19Ne; deduced levels, resonances, 665-keV resonance strength, Γγ, resonant contributions to reaction rates as a function of temperature in the peak nova range; calculated reaction rates for T9=0.03 to 0.5. R-matrix analysis.
doi: 10.1103/PhysRevC.94.065803
2016KI03 Phys.Rev. C 93, 025802 (2016) O.S.Kirsebom, P.Bender, A.Cheeseman, G.Christian, R.Churchman, D.S.Cross, B.Davids, L.J.Evitts, J.Fallis, N.Galinski, A.B.Garnsworthy, G.Hackman, J.Lighthall, S.Ketelhut, P.Machule, D.Miller, S.T.Nielsen, C.R.Nobs, C.J.Pearson, M.M.Rajabali, A.J.Radich, A.Rojas, C.Ruiz, A.Sanetullaev, C.D.Unsworth, C.Wrede Measurement of lifetimes in 23MG NUCLEAR REACTIONS 3He(24Mg, α), E=3.125 MeV/nucleon; measured Eα, Iα, Eγ, Iγ, αγ-coincidence, level half-lives by DSAM and line-shape analysis. Experiment performed at ISAC-II-TRIUMF. Monte-Carlo simulations. 23Mg; deduced levels, resonances, resonance strengths. Relevance to 22Na(p, γ)23Mg reaction in classical novae. Comparison with previous measurements of level half-lives.
doi: 10.1103/PhysRevC.93.025802
2016LO03 Phys.Rev.Lett. 116, 132701 (2016) G.Lotay, G.Christian, C.Ruiz, C.Akers, D.S.Burke, W.N.Catford, A.A.Chen, D.Connolly, B.Davids, J.Fallis, U.Hager, D.A.Hutcheon, A.Mahl, A.Rojas, X.Sun Direct Measurement of the Astrophysical 38K(p, γ)39Ca Reaction and Its Influence on the Production of Nuclides toward the End Point of Nova Nucleosynthesis NUCLEAR REACTIONS 1H(38K, γ), E=386, 515, 689 keV; measured reaction products, Eγ, Iγ; deduced yields, resonance parameters, astrophysical reaction rates. Comparison with available data.
doi: 10.1103/PhysRevLett.116.132701
2016SA13 Phys.Lett. B 755, 481 (2016) A.Sanetullaev, R.Kanungo, J.Tanaka, M.Alcorta, C.Andreoiu, P.Bender, A.A.Chen, G.Christian, B.Davids, J.Fallis, J.P.Fortin, N.Galinski, A.T.Gallant, P.E.Garrett, G.Hackman, B.Hadinia, S.Ishimoto, M.Keefe, R.Krucken, J.Lighthall, E.McNeice, D.Miller, J.Purcell, J.S.Randhawa, T.Roger, A.Rojas, H.Savajols, A.Shotter, I.Tanihata, I.J.Thompson, C.Unsworth, P.Voss, Z.Wang Investigation of the role of 10Li resonances in the halo structure of 11Li(p, d)10Li through the transfer reaction NUCLEAR REACTIONS 1H(11Li, d), (11Li, p), E=5.7 MeV/nucleon; measured reaction products; deduced resonance parameters, spectroscopic factor, σ(θ). DWBA analysis.
doi: 10.1016/j.physletb.2016.02.060
2015JO05 Phys.Rev. C 91, 044312 (2015) M.D.Jones, Z.Kohley, T.Baumann, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, R.A.Haring-Kaye, A.N.Kuchera, B.Luther, S.Mosby, J.K.Smith, J.Snyder, A.Spyrou, S.L.Stephenson, M.Thoennessen Further insights into the reaction 14Be(CH2, X)10He NUCLEAR REACTIONS 2H(14Be, 10He), (14Be, 12He), E=59 MeV/nucleon, [14Be secondary beam from 9Be(18O, X), E=120 MeV/nucleon primary reaction using A1900 fragment separator]; measured particle spectra by ΔE-E detectors and neutron spectra by MONA array at NSCL-MSU facility; analyzed decay energy spectra and multiplicity distributions for 8He+n, 8He+2n 8He+4n, and 8He+2n with α removal. 10He; deduced resonance, no evidence for initial state effects based on the halo structure of the initial 14Be assuming a direct α-particle removal reaction. 12He; deduced no evidence for the existence of a low-lying (≤1 MeV) resonance in 12He.
doi: 10.1103/PhysRevC.91.044312
2015KO08 Phys.Rev. C 91, 034323 (2015) Z.Kohley, T.Baumann, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, B.Luther, E.Lunderberg, M.Jones, S.Mosby, J.K.Smith, A.Spyrou, M.Thoennessen Three-body correlations in the ground-state decay of 26O NUCLEAR REACTIONS 9Be(27F, 26O), E=82 MeV/nucleon, [27F secondary beam produced from projectile fragmentation of a 140 MeV/nucleon 48Ca primary beam]; measured (24O)nn-triple coin, three-body decay energy and angular correlations using MoNA-Sweeper setup at NSCL-MSU; deduced invariant mass and three-body correlations from the 26O ground-state resonance decay. Comparison with Monte-Carlo simulations using a phase-space, model, dineutron model, and three-body decay model. 26O; deduced 1σ upper limit of the ground-state resonance energy of 26O.
doi: 10.1103/PhysRevC.91.034323
2015KU04 Phys.Rev. C 91, 017304 (2015) A.N.Kuchera, A.Spyrou, J.K.Smith, T.Baumann, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, M.D.Jones, Z.Kohley, S.Mosby, W.A.Peters, M.Thoennessen Search for unbound 15Be states in the 3n+ 12Be channel NUCLEAR REACTIONS 9Be(17C, 15Be), E=55 MeV/nucleon, [17C secondary beam from 9Be(22Ne, X) primary reaction]; measured particle spectra, (12Be)n-coin using MONA array at NSCL-MSU facility; reconstructed two-, three-, and four-body decay energies of the 12Be+ neutron system using invariant mass spectroscopy. 15Be; search for predicted unbound 3/2+ level proved inconclusive. In the best fit analysis, 15Be g.s. is unbound with respect to 12Be.
doi: 10.1103/PhysRevC.91.017304
2015MA44 Phys.Rev.Lett. 115, 062701 (2015) V.Margerin, G.Lotay, P.J.Woods, M.Aliotta, G.Christian, B.Davids, T.Davinson, D.T.Doherty, J.Fallis, D.Howell, O.S.Kirsebom, D.J.Mountford, A.Rojas, C.Ruiz, J.A.Tostevin Inverse Kinematic Study of the 26gAl(d, p)27Al Reaction and Implications for Destruction of 26Al in Wolf-Rayet and Asymptotic Giant Branch Stars NUCLEAR REACTIONS 2H(26Al, p), E<500 MeV; measured reaction products; deduced energy levels, J, π. spectroscopic factor, astrophysical reaction rates. Comparison with available data.
doi: 10.1103/PhysRevLett.115.062701
2015RO16 Phys.Rev. C 92, 034316 (2015) W.F.Rogers, S.Garrett, A.Grovom, R.E.Anthony, A.Aulie, A.Barker, T.Baumann, J.J.Brett, J.Brown, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, A.Hamann, R.A.Haring-Kaye, J.Hinnefeld, A.R.Howe, N.T.Islam, M.D.Jones, A.N.Kuchera, J.Kwiatkowski, E.M.Lunderberg, B.Luther, D.A.Meyer, S.Mosby, A.Palmisano, R.Parkhurst, A.Peters, J.Smith, J.Snyder, A.Spyrou, S.L.Stephenson, M.Strongman, B.Sutherland, N.E.Taylor, M.Thoennessen Unbound excited states of the N=16 closed shell nucleus 24O NUCLEAR REACTIONS 9Be(26F, 24O), E=76 MeV/nucleon, [secondary 26F beam from 9Be(48Ca, X), E=140 MeV/nucleon primary reaction]; measured charged-particle spectra, E(n), I(n), (23O)n-coin using MONA-LISA array at NSCL-MSU. 24O; deduced decay energy spectrum, levels, J, π, difference between the first 2+ and 1+ states. Comparison with previous experimental results and theoretical calculations.
doi: 10.1103/PhysRevC.92.034316
2015TO10 Phys.Rev.Lett. 115, 052702 (2015) J.R.Tomlinson, J.Fallis, A.M.Laird, S.P.Fox, C.Akers, M.Alcorta, M.A.Bentley, G.Christian, B.Davids, T.Davinson, B.R.Fulton, N.Galinski, A.Rojas, C.Ruiz, N.de Sereville, M.Shen, A.C.Shotter Measurement of 23Na(α, p)26Mg at Energies Relevant to 26Al Production in Massive Stars NUCLEAR REACTIONS 23Na(α, p), E=1.1 MeV; measured reaction products, Ep, Ip; deduced σ, reaction rates. Comparison with the SMARAGD HF calculation.
doi: 10.1103/PhysRevLett.115.052702
2014CH14 Eur.Phys.J. A 50, 75 (2014) G.Christian, C.Akers, D.Connolly, J.Fallis, D.Hutcheon, K.Olchanski, C.Ruiz Design and commissioning of a timestamp-based data acquisition system for the DRAGON recoil mass separator
doi: 10.1140/epja/i2014-14075-0
2014CH15 Eur.Phys.J. A 50, 74 (2014) G.Christian, C.Akers, D.Connolly, J.Fallis, D.Hutcheon, K.Olchanski, C.Ruiz High statistic study of the reaction γp → pπ0η
doi: 10.1140/epja/i2014-14074-1
2013AK03 Phys.Rev.Lett. 110, 262502 (2013) C.Akers, A.M.Laird, B.R.Fulton, C.Ruiz, D.W.Bardayan, L.Buchmann, G.Christian, B.Davids, L.Erikson, J.Fallis, U.Hager, D.Hutcheon, L.Martin, A.St.J.Murphy, K.Nelson, A.Spyrou, C.Stanford, D.Ottewell, A.Rojas Measurement of Radiative Proton Capture on 18F and Implications for Oxygen-Neon Novae NUCLEAR REACTIONS 1H(18F, γ)19Ne, E=12.9 MeV; measured reaction products, nuclear recoils, time of flight; deduced reaction rates, resonance strength. Comparison with available data.
doi: 10.1103/PhysRevLett.110.262502
2013CH43 Phys.Rev. C 88, 038801 (2013) G.Christian, D.Hutcheon, C.Akers, D.Connolly, J.Fallis, C.Ruiz Strength of the Ec.m.=1113 keV resonance in 20Ne(p, γ)21Na NUCLEAR REACTIONS 1H(20Ne, γ)21Na, E(cm)=1163 keV/nucleon; measured recoil 21Na spectra, yield using DRAGON at ISAC-TRIUMF facility; deduced resonance strength of 1113-keV resonance, and compared to previous experimental measurements; discussed effect on s factor.
doi: 10.1103/PhysRevC.88.038801
2013FA10 Phys.Rev. C 88, 045801 (2013) J.Fallis, A.Parikh, P.F.Bertone, S.Bishop, L.Buchmann, A.A.Chen, G.Christian, J.A.Clark, J.M.D'Auria, B.Davids, C.M.Deibel, B.R.Fulton, U.Greife, B.Guo, U.Hager, C.Herlitzius, D.A.Hutcheon, J.Jose, A.M.Laird, E.T.Li, Z.H.Li, G.Lian, W.P.Liu, L.Martin, K.Nelson, D.Ottewell, P.D.Parker, S.Reeve, A.Rojas, C.Ruiz, K.Setoodehnia, S.Sjue, C.Vockenhuber, Y.B.Wang, C.Wrede Constraining nova observables: Direct measurements of resonance strengths in 33S(p, γ)34Cl NUCLEAR REACTIONS 1H(33S, γ)34Cl, E=194-514 MeV/nucleon; measured particle spectra, time-of-flight using DRAGON at ISAC-TRIUMF facility. 34Cl; deduced levels, resonances, resonance strengths, thermonuclear reaction rates for 33S(p, γ)34Cl reaction at T9=0.15-0.40, composition of 32,33,34S, 35,37Cl, 36,38Ar, 38,39K, 40Ca in oxygen-neon nova ejecta. Implications for nova nucleosynthesis.
doi: 10.1103/PhysRevC.88.045801
2013KO03 Phys.Rev. C 87, 011304 (2013) Z.Kohley, E.Lunderberg, P.A.DeYoung, A.Volya, T.Baumann, D.Bazin, G.Christian, N.L.Cooper, N.Frank, A.Gade, C.Hall, J.Hinnefeld, B.Luther, S.Mosby, W.A.Peters, J.K.Smith, J.Snyder, A.Spyrou, M.Thoennessen First observation of the 13Li ground state NUCLEAR REACTIONS 9Be(14Be, 13Li), [14Be secondary beam from 9Be(18O, X), E=120 MeV/nucleon primary beam], E=53.6 MeV/nucleon; measured 11Li fragment and neutron spectra, three-body (11Li+n+n), and two-body (11Li+n) decay energy spectra using Modular Neutron Array (MONA) for neutrons at NSCL facility. Monte Carlo and GEANT4 simulations. Glauber reaction model. 12,13Li; deduced levels, ground state resonance energies. Strong dineutron character for 13Li g.s. Comparison with previous studies.
doi: 10.1103/PhysRevC.87.011304
2013KO10 Phys.Rev.Lett. 110, 152501 (2013) Z.Kohley, T.Baumann, D.Bazin, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, M.Jones, E.Lunderberg, B.Luther, S.Mosby, T.Nagi, J.K.Smith, J.Snyder, A.Spyrou, M.Thoennessen Study of Two-Neutron Radioactivity in the Decay of 26O RADIOACTIVITY 26O(2n) [from 9Be(27F, p), E=82 MeV/nucleon]; measured decay products, En, In; deduced T1/2. Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.110.152501
2013KO28 Phys.Rev. C 88, 041601 (2013) Z.Kohley, G.Christian, T.Baumann, P.A.DeYoung, J.E.Finck, N.Frank, M.Jones, J.K.Smith, J.Snyder, A.Spyrou, M.Thoennessen Exploiting neutron-rich radioactive ion beams to constrain the symmetry energy NUCLEAR REACTIONS 9Be(32Mg, X), [secondary 32Mg beam from Be(48Ca, X), E=140 MeV/nucleon primary reaction], E=73 MeV/nucleon; measured neutron spectra by MoNA array and particle spectra by 4 Tm Sweeper magnet, (particle)n-coin at yield of fragments at NSCL, MSU facility; deduced average N/Z vs Z, multiplicity, velocity distribution, density dependence of the symmetry energy by comparison of the experimental data with the constrained molecular dynamics model (CoMD) constraints.
doi: 10.1103/PhysRevC.88.041601
2013MO12 Nucl.Phys. A909, 69 (2013) S.Mosby, N.S.Badger, T.Baumann, D.Bazin, M.Bennett, J.Brown, G.Christian, P.A.DeYoung, J.E.Finck, M.Gardner, J.D.Hinnefeld, E.A.Hook, E.M.Lunderberg, B.Luther, D.A.Meyer, M.Mosby, G.F.Peaslee, W.F.Rogers, J.K.Smith, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen Search for 21C and constraints on 22C NUCLEAR REACTIONS 9Be(22C, n21C), E=68 MeV/nucleon; measured En, In(\theta), E(20C fragment), I(20C fragment, \theta). 21,22C calculated double neutron halo nucleus low-lying levels, J, π, spectrometric factor using shell model, Goldhaber model with friction term. 21C deduced non-existence of bound state. 20C+n deduced scattering length.
doi: 10.1016/j.nuclphysa.2013.04.004
2013SN02 Phys.Rev. C 88, 031303 (2013) J.Snyder, T.Baumann, G.Christian, R.A.Haring-Kaye, P.A.DeYoung, Z.Kohley, B.Luther, M.Mosby, S.Mosby, A.Simon, J.K.Smith, A.Spyrou, S.Stephenson, M.Thoennessen First observation of 15Be NUCLEAR REACTIONS 2H(14Be, 15Be), E=59 MeV/nucleon, [secondary 14Be from 9Be(18O, X), E=120 MeV/nucleon primary reaction]; measured 14Be, and neutron spectra from decay of 15Be, TOF, production σ, (14Be)n-coin using MoNA array at NSCL-MSU facility. Decay energy spectrum of 15Be fitted with energy-dependent Breit-Wigner distribution. 15Be; deduced level, J, π, neutron-unbound resonance, width. Shell-model calculations.
doi: 10.1103/PhysRevC.88.031303
2013TH04 Acta Phys.Pol. B44, 543 (2013) M.Thoennessen, Z.Kohley, A.Spyrou, E.Lunderberg, P.A.DeYoung, H.Attanayake, T.Baumann, D.Bazin, B.A.Brown, G.Christian, D.Divaratne, S.M.Grimes, A.Haagsma, J.E.Finck, N.Frank, B.Luther, S.Mosby, T.Nagi, G.F.Peaslee, W.A.Peters, A.Schiller, J.K.Smith, J.Snyder, M.Strongman, A.Volya Observation of Ground-state Two-neutron Decay RADIOACTIVITY 16Be, 26O(2n); measured decay products, En, In; deduced decay energy spectra. Comparison with calculated two-neutron separation energies, T1/2, widths.
doi: 10.5506/APhysPolB.44.543
2013TH06 Nucl.Phys. A912, 1 (2013) M.Thoennessen, S.Mosby, N.S.Badger, T.Baumann, D.Bazin, M.Bennett, J.Brown, G.Christian, P.A.DeYoung, J.E.Finck, M.Gardner, E.A.Hook, B.Luther, D.A.Meyer, M.Mosby, W.F.Rogers, J.K.Smith, A.Spyrou, M.J.Strongman Observation of a low-lying neutron-unbound state in 19C NUCLEAR REACTIONS 9Be(22N, n18C), (22N, n19C), (22N, n20C), E=68 MeV/nucleon; measured carbon fragments, En, In, (carbon)n-coin. 19C deduced 76 keV resonance, low-lying level scheme near neutron drip line; calculated low-lying levels, J, π using different shell models.
doi: 10.1016/j.nuclphysa.2013.05.001
2013TH07 Nucl.Instrum.Methods Phys.Res. A729, 207 (2013) M.Thoennessen, G.Christian, Z.Kohley, T.Baumann, M.Jones, J.K.Smith, J.Snyder, A.Spyrou Novel techniques to search for neutron radioactivity RADIOACTIVITY 16B(2n); measured decay products, En, In; deduced new technique, T1/2 sensitivity. Decay in Target (DiT) and Decay in a Magnetic Field (DiMF) methods.
doi: 10.1016/j.nima.2013.07.035
2012CH02 Phys.Rev.Lett. 108, 032501 (2012) G.Christian, N.Frank, S.Ash, T.Baumann, D.Bazin, J.Brown, P.A.DeYoung, J.E.Finck, A.Gade, G.F.Grinyer, A.Grovom, J.D.Hinnefeld, E.M.Lunderberg, B.Luther, M.Mosby, S.Mosby, T.Nagi, G.F.Peaslee, W.F.Rogers, J.K.Smith, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen, M.Warren, D.Weisshaar, A.Wersal Exploring the Low-Z Shore of the Island of Inversion at N=19 NUCLEAR REACTIONS Be(29Ne, X)28F/27F, E=62 MeV/nucleon; measured reaction products, TOF; deduced 28F ground state energy as resonance in the 27F+n continuum, binding energy. Comparison with USDA/USDB shell model predictions.
doi: 10.1103/PhysRevLett.108.032501
2012CH12 Phys.Rev. C 85, 034327 (2012) G.Christian, N.Frank, S.Ash, T.Baumann, P.A.DeYoung, J.E.Finck, A.Gade, G.F.Grinyer, B.Luther, M.Mosby, S.Mosby, J.K.Smith, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen, M.Warren, D.Weisshaar, A.Wersal Spectroscopy of neutron-unbound 27, 28F NUCLEAR REACTIONS 9Be(29Ne, X)27F/28F, [29Ne secondary beam from 9Be(48Ca, X), E=140 MeV/nucleon primary beam], E=62 MeV/nucleon; measured particle spectra, energy loss, time-of-flight, (26F)n-, (27F)n-, (26F)nγ-coin, E(n), E(26,27F). MoNA array for neutrons, CAESAR array for γ rays. 28F; deduced ground-state as unbound resonance in 27F+n continuum, binding energy. 27F; deduced neutron-unbound level. Comparison with USDA/USDB shell model predictions.
doi: 10.1103/PhysRevC.85.034327
2012KO43 Phys.Rev.Lett. 109, 232501 (2012) Z.Kohley, J.Snyder, T.Baumann, G.Christian, P.A.DeYoung, J.E.Finck, R.A.Haring-Kaye, M.Jones, E.Lunderberg, B.Luther, S.Mosby, A.Simon, J.K.Smith, A.Spyrou, S.L.Stephenson, M.Thoennessen Unresolved Question of the 10He Ground State Resonance NUCLEAR REACTIONS C, 2H(14Be, 2n2p)10He, E=59 MeV/nucleon; measured reaction products, En, In; deduced ground state resonance parameters. Comparison with available data, 18O secondary beams.
doi: 10.1103/PhysRevLett.109.232501
2012LU07 Phys.Rev.Lett. 108, 142503 (2012) E.Lunderberg, P.A.DeYoung, Z.Kohley, H.Attanayake, T.Baumann, D.Bazin, G.Christian, D.Divaratne, S.M.Grimes, A.Haagsma, J.E.Finck, N.Frank, B.Luther, S.Mosby, T.Nagi, G.F.Peaslee, A.Schiller, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen Evidence for the Ground-State Resonance of 26O RADIOACTIVITY 26O(2n) [from Be(27F, p)26O, E=82 MeV/nucleon];measured decay products, En, In. 26O; deduced decay energy spectrum, evidence for the ground state or resonance in neutron unbound nucleus, T1/2 limit. Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.108.142503
2012SM08 Phys.Rev. C 86, 057302 (2012) J.K.Smith, T.Baumann, B.A.Brown, G.Christian, J.E.Finck, C.R.Hoffman, Z.Kohley, S.Mosby, J.F.Novak, S.J.Quinn, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen Neutron unbound states in 28Ne and 25F NUCLEAR REACTIONS 9Be(29Na, 28Ne), (26F, 25F), [secondary 29Na and 26F beam from 9Be(48Ca, X), E=140 MeV/nucleon primary reaction], E=102 MeV/nucleon; measured charged fragment spectra by TOF and energy loss, neutron spectra using MONA array at NSCL facility, decay energy spectra for 28Ne and 25F reconstructed from the 27Ne+n and 24F+n systems. 25F, 28Ne; deduced unbound levels, J, π, spectroscopic factors, Breit-Wigner resonance. Glauber reaction model analysis. Comparison with shell model calculations. NUCLEAR STRUCTURE 28Ne, 25F; calculated bound and unbound levels, J, π, spectroscopic factors for 27Ne+n system, widths. Shell model. Comparison with experimental data.
doi: 10.1103/PhysRevC.86.057302
2012SP01 Phys.Rev.Lett. 108, 102501 (2012) A.Spyrou, Z.Kohley, T.Baumann, D.Bazin, B.A.Brown, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, E.Lunderberg, S.Mosby, W.A.Peters, A.Schiller, J.K.Smith, J.Snyder, M.J.Strongman, M.Thoennessen, A.Volya First Observation of Ground State Dineutron Decay: 16Be RADIOACTIVITY 16Be(2n) [from Be(17B, p), E=53 MeV/nucleon]; measured decay products, En, In; deduced two-neutron separation energy.
doi: 10.1103/PhysRevLett.108.102501
2011SP01 Phys.Rev. C 84, 044309 (2011) A.Spyrou, J.K.Smith, T.Baumann, B.A.Brown, J.Brown, G.Christian, P.A.DeYoung, N.Frank, S.Mosby, W.A.Peters, A.Schiller, M.J.Strongman, M.Thoennessen, J.A.Tostevin Search for the 15Be ground state NUCLEAR REACTIONS 9Be(17C, 2p), E=55 MeV/nucleon, [17C secondary beam from 9Be(22Ne, X) primary reaction]; measured energy loss, time of flight, magnetic rigidity, Be fragment spectra and (Be)(n)-coin. 15Be; deduced g.s., J, π, decay mode, unbound energy. Comparison with shell model calculations.
doi: 10.1103/PhysRevC.84.044309
2010HA04 Phys.Rev. C 81, 021302 (2010) C.C.Hall, E.M.Lunderberg, P.A.DeYoung, T.Baumann, D.Bazin, G.Blanchon, A.Bonaccorso, B.A.Brown, J.Brown, G.Christian, D.H.Denby, J.Finck, N.Frank, A.Gade, J.Hinnefeld, C.R.Hoffman, B.Luther, S.Mosby, W.A.Peters, A.Spyrou, M.Thoennessen First observation of excited states in 12Li NUCLEAR REACTIONS Be(14B, 2p), E=53.4 MeV/nucleon; measured neutron and 11Li spectra from decay of 12Li, and (11Li)n-coin using Modular Neutron Array (MONA). 12Li; deduced levels, J, π. Comparisons with shell model calculations using WBP interaction.
doi: 10.1103/PhysRevC.81.021302
2010SP02 Phys.Lett. B 683, 129 (2010) A.Spyrou, T.Baumann, D.Bazin, G.Blanchon, A.Bonaccorso, E.Breitbach, J.Brown, G.Christian, A.DeLine, P.A.DeYoung, J.E.Finck, N.Frank, S.Mosby, W.A.Peters, A.Russel, A.Schiller, M.J.Strongman, M.Thoennessen First evidence for a virtual 18B ground state NUCLEAR REACTIONS Be(19C, pX)18B, E=62 MeV/nucleon; Be(17C, pX)16B, E=55 MeV/nucleon; measured decay energy spectra, (fragment)(neutron)-coin using time of flight technique with Modular Neutron Array (MoNA). 16B; deduced ground state energies. 17B; deduced level energies, J, π. 18B; calculated level energies, J, π. Comparison with shell model calculations using WBP interaction and other data. Secondary radioactive beam.
doi: 10.1016/j.physletb.2009.12.016
2009HO01 Phys.Lett. B 672, 17 (2009) C.R.Hoffman, T.Baumann, D.Bazin, J.Brown, G.Christian, D.H.Denby, P.A.DeYoung, J.E.Finck, N.Frank, J.Hinnefeld, S.Mosby, W.A.Peters, W.F.Rogers, A.Schiller, A.Spyrou, M.J.Scott, S.L.Tabor, M.Thoennessen, P.Voss Evidence for a doubly magic 24O NUCLEAR REACTIONS Be(26F, n23O), E=85 MeV/nucleon; measured neutron decay energy spectra, (fragment)(neutron)-coin. 24O deduced excited state energies, J, π. Comparison with other data and systematics. Secondary radioactive beam.
doi: 10.1016/j.physletb.2008.12.066
2008CH07 Nucl.Phys. A801, 101 (2008) G.Christian, W.A.Peters, D.Absalon, D.Albertson, T.Baumann, D.Bazin, E.Breitbach, J.Brown, P.L.Cole, D.Denby, P.A.DeYoung, J.E.Finck, N.Frank, A.Fritsch, C.Hall, A.M.Hayes, J.Hinnefeld, C.R.Hoffman, R.Howes, B.Luther, E.Mosby, S.Mosby, D.Padilla, P.V.Pancella, G.Peaslee, W.F.Rogers, A.Schiller, M.J.Strongman, M.Thoennessen, L.O.Wagner Production of nuclei in neutron unbound states via primary fragmentation of 48Ca NUCLEAR REACTIONS 9Be(48Ca, X)10Li/11,13Be/23O, E=60 MeV/nucleon; measured neutron decay energy spectra, (fragment)(neutron)-coin using sequential neutron decay spectroscopy technique. 10Li, 11,13Be, 23O observed unbound states.
doi: 10.1016/j.nuclphysa.2008.01.004
2008HO03 Phys.Rev.Lett. 100, 152502 (2008) C.R.Hoffman, T.Baumann, D.Bazin, J.Brown, G.Christian, P.A.DeYoung, J.E.Finck, N.Frank, J.Hinnefeld, R.Howes, P.Mears, E.Mosby, S.Mosby, J.Reith, B.Rizzo, W.F.Rogers, G.Peaslee, W.A.Peters, A.Schiller, M.J.Scott, S.L.Tabor, M.Thoennessen, P.J.Voss, T.Williams Determination of the N = 16 Shell Closure at the Oxygen Drip Line NUCLEAR REACTIONS Be(26F, 25O), E=85 MeV/nucleon; measured fragment, neutron energies and yields. 25O; deduced decay width.
doi: 10.1103/PhysRevLett.100.152502
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