NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = J.H.Barker Found 25 matches. 1986SO10 Phys.Rev. C34, 917 (1986) L.G.Sobotka, D.G.Sarantites, H.Puchta, F.A.Dilmanian, M.Jaaskelainen, M.L.Halbert, J.H.Barker, J.R.Beene, R.L.Ferguson, D.C.Hensley, G.R.Young Particle-Bound Excited State Yields Produced in the Reaction of 181 MeV 19F + 159Tb NUCLEAR REACTIONS 159Tb(19F, X), E=181 MeV; measured (particle)γ-coin for X=10Be, 11,12B, 12,13,14C, 14,15,17N, 16,17,18O; deduced particle-bound ejectile yields. 10Be, 11,12B, 12,13,14C, 14,15,17N, 16,17,18O deduced excited state population.
doi: 10.1103/PhysRevC.34.917
1983HA28 Phys.Scr. T5, 91 (1983) M.L.Halbert, J.H.Barker, J.R.Beene, R.L.Ferguson, D.C.Hensley, G.R.Young, F.A.Dilmanian, M.Jaaskelainen, H.Puchta, D.G.Sarantites, R.Woodward Heavy-Ion Reaction Mechanisms Studied with the Spin Spectrometer NUCLEAR REACTIONS 146Nd(20Ne, 5n), (20Ne, 6n), (20Ne, 7n), (20Ne, 8n), E=136 MeV; measured γ-multiplicity, σ vs multiplicity, excitation. 159Tb(19F, X), E=180 MeV; measured γ-multiplicity vs fragment mass, Z, σ(fragment θ) for X=C, B, Be, N, O, Ne. Comparison with sum rule predictions.
doi: 10.1088/0031-8949/1983/T5/014
1983JA04 Nucl.Phys. A396, 319c (1983) M.Jaaskelainen, D.G.Sarantites, F.A.Dilmanian, R.Woodward, H.Puchta, J.R.Beene, J.Hattula, M.L.Halbert, D.C.Hensley, J.H.Barker Evolution of Nuclear Shapes in 157-161Yb as a Function of Spin and Neutron Number NUCLEAR REACTIONS 146Nd(20Ne, 6n), (20Ne, 7n), E=136, 149 MeV; 146Nd(20Ne, 8n), 144Nd(20Ne, 6n), (20Ne, 7n), E=149 MeV; 146Nd(20Ne, 5n), E=136 MeV; measured continuum Eγ, Iγ, γ(θ) vs multiplicity. 157,158,159,160,161Yb deduced nuclear shapes.
doi: 10.1016/0375-9474(83)90028-3
1983SA10 Nucl.Phys. A400, 435c (1983) R.C.Sarantites, M.Jaaskelainen, F.A.Dilmanian, H.Puchta, R.Woodward, J.R.Beene, D.C.Hensley, M.L.Halbert, J.Hattula, J.H.Barker, R.Novotny, L.Adler, R.K.Choudhury, M.N.Namboodiri, R.P.Schmitt, J.B.Natowitz Research Highlights with the Spin Spectrometer NUCLEAR REACTIONS 146Nd(20Ne, 8n), E=136 MeV; 146Nd(20Ne, 6n), (20Ne, 7n), E=136, 149 MeV; 144Nd(20Ne, 6n), (20Ne, 7n), 146Nd(20Ne, 8n), E=149 MeV; measured continuum γ-spectra, γ-multiplicities; deduced fusion reaction, entry state energy, angular momentum dependences. 160,158,159Yb deduced effective moment of inertia vs spin, entry line energy vs γ-multiplicity, localized stretched dipole transition. 157,161Yb deduced localized stretched dipole transition.
doi: 10.1016/0375-9474(83)90448-7
1982JA08 Phys.Rev.Lett. 49, 1387 (1982) M.Jaaskelainen, D.G.Sarantites, R.Woodward, F.A.Dilmanian, H.Puchta, J.R.Beene, J.Hattula, M.L.Halbert, D.C.Hensley, J.H.Barker Evidence for a Prolate to Oblate Shape Change at High Spin in 160Yb NUCLEAR REACTIONS 146Nd(20Ne, 6n), E=136, 149 MeV; measured γ-multiplicity. 160Yb deduced entry state population, decay properties, shape change. Spin spectrometer.
doi: 10.1103/PhysRevLett.49.1387
1982SA21 Phys.Lett. 115B, 441 (1982) D.G.Sarantites, M.Jaaskelainen, R.Woodward, F.A.Dilmanian, D.C.Hensley, J.H.Barker, J.R.Beene, M.L.Halbert, W.T.Milner Population of the Entry States in Heavy-Ion Fusion Reactions NUCLEAR REACTIONS 146Nd(20Ne, 5n), (20Ne, 6n), (20Ne, 7n), E=136 MeV; measured σ vs γ-multiplicity, entry state distributions; deduced entrance channel fusion (L). Statistical model.
doi: 10.1016/0370-2693(82)90388-4
1981BE21 Phys.Rev. C23, 2463 (1981) J.R.Beene, M.L.Halbert, D.C.Hensley, R.A.Dayras, K.G.Young, D.G.Sarantites, J.H.Barker Fusion-Like Reactions of 16O with 154Sm: γ-ray multiplicity versus bombarding energy NUCLEAR REACTIONS 154Sm(16O, xn), (16O, αxn), E=111.1, 126.4, 141.1, 155.4, 168.4 MeV; measured σ(E), < Eγ >, γ-multiplicity for x=4-11; deduced incomplete fusion, γ-multiplicity systematics, nonstatistical neutron emission onset.
doi: 10.1103/PhysRevC.23.2463
1981YO06 Phys.Rev. C23, 2479 (1981) K.G.Young, D.G.Sarantites, J.R.Beene, M.L.Halbert, D.C.Hensley, R.A.Dayras, J.H.Barker Nonequilibrium Emission of Neutrons from Fusion-Like Reactions of 152-MeV 16O with 154Sm NUCLEAR REACTIONS 154Sm(16O, xn), E=151.9 MeV; measured σ(En, θn) for x=8-10; 154Sm(16O, xnα), E=151.9 MeV; measured σ(En, θn) for x=7, 8; deduced temperatures, equilibrium, preeqilibrium neutron yields, interaction times. Incomplete fusion, hotspot, prompt particle emission models.
doi: 10.1103/PhysRevC.23.2479
1980BA20 Phys.Rev.Lett. 45, 424 (1980) J.H.Barker, J.R.Beene, M.L.Halbert, D.C.Hensley, M.Jaaskelainen, D.G.Sarantites, R.Woodward Direct Evidence for a Narrow Window at High Angular Momentum in Incomplete-Fusion Reactions NUCLEAR REACTIONS 146Nd(16O, xnα), E=142 MeV; measured αγ-coin, side feeding; deduced narrow window at high angular momentum, no central collisions. Generalized incomplete fusion model.
doi: 10.1103/PhysRevLett.45.424
1980DA14 Phys.Rev. C22, 1485 (1980) R.A.Dayras, R.G.Stokstad, D.C.Hensley, M.L.Halbert, D.G.Sarantites, L.Westerberg, J.H.Barker Angular Momentum Transfer in the Reactions Induced by 166 MeV 20Ne on 63Cu NUCLEAR REACTIONS 63Cu(20Ne, X), E=166 MeV; measured σ(fragment E, θ, Z), γ-ray multiplicity, Xγ(θ); deduced relaxation times, diffusion coefficients, random angular momentum. 63Cu(12C, X), E=133 MeV; measured γ-ray multiplicity. Enriched target.
doi: 10.1103/PhysRevC.22.1485
1979DA01 Phys.Rev.Lett. 42, 697 (1979) R.A.Dayras, R.G.Stokstad, C.B.Fulmer, D.C.Hensley, M.L.Halbert, R.L.Robinson, A.H.Snell, D.G.Sarantites, L.Westerberg, J.H.Barker Randomly Oriented Angular Momentum in Strongly Damped Collisions NUCLEAR REACTIONS 63Cu(Ne, Xγ), E=168 MeV; measured γ-ray multiplicity, width, skewness of multiplicity distribution, Iγ(φ); deduced a random component in transferred angular momentum.
doi: 10.1103/PhysRevLett.42.697
1979GE05 Phys.Rev.Lett. 43, 1303 (1979) K.A.Geoffroy, D.G.Sarantites, M.L.Halbert, D.D.Hensley, R.A.Dayras, J.H.Barker Angular Momentum Transfer in Incomplete-Fusion Reactions NUCLEAR REACTIONS 154Sm(16O, 12C), (16O, 8Be), (16O, α), E=153 MeV; measured charged-particle E, θ correlation with γ-multiplicities; deduced L-transfer. Incomplete fusion.
doi: 10.1103/PhysRevLett.43.1303
1978BA37 Phys.Rev. C18, 119 (1978) J.H.Barker, D.G.Sarantites, O.Skeppstedt, E.Wallander, G.Alenius, S.-E.Arnell Multiplicity of the γ Cascades in the 61Cu Continuum: Dependence on Excitation Energy of the Entry States NUCLEAR REACTIONS 58Ni(α, pγ), E=17.0, 19.5 MeV; measured γ-multiplicities for cascades, side feeding in 61Cu continuum as function of excitation energy.
doi: 10.1103/PhysRevC.18.119
1978SA01 Phys.Rev. C17, 601 (1978) D.G.Sarantites, L.Westerberg, R.A.Dayras. M.L.Halbert, D.C.Hensley, J.H.Barker Angular-Momentum Effects in Pre-Equilibrium Processes NUCLEAR REACTIONS 150Nd(20Ne, xnγ), (20Ne, xnαγ), X=4-8, E=94.2, 110.7 MeV; 130Te(40Ar, xnγ), X=3-5, E=154.5 MeV; 166Er(α, xnγ), (α, xnαγ), X=2-8, E=67.6-95.3 MeV; measured σ(E, Eγ), γ-multiplicities; deduced J distributions in evaporation residues. Enriched target, anti-Compton Ge(Li)-NaI spectrometer.
doi: 10.1103/PhysRevC.17.601
1978SA17 Phys.Rev. C18, 774 (1978) D.G.Sarantites, L.Westerberg, M.L.Halbert, R.A.Dayras, D.C.Hensley, J.H.Barker Pre-Equilibrium Effects in Fusion of 12C and 158Gd NUCLEAR REACTIONS 158Gd(12C, xnγ), X=5-11, 158Gd(12C, xnαγ), X=4-10, E=112, 124.7, 141.7, 152.7, 164.7 MeV; measured σ(E), γ average multiplicity, variance, skewness. 158Gd(12C, xn2αγ), X=4-7, E=164.7 MeV; measured σ; deduced angular momentum removal by γ, particles, J distributions in evaporation residues, pre-equilibrium effects. Enriched target.
doi: 10.1103/PhysRevC.18.774
1978WE05 Phys.Rev.Lett. 41, 96 (1978) L.Westerberg, D.G.Sarantites, K.Geoffroy, R.A.Dayras, J.R.Beene, M.L.Halbert, D.C.Hensley, J.H.Barker Multipolarities of the Yrast and Statistical Cascades in the Reactions 150Nd(20Ne, xnγ) NUCLEAR REACTIONS 150Nd(20Ne, xnγ), E=115, 130 MeV; measured electron-, γ-spectra; deduced ICC of γ-continuum.
doi: 10.1103/PhysRevLett.41.96
1978WE10 Phys.Rev. C18, 796 (1978) L.Westerberg, D.G.Sarantites, D.C.Hensley, R.A.Dayras, M.L.Halbert, J.H.Barker Pre-Equilibrium Particle Emission from Fusion of 12C + 158Gd and 20Ne + 150Nd NUCLEAR REACTIONS 158Gd(12C, xnγ), X=7-11, 158Gd(12C, xnαγ), X=5-10, E=152 MeV; 150Nd(20Ne, xnγ), X=7-10, 150Nd(20Ne, xnαγ), X=6-9, E=174.8 MeV; measured σ(En, θ), σ(Eα, θ), average γ-multiplicity; deduced temperatures, pre-equilibrium effects. Enriched targets.
doi: 10.1103/PhysRevC.18.796
1976SA23 Phys.Rev. C14, 2138 (1976) D.G.Sarantites, J.H.Barker, M.L.Halbert, D.C.Hensley, R.A.Dayras, E.Eichler, N.R.Johnson, S.A.Gronemeyer Gamma-Ray Multiplicities in Evaporation Residues Formed in Bombardments of 150Nd by 20Ne NUCLEAR REACTIONS 150Nd(20Ne, xnγ), (20Ne, xnαγ), E=127.7-172.4 MeV; measured σ(E, Eγ), γ-ray multiplicities; deduced J-distributions in evaporation residues. Enriched target.
doi: 10.1103/PhysRevC.14.2138
1974BA03 Phys.Rev. C9, 607 (1974) Cumulative and Independent Population of Individual Levels via the 58Ni(α, pγ)61Cu and 58Ni(α, 2pγ)60Ni Compound-Nucleus Reactions: A Correlation between Level Cross Sections and Angular Momenta NUCLEAR REACTIONS 58Ni(α, pγ), (α, 2pγ), (α, npγ), (α, α'γ), E=19.67 MeV; measured σ(Ep, Eγ, θ(p)), pγ-coin. 60Ni, 60,61Cu deduced levels.
doi: 10.1103/PhysRevC.9.607
1974BA61 Phys.Rev. C10, 1407 (1974) Lifetimes of Levels in 56Co from Doppler-Shift Measurements via the 56Fe(p, n)56Co Reaction NUCLEAR REACTIONS 56Fe(p, nγ), E=7.3 MeV; measured DSA, Eγ, Iγ, γ(θ, t), γγ(θ). 56Co levels deduced B(E2), B(M1), γ-branching ratios, T1/2.
doi: 10.1103/PhysRevC.10.1407
1974SA01 Phys.Rev. C9, 603 (1974) D.G.Sarantites, J.H.Barker, N.-H.Lu Mean Lifetimes of the γ Cascades in the 61Cu Continuum NUCLEAR REACTIONS 58Ni(α, pγ), E=19.7 MeV; measured DSA. 61Cu deduced mean-T1/2 for γ-cascades from continuum states.
doi: 10.1103/PhysRevC.9.603
1973HO21 Nucl.Instrum.Methods 109, 3 (1973) E.J.Hoffman, D.M.Van Patter, D.G.Sarantites, J.H.Barker Line Shapes of Doppler Shifted γ-Rays from Coincidence and Singles Spectra in Measurements of Nuclear Lifetimes NUCLEAR REACTIONS 58,60Ni(α, pγ), E=10-12.3 MeV; measured pγ-coin., Eγ, DSA. 61,63Cu levels deduced T1/2.
doi: 10.1016/0029-554X(73)90446-1
1973SA19 Phys.Rev. C8, 629 (1973) D.G.Sarantites, J.H.Barker, N.-H.Lu, E.J.Hoffman, D.M.Van Patter Structure, Directional-Correlation, and Doppler-Shift Lifetime Measurements in 61Cu via 58Ni(4He, pγ) Reaction Spectrometry NUCLEAR REACTIONS 58Ni(α, pγ), E=10.0-20.0 MeV; measured γγ-coin, pγ-coin, DSA, Eγ, γ(θ). Deduced Q. 61Cu deduced levels, J, π, γ-mixing, T1/2, B(E2), B(M1), γ-branching.
doi: 10.1103/PhysRevC.8.629
1972BA98 Phys.Rev. C6, 1795 (1972) Elastic and Inelastic Scattering of α Particles from 138Ba NUCLEAR REACTIONS 138Ba(α, α), (α, α'), E=50 MeV; measured σ(θ). 138Ba deduced levels, J, π, β.
doi: 10.1103/PhysRevC.6.1795
1971BA80 Phys.Rev. C4, 2256 (1971) Elastic and Inelastic Scattering of α Particles and Protons from 144Sm NUCLEAR REACTIONS 144Sm(p, p), (p, p'), E=30 MeV; 144Sm(α, α), (α, α'), E=50 MeV; measured σ(θ). 144Sm levels deduced J, π, β.
doi: 10.1103/PhysRevC.4.2256
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