NSR Query Results
Output year order : Descending NSR database version of May 24, 2024. Search: Author = S.L.Hammond Found 10 matches. 2017TO16 Phys.Lett. B 773, 20 (2017) A.P.Tonchev, N.Tsoneva, C.Bhatia, C.W.Arnold, S.Goriely, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, J.Piekarewicz, R.Raut, G.Rusev, T.Shizuma, W.Tornow Pygmy and core polarization dipole modes in ^{206}Pb: Connecting nuclear structure to stellar nucleosynthesis NUCLEAR REACTIONS ^{208}Pb(γ, γ'), E=4.9-8.1 MeV; analyzed available data; deduced a range for the neutron-skin thickness of and a corresponding range for the slope of the symmetry energy, Maxwellian-averaged radiative σ.
doi: 10.1016/j.physletb.2017.07.062
2013RU01 Phys.Rev.Lett. 110, 022503 (2013) G.Rusev, N.Tsoneva, F.Donau, S.Frauendorf, R.Schwengner, A.P.Tonchev, A.S.Adekola, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, W.Tornow, A.Wagner Fine Structure of the Giant M1 Resonance in ^{90}Zr NUCLEAR REACTIONS ^{90}Zr(γ, γ'), E=7-11 MeV; measured reaction products, Eγ, Iγ; deduced dipole excitations, 1^{+} states, fine structure of the giant M1 resonance, B(M1). Comparison with three-phonon QPM calculations.
doi: 10.1103/PhysRevLett.110.022503
2012AN13 Phys.Rev. C 86, 051302 (2012); Erratum Phys.Rev. C 91, 039901 (2015) C.T.Angell, S.L.Hammond, H.J.Karwowski, J.H.Kelley, M.Krticka, E.Kwan, A.Makinaga, G.Rusev Evidence for radiative coupling of the pygmy dipole resonance to excited states NUCLEAR REACTIONS ^{142}Nd(γ, n), E=9.86-13.3 MeV; ^{142}Nd(polarized γ, γ'), E=4.2-9.7 MeV; measured Eγ, Iγ, branching ratio, σ(E) using High Intensity γ-ray Source (HIγS) at TUNL for (γ, γ'), and quasimonoenergetic γ-ray source at Tsukuba; deduced two distinct PDR peaks. Comparison with statistical-model calculations. Violation of Brink hypothesis.
doi: 10.1103/PhysRevC.86.051302
2012HA12 Phys.Rev. C 85, 044302 (2012) S.L.Hammond, A.S.Adekola, C.T.Angell, H.J.Karwowski, E.Kwan, G.Rusev, A.P.Tonchev, W.Tornow, C.R.Howell, J.H.Kelley Dipole response of ^{238}U to polarized photons below the neutron separation energy NUCLEAR REACTIONS ^{238}U(polarized γ, γ'), E=2.0-6.2 MeV; measured Eγ, Iγ, γ(θ), γ(linear pol), integrated cross sections using HIγS facility at TUNL. ^{238}U; deduced levels, J, π, multipolarity, widths, branching ratios, B(M1), B(E1), total γ-ray interaction cross section for E1. Systematics of E1 and M1 strengths for ^{232}Th, ^{236,238}U. Comparison with QRPA calculations.
doi: 10.1103/PhysRevC.85.044302
2011AD02 Phys.Rev. C 83, 034615 (2011) A.S.Adekola, C.T.Angell, S.L.Hammond, A.Hill, C.R.Howell, H.J.Karwowski, J.H.Kelley, E.Kwan Discovery of low-lying E1 and M1 strengths in ^{232}Th NUCLEAR REACTIONS ^{232}Th(γ, γ'), E=2-4 MeV; measured Eγ, Iγ, γγ(θ), integrated σ using HIγS facility; deduced widths. ^{232}Th; deduced levels, J, π, multipolarity, B(M1), B(E1), branching ratios. Comparison of scissors mode summed B(M1) strengths with those in ^{232}Th, ^{235,236,238}U, and with predictions of quasiparticle random-phase approximation (QRPA).
doi: 10.1103/PhysRevC.83.034615
2011KW01 Phys.Rev. C 83, 041601 (2011) E.Kwan, G.Rusev, A.S.Adekola, F.Donau, S.L.Hammond, C.R.Howell, H.J.Karwowski, J.H.Kelley, R.S.Pedroni, R.Raut, A.P.Tonchev, W.Tornow Discrete deexcitations in ^{235}U below 3 MeV from nuclear resonance fluorescence NUCLEAR REACTIONS ^{235}U(γ, γ'), E=1.6-3.0 MeV; measured Eγ, Iγ, γγ-coin, integrated cross sections, and widths using HIγS facility. ^{235}U; deduced levels, J, π, branching ratios. Comparison with quasiparticle random-phase approximation in deformed basis for dipole transitions.
doi: 10.1103/PhysRevC.83.041601
2011RU15 J.Phys.:Conf.Ser. 312, 092053 (2011) G.Rusev, A.S.Adekola, F.Donau, S.Frauendorf, S.L.Hammond, C.Huibregtse, J.H.Kelley, E.Kwan, R.Schwengner, A.P.Tonchev, W.Tornow, A.Wagner Fine structure of the giant M1 resonance in ^{90}Zr NUCLEAR REACTIONS ^{90}Zr(polarized γ, γ'), E=7-11 MeV; measured Eγ, Iγ(θ) using HPGe; deduced B(M1) fine structure; calculated B(M1) fine structure using shell model and QRPA.
doi: 10.1088/1742-6596/312/9/092053
2011TO17 J.Phys.:Conf.Ser. 312, 092058 (2011) A.P.Tonchev, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, R.Raut, G.Rusev, W.Tornow, N.Tsoneva Coarse and Fine Structure of the Pygmy Dipole Resonance NUCLEAR REACTIONS ^{138}Ba(polarized γ, γ), (polarized γ, γ'), E=5.4, 7.2, 8.5 MeV; measured Eγ, Iγ(θ) using HPGe with nuclear resonance fluorescence; deduced σ, M1, E1 asymmetry, GDR, PDR photoabsorption σ, E1 ground-state γ transition strength, resonant-shape; calculated E1, M1 γ transition strength distribution using QPM.
doi: 10.1088/1742-6596/312/9/092058
2010TO01 Phys.Rev.Lett. 104, 072501 (2010) A.P.Tonchev, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, G.Rusev, W.Tornow, N.Tsoneva Spectral Structure of the Pygmy Dipole Resonance NUCLEAR REACTIONS ^{138}Ba(γ, γ), (γ, γ'), E ≈ below one-neutron separation energy; measured Eγ, Iγ; deduced σ, energy levels, B(E1), B(M1). Comparison with QPM calculations.
doi: 10.1103/PhysRevLett.104.072501
2010TO09 Phys.Rev. C 82, 054620 (2010) A.P.Tonchev, S.L.Hammond, C.R.Howell, C.Huibregtse, A.Hutcheson, J.H.Kelley, E.Kwan, R.Raut, G.Rusev, W.Tornow, T.Kawano, D.J.Vieira, J.B.Wilhelmy Measurement of the ^{241}Am(γ, n)^{240}Am reaction in the giant dipole resonance region NUCLEAR REACTIONS ^{241}Am(γ, n), E=9.0-15.6 MeV; measured Eγ, Iγ, σ using HIγS facility. Giant dipole resonance region. Comparison with previous measurements and statistical nuclear-model calculations.
doi: 10.1103/PhysRevC.82.054620
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