NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = W.Tornow Found 246 matches. Showing 1 to 100. [Next]2023DE27 Eur.Phys.J. A 59, 198 (2023) J.Deary, M.Scheck, R.Schwengner, D.O'Donnell, D.Bemmerer, R.Beyer, Th.Hensel, A.R.Junghans, T.Kogler, S.E.Muller, K.Romer, K.Schmidt, S.Turkat, S.Urlass, A.Wagner, M.Bowry, P.Adsley, O.Agar, R.Chapman, F.C.L.Crespi, D.T.Doherty, U.Friman-Gayer, R.-D.Herzberg, J.Isaak, R.V.F.Janssens, T.Kroll, B.Loher, B.S.Nara Singh, P.von Neumann-Cosel, L.Pellegri, E.E.Peters, G.Rainovski, D.Savran, J.F.Smith, M.Spieker, P.G.Thirolf, S.Triambak, W.Tornow, M.Venhart, M.Wiedeking, O.Wieland, S.W.Yates, A.Zilges Photo-response of the N = Z nucleus 24Mg NUCLEAR REACTIONS 24Mg(γ, γ'), E<13 MeV; measured reaction products, Eγ, Iγ; deduced energy-integrated scattering σ, B(M1), B(E1). Comparison with available data. The ELBE accelerator of the Helmholtz-Zentrum Dresden-Rossendorf.
doi: 10.1140/epja/s10050-023-01111-7
2023HA27 Phys.Rev.Lett. 131, 052502 (2023) S.J.Haselschwardt, B.G.Lenardo, T.Daniels, S.W.Finch, F.Q.L.Friesen, C.R.Howell, C.R.Malone, E.Mancil, W.Tornow Observation of Low-Lying Isomeric States in 136Cs: A New Avenue for Dark Matter and Solar Neutrino Detection in Xenon Detectors NUCLEAR REACTIONS 136Xe(p, n), E=7 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, partial level scheme, isomeric state T1/2. Comparison with available data. The Triangle Universities Nuclear Laboratory.
doi: 10.1103/PhysRevLett.131.052502
2023JO08 Phys.Rev. C 108, 024315 (2023) S.R.Johnson, R.V.F.Janssens, U.Friman-Gayer, B.A.Brown, B.P.Crider, S.W.Finch, Krishichayan, D.R.Little, S.Mukhopadhyay, E.E.Peters, A.P.D.Ramirez, J.A.Silano, A.P.Tonchev, W.Tornow, S.W.Yates Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in 74Ge NUCLEAR REACTIONS 74Ge(polarized γ, γ'), E=3.1-5.44 MeV; measured Eγ, Iγ, γ(θ); deduced integrated exclusive scattering σ(E). 74Ge; deduced levels, J, π, branching ratios, transition intensities. Comparison to large-scale shell-model calculations with jj44b and JUN45 effective interactions. γ3-setup consisting of 6 HPGe detectors. Quasi-monoenergetic linearly polarized photon beams produced via Compton backscattering and provided by the High Intensity Gamma-Ray Source at TUNL.
doi: 10.1103/PhysRevC.108.024315
2023MA16 Appl.Radiat.Isot. 195, 110742 (2023) A.M.Marenco, G.Rusev, E.M.Bond, T.A.Bredeweg, S.W.Finch, J.R.Garcia, M.E.Gooden, Krishichayan, R.C.Malone, W.A.Moody, A.P.D.Ramirez, J.A.Silano, A.P.Tonchev, W.Tornow Cross section for inelastic neutron scattering from 193Ir at 6 MeV NUCLEAR REACTIONS 193Ir, Ir(n, n')193mIr, E=6 MeV; measured reaction products, X-rays; deduced σ. Comparison with available data, ENDF/B-VIII.0 library. The tandem lab of TUNL.
doi: 10.1016/j.apradiso.2023.110742
2023RA05 Phys.Rev. C 107, 054608 (2023) A.P.D.Ramirez, J.A.Silano, R.C.Malone, M.A.Stoyer, A.P.Tonchev, M.E.Gooden, J.B.Wilhelmy, S.W.Finch, C.R.Howell, Krishichayan, W.Tornow Fission product yields from the 238U(n, f) reaction at En = 4.6 MeV NUCLEAR REACTIONS 238U(n, F)86mKr/86Kr/88Kr/89Rb/91Sr/92Sr/94Y/97Nb/101Mo/104Tc/105Ru/129Sb/131Te/131Sb/133I/134Te/134I/135Xe/138Xe/138Cs/139Ba/141Ba/142Ba/142La/146Ce/146Pr/147Pr/84As/86Se/86Br/87Br/88Br/89Kr/90Kr/91Kr/91Rb/92Kr/93Kr/93Rb/93Sr/94Rb/94Sr/95Sr/96Sr/96mY/96Y/97mY/98Sr/98mY/99Zr/99Nb/100Y/100Zr/101Zr/101Nb/102Zr/103Tc/106Tc/130Sn/132Sn/133Sb/134mSb/135Te/136Te/136mI/137Xe/138I/139Xe/140Xe/140Cs/141Xe/142Cs/142Ba/143Cs/143Ba/144La/145Ce/148La, E=4.6 MeV; measured neutron time-of-flight, Eγ, Iγ; deduced cumulative fission product yields. Comparison to experimental and evaluated data from ENDF/B-VIII.0 and JEFF-3.3 libraries and with theoretical models using the GEF and FREYA codes. Cyclic activation technique using the RApid Belt-driven Irradiated Target Transfer System (RABITTS) at the 10 MV tandem Van de Graaff accelerator (TUNL).
doi: 10.1103/PhysRevC.107.054608
2022HO01 J.Phys.(London) G49, 010502 (2022) C.R.Howell, M.W.Ahmed, A.Afanasev, D.Alesini, J.R.M.Annand, A.Aprahamian, D.L.Balabanski, S.V.Benson, A.Bernstein, C.R.Brune, J.Byrd, B.E.Carlsten, A.E.Champagne, S.Chattopadhyay, D.Davis, E.J.Downie, J.M.Durham, G.Feldman, H.Gao, C.G.R.Geddes, H.W.Griesshammer, R.Hajima, H.Hao, D.Hornidge, J.Isaak, R.V.F.Janssens, D.P.Kendellen, M.Kovash, P.P.Martel, U.-G.Meissner, R.Miskimen, B.Pasquini, D.R.Phillips, N.Pietralla, D.Savran, M.R.Schindler, M.H.Sikora, W.M.Snow, R.P.Springer, C.Sun, C.Tang, B.Tiburzi, A.P.Tonchev, W.Tornow, C.A.Ur, D.Wang, H.R.Weller, V.Werner, Y.K.Wu, J.Yan, Z.Zhao, A.Zilges, F.Z.Zomer International workshop on next generation gamma-ray source
doi: 10.1088/1361-6471/ac2827
2022MA59 Phys.Lett. B 835, 137557 (2022) R.C.Malone, A.S.Crowell, L.C.Cumberbatch, B.A.Fallin, F.Q.L.Friesen, C.R.Howell, C.R.Malone, D.R.Ticehurst, W.Tornow, D.M.Markoff, B.J.Crowe, H.Witala Measurement of the 1S0 neutron-neutron effective range in neutron-deuteron breakup NUCLEAR REACTIONS 2H(n, X), E<18 MeV; measured reaction products, En, In; deduced σ(θ, E), neutron-neutron effective range parameter from neutron-neutron quasifree scattering in neutron-deuteron breakup. The tandem accelerator facility at the Triangle Universities Nuclear Laboratory.
doi: 10.1016/j.physletb.2022.137557
2022SA39 Phys.Rev. C 106, 044324 (2022) D.Savran, J.Isaak, R.Schwengner, R.Massarczyk, M.Scheck, W.Tornow, G.Battaglia, T.Beck, S.W.Finch, C.Fransen, U.Friman-Gayer, R.Gonzalez, E.Hoemann, R.V.F.Janssens, S.R.Johnson, M.D.Jones, J.Kleemann, Krishichayan, D.R.Little, D.O'Donnell, O.Papst, N.Pietralla, J.Sinclair, V.Werner, O.Wieland, J.Wilhelmy Model-independent determination of the dipole response of 66Zn using quasimonoenergetic and linearly polarized photon beams NUCLEAR REACTIONS 66Zn(polarized γ, γ'), E=5.6-9.9 MeV; measured Eγ, Iγ, γγ-coin; deduced elastic, inelastic and total photoabsorption σ(E), average ground-state branching ratio, ratio of M1 to E1 elastic σ(E). Comparison to other experimental results. γ3-detector setup consisting of HPGe and LaBr3:Ce detectors at HIγS facility of the TUNL at Duke University.
doi: 10.1103/PhysRevC.106.044324
2022TO13 Phys.Lett. B 835, 137576 (2022) W.Tornow, A.P.Tonchev, S.W.Finch, Krishichayan, X.B.Wang, A.C.Hayes, H.G.D.Yeomans, D.A.Newmark Neutral-current neutrino cross section and expected supernova signals for 40Ar from a three-fold increase in the magnetic dipole strength NUCLEAR REACTIONS 40Ar(γ, γ'), E=9.4-10.2 MeV; measured reaction products, Eγ, Iγ; calculated the neutral-current neutrino σ using shell model; deduced γ-ray energies, J, π, resonance parameters, B(M1), B(E1). The Nuclear Resonance Fluorescence (NRF) technique, the High-Intensity Gamma-Ray Source (HIγS) of the Triangle Universities Nuclear Laboratory (TUNL).
doi: 10.1016/j.physletb.2022.137576
2021FI02 Phys.Rev. C 103, 044609 (2021) S.W.Finch, M.Bhike, Krishichayan, J.Soter, W.Tornow 169Tm(n, 2n) 168Tm and 169Tm (n, 3n) 167Tm cross-section measurements from 15 to 21 MeV NUCLEAR REACTIONS 169Tm(n, 2n), (n, 3n)168Tm/167Tm, E=15-21 MeV; measured Eγ, Iγ, σ(E) by activation method using monoenergetic neutron beams produced in 3H(d, n), E=12 MeV reaction at the FN tandem accelerator facility at TUNL. Comparison with previous experimental data, and evaluations in ENDF/B-VIII.0. Relevance to reaction-in-flight neutron yields for example studying properties of d-t plasma created in inertial confinement fusion laser shots at the NIF-LLNL.
doi: 10.1103/PhysRevC.103.044609
2021ID01 Phys.Rev. C 103, 054302 (2021) K.E.Ide, T.Beck, V.Werner, M.Berger, S.W.Finch, U.Friman-Gayer, J.Kleemann, Krishichayan, B.Loher, O.Papst, N.Pietralla, D.Savran, W.Tornow, M.Weinert, J.Wiederhold, A.Zilges E2 decay characteristics of the M1 scissors mode of 152Sm NUCLEAR REACTIONS 152Sm(polarized γ, γ'), E=3 MeV; measured Eγ, Iγ, γ(polarization azimuthal asymmetry) by nuclear resonance fluorescence (NRF) method using four HPGe detectors at the HIγS facility at TUNL. 152Sm; deduced levels, J, π, B(M1), B(E1), γ-branching ratios to the ground state and the first 2+ state, E2/M1 multipole mixing ratios, B(E2), summed scissors mode B(M1). Comparison with predictions of interacting boson model-2 (IBM-2); predicted energy and transition strength of the 2+ mixed-symmetry state.
doi: 10.1103/PhysRevC.103.054302
2021IS05 Phys.Rev. C 103, 044317 (2021) J.Isaak, D.Savran, B.Loher, T.Beck, U.Friman-Gayer, Krishichayan, N.Pietralla, V.Yu.Ponomarev, M.Scheck, W.Tornow, V.Werner, A.Zilges, M.Zweidinger Dipole response in 128, 130Te below the neutron threshold NUCLEAR REACTIONS 128,130Te(γ, γ'), (polarized γ, γ'), E=6.0, 9.13 MeV for 128Te and 6.4, 8.5 MeV for 130Te from Darmstadt high-intensity photon beams (DHIPS), and 2.76-8.92 MeV for 128Te and 5.5-8.5 MeV for 130Te linearly polarized and quasimonochromatic photon beams from TUNL HIγS facility; measured Eγ, Iγ, γγ(θ), γ(linear polarization). 128,130Te; deduced levels below the neutron threshold, pygmy dipole resonance (PDR), J, π, γ-branching ratios to the first excited 2+ states, Γ02/Γ, photoabsorption cross sections, B(E1), dominant 1- states. Comparison with predictions of quasiparticle phonon model. Detailed data for levels given in the Supplemental Material of the paper.
doi: 10.1103/PhysRevC.103.044317
2021KL04 Phys.Rev. C 104, L061302 (2021) J.Kleemann, T.Beck, U.Friman-Gayer, N.Pietralla, V.Werner, S.W.Finch, J.Kotila, Krishichayan, B.Loher, H.Pai, O.Papst, W.Tornow, M.Weinert, A.Zilges Majorana parameters of the interacting boson model of nuclear structure and their implication for 0νββ decay NUCLEAR REACTIONS 150Nd(polarized γ, γ'), E=2994 keV; 150Sm(polarized γ, γ'), E=3113 keV; measured Eγ, Iγ, γ(θ), γ(linear polarization) at the High Intensity γ-ray Source (HIγS) of Duke University. 150Sm, 150Nd; deduced γ-branching ratios from the 1+ scissors mode state to the first excited 0+ and second 2+ state in 150Nd, negative parity for the 3082-keV in 150Sm, J=1 level, in disagreement with positive parity assigned in the ENSDF database, and confirmed 1+ for the 2994-keV level in 150Nd; calculated positive-parity levels and B(M1) for 1+ scissors mode (SCM) states using IBM-2, and compared with experimental data in the ENSDF database. Relevance to 0νββ decay mode of 150Nd. RADIOACTIVITY 150Nd(2β-); calculated nuclear matrix elements (NMEs) for 0νββ decay to the g.s. and the first excited 0+ state in 150Sm using interacting boson model-2 (IBM-2), and compared with predictions of energy density-functional (EDF) method; deduced strong constraints for the Majorana parameters.
doi: 10.1103/PhysRevC.104.L061302
2021MA62 Phys.Lett. B 820, 136569 (2021) K.R.Mashtakov, V.Yu.Ponomarev, M.Scheck, S.W.Finch, J.Isaak, M.Zweidinger, O.Agar, C.Bathia, T.Beck, J.Beller, M.Bowry, R.Chapman, M.M.R.Chishti, U.Friman-Gayer, L.P.Gaffney, P.E.Garrett, E.T.Gregor, J.M.Keatings, U.Koster, B.Loher, A.D.MacLean, D.O'Donnell, H.Pai, N.Pietralla, G.Rainovski, M.Ramdhane, C.Romig, G.Rusev, D.Savran, G.S.Simpson, J.Sinclair, K.Sonnabend, P.Spagnoletti, A.P.Tonchev, W.Tornow Structure of high-lying levels populated in the 96Y → 96Zr β decay RADIOACTIVITY 96Y(β-) [from 235U(n, F), E thermal]; measured decay products, Eγ, Iγ, Eβ, Iβ; deduced γ-ray energies, B(E1), branching ratios, Gamow-Teller transition probabilities B(GT). Quasiparticle Phonon Model. Institut Laue Langevin (ILL), LOHENGRIN separator.
doi: 10.1016/j.physletb.2021.136569
2021SC06 Phys.Rev. C 103, 024312 (2021) R.Schwengner, R.Massarczyk, M.Scheck, W.Tornow, G.Battaglia, T.Beck, D.Bemmerer, N.Benouaret, R.Beyer, M.Butterling, F.Fiedler, S.W.Finch, C.Fransen, U.Friman-Gayer, A.Frotscher, R.Gonzalez, M.Grieger, A.Hartmann, T.Hensel, E.Hoemann, H.Hoffmann, R.V.F.Janssens, S.Johnson, M.D.Jones, A.R.Junghans, N.Kelly, J.Kleemann, Krishichayan, D.R.Little, F.Ludwig, S.E.Muller, D.O'Donnell, O.Papst, E.Pirovano, J.Sinclair, M.P.Takacs, S.Turkat, S.Urlass, A.Wagner, V.Werner, O.Wieland, J.Wilhelmy Electric and magnetic dipole strength in 66Zn NUCLEAR REACTIONS 66Zn(γ, γ'), (polarized γ, γ'), E=7.5, 13.4, MeV unpolarized bremsstrahlung from γELBE facility, and E=4.3, 4.4, 4.55, 4.7, 4.85, 5.0, 5.15, 5.3, 5.45, 5.6, 5.75, 5.9, 6.1, 6.3, 6.5, 6.7, 6.9, 7.1, 7.3, 7.5, 7.7, 7.9, 8.15, 8.4, 8.65, 8.9, 9.15, 9.4, 9.65, 9.9 MeV quasimonoenergetic and linearly polarized photon beams from HIγS facility; measured Eγ, Iγ, γγ(θ), γ(linear polarization) using four escape-suppressed HPGe detectors at γELBE and using two HPGe detectors at HIγS. 66Zn; deduced 128 J=1 levels up to 11.02 MeV excitation, pygmy dipole resonances (PDR), J, π, energy-integrated scattering σ, Γ02/Γ, photoabsorption σ, photon strength functions, B(M1). Comparison of measured photoabsorption cross sections with experimental values in 54Fe(γ, γ'), and with calculations using TALYS code as in the 2019 library, and from the three Lorentz functions (TLO). Comparison of B(M1) strengths with shell-model calculations using the jj44c Hamiltonian. Comparison of deduced photon strength functions with those from 64Ni(p, p'γ).
doi: 10.1103/PhysRevC.103.024312
2021TO04 Phys.Rev. C 103, 044612 (2021) Potential neutron-induced γ-ray background on natural tellurium relevant to 130Te 0νββ decay searches at the CUORE and SNO+ detectors NUCLEAR REACTIONS 126,128,130Te(n, n'γ), E=3.6, 4.5, 6.0, 8.0, 10.0 MeV produced in 2H(d, n)3He reaction at the TUNL tandem accelerator; measured Eγ, Iγ, time-of-flight (TOF) spectrum, σ(E, θ) by activation method. Relevance to information on potential backgrounds in the 0νββ decay searches of 130Te at the CUORE and SNO+ experiments on double-beta decay using natural tellurium.
doi: 10.1103/PhysRevC.103.044612
2020BE22 Phys.Rev.Lett. 125, 092501 (2020) T.Beck, V.Werner, N.Pietralla, M.Bhike, N.Cooper, U.Friman-Gayer, J.Isaak, R.V.Jolos, J.Kleemann, Krishichayan, O.Papst, W.Tornow, C.Bernards, B.P.Crider, R.S.Ilieva, B.Loher, C.Mihai, F.Naqvi, S.Pascu, E.E.Peters, F.M.Prados-Estevez, T.J.Ross, D.Savran, J.R.Vanhoy, A.Zilges ΔK = 0 m1 Excitation Strength of the Well-Deformed Nucleus 164Dy from K Mixing NUCLEAR REACTIONS 164Dy(γ, γ'), E=3-3.2 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, B(M1), reduced relative decay-intensity ratios, excitation strengths.
doi: 10.1103/PhysRevLett.125.092501
2020MA12 Phys.Rev. C 101, 034002 (2020) R.C.Malone, A.S.Crowell, L.C.Cumberbatch, B.A.Fallin, F.Q.L.Friesen, C.R.Howell, C.R.Malone, D.R.Ticehurst, W.Tornow, D.M.Markoff, B.J.Crowe, H.Witala Neutron-neutron quasifree scattering in neutron-deuteron breakup at 10 MeV NUCLEAR REACTIONS 2H(n, 2n), E=10.0 MeV; measured En, In, nn-coin, and differential σ(θ) of neutron-neutron quasi-free scattering (QSF) in neutron-deuteron breakup using isotopically enriched deuterated polyethylene CD2 target, and neutron time-of-flight technique for neutrons detected using liquid scintillator detectors at TUNL; deduced deuteron breakup cross section. Comparison with few-nucleon calculations using CD Bonn nuclear potential in the Faddeev formalism.
doi: 10.1103/PhysRevC.101.034002
2020PA32 Phys.Rev. C 102, 034323 (2020) O.Papst, V.Werner, J.Isaak, N.Pietralla, T.Beck, C.Bernards, M.Bhike, N.Cooper, B.P.Crider, U.Friman-Gayer, J.Kleemann, Krishichayan, B.Loher, F.Naqvi, E.E.Peters, F.M.Prados-Estevez, R.S.Ilieva, T.J.Ross, D.Savran, W.Tornow, J.R.Vanhoy Photo response of 164Dy NUCLEAR REACTIONS 164Dy(polarized γ, γ'), E=4.0-7.7 MeV; measured Eγ, Iγ, γ(polarization azimuthal asymmetry) using four HPGe detectors at the HIγS facility of TUNL. 164Dy; deduced levels, J, π, energy-integrated cross sections, widths, B(E1), B(M1), γ-branching ratios to the ground state and the first 2+ state, mean population ratios of the first and second 2+ states, and first 3+ state, photon strength function (PSF) and nuclear level density (NLD). Comparison with statistical model calculations.
doi: 10.1103/PhysRevC.102.034323
2020SC07 Phys.Rev. C 101, 064303 (2020) R.Schwengner, R.Massarczyk, R.Beyer, M.Bhike, B.A.Brown, Krishichayan, K.Sieja, W.Tornow, D.Bemmerer, M.Butterling, V.Derya, M.Dietz, F.Fiedler, U.Friman-Gayer, A.Frotscher, M.Grieger, A.Hartmann, A.R.Junghans, T.Kogler, F.Ludwig, B.Lutz, H.Pai, T.Szucs, M.P.Takacs, A.Wagner Electric and magnetic dipole strength in 54Fe NUCLEAR REACTIONS 54Fe(polarized γ, γ'), E=4.3-13.0 MeV; measured Eγ, Iγ, γ(θ), γ(polarization asymmetry), and integrated scattering cross sections, absolute photoabsorption σ(E) using HPGe detectors at the γELBE facility of the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), and at the HIγS facility at TUNL. 54Fe; deduced levels, J, π, B(E1), B(M1). Comparison with shell-model predictions.
doi: 10.1103/PhysRevC.101.064303
2020SI09 Eur.Phys.J. A 56, 105 (2020) J.Sinclair, M.Scheck, S.W.Finch, Krishichayan, U.Friman-Gayer, W.Tornow, G.Battaglia, T.Beck, R.Chapman, M.M.R.Chishti, Ch.Fransen, R.Gonzales, E.Hoemann, J.Isaak, R.V.F.Janssens, D.A.Jaroszynski, S.Johnson, M.D.Jones, J.M.Keatings, N.Kelly, J.Kleemann, D.Little, B.Loher, K.R.Mashtakov, M.Muscher, D.O'Donnell, O.Papst, E.E.Peters, D.Savran, M.Schilling, R.Schwengner, P.Spagnoletti, M.Spieker, V.Werner, J.Wilhelmy, O.Wieland, S.W.Yates, A.Zilges Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes
doi: 10.1140/epja/s10050-020-00118-8
2020WI09 Phys.Rev. C 102, 044327 (2020) J.Wilhelmy, M.Muscher, G.Rusev, R.Schwengner, R.Beyer, M.Bhike, P.Erbacher, F.Fiedler, U.Friman-Gayer, J.Glorius, R.Greifenhagen, S.Hammer, T.Hensel, J.Isaak, A.R.Junghans, Krishichayan, B.Loher, S.E.Muller, N.Pietralla, S.Reinicke, D.Savran, P.Scholz, K.Sonnabend, T.Szucs, M.Tamkas, W.Tornow, S.Turkat, A.Wagner, A.Zilges Dipole response of 87Rb and its impact on the 86Rb (n, γ) 87Rb cross section NUCLEAR REACTIONS 87Rb(γ, γ'), E=8.2, 13.2 MeV bremsstrahlung beam; measured Eγ, Iγ, γ(θ) using four HPGe detectors at the γ-ELBE facility in Dresden. 87Rb(polarized γ, γ'), E=5.10, 5.30, 5.50, 5.75, 6.00, 6.25, 6.50, 6.75, 7.00, 7.25, 7.50, 7.80, 8.10, 8.40, 8.70, 9.00, 9.30, 9.60 MeV; measured Eγ, Iγ, azimuthal asymmetry using four LaBr3:Ce scintillators and four HPGe detectors at the HIγS facility of TUNL; deduced energy-integrated σ(excitation energy), γ-ray sum spectra, photoabsorption σ(E), E1-photon strength functions (PSFs), nuclear level densities (NLDs), Thomas-Reiche-Kuhn (TRK) sum rule. Comparison with QRPA calculations for PSFs, and microscopic Hartree-Fock-Bogolyubov calculations with Skyrme and Gogny forces for NLDs. 87Rb; deduced 256 discrete levels from 845 to 10005 keV, J, π, gΓ02/Γ, γ-ray branching ratios for selected levels, as listed in supplemental material. 86Rb(n, γ), kT=5-100 keV; deduced Maxwellian cross sections (MACSs) for different PSF and NLD inputs, and compared to data in KADoNiS database.
doi: 10.1103/PhysRevC.102.044327
2019GA11 Phys.Rev.Lett. 122, 192501 (2019) A.Gando, Y.Gando, T.Hachiya, M.Ha Minh, S.Hayashida, Y.Honda, K.Hosokawa, H.Ikeda, K.Inoue, K.Ishidoshiro, Y.Kamei, K.Kamizawa, T.Kinoshita, M.Koga, S.Matsuda, T.Mitsui, K.Nakamura, A.Ono, N.Ota, S.Otsuka, H.Ozaki, Y.Shibukawa, I.Shimizu, Y.Shirahata, J.Shirai, T.Sato, K.Soma, A.Suzuki, A.Takeuchi, K.Tamae, K.Ueshima, H.Watanabe, D.Chernyak, A.Kozlov, S.Obara, S.Yoshida, Y.Takemoto, S.Umehara, K.Fushimi, S.Hirata, B.E.Berger, B.K.Fujikawa, J.G.Learned, J.Maricic, L.A.Winslow, Y.Efremenko, H.J.Karwowski, D.M.Markoff, W.Tornow, T.O'Donnell, J.A.Detwiler, S.Enomoto, M.P.Decowski, J.Menendez, R.Dvornicky, F.Simkovic Precision Analysis of the 136Xe Two-Neutrino ββ Spectrum in KamLAND-Zen and Its Impact on the Quenching of Nuclear Matrix Elements RADIOACTIVITY 136Xe(2β-); measured decay products, Eβ, Iβ; deduced nuclear matrix elements.
doi: 10.1103/PhysRevLett.122.192501
2019GA26 Phys.Rev. C 100, 034305 (2019) U.Gayer, T.Beck, M.Bhike, J.Isaak, N.Pietralla, P.C.Ries, D.Savran, M.Schilling, W.Tornow, V.Werner Experimental M1 response of 40Ar as a benchmark for neutrino-nucleus scattering calculations NUCLEAR REACTIONS 40Ar(polarized γ, γ'), E=4.44, 5.40, 5.65, 5.90, 6.10, 6.30, 6.50, 6.70, 6.90, 7.22, 7.55 MeV from High-Intensity γ-Ray Source (HIγS) at TUNL; measured Eγ, Iγ, azimuthal asymmetry using four HPGe detectors. 40Ar; deduced levels, J, π, integrated cross sections, lower limits for B(E1) and B(M1), average branching ratio to the first 2+ state, B(E1), B(M1), total M1 strength; results provide constraints on theoretical cross section of solar and supernova neutrinos with 40Ar. Comparison with large-scale shell model shell-model calculations for 1+ states in the sdfp space. Comparison with previous experimental results and evaluated data in the ENSDF database. Benchmarking of inelastic neutral current neutrino-nucleus scattering cross sections.
doi: 10.1103/PhysRevC.100.034305
2019IS02 Phys.Lett. B 788, 225 (2019) J.Isaak, D.Savran, B.Loher, T.Beck, M.Bhike, U.Gayer, Krishichayan, N.Pietralla, M.Scheck, W.Tornow, V.Werner, A.Zilges, M.Zweidinger The concept of nuclear photon strength functions: A model-independent approach via (γ(pol), g'γ") reactions NUCLEAR REACTIONS 128Te(polarized γ, γ'γ'), E=3-9 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced lack of a unique photon strength function consistent with the uncertainties of the measurement.
doi: 10.1016/j.physletb.2018.11.038
2019KR10 Phys.Rev. C 100, 014608 (2019) Krishichayan, M.Bhike, C.R.Howell, A.P.Tonchev, W.Tornow Fission product yield measurements using monoenergetic photon beams NUCLEAR REACTIONS 235,238U, 239Pu(polarized γ, F)84Br/85mKr/87Kr/88Kr/91Sr/92Sr/92Y/93Y/94Y/95Zr/97Zr/99Mo/103Ru/104Tc/105Ru/105Rh/115Cd/127Sb/128Sn/129Sb/130Sb/131Sb/131I/132Te/132Cs/133Te/133I/134Te/135I/136Cs/138Cs/139Ba/140Ba/141Ba/141Ce/142La/143Ce/146Pr/147Nd/149Nd/151Pm, E=13 MeV; measured fission fragments, Eγ, Iγ, fission product yields (FPY) using dual fission chamber for fission fragments and offline γ detection at TUNL-HIγS facility. Comparison with previous experimental neutron- and photon-induced fission product yields. RADIOACTIVITY 91,92Sr, 142La(β-)[from 235,238U, 239Pu(polarized γ, F), E=13 MeV at TUNL-HIγS facility]; measured half-lives of decay of 91Sr, 92Sr, and 142La, and compared with values from ENSDF database at NNDC.
doi: 10.1103/PhysRevC.100.014608
2019RI02 Phys.Rev. C 100, 021301R (2019) P.C.Ries, H.Pai, T.Beck, J.Beller, M.Bhike, V.Derya, U.Gayer, J.Isaak, B.Loher, Krishichayan, L.Mertes, N.Pietralla, C.Romig, D.Savran, M.Schilling, W.Tornow, S.Typel, V.Werner, J.Wilhelmy, A.Zilges, M.Zweidinger Valence-shell dependence of the pygmy dipole resonance: E1 strength difference in 50, 54Cr NUCLEAR REACTIONS 50,54Cr(γ, γ'), (polarized γ, γ'), E=7.5, 9.5 MeV bremsstrahlung beam from Darmstadt, and 5.5-9.8 MeV Compton-scattered polarized beam from TUNL; measured Eγ, Iγ, azimuthal angular distributions, integrated cross sections using nuclear resonance fluorescence (NRF) method at the Darmstadt High Intensity Photon Setup (DHIPS), and at the High-Intensity γ-ray Source facility (HIγS) of TUNL. 50,54Cr; deduced levels, pygmy dipole resonances (PDR), J, π, widths of transitions to g.s., branching ratios, B(E1), B(M1), B(E2), Thomas-Reiche-Kuhn (TRK) energy-weighted sum rule for 50,52,54Cr; calculated neutron skin thicknesses for 48,49,50,51,52,53,54,55,56Cr.
doi: 10.1103/PhysRevC.100.021301
2019TA11 Nucl.Phys. A987, 79 (2019) M.Tamkas, E.Aciksoz, J.Isaak, T.Beck, N.Benouaret, M.Bhike, I.Boztosun, A.Durusoy, U.Gayer, Krishichayan, B.Loher, N.Pietralla, D.Savran, W.Tornow, V.Werner, A.Zilges, M.Zweidinger Low-lying dipole strength in the well-deformed nucleus 156Gd NUCLEAR REACTIONS 156Gd(γ, γ), E=7.1 MeV[bremsstrahlung end-point energy]; measured Eγ, Iγ using three HPGe with BGO active anti-Compton shield; deduced γ-ray energy spectra; 156Gd(polarized γ, γ), E=2.9-6.2 MeV[linearly polarized quasi-monochromatical photon beams from laser Compton backscattering]; measured Eγ, Iγ, γγ-coin at High Intensity γ-ray Source (HIγS) at TUNL; deduced γ-ray measured and deconvoluted energy spectra, asymmetries for observed single states and average asymmetry for each beam energy setting using deconvoluted spectra, expectation B(E1), B(M1) transition values; deduced, extracted photo absorption σγ vs E* and its decomposition to the gs and to the first excited state.
doi: 10.1016/j.nuclphysa.2019.03.014
2019TO04 Nucl.Instrum.Methods Phys.Res. A928, 79 (2019) W.Tornow, M.Bhike, S.W.Finch, Krishichayan Exploratory study of the 180mTa(γ, γ')180Ta reaction with mono-energetic low-energy photon beams at HIγS NUCLEAR REACTIONS 180mTa(γ, γ')180Ta, E=1.56-3.7 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with TALYS calculations. RADIOACTIVITY 180Ta(EC); measured decay products, X-rays; deduced γ-ray energies and intensities.
doi: 10.1016/j.nima.2019.03.036
2018BH09 J.Phys.(London) G45, 125101 (2018) M.Bhike, J.H.Esterline, B.Fallin, S.W.Finch, M.E.Gooden, W.Tornow Partial cross section of neutron-induced reactions on 136Xe at En= 5 MeV for oνββ background studies NUCLEAR REACTIONS 136Xe(n, n'), E=5 MeV; measured reaction products, Eγ, Iγ; deduced partial σ, σ(θ).
doi: 10.1088/1361-6471/aaeba4
2018KI17 Phys.Rev. C 98, 055501 (2018) First limit on neutrinoless quadruple β decay of 150Nd to the 0+1 state of 150Gd RADIOACTIVITY 150Nd(4β-); measured Eγ, Iγ, γγ-coin using HPGe detectors for γ detection and plastic scintillators operated in anti-coincidence mode as active veto detectors to search for 0ν4β- decay to the first excited 0+ state in 150Gd at the Kimballton Underground Research Facility (KURF); deduced lower limit for half-life for the 0ν4β- decay mode of 150Nd. No events assigned to this decay mode.
doi: 10.1103/PhysRevC.98.055501
2018KR03 Phys.Rev. C 98, 014608 (2018), Erratum Phys.Rev. C 107, 039906 (2023) Krishichayan, S.W.Finch, C.R.Howell, A.P.Tonchev, W.Tornow Monoenergetic photon-induced fission cross-section ratio measurements for 235U, 238U, and 239Pu from 9.0 to 17.0 MeV NUCLEAR REACTIONS 235,238U, 239Pu(polarized γ, F), E=9.0-17.0 MeV; measured fission fragments, photofission σ(E), cross sections ratios for the target nuclei using dual-fission ionization chamber (DFC), and quasimonoenergetic Compton backscattered photon beam from HIγS facility of TUNL. Comparison with previous experimental values, with evaluated data in ENDF/B-VII.1 library, and with theoretical calculations using TENDL-2009 code.
doi: 10.1103/PhysRevC.98.014608
2018NE03 Phys.Rev. C 97, 044617 (2018) I.Newsome, M.Bhike, Krishichayan, W.Tornow Neutron radiative capture cross section of 63, 65Cu between 0.4 and 7.5 MeV NUCLEAR REACTIONS 63,65Cu(n, γ), E=0.4-7.5 MeV[neutrons from 3H(p, n) and 2H(d, n) reactions]; measured Eγ, Iγ, σ(E) by activation method at Triangle Universities Nuclear Laboratory (TUNL). Comparison with previous experimental values, and ENDF/B-VII.1 and ENDF/B-VIII.b5 evaluations and TALYS-model calculations TENDL-2015. 115In(n, γ), (n, n'), E=0.4-7.5 MeV; used as monitor reaction. 64,66Cu; measured decay half-lives from γ-decay curves, and compared with literature values.
doi: 10.1103/PhysRevC.97.044617
2018TO09 Phys.Rev. C 98, 064305 (2018) W.Tornow, M.Bhike, S.W.Finch, Krishichayan, A.P.Tonchev Measurement of the 115In (γ, γ') 115mIn inelastic scattering cross section in the 1.8 to 3.7 MeV energy range with monoenergetic photon beams NUCLEAR REACTIONS 115In(γ, γ')115mIn, E=1.8-3.7 MeV; measured Eγ, Iγ, σ(E) for the 336-keV isomer in 115In at the High-Intensity Gamma-ray Source (HIγS) of TUNL. Comparison with different TALYS-1.9 evaluations. 115In(γ, n), E=9-25 MeV; calculated σ(E) using TALYS-1.9 code with the default values and with the Gogny D1M HFB+QRPA model for the level density, E1 and M1 strengths.
doi: 10.1103/PhysRevC.98.064305
2018WI07 Phys.Rev. C 98, 034315 (2018) J.Wilhelmy, A.Brown, P.Erbacher, U.Gayer, J.Isaak, Krishichayan, B.Loher, M.Muscher, H.Pai, N.Pietralla, P.Ries, D.Savran, P.Scholz, M.Spieker, W.Tornow, V.Werner, A.Zilges Investigation of J=1 states and their γ-decay behavior in 52Cr NUCLEAR REACTIONS 52Cr(polarized γ, γ'), E=5.5-9.2 MeV; measured Eγ, Iγ of primary and secondary γ rays, energy integrated σ in nuclear resonance fluorescence (NRF) experiments using γ3 array at the HIγS-TUNL facility. 52Cr; deduced levels, J, π, Γ0, γ-branching ratios, B(M1), B(E1), summed M1 strength. Comparison with shell model calculations, and previous experimental results.
doi: 10.1103/PhysRevC.98.034315
2018YA23 Phys.Rev. C 98, 054621 (2018) S.A.Yates, B.Fallin, C.R.Howell, Krishichayan, W.Tornow, S.M.Grimes Measurement of the 80Se (γ, n) reaction with linearly polarized γ rays NUCLEAR REACTIONS 80Se(polarized γ, n), E=15.6, 15.8, 16.0 MeV; measured E(n), I(n), neutron time-of-flight, differential σ(E, θ), total σ, linear polarization using liquid-scintillation detectors for neutron detection at HIGS-TUNL facility; deduced reaction matrix elements; data analyzed using (γ, n) reaction angular correlation formalism. 79Se; deduced nuclear level density, GDR, nuclear level density model that fits the data best. Comparison with statistical model calculations using Hauser-Feshbach formalism, and with previous experimental values. Relevance to time reversed 79Se(n, γ) reaction, and s-process formation of 82Kr.
doi: 10.1103/PhysRevC.98.054621
2017BE10 Phys.Rev.Lett. 118, 212502 (2017) T.Beck, J.Beller, N.Pietralla, M.Bhike, J.Birkhan, V.Derya, U.Gayer, A.Hennig, J.Isaak, B.Loher, V.Yu.Ponomarev, A.Richter, C.Romig, D.Savran, M.Scheck, W.Tornow, V.Werner, A.Zilges, M.Zweidinger E2 decay strength of the M1 scissors mode of 156Gd and its first excited rotational state NUCLEAR REACTIONS 156Gd(γ, γ'), E=3.07 MeV; measured reaction products, Eγ, Iγ; deduced relative intensities for transitions, B(M1), B(E2), multipole mixing ratio of the decay transition from the scissors mode to the 2+1 state in a deformed nucleus.
doi: 10.1103/PhysRevLett.118.212502
2017BH03 Phys.Rev. C 95, 024608 (2017) M.Bhike, W.Tornow, Krishichayan, A.P.Tonchev Exploratory study of fission product yield determination from photofission of 239Pu at 11 MeV with monoenergetic photons NUCLEAR REACTIONS 239Pu(γ, F)91Sr/92Sr/97Zr/99Mo/133I/134I/138Cs/143Ce, E=11 MeV from Compton back-scattering of free electron laser (FEL) photons at TUNL High Intensity Gamma-Ray Source (HIγS); measured off-line Eγ, Iγ, cumulative fission product yields (FPYs). Comparison with experimental yields from neutron-induced fission and photon-induced fission for Eγ(max)=28 MeV.
doi: 10.1103/PhysRevC.95.024608
2017BH06 Phys.Rev. C 95, 054605 (2017) M.Bhike, Krishichayan, W.Tornow Total and isomeric-state cross sections for the 76Ge(n, 2n)75Ge reaction from threshold to 14.8 MeV NUCLEAR REACTIONS 76Ge(n, 2n)75Ge/75mGe, E=10-15 MeV; measured Eγ, Iγ, σ(E) by activation method, half-lives of 75Ge g.s. and isomer using 10-MV FN Tandem accelerator at TUNL. Comparison with previous experimental values, theoretical model calculations using TALYS code, and with evaluated data in TENDL-2014, JENDL-4.0 and ENDF/B-VII.1 libraries.
doi: 10.1103/PhysRevC.95.054605
2017GO11 Phys.Rev. C 96, 024622 (2017) M.E.Gooden, T.A.Bredeweg, B.Champine, D.C.Combs, S.Finch, A.Hayes-Sterbenz, E.Henry, Krishichayan, R.Rundberg, W.Tornow, J.Wilhelmy, C.Yeamans Measurement of the 209Bi(n, 4n)206Bi and 169Tm(n, 3n)167Tm cross sections between 23.5 and 30.5 MeV relevant to reaction-in-flight neutron studies at the National Ignition Facility NUCLEAR REACTIONS 209Bi(n, 4n), 169Tm(n, 3n), E=23.5, 24.9, 25.5, 26.5, 27.5, 28.5, 29.5, 30.5 MeV; measured neutron time-of-flight spectra, σ(E) at the FN tandem accelerator facility of Triangle Universities Nuclear Laboratory (TUNL). Comparison with previous experimental data, evaluated ENDF/B-VII.1, TENDL-2015 and EAF-2010 libraries, and theoretical calculations. Relevance to charged-particle stopping power measurements at the National Ignition Facility.
doi: 10.1103/PhysRevC.96.024622
2017KR02 Nucl.Instrum.Methods Phys.Res. A854, 40 (2017) Krishichayan, M.Bhike, S.W.Finch, C.R.Howell, A.P.Tonchev, W.Tornow Photofission cross-section ratio measurement of 235U/238U using monoenergetic photons in the energy range of 9.0-16.6 MeV NUCLEAR REACTIONS 235,238U(γ, F), E=9.0-16.6 MeV; measured fission fragments, Eγ, Iγ; deduced fission σ ratio. Comparison with experimental and ENDF/B-VII.1 evaluated data.
doi: 10.1016/j.nima.2017.02.043
2017KR09 Phys.Rev. C 96, 044623 (2017) Krishichayan, M.Bhike, W.Tornow, A.P.Tonchev, T.Kawano Accurate 238U (n, 2n) 237U reaction cross-section measurements from 6.5 to 14.8 MeV NUCLEAR REACTIONS 238U(n, 2n)237U, E=6.34, 6.89, 7.40, 7.87, 8.38, 8.89, 9.40, 9.91, 10.41, 10.92, 11.42, 11.93, 12.43, 13.60, 14.10, 14.8 MeV; 197Au(n, 2n)196Au, E=9.91, 10.41, 10.92, 11.42, 11.93, 12.43, 13.60, 14.10, 14.80 MeV; 27Al(n, α)24Na, E=6.34, 6.89, 7.40, 7.87, 8.38, 8.89, 9.40 MeV; measured Eγ, Iγ, σ(E) by activation method at the FN Tandem Accelerator of the Triangle Universities Nuclear Laboratory (TUNL). 237U, 196Au, 24Na; measured half-lives of the decays of the ground states from γ-decay curves, and compared with literature values. Comparison of cross section data with previous measurements, evaluated data in ENDF/B-VIII.b4, JEFF-3.2, JENDL-4.0, BROND-2.2, CENDL-3.1, ROSFOND-2010, Zolotarev and Zhou You-Pu libraries, and with Hauser-Feshbach model based theoretical calculation.
doi: 10.1103/PhysRevC.96.044623
2017SO26 Phys.Rev. C 96, 064619 (2017) J.Soter, M.Bhike, S.W.Finch, Krishichayan, W.Tornow Measurements of the 169Tm(n, 2n) cross section from threshold to 15 MeV NUCLEAR REACTIONS 169Tm(n, 2n), E=8.5-15 MeV; measured Eγ, Iγ, half-lives of 168Tm, σ(E) at TUNL tandem accelerator facility. Comparison with TENDL-2015 output of the TALYS calculation. 197Au(n, 2n), E=8.5-15 MeV; measured Eγ, Iγ, this reaction served as neutron flux monitor. Comparison with previous experimental data, and evaluated data in IRDF-2002, ENDF/B-VII.1, JENDL-4.0, and JEFF-3.2 libraries. Relevance to diagnostic tool for neutron energy distribution produced in inertial confinement deuterium-tritium fusion experiments at the National Ignition Facility (NIF).
doi: 10.1103/PhysRevC.96.064619
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 206Pb: Connecting nuclear structure to stellar nucleosynthesis NUCLEAR REACTIONS 208Pb(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
2016AS01 Nucl.Phys. A946, 171 (2016) K.Asakura, A.Gando, Y.Gando, T.Hachiya, S.Hayashida, H.Ikeda, K.Inoue, K.Ishidoshiro, T.Ishikawa, S.Ishio, M.Koga, S.Matsuda, T.Mitsui, D.Motoki, K.Nakamura, S.Obara, M.Otani, T.Oura, I.Shimizu, Y.Shirahata, J.Shirai, A.Suzuki, H.Tachibana, K.Tamae, K.Ueshima, H.Watanabe, B.D.Xu, H.Yoshida, A.Kozlov, Y.Takemoto, S.Yoshida, K.Fushimi, T.I.Banks, B.E.Berger, B.K.Fujikawa, T.O'Donnell, L.A.Winslow, Y.Efremenko, H.J.Karwowski, D.M.Markoff, W.Tornow, J.A.Detwiler, S.Enomoto, M.P.Decowski Search for double-beta decay of 136Xe to excited states of 136Ba with the KamLAND-Zen experiment
doi: 10.1016/j.nuclphysa.2015.11.011
2016CH04 Phys.Rev. C 93, 014611 (2016) B.Champine, M.E.Gooden, Krishichayan, E.B.Norman, N.D.Scielzo, M.A.Stoyer, K.J.Thomas, A.P.Tonchev, W.Tornow, B.S.Wang Measurement of the 169Tm(n, 3n)167Tm cross section and the associated branching ratios in the decay of 167Tm NUCLEAR REACTIONS 169Tm(n, 3n), 58Ni, 90Zr, 169Tm(n, 2n), 94Zr(n, α), E=17.35, 18.34, 19.33, 20.32, 21.31 MeV, [quasimonoenergetic neutrons from 2H(d, n), E=15.0-19.2 at TUNL tandem Van de Graaff accelerator]; measured neutron spectra, Eγ, Iγ, σ(E) by activation method. Comparison with previous experimental data, compiled data in EXFOR database and evaluated data in ENDF database. Relevance to measurement of yield of reaction-in-flight neutrons at the LLNL National Ignition Facility (NIF). RADIOACTIVITY 167Tm(EC)[from 165Ho(α, 2n), E=29 MeV at LBNL cyclotron facility]; measured Eγ, Iγ, I(x rays), source activity; deduced branching ratios of 207.8-keV and 531.5-keV γ rays. Comparison with previous experimental values and evaluated data.
doi: 10.1103/PhysRevC.93.014611
2016DE05 Phys.Rev. C 93, 034311 (2016) V.Derya, N.Tsoneva, T.Aumann, M.Bhike, J.Endres, M.Gooden, A.Hennig, J.Isaak, H.Lenske, B.Loher, N.Pietralla, D.Savran, W.Tornow, V.Werner, A.Zilges Decay of quadrupole-octupole 1- states in 40Ca and 140Ce NUCLEAR REACTIONS 40Ca, 140Ce(polarized γ, γ'), E=3.6, 5.9 MeV; measured Eγ, Iγ, γγ-coin, polarization asymmetry and analyzing powers using high intensity γ-ray Source (HIγS) facility at (TUNL); deduced levels, J, π, B(E1), B(E2). Comparisons with energy density functional (EDF) and quasiparticle-phonon model (QPM) calculations. B(E1) and B(E2) systematics for N=82 isotones of 138Ba, 140Ce, 142Nd, 144Sm.
doi: 10.1103/PhysRevC.93.034311
2016FI01 Nucl.Instrum.Methods Phys.Res. A806, 70 (2016) Search for the β decay of 96Zr RADIOACTIVITY 96Zr(β-); measured decay products, Eγ, Iγ; deduced T1/2 limit. Comparison with available data.
doi: 10.1016/j.nima.2015.09.098
2016GA30 Phys.Rev.Lett. 117, 082503 (2016) A.Gando, Y.Gando, T.Hachiya, A.Hayashi, S.Hayashida, H.Iked a, K.Inoue, K.Ishidoshiro, Y.Karino, M.Koga, S.Matsuda, T.Mitsui, K.Nakamura, S.Obara, T.Oura, H.Ozaki, I.Shimizu, Y.Shirahata, J.Shirai, A.Suzuki, T.Takai, K.Tamae, Y.Teraoka, K.Ueshima, H.Watanabe, A.Kozlov, Y.Takemoto, S.Yoshida, K.Fushimi, T.I.Banks, B.E.Berger, B.K.Fujikawa, T.O'Donnell, L.A.Winslow, Y.Efremenko, H.J.Karwowski, D.M.Markoff, W.Tornow, J.A.Detwiler, S.Enomoto, M.P.Decowski Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen RADIOACTIVITY 136Xe(2β-); measured decay products, Eγ, Iγ, Eβ, Iβ; deduced neutrinoless decay T1/2 limit. Comparison with available data.
doi: 10.1103/PhysRevLett.117.082503
2016GO02 Nucl.Data Sheets 131, 319 (2016) M.E.Gooden, C.W.Arnold, J.A.Becker, C.Bhatia, M.Bhike, E.M.Bond, T.A.Bredeweg, B.Fallin, M.M.Fowler, C.R.Howell, J.H.Kelley, Krishichayan, R.Macri, G.Rusev, C.Ryan, S.A.Sheets, M.A.Stoyer, A.P.Tonchev, W.Tornow, D.J.Vieira, J.B.Wilhelmy Energy Dependence of Fission Product Yields from 235U, 238U and 239Pu for Incident Neutron Energies Between 0.5 and 14.8 MeV NUCLEAR REACTIONS 235,238U, 239Pu(n, F), E=0.5-14.8 MeV; measured reaction products, Eγ, Iγ; deduced fission yields.
doi: 10.1016/j.nds.2015.12.006
2016LO04 Phys.Lett. B 756, 72 (2016) B.Loher, D.Savran, T.Aumann, J.Beller, M.Bhike, N.Cooper, V.Derya, M.Duchene, J.Endres, A.Hennig, P.Humby, J.Isaak, J.H.Kelley, M.Knorzer, N.Pietralla, V.Yu.Ponomarev, C.Romig, M.Scheck, H.Scheit, J.Silva, A.P.Tonchev, W.Tornow, F.Wamers, H.Weller, V.Werner, A.Zilges The decay pattern of the Pygmy Dipole Resonance of 140Ce NUCLEAR REACTIONS 140Ce(γ, γ'), (γ, γ), E=6.5 MeV; measured reaction products, Eγ, Iγ; deduced elastic scattering σ, average branching ratio to excited states for 140Ce, Pygmy Dipole Resonance (PDR) couple to the ground state as well as to low-lying excited states, PDR mixing. Comparison with nuclear model calculations.
doi: 10.1016/j.physletb.2016.02.042
2016PA04 Phys.Rev. C 93, 014318 (2016) H.Pai, T.Beck, J.Beller, R.Beyer, M.Bhike, V.Derya, U.Gayer, J.Isaak, Krishichayan, J.Kvasil, B.Loher, V.O.Nesterenko, N.Pietralla, G.Martinez-Pinedo, L.Mertes, V.Yu.Ponomarev, P.-G.Reinhard, A.Repko, P.C.Ries, C.Romig, D.Savran, R.Schwengner, W.Tornow, V.Werner, J.Wilhelmy, A.Zilges, M.Zweidinger Magnetic dipole excitations of 50Cr NUCLEAR REACTIONS 50Cr(γ, γ'), (polarized γ, γ'), E<9.7 MeV bremsstrahlung; measured Eγ, Iγ, γ(θ), γ-polarization asymmetry, integrated σ, γ-branching ratios. Experiments performed at Darmstadt S-DALINAC and TUNL High Intensity γ-ray Source (HIγS) facilities. 50Cr; deduced levels, J, π, B(M1), reduced widths, configurations, M1 spin-flip transition. Discussed isovector rotation-like oscillations of 1+ states versus scissors-type mode. Comparison with Skyrme quasiparticle random-phase-approximation (QRPA) and the large-scale shell model (LSSM) calculations.
doi: 10.1103/PhysRevC.93.014318
2016TO01 Phys.Rev. C 93, 014614 (2016) W.Tornow, M.Bhike, B.Fallin, Krishichayan Fast-neutron-induced potential background near the Q value of neutrinoless double-β decay of 76Ge RADIOACTIVITY 76Ga(β-)[from 76Ge(n, p), E=6.2-21 MeV]; measured Eγ, Iγ, cross section with a focus on the intensity of the 2040.7-keV γ ray, relevant to the measurements of 76Ge 0νββ decay by GERDA Collaboration. Also discussed experimental results of 76Ge(n, n'γ) reaction by the Kentucky group.
doi: 10.1103/PhysRevC.93.014614
2015BE02 Phys.Lett. B 741, 128 (2015) J.Beller, C.Stumpf, M.Scheck, N.Pietralla, D.Deleanu, D.M.Filipescu, T.Glodariu, W.Haxton, A.Idini, J.H.Kelley, E.Kwan, G.Martinez-Pinedo, R.Raut, C.Romig, R.Roth, G.Rusev, D.Savran, A.P.Tonchev, W.Tornow, J.Wagner, H.R.Weller, N.-V.Zamfir, M.Zweidinger Separation of the 1+/1- parity doublet in 20Ne NUCLEAR REACTIONS 20Ne, 28Si(polarized γ, γ'), E=11.26 MeV; measured reaction products, Eγ, Iγ; deduced the energy difference of the parity doublet, the ratio of their integrated σ. Comparison with shell model calculations.
doi: 10.1016/j.physletb.2014.12.018
2015BH02 Phys.Lett. B 741, 150 (2015) M.Bhike, B.Fallin, Krishichayan, W.Tornow Measurement of the neutron-capture cross section of 76Ge and 74Ge below 15 MeV and its relevance to 0νββ decay searches of 76Ge NUCLEAR REACTIONS 74,76Ge(n, γ), E=0.4-14.8 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with ENDF/B-VII.1 and CENDL-3.1 evaluated libraries, TALYS nuclear model code calculations.
doi: 10.1016/j.physletb.2014.12.004
2015BH03 Phys.Rev. C 91, 011601 (2015) M.Bhike, B.Fallin, M.E.Gooden, N.Ludin, W.Tornow Comprehensive sets of 124Xe(n, γ)125Xe and 124Xe(n, 2n)123Xe cross-section data for assessment of inertial-confinement deuterium-tritium fusion plasma NUCLEAR REACTIONS 124Xe(n, γ), E=0.37-7.25 MeV; 124Xe(n, 2n), E=11.36-14.80 MeV; measured Eγ, Iγ, σ(E) by activation method at TUNL facility. Comparison with ENDF-B/VII.1 and JENDL-4.0 evaluated libraries, and with TENDL-2012 and TENDL-2013 model calculation. Relevance to interpreting measured 125Xe/123Xe intensity ratio at NIF-LLNL in laser shots on 124Xe loaded DT capsules.
doi: 10.1103/PhysRevC.91.011601
2015BH09 Phys.Rev. C 91, 064604 (2015) C.Bhatia, B.F.Fallin, M.E.Gooden, C.R.Howell, J.H.Kelley, W.Tornow, C.W.Arnold, E.Bond, T.A.Bredeweg, M.M.Fowler, W.Moody, R.S.Rundberg, G.Y.Rusev, D.J.Vieira, J.B.Wilhelmy, J.A.Becker, R.Macri, C.Ryan, S.A.Sheets, M.A.Stoyer, A.P.Tonchev Exploratory study of fission product yields of neutron-induced fission of 235U, 238U, and 239Pu at 8.9 MeV NUCLEAR REACTIONS 235,238U, 239Pu(n, F), E=8.9 MeV; measured Eγ, Iγ of fission products of 92Sr, 97Zr, 99Mo, 105Ru, 132Te, 133I, 140Ba, 143Ce, 147Nd at TUNL facility; deduced absolute fission product yields by γ activation method. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.91.064604
2015BH10 Phys.Rev. C 92, 014624 (2015) M.Bhike, E.Rubino, M.E.Gooden, Krishichayan, W.Tornow Measurements of the 86Kr (n, γ)87Kr and 86Kr (n , 2n)85Krm reaction cross sections below En = 15 MeV NUCLEAR REACTIONS 86Kr(n, γ), E=0.37-14.8 MeV; 86Kr(n, 2n)85mKr, E=10.9 and 14.8 MeV; measured Eγ, Iγ, σ(E) by activation method. Comparison with ENDF/B-VII.1, JENDL-4.0 and EAF-2010 evaluations, and model calculation TENDL-2012 of the TALYS code. Relevance to studies deuterium-tritium plasma density created in inertial confinement fusion reactions at NIF-LLNL facility.
doi: 10.1103/PhysRevC.92.014624
2015FI06 Phys.Rev. C 92, 045501 (2015) Search for two-neutrino double-β decay of 96Zr to excited states of 96Mo RADIOACTIVITY 96Zr(2β-); measured Eγ, Iγ, γγ-coin at Kimballton Underground Research Facility (KURF); deduced partial half-lives for 2νββ decay to different stated in 96Mo, nuclear matrix element for decay to first excited 0+ state. Comparison with previous measurements, and with double β decays of 100Mo and 150Nd.
doi: 10.1103/PhysRevC.92.045501
2015FI09 Phys.Rev. C 92, 065503 (2015) Search for neutrinoless double-electron capture of 156Dy RADIOACTIVITY 156Dy(2EC); measured Eγ, Iγ using two clover HPGe detectors surrounded by a NaI annulus at the Kimballton Underground Research Facility (KURF). Enriched 156Dy sample; analyzed γ and γγ-coin spectra; deduced no counts above background, set upper limits of partial half-lives for population of different states in 156Dy in 0νϵϵ decay mode.
doi: 10.1103/PhysRevC.92.065503
2015KR04 Phys.Rev. C 91, 044328 (2015) Krishichayan, M.Bhike, W.Tornow, G.Rusev, A.P.Tonchev, N.Tsoneva, H.Lenske Polarized photon scattering off 52Cr Determining the parity of J=1 states NUCLEAR REACTIONS 52Cr(polarized γ, γ'), E=5.21, 5.56, 6.40, 6.50, 7.00, 7.08, 7.19, 7.40, 7.51, 7.74, 7.89, 8.02, 8.11, 8.20, 8.75, 8.95, 9.15, 9.25, 9.36, 9.45 MeV; measured Eγ, Iγ, linear polarization using High Intensity γ-Ray Source (HIγS) facility of TUNL. 52Cr; deduced levels, J, π, B(M1), B(E1), E1 and M1 strength functions, spin-flip M1 resonance structure around 9.1 MeV, fragmentation pattern of the dipole strength below and around the neutron emission threshold, new mode of excitation related to pygmy dipole resonance (PDR). Comparison with calculations using three-phonon quasiparticle phonon model (QPM) with self-consistent energy-density functional theory.
doi: 10.1103/PhysRevC.91.044328
2015WE07 J.Phys.(London) G42, 085106 (2015) G.J.Weisel, W.Tornow, J.H.Esterline Neutron-deuteron analyzing power data at En = 21 MeV and the energy dependence of the three-nucleon analyzing power puzzle NUCLEAR REACTIONS 2H(polarized n, n), E<30 meV; measured reaction products, En, In; deduced n-d analyzing power. Comparison with Faddeev calculations.
doi: 10.1088/0954-3899/42/8/085106
2014BE09 Acta Phys.Pol. B45, 193 (2014) N.Benouaret, J.Beller, J.Isaak, J.H.Kelley, H.Pai, N.Pietralla, V.Yu.Ponomarev, R.Raut, C.Romig, G.Rusev, D.Savran, M.Scheck, L.Schnorrenberger, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, M.Zweidinger Photoexcitation of the Stable Tl Isotopes Below the Neutron Separation Energy NUCLEAR REACTIONS 203,205Tl(γ, γ'), E<7.5 MeV; measured reaction products, Eγ, Iγ; deduced dipole strength distribution. Comparison with available data.
doi: 10.5506/APhysPolB.45.193
2014BH04 Phys.Rev. C 89, 031602 (2014) Neutron-capture cross-section measurements of 136Xe between 0.4 and 14.8 MeV NUCLEAR REACTIONS 136Xe(n, γ), E=0.4-14.8 MeV; measured Eγ, Iγ, σ(E) at TUNL facility, activation method. Comparisons with predictions from ENDF/B-VII.1 and TENDL-2012 libraries. Relevance to neutrinoless double-β decay searches. RADIOACTIVITY 137Xe(β-); measured Eγ, half-life.
doi: 10.1103/PhysRevC.89.031602
2014BH09 Phys.Lett. B 736, 361 (2014) Measurements of the 40Ar(n, γ)41Ar radiative-capture cross section between 0.4 and 14.8 MeV NUCLEAR REACTIONS 40Ar(n, γ), E=0.4-14.8 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with ENDF/B-VII.1, TENDL-2013 libraries. RADIOACTIVITY 41Ar(β-); measured decay products, Eγ, Iγ; deduced T1/2. Comparison with available data.
doi: 10.1016/j.physletb.2014.07.044
2014BH10 Nucl.Data Sheets 119, 176 (2014) C.Bhatia, M.E.Gooden, W.Tornow, A.P.Tonchev Measurements of the (n, 2n) Reaction Cross Section of 181Ta from 8 to 15 MeV NUCLEAR REACTIONS 181Ta(n, 2n), E=8-15 MeV; measured activation Eγ, Iγ; deduced γ transitions, σ. Compared with other data, ENDF/B-VII.1, TUNL-2012 and TENDL-2011.
doi: 10.1016/j.nds.2014.08.049
2014BH11 Nucl.Data Sheets 119, 324 (2014) C.Bhatia, B.Fallin, C.Howell, W.Tornow, M.Gooden, J.Kelley, C.Arnold, E.Bond, T.Bredeweg, M.Fowler, W.Moody, R.Rundberg, G.Rusev, D.Vieira, J.Wilhelmy, J.Becker, R.Macri, C.Ryan, S.Sheets, M.Stoyer, A.Tonchev Fission Product Yield Study of 235U, 238U and 239Pu Using Dual-Fission Ionization Chambers NUCLEAR REACTIONS 235,238U, 239Pu(n, F), E=4.6, 9.0, 14.5 MeV; measured Eγ, Iγ(t) from fission fragments using dual fission chamber; deduced fission products yield ratio. Compared with other data and libraries.
doi: 10.1016/j.nds.2014.08.089
2014DE04 Phys.Lett. B 730, 288 (2014) V.Derya, D.Savran, J.Endres, M.N.Harakeh, H.Hergert, J.H.Kelley, P.Papakonstantinou, N.Pietralla, V.Yu.Ponomarev, R.Roth, G.Rusev, A.P.Tonchev, W.Tornow, H.J.Wortche, A.Zilges Isospin properties of electric dipole excitations in 48Ca NUCLEAR REACTIONS 48Ca(polarized γ, γ'), E=6.6-9.51 MeV; 40,48Ca, 16O(α, α'γ), E=136 MeV; measured reaction products, Eγ, Iγ; deduced B(E1), J, π. Comparison with RPA calculations, available data.
doi: 10.1016/j.physletb.2014.01.050
2014DE13 Phys.Rev. C 89, 055802 (2014) R.J.de Boer, A.Best, J.Gorres, K.Smith, W.Tan, M.Wiescher, R.Raut, G.Rusev, A.P.Tonchev, W.Tornow Photoneutron strengths in 26Mg at energies of astrophysical interest NUCLEAR REACTIONS 26Mg(polarized γ, n), [circularly polarized γ beam produced in Compton backscattering of laser photons from E=498-548 MeV electrons], E=10.80-12.05 MeV; measured Eγ, Iγ, E(n), I(n), time-of-flight spectra, photoneutron σ(E) at HIγS facility of TUNL. 26Mg; deduced level energies above S(n), resonance strengths, comparison with 25Mg(n, γ)26Mg by R-matrix analysis. Relevance to astrophysically important 22Ne(α, n)25Mg reaction.
doi: 10.1103/PhysRevC.89.055802
2014GO18 Nucl.Data Sheets 119, 121 (2014) M.E.Gooden, B.A.Fallin, S.W.Finch, J.H.Kelley, C.R.Howell, G.Rusev, A.P.Tonchev, W.Tornow, V.Stanislav Partial Cross Sections of Neutron-Induced Reactions on natCu at En = 6, 8, 10, 12, 14, and 16 MeV for Oνββ Background Studies NUCLEAR REACTIONS 63,65Cu(n, n'γ), E=6, 8, 10, 12, 14, 16 MeV; measured Eγ, Iγ(θ) using HPGe; deduced discrete level gated σ using γ ray angular distribution from Dicebox code; calculated discrete level gated σ using TALYS. Compared with ENDF/B-VII.1 and LANL data. Preliminary.
doi: 10.1016/j.nds.2014.08.034
2014KI13 Phys.Rev. C 90, 055501 (2014) M.F.Kidd, J.H.Esterline, S.W.Finch, W.Tornow Two-neutrino double-β decay of 150Nd to excited final states in 150Sm RADIOACTIVITY 150Nd(2β-); measured Eγ, Iγ, γγ-coin, half-lives using two HPGe detectors at TUNL Low Background Counting Facility (LBCF), and at Kimballton Underground Research Facility (KURF); deduced half-life for 2νββ decay to the ground state of 150Sm, and lower limits of half-lives for 2νββ decay to the second and third 2+ states and second excited 0+ states in 150Sm. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.90.055501
2014MA05 Phys.Rev.Lett. 112, 072501 (2014) R.Massarczyk, R.Schwengner, F.Donau, S.Frauendorf, M.Anders, D.Bemmerer, R.Beyer, C.Bhatia, E.Birgersson, M.Butterling, Z.Elekes, A.Ferrari, M.E.Gooden, R.Hannaske, A.R.Junghans, M.Kempe, J.H.Kelley, T.Kogler, A.Matic, M.L.Menzel, S.Muller, T.P.Reinhardt, M.Roder, G.Rusev, K.D.Schilling, K.Schmidt, G.Schramm, A.P.Tonchev, W.Tornow, A.Wagner Nuclear Deformation and Neutron Excess as Competing Effects for Dipole Strength in the Pygmy Region NUCLEAR REACTIONS 124,128,132,134Xe(γ, X), E<12 MeV; measured reaction products, Eγ, Iγ. 124,128,132,134Xe; deduced photoabsorption σ, summed B(E1) strength, nuclear deformation in the region of the pygmy dipole resonance. Nuclear resonance fluorescence experiment, random-phase approximation calculations, comparison with available data.
doi: 10.1103/PhysRevLett.112.072501
2014MA90 Phys.Rev. C 90, 054310 (2014) R.Massarczyk, G.Rusev, R.Schwengner, F.Donau, C.Bhatia, M.E.Gooden, J.H.Kelley, A.P.Tonchev, W.Tornow Magnetic dipole strength in 128Xe and 134Xe in the spin-flip resonance region NUCLEAR REACTIONS 128,134Xe(polarized γ, γ'), E=6.0-9.6 MeV; measured Eγ, Iγ, γ(pol, θ) using HIγS facility at TUNL. 128,134Xe; deduced branching ratios and comparison with γ-ray cascade simulations, photoabsorption σ(E) for M1 and E1 transitions, B(M1), B(E1). Comparison of σ(E) with previous experimental results, predictions of phenomenological expressions, RIPL3 recommendations, triple-Lorentzian (TLO) model for E1 and the triple-Gaussian for M1, and QRPA calculations.
doi: 10.1103/PhysRevC.90.054310
2014SA20 Phys.Rev. C 89, 035803 (2014) A.Sauerwein, K.Sonnabend, M.Fritzsche, J.Glorius, E.Kwan, N.Pietralla, C.Romig, G.Rusev, D.Savran, L.Schnorrenberger, A.P.Tonchev, W.Tornow, H.R.Weller Determination of the 142Ce(γ, n) cross section using quasi-monoenergetic Compton backscattered γ rays NUCLEAR REACTIONS 142Ce(polarized γ, n), E=7.6=9.7 MeV; measured Eγ, Iγ, σ(E) at HIγS-TUNL facility. Activation method. Comparison with Hauser-Feshbach calculations using different γ-ray strength functions, and with predictions of Hartree-Fock-BCS model. Relevance to s-process branching at 141Ce, and elemental abundance.
doi: 10.1103/PhysRevC.89.035803
2014TO11 Few-Body Systems 55, 581 (2014) Recent Experiments Involving Few-Nucleon Systems
doi: 10.1007/s00601-014-0836-0
2014WE04 Phys.Rev. C 89, 054001 (2014) G.J.Weisel, W.Tornow, A.S.Crowell, J.H.Esterline, G.M.Hale, C.R.Howell, P.D.O'Malley, J.R.Tompkins, H.Witala Neutron-deuteron analyzing power data at En = 22.5 MeV NUCLEAR REACTIONS 2H(polarized n, n), [polarized neutrons from 2H(polarized d, n) reaction], E=22.5 MeV; measured E(n), I(n), n-d analyzing power Ay(θ) using ABPIS facility at TUNL. Monte-Carlo simulations. Comparison with Faddeev calculations using several different NN potentials. Discussed three-nucleon analyzing power puzzle.
doi: 10.1103/PhysRevC.89.054001
2013BH01 Phys.Rev. C 87, 011601 (2013) C.Bhatia, S.W.Finch, M.E.Gooden, W.Tornow 136Xe(n, 2n)135Xe cross section between 9 and 15 MeV NUCLEAR REACTIONS 136Xe(n, 2n), E=9.0-14.9 MeV; measured Eγ, Iγ, σ(E) for production of g.s. and isomer of 135Xe by activation method. 135Xe; deduced half-lives of g.s. and isomer, and compared with literature values. Comparison of σ(E) with previous studies, and with evaluations. Relevance to background contributions in search for neutrinoless double-β decay of 136Xe.
doi: 10.1103/PhysRevC.87.011601
2013BH03 Phys.Rev. C 87, 031601 (2013) C.Bhatia, M.E.Gooden, W.Tornow, A.P.Tonchev Ground-state and isomeric-state cross sections for 181Ta(n, 2n)180Ta between 8 and 15 MeV NUCLEAR REACTIONS 181Ta(n, 2n)180Ta, E=8-15 MeV; measured Eγ, Iγ, σ(E) at TUNL facility. Comparison with previous experimental results, and with evaluated libraries ENSDF VII.1 and TENDL 2011.
doi: 10.1103/PhysRevC.87.031601
2013ES01 Phys.Rev.Lett. 110, 152503 (2013) J.Esterline, W.Tornow, A.Deltuva, A.C.Fonseca Analyzing Power Ay(θ) of n(pol)-3He Elastic Scattering between 1.60 and 5.54 MeV NUCLEAR REACTIONS 3He(polarized n, n), E=1.6-5.54 MeV; measured reaction products, En, In; deduced analyzing power, scattering parameters, θ(θ). Comparison with available data.
doi: 10.1103/PhysRevLett.110.152503
2013GO19 Phys.Rev. C 88, 064308 (2013) P.M.Goddard, N.Cooper, V.Werner, G.Rusev, P.D.Stevenson, A.Rios, C.Bernards, A.Chakraborty, B.P.Crider, J.Glorius, R.S.Ilieva, J.H.Kelley, E.Kwan, E.E.Peters, N.Pietralla, R.Raut, C.Romig, D.Savran, L.Schnorrenberger, M.K.Smith, K.Sonnabend, A.P.Tonchev, W.Tornow, S.W.Yates Dipole response of 76Se above 4 MeV NUCLEAR REACTIONS 76Se(polarized γ, γ'), E=4-9 MeV; measured Eγ, Iγ, γ(θ), integrated σ, γ(linear polarization) at HIγS facility at TUNL. 76Se; deduced levels, J, π, Γ, level half-lives, B(E1), B(M1), branching ratios. Comparison with theoretical calculations.
doi: 10.1103/PhysRevC.88.064308
2013IS14 Phys.Lett. B 727, 361 (2013) J.Isaak, D.Savran, M.Krticka, M.W.Ahmed, J.Beller, E.Fiori, J.Glorius, J.H.Kelley, B.Loher, N.Pietralla, C.Romig, G.Rusev, M.Scheck, L.Schnorrenberger, J.Silva, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, M.Zweidinger Constraining nuclear photon strength functions by the decay properties of photo-excited states NUCLEAR REACTIONS 11B, 130Te(γ, γ'), (γ, X), E<10 MeV; measured reaction products, Eγ, Iγ; deduced excited states π quantum numbers within 5.5-8.5 MeV region, γ-ray branching ratio, population intensity. Comparison with DICEBOX simulations, DHIPS and HIγS facilities at Darmstadt and TUNL, respectively.
doi: 10.1016/j.physletb.2013.10.040
2013LO05 Nucl.Instrum.Methods Phys.Res. A723, 136 (2013) B.Loher, V.Derya, T.Aumann, J.Beller, N.Cooper, M.Duchene, J.Endres, E.Fiori, J.Isaak, J.Kelley, M.Knorzer, N.Pietralla, C.Romig, D.Savran, M.Scheck, H.Scheit, J.Silva, A.Tonchev, W.Tornow, H.Weller, V.Werner, A.Zilges The high-efficiency γ-ray spectroscopy setup γ3 at HIγS NUCLEAR REACTIONS 32S(γ, γ'), E=8.125 MeV; measured reaction products, Eγ, Iγ; deduced precise value for the branching ratio for 1+ to 2+ transition.
doi: 10.1016/j.nima.2013.04.087
2013MA39 Phys.Rev. C 87, 054613 (2013) S.MacMullin, M.Kidd, R.Henning, W.Tornow, C.R.Howell, M.Brown Measurement of the elastic scattering cross section of neutrons from argon and neon NUCLEAR REACTIONS 20Ne(n, n), E=5.0, 8.0 MeV; 40Ar(n, n), E=6.0 MeV; measured neutron and γ-ray spectra, TOF, σ, differential σ(θ) using liquid scintillator detectors at TUNL facility. Spherical optical model (SOM) analysis of experimental data using the GENOA computer code. Comparison with Koning and Delaroche local optical-model parameters, and with ENDF/B-VII.0 parameters. Relevance to neutron background contributions in direct dark matter searches. Accurate data for benchmarking global optical models. Improved cross-section libraries for the GEANT4 simulation code.
doi: 10.1103/PhysRevC.87.054613
2013RA23 Phys.Rev.Lett. 111, 112501 (2013) R.Raut, A.P.Tonchev, G.Rusev, W.Tornow, C.Iliadis, M.Lugaro, J.Buntain, S.Goriely, J.H.Kelley, R.Schwengner, A.Banu, N.Tsoneva Cross-Section Measurements of the 86Kr(γ, n) Reaction to Probe the s-Process Branching at 85Kr NUCLEAR REACTIONS 86Kr, 197Au(γ, n), E<9.86-13 MeV; measured reaction products, Eγ, Iγ; deduced σ for direct and inverse reactions, 82,86Kr isotopic ratios. Comparison with HFB+QRPA calculations, TALYS code.
doi: 10.1103/PhysRevLett.111.112501
2013RO28 Phys.Rev. C 88, 044331 (2013) C.Romig, J.Beller, J.Glorius, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, V.Yu.Ponomarev, A.Sauerwein, D.Savran, M.Scheck, L.Schnorrenberger, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, A.Zilges, M.Zweidinger Low-lying dipole strength of the open-shell nucleus 94Mo NUCLEAR REACTIONS 94Mo(γ, γ'), (polarized γ, γ'), E=5.47, 6.05, 6.44, 6.61, 6.89, 7.65, 8.70 MeV; measured Eγ, Iγ, γγ(θ), γ-polarization asymmetry using DHIPS setup at S-DALINAC, and HiγS at TUNL and DFELL facilities. 94Mo; deduced levels, J, π, Γ20/Γ, branching ratios, B(E1), B(M1), E1 strength distributions, feeding of first 2+ level, elastic σ. Comparison with QPM calculations, and statistical model using DICEBOX computer code.
doi: 10.1103/PhysRevC.88.044331
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 90Zr NUCLEAR REACTIONS 90Zr(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
2013SC03 Phys.Rev. C 87, 024306 (2013) R.Schwengner, R.Massarczyk, G.Rusev, N.Tsoneva, D.Bemmerer, R.Beyer, R.Hannaske, A.R.Junghans, J.H.Kelley, E.Kwan, H.Lenske, M.Marta, R.Raut, K.D.Schilling, A.Tonchev, W.Tornow, A.Wagner Pygmy dipole strength in 86Kr and systematics of N=50 isotones NUCLEAR REACTIONS 86Kr(γ, γ'), (polarized γ, γ'), E<11.2 MeV; measured Eγ, Iγ, γγ(θ), widths, azimuthal asymmetry, integrated σ. ELBE accelerator facility at HZDR, and HIγS facility at TUNL. 86Kr; deduced levels, PDR, J, π, branching ratios, photoabsorption σ(E), energy-weighted sums of photoabsorption σ. Comparison of photoabsorption σ with that from (γ, n) reaction. NUCLEAR STRUCTURE 86Kr, 88Sr, 90Zr, 92Mo; calculated neutron skin thickness, B(E1), proton and neutron transition densities using QRPA calculations. Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.87.024306
2013SC08 Phys.Rev. C 87, 051304 (2013) M.Scheck, V.Yu.Ponomarev, T.Aumann, J.Beller, M.Fritzsche, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, R.Raut, C.Romig, G.Rusev, D.Savran, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, M.Zweidinger Decay pattern of the pygmy dipole resonance in 60Ni NUCLEAR REACTIONS 60Ni(polarized γ, γ'), E=7.65-9.66 MeV; measured Eγ, Iγ, M1 and E1 strengths at HIγS-TUNL facility. 60Ni; deduced levels, J, π, PDR, branching ratios, number of 1+ and 1- states. Comparison with quasiparticle phonon model (QPM) calculations.
doi: 10.1103/PhysRevC.87.051304
2013SC20 Phys.Rev. C 88, 044304 (2013) M.Scheck, V.Yu.Ponomarev, M.Fritzsche, J.Joubert, T.Aumann, J.Beller, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, R.Raut, C.Romig, G.Rusev, D.Savran, L.Schorrenberger, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, A.Zilges, M.Zweidinger Photoresponse of 60Ni below 10-MeV excitation energy: Evolution of dipole resonances in fp-shell nuclei near N=Z NUCLEAR REACTIONS 60Ni(γ, γ'), (polarized γ, γ'), E<10 MeV; 58Ni(polarized γ, γ'), E<10 MeV; measured Eγ, Iγ, γγ(θ), γ-ray polarization, integrated σ, γ-branching ratios using High-intensity photon setup at S-DALINAC facility. 58,60Ni; deduced levels, J, π, width, level half-lives, B(E1), B(M1), B(E2), E1 and M1 strength distributions. Thomas-Reiche-Kuhn sum rule. Pygmy-dipole resonances. Comparison with QPM calculations.
doi: 10.1103/PhysRevC.88.044304
2012AL15 Phys.Rev. C 86, 034603 (2012) M.A.Al-Ohali, J.P.Delaroche, C.R.Howell, M.M.Nagadi, A.A.Naqvi, W.Tornow, R.L.Walter, G.J.Weisel Neutron scattering from 28Si and 32S from 8.0 to 18.9 MeV, dispersive optical model analyses, and ground-state correlations NUCLEAR REACTIONS 28Si(n, n), E=15.4, 18.9 MeV; 32S(n, n), E=8.0, 9.9, 11.9, 13.9, 15.4, 16.9, 18.9 MeV; measured E(n), I(n), TOF, σ(E, θ), total σ(E), Ay(θ); deduced optical model potentials parameters by nucleon-nucleus dispersive optical model (DOM) analysis in the continuum and bound-state regions. 28Si(n, n), E=2.45-65.0; 32S(n, n), E=3.0-40.0 MeV; analyzed σ(E, θ) and Ay(θ) data from previous experiments by DOM. 28Si, 32S(n, n), E=2-160 MeV; analyzed total σ(E) by DOM. 28Si, 32S; deduced neutron and proton binding energies, occupation probabilities, root-mean-square radii, spectroscopic factors, and compared with variational multiparticle multihole configuration mixing (mp-mh CM) shell-model calculation using the Gogny D1S effective force.
doi: 10.1103/PhysRevC.86.034603
2012BE39 J.Phys.:Conf.Ser. 366, 012003 (2012) J.Beller, J.Wagner, M.Ahmed, D.Deleanu, D.M.Filipescu, T.Glodariu, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, R.Raut, C.Romig, G.Rusev, M.Scheck, S.C.Stave, A.Tonchev, W.Tornow, H.R.Weller, N.-V.Zamfir, M.Zweidinger Energy separation of the 1+/1- parity doublet in 20Ne NUCLEAR REACTIONS 28Si, 20Ne(polarized γ, γ'), E=11.26 MeV; measured reaction products, Eγ, Iγ. 20Ne; deduced integrated σ, energy separation, J, π of parity doublet states, effective nuclear enhancement factor.
doi: 10.1088/1742-6596/366/1/012003
2012BH09 Phys.Rev. C 86, 041602 (2012) C.Bhatia, S.W.Finch, M.E.Gooden, W.Tornow 40Ar(n, p)40Cl reaction cross section between 9 and 15 MeV NUCLEAR REACTIONS 40Ar(n, p)40Cl, E=9-15 MeV; measured Eγ, Iγ, σ(E), activation method. Comparison with previous experimental data, evaluations and theoretical predictions. Relevance to background contributions in experiments for 0νββ decay mode, dark matter, and neutrino detection.
doi: 10.1103/PhysRevC.86.041602
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 238U to polarized photons below the neutron separation energy NUCLEAR REACTIONS 238U(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. 238U; 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 232Th, 236,238U. Comparison with QRPA calculations.
doi: 10.1103/PhysRevC.85.044302
2012MA31 Phys.Rev. C 86, 014319 (2012) R.Massarczyk, R.Schwengner, F.Donau, E.Litvinova, G.Rusev, R.Beyer, R.Hannaske, A.R.Junghans, M.Kempe, J.H.Kelley, T.Kogler, K.Kosev, E.Kwan, M.Marta, A.Matic, C.Nair, R.Raut, K.D.Schilling, G.Schramm, D.Stach, A.P.Tonchev, W.Tornow, E.Trompler, A.Wagner, D.Yakorev Electromagnetic dipole strength of 136Ba below the neutron separation energy NUCLEAR REACTIONS 136Ba(γ, γ'), E at 7.0 MeV/c and 11.4 MeV/c; 136Ba(polarized γ, γ')E=4.7, 5.1, 5.6, 6.1, 6.5, 7.0, 7.5, 8.0, 8.4, 8.7, 9.0, 9.3 MeV; measured Eγ, Iγ, integrated σ(E), photoabsorption σ as a function of excitation energy, γ(θ), γ(lin pol) using Bremsstrahlung facility at ELBE, HZDR, and HIγS facility at TUNL. 136Ba; deduced levels, J, π, widths, pygmy dipole resonances, dipole strength in the quasicontinuum, enhancement of dipole strength. Statistical code used to simulate inelastic transitions and to determine the branching ratios of transitions to ground state. GEANT4 simulations. Comparison with previous experimental studies, and with theoretical calculations using quasiparticle random-phase approximation (QRPA) and relativistic quasiparticle time blocking approximation (RQTBA) approaches. Comparison of photoabsorption σ in 136,138Ba and 139La targets.
doi: 10.1103/PhysRevC.86.014319
2012RA05 Phys.Rev.Lett. 108, 042502 (2012) R.Raut, W.Tornow, M.W.Ahmed, A.S.Crowell, J.H.Kelley, G.Rusev, S.C.Stave, A.P.Tonchev Photodisintegration Cross Section of the Reaction 4He(γ, p)3H between 22 and 30 MeV NUCLEAR REACTIONS 4He(γ, p), E=22-30 MeV; measured reaction products; deduced σ and its uncertainties. Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.108.042502
2012RA21 J.Phys.:Conf.Ser. 337, 012048 (2012) R.Raut, A.Banu, C.Iliadis, J.H.Kelley, G.Rusev, R.Schwengner, A.P.Tonchev, W.Tornow Cross-Section Measurements of the 86Kr(γ, n) Reaction to Probe the s-Process Branching at 85Kr NUCLEAR REACTIONS 86Kr(γ, n), E=9.970, 10.115, 10.170, 10.290, 10.360, 10.490, 11.005 MeV; measured En, In using 3He proportional counters; deduced σ; calculated σ using TALYS code with different parameter sets.
doi: 10.1088/1742-6596/337/1/012048
2012ST15 Nucl.Phys. A895, 33 (2012) S.L.Stephenson, B.E.Crawford, W.I.Furman, E.V.Lychagin, A.Yu.Muzichka, G.V.Nekhaev, E.I.Sharapov, V.N.Shvetsov, A.V.Strelkov, B.G.Levakov, A.E.Lyzhin, Yu.I.Chernukhin, C.R.Howell, G.E.Mitchell, W.Tornow, R.A.Showalter-Bucher Experiment on direct nn scattering - The radiation-induced outgassing complication NUCLEAR REACTIONS 1n(n, n), E=thermal[thermalized from YAGUAR pulsed reactor]; measured En, In using 3He thick and thin ionization detector and n4He ToF; analyzed feasibility to deduce σnn, neutron-neutron scattering length, neutron-neutron interaction, electron energy deposition in walls and radiation-induced desorption.
doi: 10.1016/j.nuclphysa.2012.09.005
2012TO08 Phys.Rev. C 85, 061001 (2012) W.Tornow, J.H.Kelley, R.Raut, G.Rusev, A.P.Tonchev, M.W.Ahmed, A.S.Crowell, S.C.Stave Photodisintegration cross section of the reaction 4He(γ, n)3He at the giant dipole resonance peak NUCLEAR REACTIONS 4He(γ, n)3He, E=27.0, 27.5, 28.0 MeV; measured Eγ, Iγ, angle-integrated σ at GDR peak. Duke University electron storage ring facility. Comparison with previous experimental data, and with theoretical predictions by Trento group based on semirealistic central nucleon-nucleon (NN) potential of the MT I-III type.
doi: 10.1103/PhysRevC.85.061001
2011IS01 Phys.Rev. C 83, 034304 (2011) J.Isaak, D.Savran, M.Fritzsche, D.Galaviz, T.Hartmann, S.Kamerdzhiev, J.H.Kelley, E.Kwan, N.Pietralla, C.Romig, G.Rusev, K.Sonnabend, A.P.Tonchev, W.Tornow, A.Zilges Investigation of low-lying electric dipole strength in the semimagic nucleus 44Ca NUCLEAR REACTIONS 44Ca(polarized γ, γ'), E = 6-10, 9.9 MeV; measured Eγ, Iγ, γ(θ), integrated cross sections, and polarization asymmetry at DHIPS facility using S-DALINAC accelerator, and at HIγS facility. 44Ca; deduced levels, J, π, photon branching ratios, widths, B(E1) and B(M1) transition strengths. Comparisons with dipole strengths in 40,48Ca and with microscopic calculations within the extended theory of finite Fermi systems. Dependence of total E1 strength on neutron number.
doi: 10.1103/PhysRevC.83.034304
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 235U below 3 MeV from nuclear resonance fluorescence NUCLEAR REACTIONS 235U(γ, γ'), E=1.6-3.0 MeV; measured Eγ, Iγ, γγ-coin, integrated cross sections, and widths using HIγS facility. 235U; deduced levels, J, π, branching ratios. Comparison with quasiparticle random-phase approximation in deformed basis for dipole transitions.
doi: 10.1103/PhysRevC.83.041601
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