NSR Query Results
Output year order : Descending NSR database version of April 24, 2024. Search: Author = J.L.Ullmann Found 117 matches. Showing 1 to 100. [Next]2023KE09 Phys.Rev. C 108, 024603 (2023) K.J.Kelly, M.Devlin, J.M.O'Donnell, D.Neudecker, A.E.Lovell, R.C.Haight, C.Y.Wu, R.Henderson, E.A.Bennett, T.Kawano, J.L.Ullmann, N.Fotiades, J.Henderson, S.M.Mosby, T.N.Taddeucci, P.Talou, M.C.White, J.A.Gomez, H.Y.Lee Measurement of the 238U(n, f) prompt fission neutron spectrum from 10 keV to 10 MeV induced by neutrons with 1.5-20 MeV energy NUCLEAR REACTIONS 238U(n, F), E=1.5-20 MeV; measured fission fragments, En, In, neutron time-of-flight, (fragment)n-coin; deduced prompt fission neutron spectrum (PFNS). Systematic trends in PFNS and PFNS ratios for 239Pu, 235U, and 238U obtained in series of Chi-Nu experiments. Comparison to other experimental results, CGMF calculations and data from JEFF-3.3, JENDL-5.0. ENDF/B-VIII libraries. Pulsed white neutron source at Weapons Neutron Research (WNR) facility of the Los Alamos Neutron Science Center (LANSCE). Li-glass array consisting of 22 detectors and liquid scintillator array consisting of 54 detector used for neutron detection, while PPAC used for detecting fission fragments in the frame of Chi-Nu experiment.
doi: 10.1103/PhysRevC.108.024603
2023KN03 Phys.Rev. C 107, 044313 (2023) I.Knapova, A.Couture, C.Fry, J.Kvasil, M.Krticka, V.O.Nesterenko, J.M.O'Donnell, C.J.Prokop, G.Rusev, J.L.Ullmann, S.Valenta Photon strength functions, level densities, and isomeric ratio in 168Er from the radiative neutron capture measured at the DANCE facility NUCLEAR REACTIONS 168Er(n, γ), E=15-350 eV; measured neutron Time-of-Flight, Eγ, Iγ, γγ-coin, total γ-sum energy, multistep γ-cascade spectra; deduced γ- multiplicity, isomeric ratios, resonances, total radiative width of s-wave resonances. 168Er; deduced isomer levels, T1/2, nuclear level density (NLD), photon strength functions (PSFs), total B(M1) strength. Comparison to experimental data obtained by Oslo method and in NRF experiments. Confirmed scissor mode resonance-like structure in the M1 PSF with its centroid between 3.1 and 3.3 MeV and a width of about 1 MeV. Analysis of multistep cascade fluctuations indicate possible invalidity of the assumed Porter-Thomas distribution of the primary transition intensities. Comparison to TALYS and DICEBOX simulations. Highly segmented γ-ray calorimeter Detector for Advanced Neutron Capture Experiments DANCE (160 BaF2 scintillation crystals) at at the moderated spallation neutron source LANSCE (Los Alamos Neutron Science Center).
doi: 10.1103/PhysRevC.107.044313
2023LE08 Phys.Rev. C 108, 014608 (2023) E.Leal-Cidoncha, A.Couture, E.M.Bond, T.A.Bredeweg, C.Fry, T.Kawano, A.E.Lovell, G.Rusev, I.Stetcu, J.L.Ullmann, L.Leal, M.T.Pigni Measurement of the neutron-induced capture-to-fission cross section ratio in 233U at LANSCE NUCLEAR REACTIONS 235U(n, F), (n, γ), E=0.007-250 keV; measured Eγ, Iγ, γ-sum, En, In, nγ-coin; deduced capture-to-fission σ ratio, σ(E) of (n, γ) reaction derived from obtained ratio and ENDF/B-VIII.0 fission σ. Comparison to other experimental data, statistical model calculations and data from ENDF/B-VIII.0, JEFF-3.3, and JENDL-5 libraries. Discussed impact of the data on Th-U fuel cycle. Detector for Advanced Neutron Capture Experiments (DANCE) γ-calorimeter composed of 160 BaF2 crystals combined with the neutron detector array at DANCE (NEUANCE) composed of 21 stilbene crystals at Los Alamos Neutron Science Center (LANSCE, LANL).
doi: 10.1103/PhysRevC.108.014608
2022KE01 Phys.Rev. C 105, 044615 (2022) K.J.Kelly, J.A.Gomez, M.Devlin, J.M.O'Donnell, D.Neudecker, A.E.Lovell, R.C.Haight, C.Y.Wu, R.Henderson, T.Kawano, E.A.Bennett, S.M.Mosby, J.L.Ullmann, N.Fotiades, J.Henderson, T.N.Taddeucci, H.Y.Lee, P.Talou, M.C.White Measurement of the 235U(n, f) prompt fission neutron spectrum from 10 keV to 10 MeV induced by neutrons of energy from 1 MeV to 20 MeV NUCLEAR REACTIONS 235U(n, F), E=0.01-10 MeV; measured In, En, neutron time-of-flight, fission fragments, neutrons angular distributions, (fragment)n-coin; deduced prompt fission neutron spectrum (PFNS), components corresponding to first-, second-, and third-chance fission as well as pre-equilibrium neutron emission preceding fission, mean PFNS energy, ratio to PFNMS obtained in 239Pu(n, F) reaction. Experiment performed as a part of Chi-Nu project aimed to measure the PFNS of major actinides with the Weapons Neutron Research (WNR) facility at the Los Alamos Neutron Science Center (LANSCE). The results are compared with other experimental data, CGMF calculations and selected nuclear data evaluations - ENDF/B-VIII.0, JEFF-3.3, JENDL-5.0.
doi: 10.1103/PhysRevC.105.044615
2022KN01 Phys.Rev. C 106, 034607 (2022) I.Knapova, S.Valenta, B.Baramsai, T.A.Bredeweg, A.Couture, C.Fry, M.Jandel, J.Kroll, M.Krticka, G.E.Mitchell, J.M.O'Donnell, C.J.Prokop, G.Rusev, J.L.Ullmann Spin assignment and statistical properties of neutron resonances from 161, 163Dy(n, γ) and 167Er(n, γ) measured at the DANCE facility NUCLEAR REACTIONS 161,163Dy, 167Er(n, γ), E=2-345 eV; measured Eγ, Iγ, γγ-coin, γ-sum energy; deduced J, resonances parameters, average resonance spacings. Checked the ratio of spacings for the two spins formed in s-wave resonance capture against predictions of different nuclear level density models. Comparison to other experimental data, Mughabghab "Atlas of Neutron Resonances" evaluation and TALYS calculations. Highly segmented γ-ray calorimeter Detector for Advanced Neutron Capture Experiments (DANCE) consisting of 160 BaF2 crystals the Los Alamos Neutron Science Center.
doi: 10.1103/PhysRevC.106.034607
2022KO29 Eur.Phys.J. A 58, 195 (2022) P.E.Koehler, J.L.Ullmann, A.J.Couture, S.M.Mosby Constraining the nuclear spin distribution using improved 197Au neutron resonance parameters NUCLEAR REACTIONS 197Au(n, X), E<3 keV; measured reaction products, En, In; deduced transmission, resonance parameters, distributions of total radiation widths for 197Au neutron resonances . R-matrix analysis. Comparison with available data, ENDF library. An early version of the Device for Indirect Capture Experiments on Radionuclides (DICER), which is under development at the Los Alamos Neutron Science Center (LANSCE).
doi: 10.1140/epja/s10050-022-00842-3
2022LA09 Phys.Rev. C 106, 025802 (2022) A.Laminack, J.C.Blackmon, A.Couture, J.P.Greene, M.Krticka, K.T.Macon, S.Mosby, C.Prokop, J.L.Ullmann, S.Valenta Measurement of neutron-capture cross sections of 70, 72Ge using the DANCE facility NUCLEAR REACTIONS 70,72Ge(n, γ), E=0.000001-1 MeV; measured Eγ, Iγ, γ sum energy; deduced neutron capture σ(E), Maxwellian averaged σ(E). Comparison to other experimental results and evaluated data from ENDF/B-VIII.0, KADoNiS-v1.0. Presented analysis of the impact of measured σ on stellar nucleosynthesis abundances.Detector for Advanced Neutron Capture Experiments (DANCE) consisting of 160 BaF2 detectors combined into calorimeter at Los Alamos Neutron Science Center (LANSCE, LANL).
doi: 10.1103/PhysRevC.106.025802
2020KE05 Phys.Rev. C 102, 034615 (2020) K.J.Kelly, M.Devlin, J.M.O'Donnell, J.A.Gomez, D.Neudecker, R.C.Haight, T.N.Taddeucci, S.M.Mosby, H.Y.Lee, C.Y.Wu, R.Henderson, P.Talou, T.Kawano, A.E.Lovell, M.C.White, J.L.Ullmann, N.Fotiades, J.Henderson, M.Q.Buckner Measurement of the 239Pu(n, f) prompt fission neutron spectrum from 10 keV to 10 MeV induced by neutrons of energy 1-20 MeV NUCLEAR REACTIONS 239Pu(n, F), E=1-20 MeV; measured outgoing prompt fission neutron spectrum (PFNS) in the range of E(n)=0.01-10 MeV, I(n) using Li-glass detector array and 54-detector EJ-309 liquid scintillator array in Chi-Nu experiment at the WNR-LANSCE-Los Alamos facility; deduced correlation matrix for PFNS from the Li-glass and the liquid scintillator. Comparison of present PFNS results with previous experimental results, and with evaluated data in ENDF/B-VIII.0 and JEFF-3.3 libraries.
doi: 10.1103/PhysRevC.102.034615
2020SI05 Phys.Rev. C 101, 024302 (2020) N.Simbirtseva, M.Krticka, R.F.Casten, A.Couture, W.I.Furman, I.Knapova, J.M.O'Donnell, G.Rusev, J.L.Ullmann, S.Valenta Examination of photon strength functions and nuclear level density in 196Pt from the γ-ray spectra measured at the DANCE facility NUCLEAR REACTIONS 195Pt(n, γ), E=9-1000 eV; measured E(n) by time of flight, Eγ, Iγ, γγ-coin, multi-step γ-ray cascades (MSCs) using the segmented γ-ray Detector for Advanced Neutron Capture (DANCE) of 160 BaF2 crystals at the Los Alamos Neutron Science Center (LANSC). 196Pt; deduced nuclear level density (NLD) and photon strength functions (PSFs); confirmed E1 PSF resonance at ≈5.6 MeV. Comparison of experimental MSC spectra with previous experimental data from Oslo and others, and with constant-temperature (CT) and back-shifted Fermi-gas (BSFG) model calculations.
doi: 10.1103/PhysRevC.101.024302
2019EB01 Phys.Rev. C 99, 064603 (2019) A.Ebran, O.Roig, V.Meot, M.Jandel, C.Theroine, E.M.Bond, T.A.Bredeweg, A.Couture, F.M.Nortier, J.M.O'Donnell, W.A.Taylor, J.L.Ullmann, D.J.Vieira Cross section for the neutron radiative capture on 173Lu nuclei NUCLEAR REACTIONS 173,174,175Lu(n, γ), (n, X), E=0.025-200 eV; measured Eγ, Iγ, and neutron radiative capture σ(E) using the DANCE detector with high-γ activity target at the Los Alamos Neutron Science Center (LANSCE) spallation neutron source facility; deduced resonance energies, J, Γγ, Γn for 102 resonances from 3.1-202.8 eV for 173Lu(n, γ). TALYS and SAMMY codes used for analysis of resonance data, and QRPA model for interpretation of the high gamma activity target.
doi: 10.1103/PhysRevC.99.064603
2019WI03 Phys.Rev. C 99, 024318 (2019) J.R.Winkelbauer, S.M.Mosby, A.Couture, H.Y.Lee, J.L.Ullmann, T.Kawano, G.Rusev, M.Jandel, M.Krticka Statistical neutron capture in the limit of low nuclear level density NUCLEAR REACTIONS 96Zr, 208Pb(n, γ), E=thermal, 301, 3818, 4133, 5443, 5971, 9004, 17779 eV; measured Eγ, Iγ, γγ-coin, Spectra of γ-ray cascades using DANCE array at the LANSCE-LANL facility. 97Zr; deduced photon strength function (γPSF), multiplicity distributions for resonances. Comparison with simulated γ spectra from DICEBOX calculations for the cascades from the capture state and neutron resonances, and with ENSDF/B-VII.1 evaluation. Maxwellian averaged cross section (MACS).
doi: 10.1103/PhysRevC.99.024318
2018CH34 Phys.Lett. B 782, 652 (2018) A.Chyzh, P.Jaffke, C.Y.Wu, R.A.Henderson, P.Talou, I.Stetcu, J.Henderson, M.Q.Buckner, S.A.Sheets, R.Hughes, B.Wang, J.L.Ullmann, S.Mosby, T.A.Bredeweg, A.C.Hayes-Sterbenz, J.M.O'Donnell Dependence of the prompt fission γ-ray spectrum on the entrance channel of compound nucleus: Spontaneous vs. neutron-induced fission RADIOACTIVITY 240,242Pu(SF); measured decay products, Eγ, Iγ; deduced prompt γ-ray spectra. NUCLEAR REACTIONS 239,241Pu(n, F), E ∼ 100 keV; measured reaction products, Eγ, Iγ; deduced prompt fission γ-ray energy spectra. Comparison with Monte Carlo Hauser-Feshbach statistical model for the neutron-induced fission.
doi: 10.1016/j.physletb.2018.06.006
2018DE08 Nucl.Data Sheets 148, 322 (2018) M.Devlin, J.A.Gomez, K.J.Kelly, R.C.Haight, J.M.O'Donnell, T.N.Taddeucci, H.Y.Lee, S.M.Mosby, B.A.Perdue, N.Fotiades, J.L.Ullmann, C.Y.Wu, B.Bucher, M.Q.Buckner, R.A.Henderson, D.Neudecker, M.C.White, P.Talou, M.E.Rising, C.J.Solomon The Prompt Fission Neutron Spectrum of 235U(n, f) below 2.5 MeV for Incident Neutrons from 0.7 to 20 MeV NUCLEAR REACTIONS 235U(n, F), E=0.7-20 MeV; measured reaction products, En, In, TOF; deduced prompt fission neutron spectrum, σ(E).
doi: 10.1016/j.nds.2018.02.008
2018MO08 Phys.Rev. C 97, 041601 (2018) S.Mosby, T.A.Bredeweg, A.Couture, M.Jandel, T.Kawano, J.L.Ullmann, R.A.Henderson, C.Y.Wu Unifying measurement of 239Pu(n, γ) in the keV to MeV energy regime NUCLEAR REACTIONS 239Pu(n, γ), E=0.001-1.3 MeV; measured Eγ, Iγ, σ(E), using the Detector for Advanced Neutron Capture Experiments (DANCE) at LANL-LANSCE facility. Comparison with previous experimental results, evaluated data in ENDF/B-VII.1, ENDF/B-VIII.0, JENDL-4, and with theoretical calculations using CoH3 for the M1 scissors mode.
doi: 10.1103/PhysRevC.97.041601
2017BA28 Phys.Rev. C 96, 024619 (2017) B.Baramsai, M.Jandel, T.A.Bredeweg, E.M.Bond, A.R.Roman, G.Rusev, C.L.Walker, A.Couture, S.Mosby, J.M.O'Donnell, J.L.Ullmann, T.Kawano Radiative neutron capture cross section from 236U NUCLEAR REACTIONS 236U(n, γ), E=10 eV-800 keV; measured neutron time-of-flight spectrum, Eγ, Iγ, (n-resonance)γ-coin using the Detector for Advanced Neutron Capture Experiments (DANCE) γ-ray calorimeter at the Los Alamos Neutron Science Center; deduced multistep cascade spectra and multiplicity distribution of strong resonances, average multiplicity of resonances, capture σ(E), energies, Γγ, and Γn of neutron resonances for E(n)=29.8-998.1 eV. R-matrix analysis using code SAMMY. Comparison with earlier experimental data, and with ENDF/B-VII.1 and JEFF-3.2 nuclear data libraries.
doi: 10.1103/PhysRevC.96.024619
2017BU04 Phys.Rev. C 95, 024610 (2017) M.Q.Buckner, C.Y.Wu, R.A.Henderson, B.Bucher, N.Wimer, A.Chyzh, T.A.Bredeweg, B.Baramsai, A.Couture, M.Jandel, S.Mosby, J.L.Ullmann Measurement of the 242mAm neutron-induced reaction cross sections NUCLEAR REACTIONS 242mAm(n, γ), (n, F), E=0.023-0.98 eV; measured Eγ, Iγ, σ(E) for both reactions using DANCE array of 160 BaF2 crystals at LANSCE-LLNL facility. Comparison with previous experimental data.
doi: 10.1103/PhysRevC.95.024610
2017BU10 Phys.Rev. C 95, 061602 (2017) M.Q.Buckner, C.Y.Wu, R.A.Henderson, B.Bucher, N.Wimer, A.Chyzh, T.A.Bredeweg, B.Baramsai, A.Couture, M.Jandel, S.Mosby, J.L.Ullmann Comprehensive 242mAm neutron-induced reaction cross sections and resonance parameters NUCLEAR REACTIONS 242mAm(n, γ), (n, F), E=0.1 eV to 1 MeV; measured Eγ, Iγ, neutron capture and neutron-induced fission σ(E) using DANCE array of 160 equal-volume BaF2 crystals at the LANSCE-LLNL Lujan Neutron Scattering Center; deduced neutron-induced resonance energies, Γγ, Γn, and Γf of 106 resonances with energies between 0.15 and 45 eV by analyzing spectra using the R-matrix code SAMMY. Comparison with previous experimental data, and with evaluated data in ENDF/B-VII.1.
doi: 10.1103/PhysRevC.95.061602
2017MU13 Phys.Rev. C 96, 024612 (2017) M.R.Mumpower, T.Kawano, J.L.Ullmann, M.Krticka, T.M.Sprouse Estimation of M1 scissors mode strength for deformed nuclei in the medium- to heavy-mass region by statistical Hauser-Feshbach model calculations NUCLEAR REACTIONS 152,154,155,156,157,158Gd(n, γ), E=1 keV-4.5 MeV; calculated capture σ(E) with and without M1 scissors mode strength, capture γ-ray spectra, and compared with available experimental data. A=90-200; calculated capture cross sections at 200 keV with and without M1 scissors mode strength, and compared with evaluated cross sections in ENDF/B-VII.1 and JENDL-4 libraries; deduced additional M1 strength for nuclei in the fission product region nuclei required to reproduce evaluated capture cross section. A=50-250; calculated average photon width Γγ and compared with values in RIPL-3 database. Z=10-100, N=10-180; evaluated M1 enhancement of neutron capture reaction rates at a temperature of 1.0 GK. A=100-250; deduced isotopic abundances with the inclusion of M1 enhancement in the neutron capture rates relevant to r-process simulations. Impact of M1 scissors mode on neutron capture cross sections. Hauser-Feshbach calculation with a simple Lorentzian form for the M1 scissors mode.
doi: 10.1103/PhysRevC.96.024612
2017UL01 Phys.Rev. C 96, 024627 (2017), Erratum Phys.Rev. C 96, 019902 (2017) J.L.Ullmann, T.Kawano, B.Baramsai, T.A.Bredeweg, A.Couture, R.C.Haight, M.Jandel, J.M.O'Donnell, R.S.Rundberg, D.J.Vieira, J.B.Wilhelmy, M.Krticka, J.A.Becker, A.Chyzh, C.Y.Wu, G.E.Mitchell Constraining the calculation of 234, 236, 238U (n, γ) cross sections with measurements of the γ-ray spectra at the DANCE facility NUCLEAR REACTIONS 234U(n, γ), E=31, 77 eV; 236U(n, γ), E=44, 71 eV; 238U(n, γ), E=21, 36, 66, 102 eV; measured Eγ, Iγ for 1/2+ neutron-resonances using the Detector for Advanced Neutron Capture Experiments (DANCE) at Los Alamos Neutron Science Center (LANSC); deduced total radiation widths Γγ of s-wave 1/2+ resonances using different models of photon strength function (PSF) and nuclear level-density (NLD) parametrizations, and significant contribution to Γγ from a resonance structure at Eγ=2-3 MeV, identified with the M1 scissors mode; comparison of measured and summed γ spectra with calculations using the PSF and NLD parameters obtained from the Oslo method, from renormalized Oslo results, from systematics used in the CoH3 code, and from the MGLO and CoH3 models for the E1 strength. 234,236,238U(n, γ), E=1-500 keV; calculated σ(E) and compared with previous experimental data listed in the EXFOR database, and with ENDFB/VII-1 evaluation.
doi: 10.1103/PhysRevC.96.024627
2017VA25 Phys.Rev. C 96, 054315 (2017) S.Valenta, B.Baramsai, T.A.Bredeweg, A.Couture, A.Chyzh, M.Jandel, J.Kroll, M.Krticka, G.E.Mitchell, J.M.O'Donnell, G.Rusev, J.L.Ullmann, C.L.Walker Examination of photon strength functions for 162, 164Dy from radiative capture of resonance neutrons NUCLEAR REACTIONS 161,163Dy(n, γ), E=10-40 s-wave neutrons; measured time-of-flight spectrum for neutrons, Eγ, Iγ using segmented γ-ray calorimeter Detector for Advanced Neutron Capture Experiments (DANCE), an array of BaF2 scintillators at Los Alamos Neutron Science Center (LANSCE) spallation neutron source; deduced neutron resonances, cluster multiplicities, multistep cascade (MSC) spectra, E1 and M1 photon strength functions (PSFs) as function of γ-ray energy, total radiation widths, scissors mode, nuclear level density. Comparison with other experimental data, and with statistical model calculations.
doi: 10.1103/PhysRevC.96.054315
2017WE02 Phys.Rev. C 95, 015808 (2017) M.Weigand, C.Beinrucker, A.Couture, S.Fiebiger, M.Fonseca, K.Gobel, M.Heftrich, T.Heftrich, M.Jandel, F.Kappeler, A.Krasa, C.Lederer, H.Y.Lee, R.Plag, A.Plompen, R.Reifarth, S.Schmidt, K.Sonnabend, J.L.Ullmann 63Cu (n, γ) cross section measured via 25 keV activation and time of flight NUCLEAR REACTIONS 63Cu(n, γ), E=75 eV to 500 keV; measured Eγ, Iγ, time of flight, σ(E) by activation with a quasistellar neutron spectrum at JRC-Geel, and the energy dependence of the cross section measured with an isotopically enriched 63Cu sample placed in the center of the DANCE detector array at LANSCE-LANL facility; deduced Maxwellian-averaged cross sections for the whole temperature range relevant for different scenarios of the s-process nucleosynthesis. Comparison with previous experimental measurements and with evaluated cross sections from TENDL-2015.
doi: 10.1103/PhysRevC.95.015808
2016AL19 Phys.Rev. C 94, 034617 (2016) J.B.Albert, S.J.Daugherty, T.N.Johnson, T.O'Conner, L.J.Kaufman, A.Couture, J.L.Ullmann, M.Krticka Measurement of neutron capture on 136Xe NUCLEAR REACTIONS 136Xe(n, γ), E=0.01 eV to 1 MeV; measured prompt Eγ, Iγ, multistep cascade (MSC) spectra using DANCE Los Alamos Neutron Science Center; deduced relative and absolute cross sections, neutron resonance at 2.154 keV, capture cascade γ-ray emission intensities by DICEBOX simulations. Comparison of measured cross section with previous experimental results, and with evaluated data in ENDF-B/VII.1 and JENDL-4.0. Relevance to experiments on 136Xe 0νββ decay and presence of 137Xe contaminant in such experiments.
doi: 10.1103/PhysRevC.94.034617
2016BU09 Phys.Rev. C 93, 044613 (2016) M.Q.Buckner, C.Y.Wu, R.A.Henderson, B.Bucher, A.Chyzh, T.A.Bredeweg, B.Baramsai, A.Couture, M.Jandel, S.Mosby, J.M.O'Donnell, J.L.Ullmann Absolute measurement of the 242Pu neutron-capture cross section NUCLEAR REACTIONS 242Pu(n, γ), E=thermal-several hundred keV; measured Eγ, Iγ, summed γ-ray energy versus cluster multiplicity using LANSC-DANCE at LLNL facility, absolute σ(E) from thermal to ≈40 keV neutrons; deduced energies, Γγ and Γn of neutron resonances from 2.662 eV to 495.0 eV. Comparison with literature and evaluated data in ENDF/B-VII.1.
doi: 10.1103/PhysRevC.93.044613
2016DE30 Phys.Rev. C 94, 054612 (2016) D.Denis-Petit, O.Roig, V.Meot, B.Morillon, P.Romain, M.Jandel, T.Kawano, D.J.Vieira, E.M.Bond, T.A.Bredeweg, A.J.Couture, R.C.Haight, A.L.Keksis, R.S.Rundberg, J.L.Ullmann Isomeric ratio measurements for the radiative neutron capture 176Lu(n, γ) at the LANL DANCE facility NUCLEAR REACTIONS 176Lu(n, γ), E=8.5 eV-100 keV; measured Eγ, Iγ, delayed γ spectra using DANCE array at the LANSCE-LANL facility; deduced isomeric ratios to the 5/2-, 761.7 keV and 15/2+, 1356.9 keV nanosecond isomers in 177Lu. Comparison with TALYS calculations using different models for photon strength functions, level densities, and optical potentials.
doi: 10.1103/PhysRevC.94.054612
2016EN01 Nucl.Instrum.Methods Phys.Res. B366, 206 (2016) J.W.Engle, S.G.Mashnik, L.A.Parker, K.R.Jackman, L.J.Bitteker, J.L.Ullmann, M.S.Gulley, C.Pillai, K.D.John, E.R.Birnbaum, F.M.Nortier Nuclear excitation functions from 40 to 200 MeV proton irradiation of terbium NUCLEAR REACTIONS Tb(p, X)153Dy/155Dy/157Dy/159Dy/151Tb/152Tb/153Tb/154Tb/155Tb/156Tb/158Tb/146Gd/147Gd/149Gd/151Gd/153Gd/145Eu/146Eu/147Eu/148Eu/149Eu, E=40-200 MeV; measured reaction products, Eγ, Iγ; deduced σ. ALICE2011, CEM03.03, Bertini, INCL + ABLA nuclear model code calculations.
doi: 10.1016/j.nimb.2015.10.049
2016RO08 Phys.Rev. C 93, 034602 (2016) O.Roig, M.Jandel, V.Meot, E.M.Bond, T.A.Bredeweg, A.J.Couture, R.C.Haight, A.L.Keksis, R.S.Rundberg, J.L.Ullmann, D.J.Vieira Radiative neutron capture cross sections on 176Lu at DANCE NUCLEAR REACTIONS 176Lu(n, γ), E=0.02-100 keV; measured Eγ, Iγ, neutron flux, σ(E) using 4π BaF2 array DANCE at LANSCE-LANL; deduced radiative capture yield as function of neutron energy, resonances from 0.138-906 eV, J, Γγ and Γn versus neutron energy, resonance parameters using R-matrix analysis with SAMMY-7.0 code, Maxwellian averaged cross sections (MACS) in a stellar plasma for thermal energies between 5-100 keV. Comparison with theoretical calculations and evaluations in Atlas of Neutron resonances (2006), ENSDF/B-VII.1, JEFF-3.2, BRC and KADoNiS databases, and with previous experimental data.
doi: 10.1103/PhysRevC.93.034602
2015HA01 Nucl.Data Sheets 123, 130 (2015) R.C.Haight, C.Y.Wu, H.Y.Lee, T.N.Taddeucci, B.A.Perdue, J.M.O'Donnell, N.Fotiades, M.Devlin, J.L.Ullmann, T.A.Bredeweg, M.Jandel, R.O.Nelson, S.A.Wender, D.Neudecker, M.E.Rising, S.Mosby, S.Sjue, M.C.White, B.Bucher, R.Henderson The LANL/LLNL Prompt Fission Neutron Spectrum Program at LANSCE and Approach to Uncertainties NUCLEAR REACTIONS 239Pu(n, F), E<15 MeV; analyzed available data; deduced possible prompt fission neutron spectra σ, yields, correlation matrices.
doi: 10.1016/j.nds.2014.12.023
2015JA07 Eur.Phys.J. A 51, 179 (2015) M.Jandel, B.Baramsai, E.Bond, G.Rusev, C.Walker, T.A.Bredeweg, M.B.Chadwick, A.Couture, M.M.Fowler, A.Hayes, T.Kawano, S.Mosby, I.Stetcu, T.N.Taddeucci, P.Talou, J.L.Ullmann, D.J.Vieira, J.B.Wilhelmy Capture and fission with DANCE and NEUANCE
doi: 10.1140/epja/i2015-15179-7
2015TA03 Nucl.Data Sheets 123, 135 (2015) T.N.Taddeucci, R.C.Haight, H.Y.Lee, D.Neudecker, J.M.O'Donnell, M.C.White, B.A.Perdue, M.Devlin, N.Fotiadis, J.L.Ullmann, R.O.Nelson, T.A.Bredeweg, M.E.Rising, S.K.Sjue, S.A.Wender, C.Y.Wu, R.Henderson Multiple-scattering Corrections to Measurements of the Prompt Fission Neutron Spectrum NUCLEAR REACTIONS 239Pu(n, F), E<15 MeV; analyzed available data; deduced response functions, the shape of the prompt fission neutron spectrum.
doi: 10.1016/j.nds.2014.12.024
2015WA18 Phys.Rev. C 92, 014324 (2015) C.L.Walker, M.Krticka, B.Baramsai, F.Becvar, T.A.Bredeweg, A.Chyzh, R.C.Haight, M.Jandel, J.Kroll, G.E.Mitchell, J.M.O'Donnell, R.S.Rundberg, J.L.Ullmann, S.Valenta, J.B.Wilhelmy Measurement of the 97Mo(n, γ) reaction with the DANCE γ calorimeter array NUCLEAR REACTIONS 97Mo(n, γ), E<1.7 eV. Measured Eγ, Iγ, multistep gamma cascades (MSCs) with the DANCE array of 160 BaF2 detectors at the LANSCE-LANL facility. 98Mo; deduced neutron resonances, J, π, neutron widths, photon-strength functions (PSFs), simulated total radiation width of resonances for all considered model combinations. Analysis using DICEBOX statistical computer code. 93,95,99Mo, 94Nb, 100Ru; deduced photon-strength functions (PSFs) using averaged s-wave resonance spacings D0 from literature. Comparison with statistical model calculations.
doi: 10.1103/PhysRevC.92.014324
2015WE14 Phys.Rev. C 92, 045810 (2015) M.Weigand, T.A.Bredeweg, A.Couture, K.Gobel, T.Heftrich, M.Jandel, F.Kappeler, C.Lederer, N.Kivel, G.Korschinek, M.Krticka, J.M.O'Donnell, J.Ostermoller, R.Plag, R.Reifarth, D.Schumann, J.L.Ullmann, A.Wallner 63Ni(n, γ) cross sections measured with DANCE NUCLEAR REACTIONS 63Ni(n, γ), E=40 eV-500 keV; measured Eγ, Iγ, σ(E) using 4π BaF2 array DANCE at LANSCE-LANL, neutron flux; deduced resonances, Maxwellian averaged cross sections (MACS), relative production of isotopes in the vicinity of 63Ni and Ni to As elements for the s process. Comparison with KADoNiS database and experimental data from n_TOF collaboration.
doi: 10.1103/PhysRevC.92.045810
2014CH30 Phys.Rev. C 90, 014602 (2014) A.Chyzh, C.Y.Wu, E.Kwan, R.A.Henderson, T.A.Bredeweg, R.C.Haight, A.C.Hayes-Sterbenz, H.Y.Lee, J.M.O'Donnell, J.L.Ullmann Total prompt γ-ray emission in fission of 235U, 239, 241Pu, and 252Cf NUCLEAR REACTIONS 235U, 239,241Pu(n, F), E=0.025 eV-100 keV; measured Eγ, Iγ of prompt γ rays, fission fragments using DANCE detector array for γ rays and parallel-plate avalanche counter for fission fragments at LLNL facility; deduced γ-ray multiplicity distributions, mean values of the total prompt γ-ray energy. Discussed γ heating in nuclear reactors. Comparison with previous experimental results and ENDF/B-VII.1 evaluation. RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ of prompt γ rays, fission fragments using DANCE detector array for γ rays and parallel-plate avalanche counter for fission fragments at LLNL facility; deduced γ-ray multiplicity distributions, mean values of the total prompt γ-ray energy. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.90.014602
2014EN01 Radiochim.Acta 107, 569 (2014) J.W.Engle, J.W.Weidner, B.D.Ballard, M.E.Fassbender, L.A.Hudston, K.R.Jackman, D.E.Dry, L.E.Wolfsberg, L.J.Bitteker, J.L.Ullmann, M.S.Gulley, C.Pillai, G.Goff, E.R.Birnbaum, K.D.John, S.G.Mashnik, F.M.Nortier Ac, La, and Ce radioimpurities in 225Ac produced in 40-200 MeV proton irradiations of thorium NUCLEAR REACTIONS Th(p, X)225Ac/227Ac/139Ce/141Ce/143Ce/140La/140Ba, E=40-200 MeV; measured reaction products, Eγ, Iγ; deduced yields, σ. Comparison with theoretical calculations, available data.
doi: 10.1515/ract-2013-2179
2014HA27 Nucl.Data Sheets 119, 205 (2014) R.C.Haight, H.Y.Lee, T.N.Taddeucci, J.M.O'Donnell, B.A.Perdue, N.Fotiades, M.Devlin, J.L.Ullmann, A.Laptev, T.Bredeweg, M.Jandel, R.O.Nelson, S.A.Wender, M.C.White, C.Y.Wu, E.Kwan, A.Chyzh, R.Henderson, J.Gostic The Prompt Fission Neutron Spectrum (PFNS) Measurement Program at LANSCE
doi: 10.1016/j.nds.2014.08.057
2014KR08 Nucl.Data Sheets 119, 158 (2014) J.Kroll, U.Agvaanluvsan, B.Baramsai, J.A.Becker, F.Becvar, T.A.Bredeweg, A.Chyzh, A.Couture, D.Dashdorj, R.C.Haight, M.Jandel, A.L.Keksis, M.Krticka, G.E.Mitchell, J.M.O'Donnell, W.Parker, R.S.Rundberg, J.L.Ullmann, S.Valenta, D.J.Vieira, C.L.Walker, J.B.Wilhelmy, J.M.Wouters, C.Y.Wu Systematics of Scissors Mode in Gd Nuclei from Experiments with the DANCE Detector NUCLEAR REACTIONS 152,154,155,156,157,158Gd(n, γ), E=subthermal-1 MeV; measured Eγ, Iγ using ToF LANSCE/DANCE array (BaF2); calculated γ emission, γ cascades using MSC code DICEBOX with fitted parameters and all models of RIPL-3; deduced M1 scissors mode vibrations; calculated scissors mode B(M1) vs deformation for (n, γ), (γ, γ') and 3He-induced reactions data.
doi: 10.1016/j.nds.2014.08.044
2014KW05 Nucl.Data Sheets 119, 221 (2014) E.Kwan, C.Y.Wu, R.C.Haight, H.Y.Lee, T.A.Bredeweg, A.Chyzh, M.Devlin, N.Fotiades, J.M.Gostic, R.A.Henderson, M.Jandel, A.Laptev, R.O.Nelson, J.M.O'Donnell, B.A.Perdue, T.N.Taddeucci, J.L.Ullmann, S.A.Wender Prompt Fission γ-rays Measured Using Liquid Scintillators NUCLEAR REACTIONS 235U(n, F), E=1-20 MeV; measured prompt Eγ, Iγ, γγ-coin using FIGARO; deduced γ-ray spectrum, unfolded using SVD and iterative Bayesian techniques. Compared to 235Cf(SF). RADIOACTIVITY 235Cf(SF); measured prompt Eγ, Iγ, γγ-coin using FIGARO; deduced γ-ray spectrum, unfolded using SVD and iterative Bayesian techniques. Compared to 235U(n, F).
doi: 10.1016/j.nds.2014.08.061
2014MO21 Nucl.Data Sheets 119, 31 (2014) S.Mosby, C.Arnold, T.A.Bredeweg, A.Chyzh, A.Couture, R.Henderson, M.Jandel, E.Kwan, J.M.O'Donnell, G.Rusev, J.L.Ullmann, C.Y.Wu Neutron Capture Cross Section of 239Pu NUCLEAR REACTIONS 239Pu(n, γ), E=10 eV - 100 keV; measured prompt fission Eγ, Iγ using DANCE; deduced σ. Preliminary. Compared to ENDF/B-VII.1.
doi: 10.1016/j.nds.2014.08.010
2014PE14 Nucl.Data Sheets 119, 371 (2014) B.A.Perdue, T.N.Taddeucci, R.C.Haight, T.Bredeweg, M.Devlin, N.Fotiades, M.Jandel, A.Laptev, H.Y.Lee, R.O.Nelson, J.M.O'Donnell, J.L.Ullmann, S.A.Wender, C.Y.Wu, E.Kwan, A.Chyzh, R.A.Henderson, J.M.Gostic Development of an Array of Liquid Scintillators to Measure the Prompt Fission Neutron Spectrum at LANSCE
doi: 10.1016/j.nds.2014.08.102
2014RO17 Nucl.Data Sheets 119, 165 (2014) O.Roig, C.Theroine, A.Ebran, V.Meot, E.M.Bond, T.A.Bredeweg, A.Couture, R.C.Haight, M.Jandel, F.M.Nortier, J.M.O'Donnell, R.S.Rundberg, W.A.Taylor, J.L.Ullmann, D.J.Vieira Measurement of 173Lu(n, γ) Cross Sections at DANCE NUCLEAR REACTIONS 173Lu(n, γ), E=0-200 eV[target from Hf(p, xn)]; measured Eγ, Iγ using DANCE array; deduced radiative capture yield vs neutron energy, reduced neutron width vs neutron energy, resonances, resonance parameters; calculated radiative neutron capture σ from resonance parameters using SAMMY-7.0, σ from ROSFOND2010 data using TALYS.
doi: 10.1016/j.nds.2014.08.046
2014UL01 Phys.Rev. C 89, 034603 (2014) J.L.Ullmann, T.Kawano, T.A.Bredeweg, A.Couture, R.C.Haight, M.Jandel, J.M.O'Donnell, R.S.Rundberg, D.J.Vieira, J.B.Wilhelmy, J.A.Becker, A.Chyzh, C.Y.Wu, B.Baramsai, G.E.Mitchell, M.Krticka Cross section and γ-ray spectra for 238U(n, γ) measured with the DANCE detector array at the Los Alamos Neutron Science Center NUCLEAR REACTIONS 238U(n, γ), E=1-500 keV; measured Eγ, Iγ, σ(E) using DANCE array at LANSCE-LLNL spallation neutron source facility. Comparison with Hauser-Feshbach calculations using CoH3 computer code and cascade spectra calculations by DICEBOX code using level data from ENSDF database, with evaluated cross section in ENDF/B-VII.1, and with previous experimental data. M1 scissors mode contribution to the radiative strength function.
doi: 10.1103/PhysRevC.89.034603
2014UL02 Nucl.Data Sheets 119, 22 (2014) J.L.Ullmann, S.Mosby, T.A.Bredeweg, A.J.Couture, R.C.Haight, M.Jandel, T.Kawano, J.M.O'Donnell, R.S.Rundberg, D.J.Vieira, J.B.Wilhelmy, C.-Y.Wu, J.A.Becker, A.Chyzh, B.Baramsai, G.E.Mitchell, M.Krticka Neutron Capture Cross Sections and Gamma Emission Spectra from Neutron Capture on 234, 236, 238U Measured with DANCE NUCLEAR REACTIONS 234,236,238U(n, γ), E=10 eV-700 keV; measured Eγ, Iγ using DANCE at LANSCE; deduced two-step cascade γ-ray spectrum. 238U deduced σ. Cross sections compared with data and ENDF/B-VII.
doi: 10.1016/j.nds.2014.08.008
2013BA15 Phys.Rev. C 87, 044609 (2013) B.Baramsai, J.Kroll, G.E.Mitchell, U.Agvaanluvsan, F.Becvar, T.A.Bredeweg, A.Chyzh, A.Couture, D.Dashdorj, R.C.Haight, M.Jandel, A.L.Keksis, M.Krticka, J.M.O'Donnell, R.S.Rundberg, J.L.Ullmann, D.J.Vieira, C.L.Walker Photon strength functions of 156Gd from radiative capture of resonance neutrons NUCLEAR REACTIONS 155Gd(n, γ), E=7.8, 21.0 eV; measured Eγ, Iγ, sum energy spectra, cluster multiplicity of γ cascades using DANCE γ-ray calorimeter at LANSCE facility; deduced spectra of multistep γ cascades (MSCs) and those of gated MSCs, E1 and M1 photon strength functions, scissors mode. DICEBOX algorithm. Validity of various photon strength functions (PSF), and nuclear level density (NLD) models Comparison with previous experimental studies, and with theoretical calculations.
doi: 10.1103/PhysRevC.87.044609
2013CH15 Phys.Rev. C 87, 034620 (2013) A.Chyzh, C.Y.Wu, E.Kwan, R.A.Henderson, J.M.Gostic, T.A.Bredeweg, A.Couture, R.C.Haight, A.C.Hayes-Sterbenz, M.Jandel, H.Y.Lee, J.M.O'Donnell, J.L.Ullmann Systematics of prompt γ-ray emission in fission NUCLEAR REACTIONS 235U, 239,241Pu(n, F), E=thermal to 1 MeV; measured prompt Eγ, Iγ, charged particles, (particle)γ(t), γ multiplicity, total γ-ray energy vs cluster multiplicity, TOF using DANCE array and PPACs at LANSCE facility. Possible population of pygmy resonances. Comparison of measured γ-ray multiplicity distributions with iterative Bayesian and SVD methods.
doi: 10.1103/PhysRevC.87.034620
2013CH48 Phys.Rev. C 88, 044607 (2013) A.Chyzh, C.Y.Wu, E.Kwan, R.A.Henderson, J.M.Gostic, T.A.Bredeweg, A.Couture, R.C.Haight, H.Y.Lee, J.M.O'Donnell, J.L.Ullmann Precision measurement of the 238Pu (n, γ) cross section NUCLEAR REACTIONS 238Pu(n, γ), E=thermal-30 keV; measured Eγ, Iγ, summed-γ spectra, γ-ray multiplicity, precise σ(E) using DANCE array at LANSCE facility; deduced resonance parameters, energies, γ and neutron widths from 2.87 eV to 407 eV energy region. Comparison with evaluated data in ENDF/B-VII.1.
doi: 10.1103/PhysRevC.88.044607
2013EN02 Phys.Rev. C 88, 014604 (2013) J.W.Engle, S.G.Mashnik, J.W.Weidner, L.E.Wolfsberg, M.E.Fassbender, K.Jackman, A.Couture, L.J.Bitteker, J.L.Ullmann, M.S.Gulley, C.Pillai, K.D.John, E.R.Birnbaum, F.M.Nortier Cross sections from proton irradiation of thorium at 800 MeV NUCLEAR REACTIONS 232Th(p, X)7Be/46Sc/48Sc/59Fe/74As/76As/77Br/82Br/86Rb/87Y/87mY/88Y/91Sr/95Nb/96Nb/95Tc/96Tc/99Tc/95Zr/99Mo/100Pd/100Rh/105Rh/103Ru/105Ru/106mAg/110mAg/111In/114mIn/115Cd/117mSn/120Sb/122Sb/124Sb/126Sb/127Sb/121mTe/123mTe/123I/124I/126I/130I/131I/133I/135I/127Xe/135Xe/131Ba/140Ba/134Cs/136Cs/139Ce/143Ce/188Pt/200Pb/203Bi/205Bi/204Po/206Po/207Po/209At/210At/211Rn/226Ac, E=800 MeV; measured Eγ, Iγ, σ by activation method at WNRF-LANSCE, Los Alamos facility. 99Mo, 139,143Ce, 140Ba, 203,205Bi, 223,225Ra, 225,226,227Ac; deduced yields and instantaneous reaction rates. Comparison of measured cross sections with calculations using CEM03.03, Bertini, and INCL+ABLA transportation codes of MCNP6 event generator; and with previous experimental data. Application to design of spallation-based radioisotope production for multiple radiotherapeutic pharmaceutical agents.
doi: 10.1103/PhysRevC.88.014604
2013KO05 Fortsch.Phys. 61, 80 (2013) P.E.Koehler, F.Becvar, M.Krticka, K.H.Guber, J.L.Ullmann Neutron resonance data exclude random matrix theory NUCLEAR REACTIONS 147Sm, 192,194Pt, 232Th(n, γ), E<15 keV; analyzed available data; deduced disagreements with random matrix theory.
doi: 10.1002/prop.201200067
2013KR07 Phys.Scr. T154, 014009 (2013) J.Kroll, F.Becvar, M.Krticka, S.Valenta, B.Baramsai, G.E.Mitchell, C.L.Walker, T.A.Bredeweg, A.Couture, R.C.Haight, M.Jandel, J.M.O'Donnell, R.S.Rundberg, J.L.Ullmann, D.J.Vieira, J.B.Wilhelmy, J.M.Wouters, J.A.Becker, A.Chyzh, D.Dashdorj, W.Parker, C.Y.Wu Scissors mode of Gd nuclei measured, with the DANCE detector NUCLEAR REACTIONS 152,154,155,156,157,158Gd(n, γ), E<1 MeV; measured reaction products, Eγ, Iγ; deduced photon strength, summed scissors-mode strength B(M1). Comparison with available data.
doi: 10.1088/0031-8949/2013/T154/014009
2013KR11 Phys.Rev. C 88, 034317 (2013) J.Kroll, B.Baramsai, G.E.Mitchell, U.Agvaanluvsan, F.Becvar, T.A.Bredeweg, A.Chyzh, A.Couture, D.Dashdorj, R.C.Haight, M.Jandel, A.L.Keksis, M.Krticka, J.M.O'Donnell, W.Parker, R.S.Rundberg, J.L.Ullmann, S.Valenta, D.J.Vieira, C.Walker, C.Y.Wu Strength of the scissors mode in odd-mass Gd isotopes from the radiative capture of resonance neutrons NUCLEAR REACTIONS 152,154,156,158Gd(n, γ), E<1 MeV white neutron spectrum; measured multistep cascade (MSC) γ spectra for different multiplicities and several resolved s-wave resonances using DANCE array at LANSCE, LANL facility; deduced E1 and M1 photon strength functions, level density. GEANT4-based simulations. Comparison with several model calculations of photon strength functions (PSF) and nuclear level densities (NLD) for deformed nuclei, and with experimental data from other reactions. Discussed scissors mode in odd-A Gd isotopes from summed reduced M1 strengths. Evidence of odd-even effect in strength of scissors mode.
doi: 10.1103/PhysRevC.88.034317
2013RU05 Phys.Rev. C 87, 054603 (2013) G.Rusev, M.Jandel, M.Krticka, T.A.Bredeweg, A.Couture, T.N.Taddeucci, J.L.Ullmann γ-ray cascade transitions in 112Cd and 114Cd following resonance capture of epithermal neutrons NUCLEAR REACTIONS 111,113Cd(n, γ), E=epithermal; measured E(n), I(n), TOF, Eγ, Iγ, γγ-coin, σ, multiplicity distribution using DANCE calorimeter at LANSCE facility. 112,114Cd; deduced levels, resonances, J, π, neutron, two-step γ cascades and radiative width of s-wave resonances, E1, M1 and E2 strength function. Comparison with statistical-model calculations using DICEBOX code, SLO and KMF models.
doi: 10.1103/PhysRevC.87.054603
2013RU14 Phys.Rev. C 88, 057602 (2013) G.Rusev, M.Jandel, M.Krticka, C.W.Arnold, T.A.Bredeweg, A.Couture, W.A.Moody, S.M.Mosby, J.L.Ullmann Cascade γ rays following capture of thermal neutrons on 113Cd NUCLEAR REACTIONS 113Cd(n, γ), E=0.178 eV; measured Eγ, Iγ, γγ-coin using DANCE array of BaF2 detectors at LANSCE-LANL facility; deduced multiplicity of γ cascades. DICEBOX analysis. GEANT4 simulations. Comparison with ENDF-6 evaluation.
doi: 10.1103/PhysRevC.88.057602
2013UL01 Phys.Rev. C 87, 044607 (2013) J.L.Ullmann, E.M.Bond, T.A.Bredeweg, A.Couture, R.C.Haight, M.Jandel, T.Kawano, H.Y.Lee, J.M.O'Donnell, A.C.Hayes, I.Stetcu, T.N.Taddeucci, P.Talou, D.J.Vieira, J.B.Wilhelmy, J.A.Becker, A.Chyzh, J.Gostic, R.Henderson, E.Kwan, C.Y.Wu Prompt γ-ray production in neutron-induced fission of 239Pu NUCLEAR REACTIONS 239Pu(n, F), E<30 keV; measured prompt Eγ, Iγ, fission σ(E), Gamma-ray multiplicity using DANCE γ-ray calorimeter at LANSCE facility; deduced average multiplicity, average total energy. GEANT4 simulation of DANCE detector. Fission Tagging. Comparison with Monte Carlo Hauser-Feshbach (MCHF) calculations, previous experimental studies, and with ENDF/B-VII.
doi: 10.1103/PhysRevC.87.044607
2012BA07 Phys.Rev. C 85, 024622 (2012) B.Baramsai, G.E.Mitchell, U.Agvaanluvsan, F.Becvar, T.A.Bredeweg, A.Chyzh, A.Couture, D.Dashdorj, R.C.Haight, M.Jandel, A.L.Keksis, M.Krticka, J.M.O'Donnell, R.S.Rundberg, J.L.Ullmann, D.J.Vieira, C.L.Walker Neutron resonance parameters in 155Gd measured with the DANCE γ-ray calorimeter array NUCLEAR REACTIONS 155Gd(n, γ), E=1.36-185 eV; measured neutron spectra by time-of-flight, E(n), I(n), Eγ, sum-energy spectra, average γ-ray multiplicity of s-wave resonances, cross sections using DANCE calorimeter at LANSC. 156Gd; deduced resonances, spins by various methods, resonance parameters, s-wave level density, normalized yields for J=1 and J=2 resonances, neutron and radiative width, Sammy fit of experimental cross sections. Comparison with previous studies, and ENDF/B-VII.0, JENDL-4.0, JEFF-3.1, ROSFOND-2010 libraries.
doi: 10.1103/PhysRevC.85.024622
2012CH07 Phys.Rev. C 85, 021601 (2012) A.Chyzh, C.Y.Wu, E.Kwan, R.A.Henderson, J.M.Gostic, T.A.Bredeweg, R.C.Haight, A.C.Hayes-Sterbenz, M.Jandel, J.M.O'Donnell, J.L.Ullmann Evidence for the stochastic aspect of prompt γ emission in spontaneous fission RADIOACTIVITY 252Cf(SF); measured prompt γ spectra, and γ-ray multiplicity distributions, total γ-ray energy distribution using 4π γ-ray calorimeter DANCE array at LANSCE facility. Data analyzed by iterative Bayesian and SVD methods. Stochastic features of the prompt γ emission in spontaneous fission at higher multiplicities.
doi: 10.1103/PhysRevC.85.021601
2012EN04 Nucl.Phys. A893, 87 (2012) J.W.Engle, S.G.Mashnik, H.Bach, A.Couture, K.Jackman, R.Gritzo, B.D.Ballard, M.Fassbender, D.M.Smith, L.J.Bitteker, J.L.Ullmann, M.S.Gulley, C.Pillai, K.D.John, E.R.Birnbaum, F.M.Nortier Cross sections from 800 MeV proton irradiation of terbium NUCLEAR REACTIONS 159Tb(p, X), E=795.4 MeV; measured thick target activation Eγ, Iγ(t); deduced 7Be, 54Mn, 60Co, 113Sn, 129Cs, 128,131,133Ba, 139,141Ce, 143,144,146Pm, 145,153Sm, 145,146,147,148,149,150,155,156Eu, 146,149,151,153Gd, 151,152,153,155,156m2,158Tb production σ; calculated fragments σ using CEOM03.03, Bertini INC+MPM (multistage preequilibrium model)+EVAP, INCL+ABLA codes.
doi: 10.1016/j.nuclphysa.2012.08.001
2012JA16 Phys.Rev.Lett. 109, 202506 (2012) M.Jandel, T.A.Bredeweg, E.M.Bond, M.B.Chadwick, A.Couture, J.M.O'Donnell, M.Fowler, R.C.Haight, T.Kawano, R.Reifarth, R.S.Rundberg, J.L.Ullmann, D.J.Vieira, J.M.Wouters, J.B.Wilhelmy, C.Y.Wu, J.A.Becker New Precision Measurements of the 235U(n, γ) Cross Section NUCLEAR REACTIONS 235U(n, γ), (n, F), E=0.000004-1 MeV; measured reaction products, Eγ, Iγ; deduced thick-target σ. Comparison with ENDF/B-VII, JENDL-4 evaluated libraries and available data.
doi: 10.1103/PhysRevLett.109.202506
2012KO14 Phys.Rev.Lett. 108, 142502 (2012) P.E.Koehler, R.Reifarth, J.L.Ullmann, T.A.Bredeweg, J.M.O'Donnell, R.S.Rundberg, D.J.Vieira, J.M.Wouters Abrupt Change in Radiation-Width Distribution for 147Sm Neutron Resonances NUCLEAR REACTIONS 147Sm(n, γ), E<1 keV; measured reaction products, Eγ, Iγ; deduced σ, total radiation width of s-wave resonances. R-matrix analysis.
doi: 10.1103/PhysRevLett.108.142502
2012KW01 Nucl.Instrum.Methods Phys.Res. A688, 55 (2012) E.Kwan, C.Y.Wu, R.C.Haight, H.Y.Lee, T.A.Bredeweg, A.Chyzh, M.Devlin, N.Fotiades, J.M.Gostic, R.A.Henderson, M.Jandel, A.Laptev, R.O.Nelson, J.M.O'Donnell, B.A.Perdue, T.N.Taddeucci, J.L.Ullmann, S.A.Wender Prompt energy distribution of 235U(n, f)γ at bombarding energies of 1-20 MeV NUCLEAR REACTIONS 235U(n, F), E=1-20 MeV; measured reaction products, Eγ, Iγ; deduced prompt γ-rays distribution. Comparison with GEANT4 simulations. RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ; deduced prompt γ-rays distribution. Comparison with GEANT4 simulations.
doi: 10.1016/j.nima.2012.06.003
2012WE09 Appl.Radiat.Isot. 70, 2590 (2012) J.W.Weidner, S.G.Mashnik, K.D.John, B.Ballard, E.R.Birnbaum, L.J.Bitteker, A.Couture, M.E.Fassbender, G.S.Goff, R.Gritzo, F.M.Hemez, W.Runde, J.L.Ullmann, L.E.Wolfsberg, F.M.Nortier 225Ac and 223Ra production via 800 MeV proton irradiation of natural thorium targets NUCLEAR REACTIONS Th(p, X)225Ac/227Ac/223Ra/225Ra/227Th, E=800 MeV; measured reaction products, Eγ, Iγ, Eα, Iα; deduced production rate s, yields, cumulative σ. Comparison with theoretical calculations.
doi: 10.1016/j.apradiso.2012.07.003
2012WE10 Appl.Radiat.Isot. 70, 2602 (2012) J.W.Weidner, S.G.Mashnik, K.D.John, F.Hemez, B.Ballard, H.Bach, E.R.Birnbaum, L.J.Bitteker, A.Couture, D.Dry, M.E.Fassbender, M.S.Gulley, K.R.Jackman, J.L.Ullmann, L.E.Wolfsberg, F.M.Nortier Proton-induced cross sections relevant to production of 225Ac and 223Ra in natural thorium targets below 200 MeV NUCLEAR REACTIONS Th(p, X)223Ra/225Ra/225Ac/227Th, E<200 MeV; measured reaction products, Eγ, Iγ; deduced cumulative σ, production rates, yields. Comparison with available data.
doi: 10.1016/j.apradiso.2012.07.006
2011BE58 Nucl.Instrum.Methods Phys.Res. A647, 73 (2011) F.Becvar, P.E.Koehler, M.Krticka, G.E.Mitchell, J.L.Ullmann Optimized γ-multiplicity-based spin assignments of s-wave neutron resonances NUCLEAR REACTIONS 147,149Sm(n, γ), E<600 eV; analyzed available data; deduced yields, neutron resonance parameters. Comparison with available data.
doi: 10.1016/j.nima.2011.04.026
2011CH31 Phys.Rev. C 84, 014306 (2011) A.Chyzh, B.Baramsai, J.A.Becker, F.Becvar, T.A.Bredeweg, A.Couture, D.Dashdorj, R.C.Haight, M.Jandel, J.Kroll, M.Krticka, G.E.Mitchell, J.M.O'Donnell, W.Parker, R.S.Rundberg, J.L.Ullmann, D.J.Vieira, C.L.Walker, J.B.Wilhelmy, J.M.Wouters, C.Y.Wu Measurement of the 157Gd(n, γ) reaction with the DANCE γ calorimeter array NUCLEAR REACTIONS 157Gd(n, γ), E=<300 eV; measured Eγ, Iγ using DANCE γ calorimeter. 158Gd; deduced E1, M1 and E1 photon strength distributions, resonances, multiplicity, spin distribution, multistep cascade (MSC) spectra. Statistical model calculations using DICEBOX code. Scissors mode.
doi: 10.1103/PhysRevC.84.014306
2011UL01 J.Korean Phys.Soc. 59, 1406s (2011) J.L.Ullmann, A.J.Couture, A.L.Keksis, D.J.Vieira, J.M.O'Donnell, J.M.Wouters, M.Jandel, R.C.Haight, R.S.Rundberg, T.A.Bredeweg, T.Kawano, C.Y.Wu, J.A.Becker, A.Chyzh, B.Baramsai, G.E.Mitchell, M.Krticka Measurement of the 238U Neutron-capture Cross Section and Gamma-emission Spectra from 10 eV to 100 keV Using the DANCE Detector at LANSCE NUCLEAR REACTIONS 238U(n, γ), E=10 eV-100 keV; measured Eγ, Iγ, γγ-coin using DANCE at LANSCE; deduced σ, γ multiplicity, 36 eV resonance σ(Eγ); calculated γ multiplicity, σ(Eγ) using DICEBOX code.
doi: 10.3938/jkps.59.1406
2009SH05 Phys.Rev. C 79, 024301 (2009) S.A.Sheets, U.Agvaanluvsan, J.A.Becker, F.Becvar, T.A.Bredeweg, R.C.Haight, M.Jandel, M.Krticka, G.E.Mitchell, J.M.O'Donnell, W.Parker, R.Reifarth, R.S.Rundberg, E.I.Sharapov, J.L.Ullmann, D.J.Vieira, J.B.Wilhelmy, J.M.Wouters, C.Y.Wu Test of the statistical model in 96Mo with the BaF2γ calorimeter DANCE array NUCLEAR REACTIONS 95Mo(n, γ), E<2 keV; measured Eγ, Iγ, from multi-step γ cascades for s- and p-wave neutron resonances below 2 keV. Compared γ spectral shapes to DICEBOX statistical model simulations. Compared multi-step γ-cascade spectra for different multiplicities from various resonances with predictions of different photon strength function models.
doi: 10.1103/PhysRevC.79.024301
2008AL03 Phys.Rev. C 77, 015806 (2008) A.M.Alpizar-Vicente, T.A.Bredeweg, E.-I.Esch, U.Greife, R.C.Haight, R.Hatarik, J.M.O'Donnell, R.Reifarth, R.S.Rundberg, J.L.Ullmann, D.J.Vieira, J.M.Wouters Neutron capture cross section of 62Ni at s-process energies NUCLEAR REACTIONS 62Ni(n, γ), E=35 eV-500 keV; measured neutron capture cross sections, Eγ.
doi: 10.1103/PhysRevC.77.015806
2008ES01 Phys.Rev. C 77, 034309 (2008) E.-I.Esch, R.Reifarth, E.M.Bond, T.A.Bredeweg, A.Couture, S.E.Glover, U.Greife, R.C.Haight, A.M.Hatarik, R.Hatarik, M.Jandel, T.Kawano, A.Mertz, J.M.O'Donnell, R.S.Rundberg, J.M.Schwantes, J.L.Ullmann, D.J.Vieira, J.B.Wilhelmy, J.M.Wouters Measurement of the 237Np(n, γ) cross section from 20 meV to 500 keV with a high efficiency, highly segmented 4π BaF2 detector NUCLEAR REACTIONS 237Np(n, γ), E=0.02-500 keV; measured σ, neutron flux, Eγ, Iγ, time-of-flight spectra, α-spectra. DANCE array. Comparisons with Hauser-Feshbach-Moldauer calculations.
doi: 10.1103/PhysRevC.77.034309
2008JA08 Phys.Rev. C 78, 034609 (2008); Publishers Note Phys.Rev. C 78, 049904 (2008) M.Jandel, T.A.Bredeweg, E.M.Bond, M.B.Chadwick, R.R.Clement, A.Couture, J.M.O'Donnell, R.C.Haight, T.Kawano, R.Reifarth, R.S.Rundberg, J.L.Ullmann, D.J.Vieira, J.B.Wilhelmy, J.M.Wouters, U.Agvaanluvsan, W.E.Parker, C.Y.Wu, J.A.Becker Neutron capture cross section of 241Am NUCLEAR REACTIONS 241Am(n, γ), E=0.02 eV-320 keV; measured Eγ, Iγ, σ, resonance parameters. Comparison with evaluated cross sections databases.
doi: 10.1103/PhysRevC.78.034609
2007AG09 Nucl.Instrum.Methods Phys.Res. B261, 934 (2007) U.Agvaanluvsan, J.A.Becker, R.A.Macri, W.Parker, P.Wilk, C.Y.Wu, T.A.Bredeweg, E.Esch, R.C.Haight, J.M.O'Donnell, R.Reifarth, R.S.Rundberg, J.M.Schwantes, J.L.Ullmann, D.J.Vieira, J.B.Wilhelmy, J.M.Wouters, G.E.Mitchell, S.Sheets, F.Becvar, M.Krticka Progress on the europium neutron capture study using DANCE NUCLEAR REACTIONS 151,153Eu(n, γ), E=0.1-100 keV; measured Eγ, Iγ, and multiplicity distributions.
doi: 10.1016/j.nimb.2007.03.107
2007BR16 Nucl.Instrum.Methods Phys.Res. B261, 986 (2007) T.A.Bredeweg, M.M.Fowler, J.A.Becker, E.M.Bond, M.B.Chadwick, R.R.C.Clement, E.-I.Esch, T.Ethvignot, T.Granier, M.Jandel, R.A.Macri, J.M.O'Donnell, R.Reifarth, R.S.Rundberg, J.L.Ullmann, D.J.Vieira, J.B.Wilhelmy, J.M.Wouters, C.Y.Wu Simultaneous measurement of (n, γ) and (n, fission) cross sections with the DANCE 4π BaF2 array NUCLEAR REACTIONS 235U, 252Cf(n, γ), (n, X), E < 18 eV; measured Eγ, Iγ, fission fragments. Deduced cross sections.
doi: 10.1016/j.nimb.2007.04.226
2007KO54 Phys.Rev. C 76, 025804 (2007) P.E.Koehler, J.L.Ullmann, T.A.Bredeweg, J.M.O'Donnell, R.Reifarth, R.S.Rundberg, D.J.Vieira, J.M.Wouters Spin measurements for 147Sm + n resonances: Further evidence for nonstatistical effects NUCLEAR REACTIONS 147Sm(n, γ), E=spectrum; measured Eγ, Iγ, multiplicities. 147Sm deduced resonance energies and spins.
doi: 10.1103/PhysRevC.76.025804
2007SH46 Phys.Rev. C 76, 064317 (2007) S.A.Sheets, U.Agvaanluvsan, J.A.Becker, F.Becvar, T.A.Bredeweg, R.C.Haight, M.Krticka, M.Jandel, G.E.Mitchell, J.M.O'Donnell, W.E.Parker, R.Reifarth, R.S.Rundberg, E.I.Sharapov, I.Tomandl, J.L.Ullmann, D.J.Vieira, J.M.Wouters, J.B.Wilhelmy, C.Y.Wu Spin and parity assignments for 94, 95Mo neutron resonances NUCLEAR REACTIONS 94,95Mo(n, γ), E=800 MeV; measured neutron energies, Eγ, Iγ, γ-ray multiplicities. 95,96Mo; deduced neutron resonance levels, J, π.
doi: 10.1103/PhysRevC.76.064317
2007SO06 Phys.Rev. C 75, 034611 (2007) D.S.Sorenson, J.L.Ullmann, A.Ling, B.K.Park, R.C.Haight, N.S.P.King, R.A.Lindgren, H.Baghaei, E.J.Stephenson, F.P.Brady, J.L.Romero, J.Rapaport, B.L.Clausen, C.Wuest, F.Sammarruca Limitations of the distorted-wave impulse approximation in describing the energy dependence of the 10B(n, p)10Be(g.s.) reaction NUCLEAR REACTIONS 10B(n, p), E=70240 MeV; measured σ(E, θ). Comparison with zero- and finite-range DWIA predictions.
doi: 10.1103/PhysRevC.75.034611
2005RE25 Nucl.Instrum.Methods Phys.Res. B241, 176 (2005) R.Reifarth, E.-I.Esch, A.Alpizar-Vicente, E.M.Bond, T.A.Bredeweg, S.E.Glover, U.Greife, R.Hatarik, R.C.Haight, A.Kronenberg, J.M.O'Donnell, R.S.Rundberg, J.M.Schwantes, J.L.Ullmann, D.J.Vieira, J.B.Wilhelmy, J.M.Wouters (n, γ) measurements on radioactive isotopes with DANCE NUCLEAR REACTIONS 237Np(n, γ), E=0.01-10 eV; measured σ. Comparison with previous results.
doi: 10.1016/j.nimb.2005.07.022
2004OS02 Phys.Rev. C 70, 054613 (2004) J.H.Osborne, F.P.Brady, J.L.Romero, J.L.Ullmann, D.S.Sorenson, A.Ling, N.S.P.King, R.C.Haight, J.Rapaport, R.W.Finlay, E.Bauge, J.P.Delaroche, A.J.Koning Measurement of neutron elastic scattering cross sections for 12C, 40Ca, and 208Pb at energies from 65 to 225 MeV NUCLEAR REACTIONS 12C, 40Ca, 208Pb(n, n), E=65-225 MeV; measured σ(θ). Comparison with model predictions, previous results.
doi: 10.1103/PhysRevC.70.054613
2003RE27 Nucl.Phys. A718, 478c (2003) R.Reifarth, R.Haight, M.Heil, M.M.Fowler, K.Kappeler, G.G.Miller, R.S.Rundberg, J.L.Ullmann, J.B.Wilhelmy Neutron capture measurements on 171Tm NUCLEAR REACTIONS 171Tm(n, γ), E < 20 MeV; measured σ. Comparison with model prediction.
doi: 10.1016/S0375-9474(03)00862-5
1994OS07 Nucl.Instrum.Methods Phys.Res. A345, 308 (1994) J.H.Osborne, J.L.Romero, F.P.Brady, E.L.Hjort, W.P.Caskey, J.C.Kintner, D.R.Mayo, D.S.Sorenson, J.L.Ullmann A Compact System with Live Converter for Neutron Spectrum Measurements NUCLEAR REACTIONS 12C(n, n), E=65 MeV; measured σ(θ). Si(n, n), (n, n'), E=65 MeV; measured neutron spectra. Compact detector system with live plastic scintillator converter.
doi: 10.1016/0168-9002(94)91007-3
1993PA18 Phys.Rev. C48, 711 (1993) B.K.Park, J.Rapaport, G.Fink, J.L.Ullmann, A.G.Ling, D.S.Sorenson, F.P.Brady, J.L.Romero, C.R.Howell, W.Tornow, W.Unkelbach Energy Dependence of Multipole Strength Distributions in the 32S(n, p)32P Reaction NUCLEAR REACTIONS 32S(n, p), E=60-220 MeV; measured σ(θ, Ep), σ(θ); deduced Gamow-Teller transition strengths. Shell model, RPA comparison.
doi: 10.1103/PhysRevC.48.711
1993ST06 Phys.Rev. C47, 1647 (1993) S.Stamer, W.Scobel, W.B.Amian, R.C.Byrd, R.C.Haight, J.L.Ullmann, R.W.Bauer, M.Blann, B.A.Pohl, J.Bisplinghoff, R.Bonetti Double Differential Cross Sections for Neutron Emission Induced by 256 MeV and 800 MeV Protons NUCLEAR REACTIONS 7Li, 27Al, Zr, Pb(p, xn), E=256, 800 MeV; measured σ(θ, E); deduced reaction mechanism. Intranuclear cascade, statistical multi-step, hybrid models.
doi: 10.1103/PhysRevC.47.1647
1993YA11 Phys.Rev. C48, 1158 (1993) X.Yang, L.Wang, J.Rapaport, C.D.Goodman, C.Foster, Y.Wang, W.Unkelbach, E.Sugarbaker, D.Marchlenski, S.de Lucia, B.Luther, J.L.Ullmann, A.G.Ling, B.K.Park, D.S.Sorenson, L.Rybarcyk, T.N.Taddeucci, C.R.Howell, W.Tornow Dipole and Spin-Dipole Resonances in Charge-Exchange Reactions on 12C NUCLEAR REACTIONS 12C(n, p), E=60-260 MeV; measured σ(θ, Ep); 12C(p, n), E=186 MeV; 12C(polarized p, n), E=160 MeV; measured σ(θ, En), polarization, spin observables, analyzing power; deduced dipole, spin-dipole resonances.
doi: 10.1103/PhysRevC.48.1158
1992PA06 Phys.Rev. C45, 1791 (1992) B.K.Park, J.Rapaport, J.L.Ullmann, A.G.Ling, D.S.Sorenson, F.P.Brady, J.L.Romero, C.R.Howell, W.Tornow, T.C.Ronnqvist Gamow-Teller and Dipole Strength Distribution in 40Ca(n, p)40K Reaction NUCLEAR REACTIONS 40Ca(n, p), E=60-260 MeV; measured σ(E, θ). 40K deduced Gamow-Teller strength, dipole, spin-dipole transition strength. DWIA analysis, compared with 1p-1h shell model predictions.
doi: 10.1103/PhysRevC.45.1791
1992SO02 Phys.Rev. C45, R500 (1992) D.S.Sorenson, X.Aslanoglou, F.P.Brady, J.R.Drummond, R.C.Haight, C.R.Howell, N.S.P.King, A.Ling, P.W.Lisowski, B.K.Park, J.Rapaport, J.L.Romero, W.Tornow, J.L.Ullmann Energy Dependence of the Gamow-Teller Strength in p-Shell Nuclei Observed in the (n, p) Reaction NUCLEAR REACTIONS 6Li, 13,12C(n, p), E=60-260 MeV; measured σ(θ, E); deduced unit σ, effective interaction volume integrals.
doi: 10.1103/PhysRevC.45.R500
1991LI36 Phys.Rev. C44, 2794 (1991) A.Ling, X.Aslanoglou, F.P.Brady, R.W.Finlay, R.C.Haight, C.R.Howell, N.S.P.King, P.W.Lisowski, B.K.Park, J.Rapaport, J.L.Romero, D.S.Sorenson, W.Tornow, J.L.Ullmann Ground-State Gamow-Teller Strength in 64Ni(n, p)64Co Cross Sections at 90-240 MeV NUCLEAR REACTIONS 64Ni(n, p), E=90-240 MeV; measured σ(E, θ); deduced unit σ. DWIA analysis.
doi: 10.1103/PhysRevC.44.2794
1991SA18 Nucl.Phys. A530, 387 (1991) A.L.Sagle, B.E.Bonner, F.P.Brady, N.S.P.King, M.W.McNaughton, J.L.Romero, J.L.Ullmann 3H + d → n(pol) + 4He n(pol) + 4He → 3H + d Measurements and Absolute Neutron-Polarization Determination at 50 MeV NUCLEAR REACTIONS 3H(d, n), E=20-50 MeV; measured absolute neutron polarization. Inverse reaction as analyzer. 4He(polarized n, d), E=50 MeV; measured σ(θ), analyzing power.
doi: 10.1016/0375-9474(91)90809-K
1990ME04 Nucl.Sci.Eng. 104, 339 (1990) M.M.Meier, C.A.Goulding, G.L.Morgan, J.L.Ullmann Neutron Yields from Stopping- and Near-Stopping-Length Targets for 256-MeV Protons NUCLEAR REACTIONS, MECPD C, 27Al, Fe, U(p, xn), E=256 MeV; measured absolute neutron yields. Model calculations.
doi: 10.13182/NSE90-A23733
1989RA09 Phys.Rev. C39, 1929 (1989) J.Rapaport, P.W.Lisowski, J.L.Ullmann, R.C.Byrd, T.A.Carey, J.B.McClelland, L.J.Rybarcyk, T.N.Taddeucci, R.C.Haight, N.S.P.King, G.L.Morgan, D.A.Clark, D.E.Ciskowski, D.A.Lind, R.Smythe, C.D.Zafiratos, D.Prout, E.R.Sugarbaker, D.Marchlenski, W.P.Alford, W.G.Love Fermi and Gamow-Teller Strength in p-Shell Nuclei from (p, n) Reactions at 492 and 590 MeV NUCLEAR REACTIONS 7Li, 11B, 12,13,14C(p, n), E=492 MeV; 13C, 11B(p, n), E=590 MeV; measured σ(θ, E); deduced unit σ(ratio).
doi: 10.1103/PhysRevC.39.1929
1988MI02 Phys.Rev. C37, 710 (1988) J.H.Mitchell, J.T.Brack, R.J.Peterson, R.A.Ristinen, J.L.Ullmann, R.L.Boudrie, B.G.Ritchie, J.Escalante Inelastic Pion Scattering from 13C at 65 MeV NUCLEAR REACTIONS 13C(π+, π+), (π+, π+'), (π-, π-), (π-, π-'), E=65 MeV; measured σ(θ). 13C levels deduced deformation lengths, σ(π-)/σ(π+) enhancement features; deduced deformation length. Comparison with DWIA calculations with rho-squared medium corrections.
doi: 10.1103/PhysRevC.37.710
1988RO03 Phys.Lett. 202B, 35 (1988) S.H.Rokni, H.W.Baer, A.G.Bergmann, J.D.Bowman, F.Irom, M.J.Leitch, C.J.Seftor, J.Alster, E.Piasetzky, B.L.Clausen, R.A.Loveman, R.J.Peterson, J.L.Ullmann, J.R.Comfort, J.N.Knudson, U.Sennhauser Isobaric-Analog-State Transitions in Pion Charge-Exchange Reactions above the Δ(1232) Resonance NUCLEAR REACTIONS 14C, 7Li(π+, π0), E=300-550 MeV; 27Al, 60Ni(π+, π0), E=300, 425, 500 MeV; 90Zr, 120Sn, 208Pb(π+, π0), E=300, 425 MeV; measured σ(θ), σ(θ, E); deduced IAS excitation incident energy dependence.
doi: 10.1016/0370-2693(88)90849-0
1987CL02 Phys.Rev. C35, 1028 (1987) B.L.Clausen, R.A.Loveman, R.J.Peterson, R.A.Ristinen, J.L.Ullmann, F.Irom Delta Production by Pion Charge Exchange on Complex Nuclei NUCLEAR REACTIONS 1,2H, C, 90Zr(π-, π0), E=475 MeV; measured σ(E(π0)); deduced delta production σ.
doi: 10.1103/PhysRevC.35.1028
1987UL01 Phys.Rev. C35, 1099 (1987) J.L.Ullmann, P.W.F.Alons, B.L.Clausen, J.J.Kraushaar, J.H.Mitchell, R.J.Peterson, R.A.Ristinen, R.L.Boudrie, N.S.P.King, C.L.Morris, J.N.Knudson, E.F.Gibson Pion Scattering to Collective Excitations in 90Zr and 118Sn NUCLEAR REACTIONS 118Sn, 90Zr(π+, π+'), (π-, π-'), E=163 MeV; measured σ(θ). 118Sn, 90Zr levels deduced deformation lengths, GQR, giant monopole sum rule strengths, σ ratios.
doi: 10.1103/PhysRevC.35.1099
1986BR29 Phys.Rev. C34, 1771 (1986) J.T.Brack, J.J.Kraushaar, J.H.Mitchell, R.J.Peterson, R.A.Ristinen, J.L.Ullmann, D.R.Gill, R.R.Johnson, D.Ottewell, F.M.Rozon, M.E.Sevior, G.R.Smith, F.Tervisidis, R.P.Trelle, E.L.Mathie πp Elastic Scattering from 67 to 139 MeV NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), E=66.8-138.8 MeV; measured σ(θ).
doi: 10.1103/PhysRevC.34.1771
1986KI12 Phys.Lett. 175B, 279 (1986) N.S.P.King, P.W.Lisowski, G.L.Morgan, P.N.Craig, R.G.Jeppesen, D.A.Lind, J.R.Shepard, J.L.Ullmann, C.D.Zafiratos, C.D.Goodman, C.A.Goulding Observation of Fermi and Gamow-Teller Strength in the 800 MeV (p, n) Reaction NUCLEAR REACTIONS 6Li, 12,13C, 15N(p, n), E=800 MeV; measured σ(θ), σ(θ) vs neutron momentum. 12,13N, 15O, 6Be deduced Gamow-Teller, Fermi transition strengths.
doi: 10.1016/0370-2693(86)90856-7
1986SU15 Phys.Rev. C34, 1580 (1986) T.S.Subramanian, J.L.Romero, F.P.Brady, D.H.Fitzgerald, R.Garrett, G.A.Needham, J.L.Ullmann, J.W.Watson, C.I.Zanelli, D.J.Brenner, R.E.Prael Double-Differential Inclusive Hydrogen and Helium Spectra from Neutron-Induced Reactions at 27.4, 39.7, and 60.7 MeV; Oxygen and nitrogen NUCLEAR REACTIONS 14N, 16O(n, pX), (n, dX), (n, tX), (n, 3HeX), (n, αX), E=27.4, 39.7, 60.7 MeV; measured σ(E, θ), ΔE-E detector telescopes. Intranuclear cascade plus deexcitation calculations.
doi: 10.1103/PhysRevC.34.1580
1986UL01 Phys.Rev. C33, 2092 (1986) J.L.Ullmann, P.W.F.Alons, J.J.Kraushaar, J.H.Mitchell, R.J.Peterson, R.A.Ristinen, J.N.Knudson, J.R.Comfort, H.W.Baer, J.D.Bowman, M.D.Cooper, D.H.Fitzgerald, F.Irom, M.J.Leitch, E.Piasetzky Pion Single Charge Exchange on 14C from 35 to 295 MeV NUCLEAR REACTIONS 14C(π+, π0), E=35-295 MeV; measured σ(θ), σ(E(π)); deduced parameters. 14N deduced IAS excitation σ. Comparison with models.
doi: 10.1103/PhysRevC.33.2092
1985HI03 Phys.Rev. C31, 1323 (1985) K.H.Hicks, R.G.Jeppesen, J.J.Kraushaar, P.D.Kunz, R.J.Peterson, R.S.Raymond, R.A.Ristinen, J.L.Ullmann, F.D.Becchetti, J.N.Bradbury, M.Paciotti Fission of Heavy Nuclei Induced by Energetic Pions NUCLEAR REACTIONS 238U, 209Bi, 197Au(π+, F), (π-, F), E=60-100 MeV; measured fission fragment spectra, mass distribution, σ(fragment θ), (fragment)(fragment)(θ); deduced fission mechanism, σ vs fissility parameter.
doi: 10.1103/PhysRevC.31.1323
1985PE03 Nucl.Phys. A435, 717 (1985) The Influence of Unbound States for Inelastic Excitations of Giant Quadrupole Resonances NUCLEAR REACTIONS 40Ca, 90Zr, 118Sn, 208Pb(π+, π+), (π+, π+'), (π-, π-'), (π-, π-), E=80-300 MeV; calculated σ ratio, unbound transition densities. 118Sn(α, α'), E=129 MeV; calculated σ(θ).
doi: 10.1016/0375-9474(85)90184-8
1985UL01 Phys.Rev. C31, 177 (1985) J.L.Ullmann, J.J.Kraushaar, T.G.Masterson, R.J.Peterson, R.S.Raymond, R.A.Ristinen, N.S.P.King, R.L.Boudrie, C.L.Morris, R.E.Anderson, E.R.Siciliano Pion Inelastic Scattering to Giant Resonances and Low-Lying Collective States in 118Sn and 40Ca NUCLEAR REACTIONS 40Ca, 118Sn(π+, π+), (π+, π+'), (π-, π-), (π-, π-'), E=135 MeV; measured σ(E(π)), σ(θ). 40Ca, 118Sn deduced giant quadrupole, monopole, low-energy octupole resonance strengths, deformation lengths, sum rule fraction. Isoscalar models.
doi: 10.1103/PhysRevC.31.177
1984BR03 J.Phys.(London) G10, 363 (1984) F.P.Brady, G.A.Needham, J.L.Ullmann, C.M.Castaneda, T.D.Ford, N.S.P.King, J.L.Romero, M.L.Webb, V.R.Brown, C.H.Poppe Excitation of Analogue Isovector Resonances via the (n, p) Reaction at 60 MeV NUCLEAR REACTIONS 6,7Li, 12C, 16O, 28Si, 58,60,62,64Ni, 209Bi(n, p), E=60 MeV; measured σ(θ); deduced effective nucleon-nucleon interaction isovector spin-dependent component, analog isovector resonance excitation mechanism. 28Al deduced Gamow-Teller type transition. 7He deduced L=1 dipole strength contribution. 6He, 12B deduced L=1 strength spin character, Gamow-Teller type transition. 16N deduced L=1 strength spin character.
doi: 10.1088/0305-4616/10/3/011
1984MA54 Phys.Rev. C30, 2010 (1984) T.G.Masterson, J.J.Kraushaar, R.J.Peterson, R.S.Raymond, R.A.Ristinen, J.L.Ullmann, R.L.Boudrie, D.R.Gill, E.F.Gibson, A.W.Thomas Charge Symmetry in Pion-Deuteron Elastic Scattering NUCLEAR REACTIONS 2H(π+, π+), (π-, π-), E=256 MeV; measured σ(θ); deduced isobar resonance component parameters. Magnetic spectrograph. Three body analysis, external and internal Coulomb corrections.
doi: 10.1103/PhysRevC.30.2010
1984UL01 Nucl.Phys. A427, 493 (1984) J.L.Ullmann, F.P.Brady, C.M.Castaneda, D.H.Fitzgerald, G.A.Needham, J.L.Romero, N.S.P.King Analog Giant Dipole Ni(n, p) at 59.6 MeV NUCLEAR REACTIONS 58,60,62,64Ni(n, p), E=59.6 MeV; measured σ(θ). 58,60,62,64Co deduced GDR analog, sum rule, blocking. Enriched targets.
doi: 10.1016/0375-9474(84)90227-6
1983BE34 Phys.Rev. C28, 1217 (1983) F.D.Becchetti, K.H.Hicks, C.A.Fields, R.J.Peterson, R.S.Raymond, R.A.Ristinen, J.L.Ullmann, C.S.Zaidins 3He-Induced Fission of Nuclei 159 < A < 232 NUCLEAR REACTIONS 159Tb, 165Ho, 169Tm, Ta, Re, 194,195Pt, 197Au, 202Hg, 205Tl, 206,208Pb, Bi, Th(3He, F), E=19.1-44.5 MeV; measured fission(fragment)(fragment)-coin, σ(fragment θ, E), (fragment)(fragment)(θ); deduced fission σ(E), parameters, total kinetic energy release, relative mass division. Statistical model.
doi: 10.1103/PhysRevC.28.1217
1983BR32 Phys.Rev.Lett. 51, 1320 (1983) F.Brady, G.A.Needham, J.L.Romero, C.M.Castaneda, T.D.Ford, J.L.Ullmann, M.L.Webb New Giant Dipole Strength in 6Li and 7Li as Revealed via (n, p) at 60 MeV
doi: 10.1103/PhysRevLett.51.1320
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