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NSR database version of April 11, 2024.

Search: Author = J.L.Ullmann

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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
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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
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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
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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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14796.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14791.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14682.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14410. Data from this article have been entered in the XUNDL database. For more information, click here.


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
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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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14794.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14481. Data from this article have been entered in the XUNDL database. For more information, click here.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14471.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14471.


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
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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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14467.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14460.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14456.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14455.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2200.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14244. Data from this article have been entered in the XUNDL database. For more information, click here.


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
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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
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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
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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
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Data from this article have been entered in the XUNDL database. For more information, click here.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14361.


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
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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
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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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14383.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14410.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14310.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14310.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14361.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14364.


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
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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
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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
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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
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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
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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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14318. Data from this article have been entered in the XUNDL database. For more information, click here.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14315.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1951.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14149.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14334.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14413.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1949.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1950.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14306.


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
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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
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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 BaF 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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14164.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14032.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14209.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14149.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14306. Data from this article have been entered in the XUNDL database. For more information, click here.


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
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Data from this article have been entered in the XUNDL database. For more information, click here.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14139.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14032.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset22841.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13530.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14204.


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
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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
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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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14031.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0824.


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
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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
Citations: PlumX Metrics


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
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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
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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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset10824.


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
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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
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1985PE03      Nucl.Phys. A435, 717 (1985)

R.J.Peterson, J.L.Ullmann

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
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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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset12784.


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
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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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset12846.


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2442.


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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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset12845.


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