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NSR database version of April 11, 2024.

Search: Author = K.J.Kelly

Found 23 matches.

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2023GI01      Phys.Rev. C 107, 014612 (2023)

N.P.Giha, S.Marin, J.A.Baker, I.E.Hernandez, K.J.Kelly, M.Devlin, J.M.O'Donnell, R.Vogt, J.Randrup, P.Talou, I.Stetcu, A.E.Lovell, O.Litaize, O.Serot, A.Chebboubi, C.-Y.Wu, S.D.Clarke, S.A.Pozzi

Correlations between energy and γ-ray emission in 239Pu(n, f)

NUCLEAR REACTIONS 239Pu(n, f), E=2-40 MeV; measured fragments, En, In, Eγ, Iγ, (fragments)γ-coin, (fragment)n-coin, nγ-coin; deduced γ spectrum, γ multiplicity, linear relation between incident neutron energy and γ multiplicity. Comparison to fission model calculations done with CGMF, FIFRELIN and FREYA codes. Multiplicity results are compared to ENDF/B-VIII.0 data and to experimental data on 238U(n, F), 239Pu(d, F), 233Pu(d, F), 240Pu(d, F) reactions. Broad-spectrum neutron beam produced via spallation reaction of an 800 MeV proton beam on W target (Los Alamos Neutron Science Center). Chi-Nu liquid scintillator array, a hemispherical array of 54 EJ-309 (n- and γ- measurement) surrounding multifoil parallel-plate avalanche counter (PPAC) serving as target and contain ing 239Pu (fragment measurement).

doi: 10.1103/PhysRevC.107.014612
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2023KE08      Phys.Rev. C 108, 014603 (2023)

K.J.Kelly, M.Devlin, J.M.O'Donnell, E.A.Bennett, M.Paris, P.A.Copp

Measurement of the cross section of the Q = 4.4398 MeV 12C(n, n'γ) reaction from threshold to 16.5 MeV using γ and correlated n-γ detection

NUCLEAR REACTIONS 12C(n, n'γ), E=4.5-16.5 MeV; measured Eγ, Iγ, En, Iν, nγ-coin; deduced σ(E). Comparison to other experimental data and evaluated values from ENDF/B-VIII.0. Correlated Gamma-Neutron Array for Scattering (CoGNAC) consisting of 54-element EJ-309 liquid scintillator array at Weapons Neutron Research (WNR) facility (LANSCE, LANL).

doi: 10.1103/PhysRevC.108.014603
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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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2023NE10      Eur.Phys.J. N 9, 35 (2023)

D.Neudecker, A.M.Lewis, E.F.Matthews, J.Vanhoy, R.C.Haight, D.L.Smith, P.Talou, S.Croft, A.D.Carlson, B.Pierson, A.Wallner, A.Al-Adili, L.Bernstein, R.Capote, M.Devlin, M.Drosg, D.L.Duke, S.Finch, M.W.Herman, K.J.Kelly, A.Koning, A.E.Lovell, P.Marini, K.Montoya, G.P.A.Nobre, M.Paris, B.Pritychenko, H.Sjostrand, L.Snyder, V.Sobes, A.Solders, J.Taieb

Templates of Expected Measurement Uncertainties: a CSEWG Effort

NUCLEAR REACTIONS 235U(n, F), E<20 MeV; analyzed available data; deduced nubar mean values and uncertainties.

doi: 10.1051/epjn/2023014
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2023NE11      Eur.Phys.J. N 9, 32 (2023)

D.Neudecker, M.Devlin, R.C.Haight, K.J.Kelly, P.Marini, A.D.Carlson, J.Taieb, M.C.White

Templates of expected measurement uncertainties for prompt fission neutron spectra

RADIOACTIVITY 252Cf(SF); analyzed available data; deduced prompt-fission neutron spectrum (PFNS), ratio to a Maxwellian function.

NUCLEAR REACTIONS 239Pu(n, F), E<20 MeV; analyzed available data; deduced prompt-fission neutron spectrum (PFNS), ratio to a Maxwellian function.

doi: 10.1051/epjn/2023013
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2023NE12      Eur.Phys.J. N 9, 30 (2023)

D.Neudecker, A.D.Carlson, S.Croft, M.Devlin, K.J.Kelly, A.E.Lovell, P.Marini, J.Taieb

Templates of expected measurement uncertainties for average prompt and total fission neutron multiplicities

RADIOACTIVITY 252Cf(SF); analyzed available data; deduced prompt-fission neutron spectrum (PFNS), nubar uncertainties.

NUCLEAR REACTIONS 239Pu(n, F), E<20 MeV; analyzed available data; deduced prompt-fission neutron spectrum (PFNS), nubar uncertainties.

doi: 10.1051/epjn/2023016
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2023VA11      Eur.Phys.J. N 9, 31 (2023)

J.R.Vanhoy, R.C.Haight, S.F.Hicks, M.Devlin, D.Neudecker, M.Herman, A.Koning, K.J.Kelly, I.Thompson

Templates of expected measurement uncertainties for (n, xn) cross sections

NUCLEAR REACTIONS 56Fe, 23Na(n, n'), 9Be(n, X), E=3.5, 6 MeV; analyzed available data; deduced a template for evaluating experimental uncertainties for neutron elastic and inelastic scattering σ and γ-ray production σ from (n, xn) measurements at laboratories with monoenergetic or white neutron sources.

doi: 10.1051/epjn/2023019
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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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2022MA58      Phys.Lett. B 835, 137513 (2022)

P.Marini, J.Taieb, D.Neudecker, G.Belier, A.Chatillon, D.Etasse, B.Laurent, P.Morfouace, B.Morillon, M.Devlin, J.A.Gomez, R.C.Haight, K.J.Kelly, J.M.O'Donnell

Energy dependence of prompt fissions neutron multiplicity in the 239Pu(n, f) reaction

NUCLEAR REACTIONS 239Pu(n, F), E=1-700 MeV; calculated neutron multiplicity, nubar. Comparison with available data, ENDF/B-VIII.0 and JEFF3.3 libraries.

doi: 10.1016/j.physletb.2022.137513
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2022MO02      Ann.Nucl.Energy 165, 108647 (2022)

K.S.Mohindroo, Y.Danon, E.Blain, M.Devlin, K.J.Kelly

Quasi-differential neutron induced neutron emissions from 235U, and 239Pu

NUCLEAR REACTIONS C, 235U, 239Pu(N, X)1NN, E=0.82-20 MeV; measured reaction products, En, In; deduced neutron emission spectrum. Comparison with ENDF/B-VIII.0, JEFF-3.3, and JENDL-4.0 evaluated libraries. The Los Alamos Neutron Science Center.

doi: 10.1016/j.anucene.2021.108647
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2021KE05      Nucl.Data Sheets 173, 42 (2021)

K.J.Kelly, P.Marini, J.Taieb, M.Devlin, D.Neudecker, R.C.Haight, G.Belier, B.Laurent, P.Morfouace, J.M.O'Donnell, E.Bauge, M.B.Chadwick, A.Chatillon, D.Etasse, P.Talou, M.C.White, C.Y.Wu, E.A.Bennett

Comparison of Results from Recent NNSA and CEA Measurements of the 239Pu(n, f) Prompt Fission Neutron Spectrum

NUCLEAR REACTIONS 239Pu(n, F), E<20 MeV; analyzed the NNSA and CEA data; deduced prompt fission neutron spectrum (PFNS), systematic differences.

doi: 10.1016/j.nds.2021.04.003
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2021KE11      Phys.Rev. C 104, 064614 (2021)

K.J.Kelly, M.Devlin, J.M.O'Donnell, E.A.Bennett

Correlated n-γ angular distributions from the Q=4.4398 MeV 12C(n, n'γ) reaction for incident neutron energies from 6.5 MeV to 16.5 MeV

NUCLEAR REACTIONS 12C(n, n'γ), E=6.5-16.5 MeV; measured reaction products, neutron and γ spectra using array of fifty-four detector EJ-309 liquid scintillator detectors, and pulse shape discrimination (PSD) techniques, n(θ)γ(θ) at the Los Alamos Neutron Science Center (LANSCE). Comparison with available previous experimental data, and with nuclear data evaluated libraries. Discussed potential large systematic uncertainties.

doi: 10.1103/PhysRevC.104.064614
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14726.


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.


2020LO08      Phys.Rev. C 102, 024621 (2020)

A.E.Lovell, P.Talou, I.Stetcu, K.J.Kelly

Correlations between fission fragment and neutron anisotropies in neutron-induced fission

NUCLEAR REACTIONS 235,238U, 239Pu(n, F), E=0-20 MeV; calculated anisotropic angular distributions for fission-fragments, prompt neutrons only from fission, and all prompt neutrons as a function of incident energy, ratio between the neutron anisotropy and the fission-fragment anisotropy. Comparison between the Hauser-Feshbach Monte Carlo calculations using CGMF code, and preliminary experimental data from the Chi-Nu liquid scintillator array at LANL.

doi: 10.1103/PhysRevC.102.024621
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2020MA18      Phys.Rev. C 101, 044614 (2020)

P.Marini, J.Taieb, B.Laurent, G.Belier, A.Chatillon, D.Etasse, P.Morfouace, M.Devlin, J.A.Gomez, R.C.Haight, K.J.Kelly, J.M.O'Donnell, K.T.Schmitt

Prompt-fission-neutron spectra in the 239Pu(n, f) reaction

NUCLEAR REACTIONS 239Pu(n, F), E=0.7-700 MeV white pulsed neutron beam; measured E(n), I(n), neutron time-of-flight, fission fragments, (fission fragments)n-coin, prompt fission neutron spectrum (PFNS), and mean prompt fission neutron energy with respect to 252Cf(SF) using multiplate fission chamber coupled to the Chi-Nu liquid scintillator neutron detector array at the WNR facility of the Los Alamos Neutron Science Center (LANSC); deduced ratio of PFNS to a Maxwellian distribution, mean kinetic energy of PFN as a function of incident neutron energy, angular dependence. Comparison with theoretical predictions based on the Los Alamos model, ENDF/B-VIII.0 and JEFF3.3, and with previous experimental results.

doi: 10.1103/PhysRevC.101.044614
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14684.


2019KE04      Phys.Rev.Lett. 122, 072503 (2019)

K.J.Kelly, T.Kawano, J.M.O'Donnell, J.A.Gomez, M.Devlin, D.Neudecker, P.Talou, A.E.Lovell, M.C.White, R.C.Haight, T.N.Taddeucci, S.M.Mosby, H.Y.Lee, C.Y.Wu, R.Henderson, J.Henderson, M.Q.Buckner

Preequilibrium Asymmetries in the 239Pu(n, f) Prompt Fission Neutron Spectrum

NUCLEAR REACTIONS 239Pu(n, F), E=15-17.5 MeV; measured reaction products, En, In; deduced neutron excess of the preequilibrium prefission distribution above the postfission neutron spectrum. Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.122.072503
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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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2018NE02      Nucl.Data Sheets 148, 293 (2018)

D.Neudecker, P.Talou, T.Kawano, A.C.Kahler, M.C.White, T.N.Taddeucci, R.C.Haight, B.Kiedrowski, J.M.O'Donnell, J.A.Gomez, K.J.Kelly, M.Devlin, M.E.Rising

Evaluations of Energy Spectra of Neutrons Emitted Promptly in Neutron-induced Fission of 235U and 239Pu

NUCLEAR REACTIONS 235U, 239Pu(n, F)1NN, E<20 MeV; analyzed available data; deduced σ(E), total kinetic energies.

doi: 10.1016/j.nds.2018.02.006
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2017KE01      Phys.Rev. C 95, 015806 (2017)

K.J.Kelly, A.E.Champagne, L.N.Downen, J.R.Dermigny, S.Hunt, C.Iliadis, A.L.Cooper

New measurements of low-energy resonances in the 22Ne (p, γ) 23Na reaction

NUCLEAR REACTIONS 22Ne(p, γ), E=165, 192, 425, 441 keV; measured Eγ, Iγ, γγ-coin for resonances and direct capture process using HPGe-NaI detectors and plastic scintillator cosmic ray veto at LENA-TUNL facility. 23Na; deduced levels, resonance strengths, σγ for direct capture state, γ-ray branching ratios from singles and coincidence γ-ray data for resonant states, thermonuclear reaction rates.

doi: 10.1103/PhysRevC.95.015806
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2254. Data from this article have been entered in the XUNDL database. For more information, click here.


2016DA05      Phys.Rev. C 94, 025803 (2016)

S.Daigle, K.J.Kelly, A.E.Champagne, M.Q.Buckner, C.Iliadis, C.Howard

Measurement of the Ec.m.r = 259 keV resonance in the 14N(p, g)15O reaction

NUCLEAR REACTIONS 14N(p, γ)15O, E=270-310 keV; measured Eγ, Iγ using an HPGe detector and APEX array of NaI(Tl) detectors at LENA-TUNL facility. 15O; deduced levels, resonances, γ-ray branching ratios from the decay of the 259-keV proton resonance, resonance strength. Comparison with previous experimental data.

doi: 10.1103/PhysRevC.94.025803
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2238. Data from this article have been entered in the XUNDL database. For more information, click here.


2016DE36      Nucl.Instrum.Methods Phys.Res. 830, 427 (2016)

J.R.Dermigny, C.Iliadis, M.Q.Buckner, K.J.Kelly

γ-Ray spectroscopy using a binned likelihood approach

NUCLEAR REACTIONS 18O, 25Mg(p, γ), E not given; measured reaction products, Eγ, Iγ; deduced a novel data-analysis method for γ-ray spectroscopy, resonance parameters. Comparison with Monte Carlo calculations.

doi: 10.1016/j.nima.2016.06.017
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Data from this article have been entered in the XUNDL database. For more information, click here.


2015BU02      Phys.Rev. C 91, 015812 (2015)

M.Q.Buckner, C.Iliadis, K.J.Kelly, L.N.Downen, A.E.Champagne, J.M.Cesaratto, C.Howard, R.Longland

High-intensity-beam study of 17O(p, γ)18F and thermonuclear reaction rates for 17O + p

NUCLEAR REACTIONS 17O(p, γ), E=170-530 keV; measured Eγ, Iγ, γγ-coin at LENA-TUNL facility. 18F; deduced levels, J, π, resonances, γ branching ratios from resonance capture, and from direct capture as function of E(p), resonance strengths, total S(E) factors. 17O(p, γ), (p, α); deduced thermonuclear reaction rates. Comparison with previous results.

doi: 10.1103/PhysRevC.91.015812
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2155. Data from this article have been entered in the XUNDL database. For more information, click here.


2015KE05      Phys.Rev. C 92, 035805 (2015)

K.J.Kelly, A.E.Champagne, R.Longland, M.Q.Buckner

New recommended wγ for the Ec.m.r = 458 keV resonance in 22Ne(p, γ)23Na

NUCLEAR REACTIONS 22Ne(p, γ)23Na, E=494 keV; measured Eγ, Iγ, yields from the 458-keV resonance at LENA-TUNL; deduced γ-branching ratios for the primary transitions from the resonance, and resonance strength. Validation of the technique and comparison with previous experimental results.

doi: 10.1103/PhysRevC.92.035805
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Data from this article have been entered in the XUNDL database. For more information, click here.


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