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NSR database version of May 24, 2024.

Search: Author = A.J.Sierk

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2018JA05      Phys.Rev. C 97, 034608 (2018)

P.Jaffke, P.Moller, P.Talou, A.J.Sierk

Hauser-Feshbach fission fragment de-excitation with calculated macroscopic-microscopic mass yields

NUCLEAR REACTIONS 235U, 239Pu(n, F), E=thermal; calculated pre-neutron-emission mass yields using various data sources in the three-Gaussian parametrization, average prompt neutron energy, average prompt γ-ray multiplicity, and average γ-ray energy, prompt neutron multiplicity distribution, correlation between average total kinetic energy of the fragments (TKE) and the average prompt neutron multiplicity, and normalized prompt fission neutron and γ spectra (PFNS, PFGS). Hauser-Feshbach statistical model with input mass yields from macroscopic-microscopic models of the potential energy surface for fragment mass yields, and emission of prompt neutrons and γ rays. Comparison with experimental data, and evaluations in ENDF/B-VIII.0.

doi: 10.1103/PhysRevC.97.034608
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2017MA14      Phys.Rev. C 95, 034613 (2017)

S.G.Mashnik, L.M.Kerby, K.K.Gudima, A.J.Sierk, J.S.Bull, M.R.James

Production of energetic light fragments in extensions of the CEM and LAQGSM event generators of the Monte Carlo transport code MCNP6

NUCLEAR REACTIONS 27Al(p, 6Li), E=200 MeV; 16O(p, 14C), (p, 7Be), E not given; 9Be(p, 6Li), (p, 7Be), E=190 MeV; 12C(p, α), E=1.2, 1.9, 2.5 GeV; Ag(p, 6Li), E=480 MeV; 9Be(48Ca, X), E=140 MeV/nucleon; 12C(14N, n), E=400 MeV/nucleon; 181Ta(p, t), E=400 GeV; 197Au(40Ar, X), E=137 MeV/nucleon; 20Ne, 208Pb(20Ne, X), E=800 MeV/nucleon; 197Au(p, X), E=1.2, 1.9 GeV; 197Au(197Au, 12C), E=400 MeV/nucleon; Ni(p, 7Li), E=1.2 GeV; 209Bi(n, t), E=317 MeV; Cu(γ, p), E=300 MeV; 56Fe(π+, n), E=1.5 GeV; 197Au(p, X), E=800 MeV; 209Bi(n, F), E=20-1000 MeV; 197Au(p, 7Li), E=1.2 GeV; Ni(p, t), (p, 7Li), E=2.5 GeV; calculated double differential σ and elemental σ for A=1-28 fragment production in reactions induced by pions, gammas, nucleons, and heavy ions at incident energies of 10 MeV/nucleon to 1 TeV/nucleon. Monte-Carlo event generators cascade-exciton model (CEM), and the Los Alamos version of the quark-gluon string model (LAQGSM) in MCNP6 transport model. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.034613
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2017SI21      Phys.Rev. C 96, 034603 (2017)

A.J.Sierk

Langevin model of low-energy fission

NUCLEAR REACTIONS 233,235U, 239Pu(n, F), E=thermal; calculated pre- and post-evaporation fragment yields, average and total fragment kinetic energy distributions as a function of fragment mass number. 233,235U, 239Pu(n, F), E<6 MeV; calculated average pre-evaporation total fragment kinetic energy as a function of incident neutron energy and post-evaporation fragment yields. Classical dissipative dynamical model with a macroscopic-microscopic potential-energy model, with a solution of Langevin equations in a five-dimensional space of nuclear deformations. Comparison with experimental data, systematics and evaluated data.

RADIOACTIVITY 240Pu, 252Cf(SF); calculated pre- and post-evaporation fragment yields, average and total fragment kinetic energy distribution as a function of fragment mass number. Classical dissipative dynamical model with a macroscopic-microscopic potential-energy model, with a solution of Langevin equations in a five-dimensional space of nuclear deformations. Comparison with experimental data.

doi: 10.1103/PhysRevC.96.034603
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2016MO08      At.Data Nucl.Data Tables 109-110, 1 (2016)

P.Moller, A.J.Sierk, T.Ichikawa, H.Sagawa

Nuclear ground-state masses and deformations: FRDM(2012)

NUCLEAR STRUCTURE A=16-339; calculated ground-state deformation parameters, β-decay Q-values, T1/2 and delayed neutron emission probabilities, neutron- and proton-separation energies, J, α-decay Q-value and T1/2, atomic masses. Comparison with available data.

doi: 10.1016/j.adt.2015.10.002
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2015MO03      Phys.Rev. C 91, 024310 (2015)

P.Moller, A.J.Sierk, T.Ichikawa, A.Iwamoto, M.Mumpower

Fission barriers at the end of the chart of the nuclides

NUCLEAR STRUCTURE Z=60-130, N=90-230, A=171-330; calculated fission-barrier heights, saddle-point energies for 5239 nuclei between the proton and neutron drip lines. 171Nd; calculated shape at saddle point. 298Hs; calculated potential energy surface contour in (ϵ2, γ) plane. Macroscopic-microscopic finite-range liquid-drop model with a 2002 set of macroscopic-model parameters.

doi: 10.1103/PhysRevC.91.024310
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2014KE03      Nucl.Data Sheets 118, 316 (2014)

L.M.Kerby, S.G.Mashnik, A.J.Sierk

Preequilibrium Emission of Light Fragments in Spallation Reactions

NUCLEAR REACTIONS 12C(p, α), (p, Be), (p, Li), (p, B), E=70 MeV; calculated σ(Eout, θ=600) using CEM03.03F. Compared to data. 9Be(p, 6Li), (p, 7Be), E=190, 300 MeV;27Al(p, 6Li), E=200 MeV;Ni(p, 7Li), (p, 7Be), E=1200 MeV; calculated σ(Eout, θ) using CEM03.03F. Compared to data.

doi: 10.1016/j.nds.2014.04.068
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2014MA39      Nucl.Data Sheets 118, 320 (2014)

S.G.Mashnik, A.J.Sierk, R.E.Prael

MCNP6 Fission Cross Section Calculations at Intermediate and High Energies

NUCLEAR REACTIONS 165Ho(p, F), E=100-3000 MeV;181Ta(p, F), E=80-500000 MeV;209Bi(n, F), E=30-1000 MeV;209Bi(γ, F), E=400-2800 MeV;235U(γ, F), E=20-4000 MeV; calculated fission σ using CEM03.03. Compared to data and other calculations.

doi: 10.1016/j.nds.2014.04.069
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2014MA41      Nucl.Data Sheets 118, 326 (2014)

S.G.Mashnik, A.J.Sierk

MCNP6 Study of Fragmentation Products from 112Sn+112Sn and 124Sn+124Sn at 1 GeV/A

NUCLEAR REACTIONS 112Sn(112Sn, x), E=1 GeV/A; calculated isotope production σ using MCNP6 with LAQGSM03.03 event generator. Compared to data.

doi: 10.1016/j.nds.2014.04.071
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2013IC01      Phys.Rev. C 87, 054326 (2013)

T.Ichikawa, P.Moller, A.J.Sierk

Character and prevalence of third minima in actinide fission barriers

NUCLEAR STRUCTURE 228,230,232,234,236Ra, 228,230,232,234,236,238Th, 228,230,232,234,236U, 234,236Pu; calculated depth and height of triple-humped fission barriers, third (hyperdeformed) minima. Folded-Yukawa single particle potential in a macroscopic-microscopic model.

doi: 10.1103/PhysRevC.87.054326
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2012IC01      Phys.Rev. C 86, 024610 (2012)

T.Ichikawa, A.Iwamoto, P.Moller, A.J.Sierk

Contrasting fission potential-energy structure of actinides and mercury isotopes

NUCLEAR STRUCTURE 178,180,182,184,186,188,190,192,194,196,198,200Hg, 236U; calculated potential-energy surfaces as function of quadrupole moment, saddle points, barrier heights and the ridge heights for fission. Asymmetric fission. Effect of shell structure of fission fragments. Macroscopic-microscopic approach, finite-range liquid-drop model (FRLDM).

doi: 10.1103/PhysRevC.86.024610
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2012MO02      At.Data Nucl.Data Tables 98, 149 (2012)

P.Moller, A.J.Sierk, R.Bengtsson, H.Sagawa, T.Ichikawa

Nuclear shape isomers

NUCLEAR STRUCTURE A=31-120; calculated potential-energy surfaces, deformations and all energy minima, shape isomers near 208Pb.

doi: 10.1016/j.adt.2010.09.002
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2012MO04      Phys.Rev. C 85, 024306 (2012)

P.Moller, J.Randrup, A.J.Sierk

Calculated fission yields of neutron-deficient mercury isotopes

RADIOACTIVITY 180Tl(EC); calculated Gamow-Teller β-strength function, T1/2. Comparison with experimental data. 174,176,178,180,182,184,186,188Hg(SF); calculated fragment mass yields. Method of Brownian shape motion.

NUCLEAR STRUCTURE 174,180,188Hg; calculated potential-energy surfaces, energy minima, saddles, major valleys, major ridges. Brownian shape motion (Metropolis) treatment.

doi: 10.1103/PhysRevC.85.024306
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2012VE06      Phys.Rev. C 86, 024308 (2012)

M.Veselsky, A.N.Andreyev, S.Antalic, M.Huyse, P.Moller, K.Nishio, A.J.Sierk, P.Van Duppen, M.Venhart

Fission-barrier heights of neutron-deficient mercury nuclei

RADIOACTIVITY 178,180Tl(β+), (EC); analyzed beta-delayed fission probability. 178,180Hg; deduced fission barrier heights using four alternative β-decay strength functions and four variants of the statistical model. 180Hg; calculated level densities, fission widths.

doi: 10.1103/PhysRevC.86.024308
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2011RA27      Phys.Rev. C 84, 034613 (2011)

J.Randrup, P.Moller, A.J.Sierk

Fission-fragment mass distributions from strongly damped shape evolution

NUCLEAR REACTIONS 239Pu(n, F)240Pu, E=8-14 MeV; 234,236U(n, F)235U/236U, E=8-14 MeV; 234U(γ, F)234U, E=8-14 MeV; 222,224,226,228Th(γ, F)222Th/224Th/226Th/228Th, E=8-14 MeV; calculated fission fragment mass and charge yields, comparison with experimental data. Random walks on a five-dimensional potential energy surface within the framework of the Smoluchowski equation of motion.

NUCLEAR STRUCTURE 222,224,226,228Th, 240Pu; calculated fission fragment mass and charge distributions. 222Th; calculated contours of three shapes relevant to fission, and the most probable symmetric fragment division in 111Rh isotope.

doi: 10.1103/PhysRevC.84.034613
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2010AN13      Phys.Rev.Lett. 105, 252502 (2010)

A.N.Andreyev, J.Elseviers, M.Huyse, P.Van Duppen, S.Antalic, A.Barzakh, N.Bree, T.E.Cocolios, V.F.Comas, J.Diriken, D.Fedorov, V.Fedosseev, S.Franchoo, J.A.Heredia, O.Ivanov, U.Koster, B.A.Marsh, P.Van den Bergh, J.Van De Walle, K.Nishio, R.D.Page, N.Patronis, M.Seliverstov, I.Tsekhanovich, M.Venhart, S.Vermote, M.Veselsky, C.Wagemans, T.Ichikawa, A.Iwamoto, P.Moller, A.J.Sierk

New Type of Asymmetric Fission in Proton-Rich Nuclei

RADIOACTIVITY 180Tl(α), (β+), (EC) [from U(p, X), E=1.4 GeV]; measured fission fragments, Eα, Iα, X-rays. 180Hg; deduced asymetric fission fragment distribution, branching ratio for β-delayed fission.

doi: 10.1103/PhysRevLett.105.252502
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Data from this article have been entered in the XUNDL database. For more information, click here.


2010CH41      Nucl.Data Sheets 111, 2923 (2010)

M.B.Chadwick, T.Kawano, D.W.Barr, M.R.Mac Innes, A.C.Kahler, T.Graves, H.Selby, C.J.Burns, W.C.Inkret, A.L.Keksis, J.P.Lestone, A.J.Sierk, P.Talou

Fission Product Yields from Fission Spectrum n+239Pu for ENDF/B-VII.1

NUCLEAR REACTIONS 239Pu(n, F)99Mo/95Zr/140Ba/144Ce/147Nd, E=0.2-2 MeV; measured fission products; deduced fission product yields and its energy dependence. Comparison with ENDF/B-VII.0 library, LANL-ILRR measurements.

doi: 10.1016/j.nds.2010.11.003
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2009MO18      Phys.Rev. C 79, 064304 (2009)

P.Moller, A.J.Sierk, T.Ichikawa, A.Iwamoto, R.Bengtsson, H.Uhrenholt, S.Aberg

Heavy-element fission barriers

NUCLEAR STRUCTURE Z=90-99, A=225-256; calculated double-humped fission barrier energies, first and second saddle heights, and fission-isomer energies. Z=78-125, N=91-188, A=171-312; calculated fission barrier heights for 1585 nuclides. 232Th; calculated proton and neutron single particle levels at saddles for symmetric and asymmetric fission modes. 228Th, 236U, 243Am, 252Cf, 278Nh, 305125; calculated potential energy surfaces. 232Th, 238,239,241,242,243Am; calculated fission-barrier structures and Fermi-gas level density parameters. Macroscopic-microscopic finite-range liquid-drop model.

RADIOACTIVITY 236U, 232,240Pu, 222,224,230Cm, 224,230Cf, 226,252,258Fm, 277Cn(α)(SF); calculated α-decay and SF decay half-lives. 180Tl, 188Bi, 192,194,196At, 228Np, 232,234Am, 238,240Bk, 242,244,246,248Es, 246,248,250Md(EC); calculated Q-values and fission barriers in the daughter nuclides. Macroscopic-microscopic finite-range liquid-drop model calculations. Comparisons with experimental data.

doi: 10.1103/PhysRevC.79.064304
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2009MO27      Phys.Rev.Lett. 103, 212501 (2009)

P.Moller, A.J.Sierk, R.Bengtsson, H.Sagawa, T.Ichikawa

Global Calculation of Nuclear Shape Isomers

NUCLEAR STRUCTURE A=31-290; calculated potential energy surfaces; 70,72,74,76,78Kr, 180Hg, 186Pb, 208Pb; deduced deformations, shape isomerism.

doi: 10.1103/PhysRevLett.103.212501
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2005IC01      Phys.Rev. C 71, 044608 (2005)

T.Ichikawa, A.Iwamoto, P.Moller, A.J.Sierk

Barrier for cold-fusion production of superheavy elements

NUCLEAR REACTIONS 208Pb(48Ca, X), (50Ti, X), (54Cr, X), (58Fe, X), (62Ni, X), (64Ni, X), (70Zn, X), (74Ge, X), (76Ge, X), 209Bi(58Fe, X), (64Ni, X), (70Zn, X), E not given; calculated fusion barrier energies, deformation effects. Comparisons with data.

doi: 10.1103/PhysRevC.71.044608
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2005MB02      J.Nucl.Radiochem.Sci. 6, No 2, A1 (2005)

S.G.Mashnik, M.I.Baznat, K.K.Gudima, A.J.Sierk, R.E.Prael

CEM03 and LAQGSM03: Extension of the CEM2k+GEM2 and LAQGSM Codes to Describe Photo-Nuclear Reactions at Intermediate Energies (30 MeV to 1.5 GeV)

NUCLEAR REACTIONS 1H(γ, π0), (γ, 2π0), (γ, π+), (γ, π+π-), (γ, π0π+), (γ, X), 2H(γ, n), E ≈ 1-10000 MeV; calculated σ, σ(θ). 12C, 16O, 27Al, 40Ca, 63Cu, 108Ag, 118Sn, 181Ta, 197Au, 208Pb, 232Th, 238U(γ, X), E ≈ 1-10000 MeV; calculated total photoabsorption σ. 197Au, 208Pb, 209Bi, 232Th, 233,235,238U, 237Np(γ, F), E ≈ 1-10000 MeV; calculated photofission σ. C, 64Cu(γ, pX), E ≈ 200-300 MeV; calculated proton spectra, σ(θ). C, Ca, Sn, Pb(γ, π+X), E=213 MeV; calculated pion spectra, σ(θ). 197Au(γ, X), E=1 GeV bremsstrahlung; calculated fragments isotopic yields. Improved cascade-exciton model, quark-gluon string model, comparisons with data.


2004IW02      Nucl.Phys. A738, 499 (2004)

A.Iwamoto, T.Ichikawa, P.Moller, A.J.Sierk

Cluster expression in fission and fusion in high-dimensional macroscopic-microscopic calculations

NUCLEAR STRUCTURE 272Ds; calculated fission potential energy surfaces.

NUCLEAR REACTIONS 208Pb(64Ni, X), E not given; calculated collision surface energy vs projectile deformation.

doi: 10.1016/j.nuclphysa.2004.04.096
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2004MO06      Phys.Rev.Lett. 92, 072501 (2004)

P.Moller, A.J.Sierk, A.Iwamoto

Five-Dimensional Fission-Barrier Calculations from 70Se to 252Cf

NUCLEAR STRUCTURE 70,76Se, 90,94,98Mo, 198Hg, 210,212Po, 228Ra, 228,230,232,234Th, 232,234,236,238,240U, 236,238,240,242,244,246Pu, 242,244,246,248,250Cm, 250,252Cf; calculated fission barrier parameters. Macroscopic-microscopic model, comparison with previous results.

doi: 10.1103/PhysRevLett.92.072501
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2004MO38      Prog.Theor.Phys.(Kyoto), Suppl. 154, 21 (2004)

P.Moller, A.J.Sierk, T.Ichikawa, A.Iwamoto

Fission and Fusion at the End of the Periodic System

NUCLEAR REACTIONS 208Pb(50Ti, X), (70Zn, X), E not given; calculated potential energy vs separation and deformation. 208Pb(48Ca, X), (50Ti, X), (54Cr, X), (58Fe, X), (62Ni, X), (64Ni, X), (70Zn, X), (74Ge, X), (76Ge, X), E not given; calculated fusion barrier energies; deduced microscopic and deformation effects.


2002IW02      J.Nucl.Sci.Technol.(Tokyo) 39, 332 (2002)

A.Iwamoto, P.Moller, D.G.Madland, A.J.Sierk

Mass Division in Nuclear Fission and Isotope Effect

NUCLEAR STRUCTURE 256,258Fm; calculated fission saddle point shapes; deduced mass-symmetric and mass-asymmetric modes.

doi: 10.1080/18811248.2002.9715198
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2002TI06      Phys.Rev. C65, 064610 (2002)

Yu.E.Titarenko, O.V.Shvedov, V.F.Batyaev, E.I.Karpikhin, V.M.Zhivun, A.B.Koldobsky, R.D.Mulambetov, S.V.Kvasova, A.N.Sosnin, S.G.Mashnik, R.E.Prael, A.J.Sierk, T.A.Gabriel, M.Saito, H.Yasuda

Cross Sections for Nuclide Production in 1 GeV Proton-Irradiated 208Pb

NUCLEAR REACTIONS 208Pb(p, X), E=1 GeV; measured fragments isotopic production σ. Comparison with results from inverse reactions, model predictions.

doi: 10.1103/PhysRevC.65.064610
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO0978.


2001MO13      Nature(London) 409, 785 (2001)

P.Moller, D.G.Madland, A.J.Sierk, A.Iwamoto

Nuclear Fission Modes and Fragment Mass Asymmetries in a Five-Dimensional Deformation Space

NUCLEAR STRUCTURE 228Ra, 234U, 256,258Fm; calculated potential energy surfaces; deduced fission mode features. 220,222,224,226,228,230,232Th, 228,230,232,234,236,238,240U, 234,236,238,240,242,244,246Pu, 240,242,244,246,248,250,252Cm, 246,248,250,252,254,256,258Cf, 246,248,250,252,254,256,258Fm; calculated average fragment mass division in asymmetric fission. Five-dimensional shape-coordinate grid. Comparisons with data.

doi: 10.1038/35057204
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2000MA08      Phys.Rev. C61, 034601 (2000)

S.G.Mashnik, R.J.Peterson, A.J.Sierk, M.R.Braunstein

Pion-Induced Transport of π Mesons in Nuclei

NUCLEAR REACTIONS Li, C, Zr, Fe, Bi(π-, π0), E=467 MeV; C, O, 27Al, Cu, Zr, Bi, (π-, π0), E=500 MeV; C(π+, π+), E=500 MeV; C, Cu, Zr, Bi(π+, π0), E=500 MeV; C, 27Al, Cu, Zr, Sn, Bi(π-, π0), E=400 MeV; O, Fe, Sn, Pb(π+, π0), E=165 MeV; measured pion spectra, σ(θ) following single-charge-exchange, no-charge-exchange processes; deduced nuclear medium effects. Intranuclear cascade model, cascade-exciton model.

doi: 10.1103/PhysRevC.61.034601
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1987SO13      Nucl.Phys. A471, 131c (1987)

L.G.Sobotka, D.G.Sarantites, Ze Li, E.L.Dines, M.L.Halbert, D.C.Hensley, R.P.Schmitt, Z.Majka, G.Nebbia, H.C.Griffin, A.J.Sierk

The Angular Momentum Dependence of Complex Fragment Emission

NUCLEAR REACTIONS 65Cu(45Sc, X), E=200 MeV; measured σ(fragment θ), γ(fragment)-coin, γ-multiplicity; deduced fragment emission angular momentum dependence.

doi: 10.1016/0375-9474(87)90247-8
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1987SO15      Phys.Rev. C36, 2713 (1987)

L.G.Sobotka, D.G.Sarantites, Ze Li, E.L.Dines, M.L.Halbert, D.C.Hensley, J.C.Lisle, R.P.Schmitt, Z.Majka, G.Nebbia, H.C.Griffin, A.J.Sierk

Angular Momentum Dependence of Complex Fragment Emission

NUCLEAR REACTIONS 65Cu(45Sc, X), E=200 MeV; measured σ(fragment θ), (γ-multiplicity)(X)-coin; deduced angular momentum in kinetic energy partition features.

doi: 10.1103/PhysRevC.36.2713
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1986CA04      Nucl.Phys. A452, 381 (1986)

N.Carjan, A.J.Sierk, J.R.Nix

Effect of Dissipation on Ternary Fission in very Heavy Nuclear Systems

NUCLEAR STRUCTURE A=100-300; calculated ternary fission fragment translational kinetic energy vs mass, dissipation dependence. Macroscopic dynamical model.

doi: 10.1016/0375-9474(86)90204-6
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1986GA12      Phys.Lett. 176B, 312 (1986)

A.Gavron, A.Gayer, J.Boissevain, H.C.Britt, J.R.Nix, A.J.Sierk, P.Grange, S.Hassani, H.A.Weidenmuller, J.R.Beene, B.Cheynis, D.Drain, R.L.Ferguson, F.E.Obenshain, F.Plasil, G.R.Young, G.A.Petitt, C.Butler

Neutron Emission Prior to Fission

NUCLEAR REACTIONS 142Nd(16O, F), E=207 MeV; measured fission(fragment)n-coin, σ(En, θn); deduced post, prior fission neutron multiplicity relationship. 158Er deduced fission barrier, other parameters, reduced nuclear dissipation coefficient limit.

doi: 10.1016/0370-2693(86)90170-X
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1986GR09      Phys.Rev. C34, 209 (1986)

P.Grange, S.Hassani, H.A.Weidenmuller, A.Gavron, J.R.Nix, A.J.Sierk

Effect of Nuclear Dissipation on Neutron Emission Prior to Fission

NUCLEAR REACTIONS 142Nd(16O, F), E=207 MeV; calculated neutron emission multiplicity prior to fission. 158Er deduced saddle to scission time vs reduced dissipation coefficient, Γf vs t. Bohr-Wheeler statistical model.

doi: 10.1103/PhysRevC.34.209
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1986NI06      Radiat.Eff. 92, 263 (1986)

J.R.Nix, D.G.Madland, A.J.Sierk

Effect of Fission Dynamics on the Spectra and Multiplicities of Prompt Fission Neutrons

NUCLEAR REACTIONS 235U(n, F), E=0.53 MeV; calculated prompt fission neutron spectra vs E; deduced multiple-chance fission role. Unified macroscopic-microscopic method.

NUCLEAR STRUCTURE 240Pu; calculated beyond fission saddle point dynamical evolution; deduced surface plus window dissipation role. Unified macroscopic-microscopic model.

doi: 10.1080/00337578608208336
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1986SI06      Phys.Rev. C33, 2039 (1986)

A.J.Sierk

Macroscopic Model of Rotating Nuclei

NUCLEAR STRUCTURE A=30-370; calculated fission barriers, maximum angular moment, ground state moments of inertia, saddle points. 97Rh, 153Tb, 176Os, 229Np; calculated fission barriers, moment of inertia vs angular momentum. Macroscopic model.

doi: 10.1103/PhysRevC.33.2039
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1985DA02      Phys.Rev. C31, 915 (1985)

K.T.R.Davies, A.J.Sierk

Conditional Saddle-Point Configurations

NUCLEAR STRUCTURE 208Bi; calculated fission saddle point configuration vs fissility, mass asymmetry. Liquid drop, Yukawa plus exponential nuclear energy models.

doi: 10.1103/PhysRevC.31.915
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1985SI11      Phys.Rev.Lett. 55, 582 (1985)

A.J.Sierk

Mass-Asymmetric Fission of Light Nuclei

NUCLEAR STRUCTURE 111In; calculated mass asymmetric fission barriers vs Z; deduced model dependence. Liquid drop, finite-range models.

doi: 10.1103/PhysRevLett.55.582
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1984GA03      Phys.Rev.Lett. 52, 589 (1984)

A.Gavron, P.Eskola, A.J.Sierk, J.Boissevain, H.C.Britt, K.Eskola, M.M.Fowler, H.Ohm, J.B.Wilhelmy, S.Wald, R.L.Ferguson

New Evaluation of Fission-Fragment Angular Distributions in Heavy-Ion Reactions

NUCLEAR REACTIONS 238U(16O, F), E=114, 140, 250 MeV; 238U, 174Yb(12C, F), E=95, 188 MeV; 198Pt(12C, F), E=95, 186 MeV; 192Os, 170Er, 142Nd(16O, F), E=140, 250 MeV; measured fission fragment σ(θ), yield anisotropies; deduced well defined fission barrier, saddle point K quantum number roles. Transition state model, other data analysis.

doi: 10.1103/PhysRevLett.52.589
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1984NI09      Nucl.Phys. A424, 239 (1984)

J.R.Nix, A.J.Sierk, H.Hofmann, F.Scheuter, D.Vautherin

Stationary Fokker-Planck Equation Applied to Fission Dynamics

NUCLEAR STRUCTURE 158Yb, 213At; calculated fission barrier height, excitation energy. Stationary Fokker-Planck fission dynamics treatment.

NUCLEAR REACTIONS 209Bi(α, F), E=120 MeV; calculated mean kinetic energy at scission point vs dissipation strength following fission. 150Nd(20Ne, 2n), E=176, 239 MeV; calculated saddle to scission time vs dissipation strength following residual nucleus fission. Stationary Fokker-Planck fission dynamics treatment.

doi: 10.1016/0375-9474(84)90184-2
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1984NI15      Nucl.Phys. A428, 161c (1984)

J.R.Nix, A.J.Sierk

Dynamics of Fission and Heavy Ion Reactions

NUCLEAR REACTIONS 208Pb(58Fe, X), E(cm)=238-363 MeV; calculated mass transfer vs angular momentum, capture σ vs E. 142Nd(16O, F), E=208 MeV; calculated mean saddle to scission time vs dissipation strength for fission. Unified macroscopic, microscopic description.

doi: 10.1016/0375-9474(84)90249-5
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1984PL01      Phys.Rev. C29, 1145 (1984)

F.Plasil, T.C.Awes, B.Cheynis, D.Drain, R.L.Ferguson, F.E.Obenshain, A.J.Sierk, S.G.Steadman, G.R.Young

Angular-Momentum-Dependent Fission Barriers in the Rare-Earth Region

NUCLEAR REACTIONS, ICPND 169Tm(12C, X), E=78.2, 100.8, 122.6 MeV; 159Tb(22Ne, X), E=113, 130, 161.5 MeV; measured evaporation residue production σ. 133Cs(20Ne, F), 141Pr, 169Tm(12C, F), 159Tb(22Ne, F), E not given; calculated fission σ vs excitation function. 153Tb, 181Re deduced level density parameters ratio (a(F)/a(ν)). Angular momentum dependent fission barriers, rotating liquid drop, rotating finite-range models.

doi: 10.1103/PhysRevC.29.1145
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1983DA13      Phys.Rev. C28, 679 (1983)

K.T.R.Davies, A.J.Sierk, J.R.Nix

Dynamical Thresholds for Compound-Nucleus Formation in Symmetric Heavy-Ion Reactions

NUCLEAR REACTIONS 110Pd(110Pd, X), E not given; calculated compound nucleus formation dynamical thresholds.

doi: 10.1103/PhysRevC.28.679
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1982LE19      Nucl.Phys. A388, 452 (1982)

G.A.Leander, R.K.Sheline, P.Moller, P.Olanders, I.Ragnarsson, A.J.Sierk

The Breaking of Intrinsic Reflection Symmetry in Nuclear Ground States

NUCLEAR STRUCTURE 218,220Po, 218,220,222,224,226Rn, 220,222,224,226,228,230,232,234Ra, 220,222,224,226,228,230,232,234,236Th, 222,224,226,228,230,232U; calculated potential energy minima. 223,225,227Ac, 227Ra, 229,231Th, 233Pa, 233U; calculated octupole separation energy. Intrinsic reflection symmetry breaking.

doi: 10.1016/0375-9474(82)90471-7
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1980NI01      Phys.Rev. C21, 396 (1980)

J.R.Nix, A.J.Sierk

Macroscopic Description of Isoscalar Giant Multipole Resonances

NUCLEAR STRUCTURE 208Pb; calculated energy, Γ of T=0, GMR. Distorted-Fermi-surface macroscopic model.

doi: 10.1103/PhysRevC.21.396
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1980SC29      Z.Phys. A297, 289 (1980)

G.Schutte, P.Moller, J.R.Nix, A.J.Sierk

Fission with Microscopic Energy Dissipation

RADIOACTIVITY, Fission 236U; calculated neutron, proton single particle energies, excitation of pair states, microscopic energy dissipation. Nonadiabatic BCS formalism.


1979DA03      Nucl.Phys. A315, 253 (1979)

J.M.Davidson, H.L.Berg, M.M.Lowry, M.R.Dwarakanath, A.J.Sierk, P.Batay-Csorba

Low Energy Cross Sections for 11B(p, 3α)

NUCLEAR REACTIONS 11B(p, 3α), E=35.4-1500 keV; measured σ(E, θ). 12C 16.11-MeV resonance deduced Γ; calculated astrophysical factor S(E), thermonuclear reaction rates. Enriched targets.

doi: 10.1016/0375-9474(79)90647-X
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetF0286.


1979KR08      Phys.Rev. C20, 992 (1979)

H.J.Krappe, J.R.Nix, A.J.Sierk

Unified Nuclear Potential for Heavy-Ion Elastic Scattering, Fusion, Fission, and Ground-State Masses and Deformations

NUCLEAR REACTIONS 12C(α, X), 28Si(16O, X), 208Pb(84Kr, X), E not given; calculated HI interaction potential. 28Si(16O, 16O), E=37.7, 81.0, 215.2 MeV; calculated σ(θ). 27Al(32S, X), 62Ni(35Cl, X), 208Pb(16O, X); calculated compound nuclear σ, fission barrier heights, ground-state masses. Unified nuclear potential model.

doi: 10.1103/PhysRevC.20.992
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1977DA16      Phys.Rev. C16, 1890 (1977)

K.T.R.Davies, R.A.Managan, J.R.Nix, A.J.Sierk

Rupture of the Neck in Nuclear Fission

NUCLEAR STRUCTURE 252Cf, 236U; calculated fission parameters.

doi: 10.1103/PhysRevC.16.1890
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1977NI02      Phys.Rev. C15, 2072 (1977)

J.R.Nix, A.J.Sierk

Calculation of Compound-Nucleus Cross Sections for Symmetric Very-Heavy-Ion Reactions

NUCLEAR REACTIONS 100Mo(100Mo, X), 110Pd(110Pd, X), 124Sn(124Sn, X); calculated compound nucleus σ. Liquid-drop model, hydrodynamical model.

doi: 10.1103/PhysRevC.15.2072
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1977SI13      Phys.Rev. C16, 1048 (1977)

A.J.Sierk, J.R.Nix

Effect of the Finite Range of the Nuclear Force on the Dynamics of Fission and Heavy-Ion Collisions

NUCLEAR REACTIONS 150Nd(150Nd, X); calculated fission dynamics for 236U, superheavy systems.

doi: 10.1103/PhysRevC.16.1048
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1976DA08      Phys. Rev. C13, 2385 (1976)

K.T.R.Davies, A.J.Sierk, J.R.Nix

Effect of Viscosity on the Dynamics of Fission

NUCLEAR STRUCTURE 236U, 252Cf; calculated effect of viscosity on fission dynamics.

doi: 10.1103/PhysRevC.13.2385
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1973SI27      Nucl.Phys. A210, 341 (1973)

A.J.Sierk, T.A.Tombrello

The 9Be(p, α) and (p, d) Cross Sections at Low Energies

NUCLEAR REACTIONS 9Be(p, d), (p, α);E=30-700 keV, measured σ(E); E=100-600 keV, measured σ(E, θ). 10B deduced resonance parameters.

doi: 10.1016/0375-9474(73)90307-2
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetF0169.


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