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NSR database version of May 24, 2024.

Search: Author = S.Grimes

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2023VO08      Phys.Rev. C 108, 034302 (2023)

A.V.Voinov, N.Alanazi, S.Akhtar, S.Dhakal, C.R.Brune, S.M.Grimes, T.N.Massey, Z.Meisel, C.E.Parker, A.L.Richard

Spin cutoff factor and level density for 59Ni from an analysis of compound nuclear reactions

doi: 10.1103/PhysRevC.108.034302
Citations: PlumX Metrics


2022MA27      Phys.Rev. C 105, 054612 (2022)

T.N.Massey, J.E.O'Donnell, J.Ralston, S.M.Grimes, C.R.Brune, R.C.Haight

Charged-particle emission in neutron reactions on 10B

NUCLEAR REACTIONS 10B(n, p), (n, d), (n, t), (n, α), E=1-20 MeV; measured reaction products, Ep, Ip, Eα, Iα, deuteron spectra, triton spectra, In, angular distributions; deduced partial σ(E), σ(θ, E) for the emission of p0, p1, d0, t0, t1, α0, α1, α2, α3. 11B; deduced levels, J, π, molecular and cluster states. R-matrix analysis. Comparison to other experimental data and ENDF/B-VIII.0, ENDF/B-VII evaluations. Spallation neutron source at the Weapons Nuclear Research Facility (WNR) at the Los Alamos Neutron Science Center (LANSCE).

doi: 10.1103/PhysRevC.105.054612
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14663.


2021KO30      Ann.Nucl.Energy 162, 108501 (2021)

N.V.Kornilov, S.M.Grimes

Did we solve the old contradiction between microscopic and macroscopic experimental PFNS data?

RADIOACTIVITY 242Pu, 246,248Cm, 252Cf(SF); analyzed available data; deduced Prompt Fission Neutron Spectra (PFNS).

NUCLEAR REACTIONS 235U, 239,242Pu(n, F), E<5 MeV; analyzed available data; deduced Prompt Fission Neutron Spectra (PFNS).

doi: 10.1016/j.anucene.2021.108501
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2021SO05      Phys.Rev. C 103, 015802 (2021)

D.Soltesz, M.A.A.Mamun, A.V.Voinov, Z.Meisel, B.A.Brown, C.R.Brune, S.M.Grimes, H.Hadizadeh, M.Hornish, T.N.Massey, J.E.O'Donnell, W.E.Ormand

Determination of the 60Zn level density from neutron evaporation spectra

NUCLEAR REACTIONS 58Ni(3He, n), E=10 MeV; measured E(n), I(n) by time-of-flight method using NE213 liquid organic scintillators at Edwards Accelerator Laboratory; deduced differential σ(En) and for σ(Ep), the latter from experimental data in 2007Vo08, and compared to theoretical calculations using TALYS-V1.8. 60Zn; deduced level density for 60Zn as function of excitation energy up to 10 MeV, and compared to global theoretical models, including phenomenological, microscopic, and shell-model based calculations. Relevance to confirmation of Hauser-Feshbach formalism for 59Cu(p, γ)60Zn reaction rate at x-ray burst temperatures.

doi: 10.1103/PhysRevC.103.015802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2593.


2021VO11      Phys.Rev. C 104, 015805 (2021)

A.V.Voinov, K.Brandenburg, C.R.Brune, R.Giri, S.M.Grimes, T.Massey, Z.Meisel, S.N.Paneru, A.L.Richard, G.Perdikakis, A.Falduto

Reduction of the neutron imaginary potential off the stability line and its possible impact on neutron capture rates

NUCLEAR REACTIONS 48Ca(11B, X)59Mn*, E=21.8 MeV; measured E(n), I(n), E(p), I(p), Eα, Iα emitted by the compound nucleus 59Mn using ΔE-E Si detector telescope at the Edwards Accelerator Laboratory; analyzed optical model potentials (OMP) with their original parametrizations as well as with adjusted isovector imaginary components using EMPIRE code and BSFG Egidy level-density parametrization; deduced importance of inclusion of isovector component of the imaginary potential; discussed consequences for astrophysical reaction-rate calculations.

doi: 10.1103/PhysRevC.104.015805
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2654.


2020KO12      Nucl.Sci.Eng , 194, 335 (2020)

N.V.Kornilov, S.M.Grimes, T.N.Massey, C.E.Brient, D.E.Carter, J.E.O'Donnell, K.W.Cooper, A.D.Carlson, F.B.Bateman, C.R.Heimbach, N.Boukharouba

A High-Precision Tagged Neutron n-p Scattering Measurement at 14.9 MeV

NUCLEAR REACTIONS 1H(n, n), E=14.9 MeV; measured reaction products, Ep, Ip; deduced σ(θ). Comparison with ENDF/B-VII evaluated library.

doi: 10.1080/00295639.2019.1702408
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14656.


2019DH01      Nucl.Sci.Eng. 193, 1033 (2019)

S.Dhakal, C.R.Brune, T.N.Massey, S.M.Grimes, A.V.Voinov, S.Akhtar, An.P.D.Ramirez, A.L.Richard

Investigation of Neutron Cross Section for Iron in the ENDF Library wiTh. Pulsed Sphere Measurements

NUCLEAR REACTIONS 56Fe(n, n), (n, n'), E=7.2-10 MeV; measured reaction products, En, In; deduced σ. Comparison with MCNP simulations, ENDF/B libraries.

doi: 10.1080/00295639.2019.1591095
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2019GR05      Phys.Rev. C 99, 064331 (2019)

S.M.Grimes, T.N.Massey, A.V.Voinov

Level density rotational enhancement factor

NUCLEAR STRUCTURE 24Na, 25,26Mg, 159,161,162,163,164,165Dy, 235,238U; analyzed level densities for deformed nuclei with spherical and deformed spin distributions using resonance counting method, average level spacing at neutron separation energy, S(n), rotational enhancement factor. Comparison with level density predictions using the Bethe spin distribution for spherical nuclei.

doi: 10.1103/PhysRevC.99.064331
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2019VO05      Phys.Rev. C 99, 054609 (2019)

A.V.Voinov, T.Renstrom, D.L.Bleuel, S.M.Grimes, M.Guttormsen, A.C.Larsen, S.N.Liddick, G.Perdikakis, A.Spyrou, S.Akhtar, N.Alanazi, K.Brandenburg, C.R.Brune, T.W.Danley, S.Dhakal, P.Gastis, R.Giri, T.N.Massey, Z.Meisel, S.Nikas, S.N.Paneru, C.E.Parker, A.L.Richard

Level densities of 74, 76Ge from compound nuclear reactions

NUCLEAR STRUCTURE 68,70Zn(7Li, p), E=16 MeV; measured evaporated proton spectra from 2-25 MeV, σ, yields using silicon ΔE-E telescope at the Edwards tandem accelerator laboratory, Athens, Ohio. 74,76Ge; deduced nuclear level densities. Comparison with theoretical calculations using coupled-channel model of the EMPIRE code, GCM-RIPL-global, and BSFG-RIPL-global density models.

doi: 10.1103/PhysRevC.99.054609
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2018DI09      Phys.Rev. C 98, 024306 (2018)

D.A.Divaratne, C.R.Brune, H.N.Attanayake, T.Baumann, D.Bazin, A.Gade, S.M.Grimes, P.M.King, M.Thoennessen, J.A.Tostevin

One- and two-neutron removal cross sections of 24O

NUCLEAR REACTIONS 9Be(24O, 23O), (24O, 22O), E=92.3 MeV/nucleon, [secondary 24O beam from 9Be(48Ca, X), E=140 MeV/nucleon primary reaction, and using A1900 fragment separator at NSCL-MSU]; measured reaction products using S800 magnetic spectrograph, time of flight, parallel momentum distributions, and inclusive σ for one- and two-neutron removals. 22,23O; deduced levels, J, π, spectroscopic factors. 24O; deduced spherical, doubly-magic structure. Comparison with eikonal reaction model plus shell model calculations using USD-B interaction and the sd model space.

doi: 10.1103/PhysRevC.98.024306
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2354. Data from this article have been entered in the XUNDL database. For more information, click here.


2018YA23      Phys.Rev. C 98, 054621 (2018)

S.A.Yates, B.Fallin, C.R.Howell, Krishichayan, W.Tornow, S.M.Grimes

Measurement of the 80Se (γ, n) reaction with linearly polarized γ rays

NUCLEAR REACTIONS 80Se(polarized γ, n), E=15.6, 15.8, 16.0 MeV; measured E(n), I(n), neutron time-of-flight, differential σ(E, θ), total σ, linear polarization using liquid-scintillation detectors for neutron detection at HIGS-TUNL facility; deduced reaction matrix elements; data analyzed using (γ, n) reaction angular correlation formalism. 79Se; deduced nuclear level density, GDR, nuclear level density model that fits the data best. Comparison with statistical model calculations using Hauser-Feshbach formalism, and with previous experimental values. Relevance to time reversed 79Se(n, γ) reaction, and s-process formation of 82Kr.

doi: 10.1103/PhysRevC.98.054621
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0238.


2017HO21      Nucl.Sci.Eng. 188, 102 (2017)

B.Hoop, S.M.Grimes, M.Drosg

Estimation of d-2H Breakup Neutron Energy Distributions From d-3He

NUCLEAR REACTIONS 3He(d, X)1NN, E=6.15-12 MeV; measured reaction products, En, In; deduced σ(θ, E), σ(θ) break-up neutron σ.

doi: 10.1080/00295639.2017.1332892
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2016GR08      Phys.Rev. C 94, 014308 (2016)

S.M.Grimes, A.V.Voinov, T.N.Massey

Mass-number and excitation-energy dependence of the spin cutoff parameter

NUCLEAR STRUCTURE A=10-250; calculated spin cutoff parameters σ2 as function of mass number and compared with experimental values deduced from isomeric ratios using microscopic model. Comparison with previous semiempirical calculations. Recommend reanalysis of neutron resonance data for deformed nuclei using a corrected factor to convert s-wave resonance level density to the total level density.

doi: 10.1103/PhysRevC.94.014308
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2015RA11      Phys.Rev. C 92, 014303 (2015)

A.P.D.Ramirez, A.V.Voinov, S.M.Grimes, Y.Byun, C.R.Brune, T.N.Massey, S.Akhtar, S.Dhakal, C.E.Parker

Level density and mechanism of deuteron-induced reactions on 54, 56, 58Fe

NUCLEAR REACTIONS 54,56,58Fe(d, d), (d, n), (d, p), (d, α), E=5, 7, 9 MeV; measured neutron, protons, deuterons, and α particle spectra, σ(θ, E) at Ohio University tandem accelerator facility. 55,57,59Co, 55,57Fe, 52,54,56Mn; deduced nuclear level densities of the residual nuclei from best fit to compound double differential cross sections, and compared with Gilbert-Cameron model using Iljinov parameter systematics. Comparison with theoretical cross sections using Hartree-Fock-Bogoliubov method (HFBM) and Gilbert-Cameron model (GCM).

doi: 10.1103/PhysRevC.92.014303
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2164.


2015VO17      Phys.Rev. C 92, 064308 (2015)

A.V.Voinov, S.M.Grimes

E1 and M1 γ-strength functions in 144Nd

NUCLEAR REACTIONS 143Nd(n, γ), (n, αγ), E=thermal; analyzed σ(α), σ(γ), summed α widths, E1 and M1 γ-strength functions using available experimental data. Statistical model using Kadmensky-Markushev-Furman (KMF) and standard Lorentz (SLO) functions.

doi: 10.1103/PhysRevC.92.064308
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2014BY06      Phys.Rev. C 90, 044303 (2014)

Y.Byun, A.P.D.Ramirez, S.M.Grimes, A.V.Voinov, C.R.Brune, T.N.Massey

Deuteron-induced reactions on 89Y and nuclear level density of 90Zr

NUCLEAR REACTIONS 89Y(d, d), (d, n), (d, p), E=5, 6, 7.44 MeV; measured deuteron spectra, E(n), I(n), E(p), I(p), σ(E, θ), angle-integrated σ(E) at Ohio University tandem accelerator facility. 90Zr; deduced levels, J, π, configuration, level densities. Comparison with microscopic HFB model calculations using EMPIRE code.

doi: 10.1103/PhysRevC.90.044303
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2014CH24      Nucl.Data Sheets 118, 1 (2014)

M.B.Chadwick, E.Dupont, E.Bauge, A.Blokhin, O.Bouland, D.A.Brown, R.Capote, A.Carlson, Y.Danon, C.De Saint Jean, M.Dunn, U.Fischer, R.A.Forrest, S.C.Frankle, T.Fukahori, Z.Ge, S.M.Grimes, G.M.Hale, M.Herman, A.Ignatyuk, M.Ishikawa, N.Iwamoto, O.Iwamoto, M.Jandel, R.Jacqmin, T.Kawano, S.Kunieda, A.Kahler, B.Kiedrowski, I.Kodeli, A.J.Koning, L.Leal, Y.O.Lee, J.P.Lestone, C.Lubitz, M.MacInnes, D.McNabb, R.McKnight, M.Moxon, S.Mughabghab, G.Noguere, G.Palmiotti, A.Plompen, B.Pritychenko, V.Pronyaev, D.Rochman, P.Romain, D.Roubtsov, P.Schillebeeckx, M.Salvatores, S.Simakov, E.Sh.Soukhovitskii, J.C.Sublet, P.Talou, I.Thompson, A.Trkov, R.Vogt, S.van der Marck

The CIELO Collaboration: Neutron Reactions on 1H, 16O, 56Fe, 235, 238U, and 239Pu

COMPILATION 1H, 16O, 56Fe, 235,238U, 239Pu(n, x), E≈0-20 MeV; analyzed available data on σ, neutron multiplicity, criticality using ENDF/B-VII.1, JENDL-4.0, JEFF-3.1, ROSFOND 2010, CENDL-3.1, EAF-2010 evaluated nuclear libraries, Atlas of Neutron Resonances, Neutron Cross Section Standards evaluations; deduced recommendations for CIELO library, parameters, Maxwellian-averaged, thermal, californium σ, Westcott factors, resonance integrals. Compared with available data.

doi: 10.1016/j.nds.2014.04.002
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2014KO33      Nucl.Data Sheets 119, 413 (2014)

N.V.Kornilov, S.M.Grimes, T.N.Massey, C.E.Brient, D.E.Carter, J.E.O'Donnell, F.B.Bateman, A.D.Carlson, R.C.Haight, N.Boukharouba

Development of a New Method for Measurement of Neutron Detector Efficiency up to 20 MeV

doi: 10.1016/j.nds.2014.08.116
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2014LO09      Nucl.Data Sheets 119, 383 (2014)

W.Loveland, L.Yao, D.M.Asner, R.G.Baker, J.Bundgaard, E.Burgett, M.Cunningham, J.Deaven, D.L.Duke, U.Greife, S.Grimes, M.Heffner, T.Hill, D.Isenhower, J.L.Klay, V.Kleinrath, N.Kornilov, A.B.Laptev, T.N.Massey, R.Meharchand, H.Qu, J.Ruz, S.Sangiorgio, B.Selhan, L.Snyder, S.Stave, G.Tatishvili, R.T.Thornton, F.Tovesson, D.Towell, R.S.Towell, S.Watson, B.Wendt, L.Wood

Targets for Precision Measurements

doi: 10.1016/j.nds.2014.08.106
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2014MA58      Nucl.Data Sheets 119, 107 (2014)

T.N.Massey, J.Ralston, S.M.Grimes, R.C.Haight

10B(n, Z) Measurements in the Energy Range 0.7 to 5.0 MeV

NUCLEAR REACTIONS 10B(n, x), E=0.7-5.5 MeV; measured charged particles to discrete states using proportional ΔE and Si E detector and ToF; deduced σ, resonances; calculated σ using simple R-matrix. Compared with ENDF/B/VII. Preliminary. Further analysis in progress.

doi: 10.1016/j.nds.2014.08.030
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14663.


2014ME09      Nucl.Data Sheets 119, 373 (2014)

R.Meharchand, D.M.Asner, R.G.Baker, J.Bundgaard, E.Burgett, M.Cunningham, J.Deaven, D.L.Duke, U.Greife, S.Grimes, M.Heffner, T.Hill, D.Isenhower, J.L.Klay, V.Kleinrath, N.Kornilov, A.B.Laptev, W.Loveland, T.N.Massey, H.Qu, J.Ruz, S.Sangiorgio, B.Seilhan, L.Snyder, S.Stave, G.Tatishvili, R.T.Thornton, F.Tovesson, D.Towell, R.S.Towell, S.Watson, B.Wendt, L.Wood

Commissioning the NIFFTE Time Projection Chamber: Towards the 238U/235U(n, f) Cross-section Ratio

doi: 10.1016/j.nds.2014.08.103
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2014SN02      Nucl.Data Sheets 119, 386 (2014)

L.Snyder, D.M.Asner, R.G.Baker, J.Bundgaard, E.Burgett, M.Cunningham, J.Deaven, D.L.Duke, U.Greife, S.Grimes, M.Heffner, T.Hill, D.Isenhower, J.L.Klay, V.Kleinrath, N.Kornilov, A.B.Laptev, W.Loveland, T.N.Massey, R.Meharchand, H.Qu, J.Ruz, S.Sangiorgio, B.Seilhan, S.Stave, G.Tatishvili, R.T.Thornton, F.Tovesson, D.Towell, R.S.Towell, S.Watson, B.Wendt, L.Wood, for the NIFFTE Collaboration

Measuring the α/SF Branching Ratio of 252Cf with the NIFFTE TPC

doi: 10.1016/j.nds.2014.08.107
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2014ST15      Nucl.Data Sheets 119, 380 (2014)

S.Stave, D.M.Asner, R.G.Baker, J.Bundgaard, E.Burgett, M.Cunningham, J.Deaven, D.L.Duke, U.Greife, S.Grimes, M.Heffner, T.Hill, D.Isenhower, J.L.Klay, V.Kleinrath, N.Kornilov, A.B.Laptev, W.Loveland, T.N.Massey, R.Meharchand, H.Qu, J.Ruz, S.Sangiorgio, B.Seilhan, L.Snyder, G.Tatishvili, R.T.Thornton, F.Tovesson, D.Towell, R.S.Towell, S.Watson, B.Wendt, L.Wood, for the NIFFTE Collaboration

The Data Analysis Framework for the NIFFTE Fission Time Projection Chamber

doi: 10.1016/j.nds.2014.08.105
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2014VO07      Nucl.Data Sheets 119, 255 (2014)

A.V.Voinov, S.M.Grimes, C.R.Brune, A.Burger, A.Gorgen, M.Guttormsen, A.C.Larsen, T.N.Massey, S.Siem

Level Density Inputs in Nuclear Reaction Codes and the Role of the Spin Cutoff Parameter

NUCLEAR REACTIONS 57Fe(α, p), E=2-16 MeV; measured Ep, Ip(θ), Eα, Iα(θ) using ΔE-E Si telescope; deduced unnormalized σ; calculated σ using EMPIRE code with different level density models from RIPL-3 database.

doi: 10.1016/j.nds.2014.08.070
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2014WO02      Nucl.Data Sheets 119, 377 (2014)

L.Wood, D.M.Asner, R.G.Baker, J.Bundgaard, E.Burgett, M.Cunningham, J.Deaven, D.L.Duke, U.Greife, S.Grimes, M.Heffner, T.Hill, D.Isenhower, J.L.Klay, V.Kleinrath, N.Kornilov, A.B.Laptev, W.Loveland, T.N.Massey, R.Meharchand, H.Qu, J.Ruz, S.Sangiorgio, B.Seilhan, L.Snyder, S.Stave, G.Tatishvili, R.T.Thornton, F.Tovesson, D.Towell, R.S.Towell, S.Watson, B.Wendt, for the NIFFTE Collaboration

An Ethernet-based Data Acquisition System for the NIFFTE Time Projection Chamber

doi: 10.1016/j.nds.2014.08.104
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2013GR10      Phys.Rev. C 88, 024613 (2013)

S.M.Grimes

Hauser-Feshbach calculations in deformed nuclei

NUCLEAR REACTIONS 22Ne(α, α), (α, p), (α, n), (α, 2n), (α, γ), E=5, 11 MeV; 25Mg(n, α), (n, p), (n, n), (n, 2n), (n, γ), E=5, 11 MeV; 168Er(n, α), (n, p), (n, n'), (n, 2n), (n, 3n), (n, γ), E=1, 2, 6, 9, 16 MeV; 182W(n, α), (n, p), (n, n'), (n, 2n), (n, nα), (n, γ), E=0.5, 1, 4, 7, 10, 14 MeV; 183W(n, α), (n, p), (n, n'), (n, 2n), (n, nα), (n, γ), E=0.6, 1, 4, 7, 14 MeV; calculated σ ratios using a new Hauser-Feshbach method with K quantum number conserved and K-mixed for levels in target nuclei, and modification of level degeneracy in deformed nuclei. Cross section ratios calculated in (n, n') channel for ten lowest levels in 25Mg, fifteen levels in 168Er, ten levels in 182W and 12 levels in 183W.

doi: 10.1103/PhysRevC.88.024613
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2013RA32      Phys.Rev. C 88, 064324 (2013)

A.P.D.Ramirez, A.V.Voinov, S.M.Grimes, A.Schiller, C.R.Brune, T.N.Massey, A.Salas-Bacci

Nuclear level densities of 64, 66Zn from neutron evaporation

NUCLEAR REACTIONS 63Cu(d, n)64Zn, 65Cu(d, n)66Zn, E=6, 7.5 MeV; measured E(n), I(n), n(θ), σ(E, θ) using TOF technique at Edwards accelerator facility, Ohio University. Analysis by exciton model of nuclear reactions. Comparison with Hauser-Feshbach model calculations using EMPIRE and TALYS computer codes. Tested Fermi gas model, Gilber-Cameron model, and microscopic combinatorial approach with Hartree-Fock-Bogoliubov method (HFBM). 64,66Zn; deduced level densities versus the excitation energy.

doi: 10.1103/PhysRevC.88.064324
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2087.


2013TH04      Acta Phys.Pol. B44, 543 (2013)

M.Thoennessen, Z.Kohley, A.Spyrou, E.Lunderberg, P.A.DeYoung, H.Attanayake, T.Baumann, D.Bazin, B.A.Brown, G.Christian, D.Divaratne, S.M.Grimes, A.Haagsma, J.E.Finck, N.Frank, B.Luther, S.Mosby, T.Nagi, G.F.Peaslee, W.A.Peters, A.Schiller, J.K.Smith, J.Snyder, M.Strongman, A.Volya

Observation of Ground-state Two-neutron Decay

RADIOACTIVITY 16Be, 26O(2n); measured decay products, En, In; deduced decay energy spectra. Comparison with calculated two-neutron separation energies, T1/2, widths.

doi: 10.5506/APhysPolB.44.543
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2013VO12      Phys.Rev. C 88, 054607 (2013)

A.V.Voinov, S.M.Grimes, C.R.Brune, A.Burger, A.Gorgen, M.Guttormsen, A.C.Larsen, T.N.Massey, S.Siem

Experimental differential cross sections, level densities, and spin cutoffs as a testing ground for nuclear reaction codes

NUCLEAR REACTIONS 57Fe(α, p)60Co, 59Co(α, p)62Ni, E=21 MeV; 56Fe(7Li, p)62Ni, 55Mn(6Li, p)60Co, E=15 MeV; measured Ep, Ip, double-differential σ(θ); deduced spin cutoff parameter. Comparison with calculations using the EMPIRE reaction code, and different level density models. Excitation energy dependencies found to be inconsistent with the Fermi-gas model.

doi: 10.1103/PhysRevC.88.054607
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2349.


2012KO31      Nucl.Sci.Eng. 172, 278 (2012)

N.V.Kornilov, S.M.Grimes, A.Voinov

New Analysis of Neutron-Induced Reactions at 14.5 MeV

COMPILATION A=48-209; analyzed data for (n, 2n), (n, p) and (n, α) reactions; deduced systematics, simple parametrization. Comparison with nuclear model calculations, EMPIRE code.

doi: 10.13182/NSE11-61
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2012KU15      Phys.Rev. C 85, 054602 (2012)

S.Kunieda, R.C.Haight, T.Kawano, M.B.Chadwick, S.M.Sterbenz, F.B.Bateman, O.A.Wasson, S.M.Grimes, P.Maier-Komor, H.Vonach, T.Fukahori, Y.Watanabe

Measurement and model analysis of (n, xα) cross sections for Cr, Fe, 59Co, and 58, 60Ni from threshold energy to 150 MeV

NUCLEAR REACTIONS Cr, Fe, 59Co, 58,60Ni(n, xα), E=threshold-150 MeV; measured Eα, Iα, energy loss, σ(E) at WNR facility of LANSCE; analyzed model parameters; α formation factors, angle-integrated spectra, cross section. Statistical decay and pre-equilibrium reaction models, and clustering exciton model. Discussed uncertainties in nuclear level densities in statistical decay calculation. Comparison with previous studies.

doi: 10.1103/PhysRevC.85.054602
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14136.


2012LU07      Phys.Rev.Lett. 108, 142503 (2012)

E.Lunderberg, P.A.DeYoung, Z.Kohley, H.Attanayake, T.Baumann, D.Bazin, G.Christian, D.Divaratne, S.M.Grimes, A.Haagsma, J.E.Finck, N.Frank, B.Luther, S.Mosby, T.Nagi, G.F.Peaslee, A.Schiller, J.Snyder, A.Spyrou, M.J.Strongman, M.Thoennessen

Evidence for the Ground-State Resonance of 26O

RADIOACTIVITY 26O(2n) [from Be(27F, p)26O, E=82 MeV/nucleon];measured decay products, En, In. 26O; deduced decay energy spectrum, evidence for the ground state or resonance in neutron unbound nucleus, T1/2 limit. Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.108.142503
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1923. Data from this article have been entered in the XUNDL database. For more information, click here.


2011KO47      J.Korean Phys.Soc. 59, 1404s (2011)

N.V.Kornilov, T.Massey, S.Grimes

Evaluation of the Experimental np-Angular Distribution at 14.1 MeV Neutron Energy

NUCLEAR REACTIONS 1H(n, n'), E=14.1 MeV; reanalyzed, re-evaluated σ(θ). Comparison with data, ENDF/B-VII.

doi: 10.3938/jkps.59.1404
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2011VO06      Phys.Rev. C 83, 054605 (2011)

A.V.Voinov, S.M.Grimes, C.R.Brune, A.Burger, A.Gorgen, M.Guttormsen, A.C.Larsen, T.N.Massey, S.Siem, C.Kalbach

Equilibrium and pre-equilibrium processes in the 55Mn(6Li, x p) and 57Fe(α, x p) reactions

NUCLEAR REACTIONS 55Mn(6Li, xp), (6Li, xn), E=15 MeV; 57Fe(α, xp), E=30 MeV; measured neutron, proton and scattered α-particle spectra, cross sections, angular distributions. Comparison with calculations performed using the exciton pre-equilibrium model and Hauser-Feshbach evaporation model.

doi: 10.1103/PhysRevC.83.054605
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2010BO07      Phys.Rev. C 82, 014001 (2010)

N.Boukharouba, F.B.Bateman, A.D.Carlson, C.E.Brient, S.M.Grimes, T.N.Massey, R.C.Haight, D.E.Carter

Measurement of the n-p elastic scattering angular distribution at En=14.9 MeV

NUCLEAR REACTIONS 1H(n, n), E=14.9 MeV; measured Ep, Ip, σ, σ(θ). Comparison with predictions of phase-shift analysis and the ENDF/B-VII.0 evaluation.

doi: 10.1103/PhysRevC.82.014001
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2010VO01      Phys.Rev. C 81, 024319 (2010)

A.Voinov, S.M.Grimes, C.R.Brune, M.Guttormsen, A.C.Larsen, T.N.Massey, A.Schiller, S.Siem

γ-strength functions in 60Ni from two-step cascades following proton capture

NUCLEAR REACTIONS 59Co(p, 2γ), E=1.85 MeV; measured Eγ; analyzed two-step γ cascades populating 2+ state; deduced E1 and M1 γ-strength functions. Comparison with other studies.

doi: 10.1103/PhysRevC.81.024319
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2009OG06      Phys.Rev. C 80, 034305 (2009)

B.M.Oginni, S.M.Grimes, A.V.Voinov, A.S.Adekola, C.R.Brune, D.E.Carter, Z.Heinen, D.Jacobs, T.N.Massey, J.E.O'Donnell, A.Schiller

Test of level density models from reactions of 6Li on 58Fe and 7Li on 57Fe

NUCLEAR REACTIONS 58Fe(6Li, X), E=15 MeV; 57Fe(7Li, X), E=15 MeV; measured particle spectra, σ, angular distributions; deduced optical model parameters. 60Co, 63Ni; deduced level densities. Comparison with Hauser-Feshbach model calculations.

doi: 10.1103/PhysRevC.80.034305
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2009VO02      Phys.Rev. C 79, 031301 (2009)

A.V.Voinov, B.M.Oginni, S.M.Grimes, C.R.Brune, M.Guttormsen, A.C.Larsen, T.N.Massey, A.Schiller, S.Siem

Nuclear excitations at constant temperature

NUCLEAR REACTIONS 55Mn(6Li, X), (7Li, X), E=15 MeV; 59Co(d, p), (d, α), E=7.5 MeV; measured neutron and proton evaporation spectra, α spectra, σ. Hauser-Feshbach analysis. Comparison with predictions of constant temperature, Fermi-gas, and Hartree-Fock-BCS models.

doi: 10.1103/PhysRevC.79.031301
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2008DI10      Nucl.Sci.Eng. 159, 346 (2008)

A.R.Di Lullo, T.N.Massey, S.M.Grimes, D.E.Carter, J.E.O'Donnell, D.Jacobs

A Fission Chamber Measurement of the natB(d, n) Cross Section for Use in Neutron Detector Calibration

NUCLEAR REACTIONS B(d, n), E=7.5 MeV; 235U(n, F), E=0.9-19.6 MeV;measured neutron spectra, σ. Fission chamber, Calibration of neutron detector

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1714.


2008GR20      Phys.Rev. C 78, 057601 (2008)

S.M.Grimes

Conditions for observation of fade out of collective enhancement of the nuclear level density

doi: 10.1103/PhysRevC.78.057601
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2008HA24      Nucl.Sci.Eng. 160, 207 (2008)

M.H.Hadizadeh, S.M.Grimes

An Attempt to Improve Empirical Formulas for (n, p) and (n, α) Cross Sections

doi: 10.13182/NSE160-207
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2008VO02      Phys.Rev. C 77, 034613 (2008)

A.V.Voinov, S.M.Grimes, A.C.Larsen, C.R.Brune, M.Guttormsen, T.Massey, A.Schiller, S.Siem, N.U.H.Syed

Level densities of 44Sc and 47Ti from different experimental techniques

NUCLEAR REACTIONS 45Sc(3He, α), (3He, p), E=11 Mev; measured Eγ, Iγ, particle spectra, α particle angular distributions; deduced level density, αγ-coin. 44Sc, 47Ti; deduced level density. Comparison with theory.

doi: 10.1103/PhysRevC.77.034613
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2007AL49      Phys.Atomic Nuclei 70, 1634 (2007)

E.Algin, A.Schiller, A.Voinov, U.Agvaanluvsan, T.Belgya, L.A.Bernstein, C.R.Brune, R.Chankova, P.E.Garrett, S.M.Grimes, M.Guttormsen, M.Hjorth-Jensen, M.J.Hornish, C.W.Johnson, T.Massey, G.E.Mitchell, J.Rekstad, S.Siem, W.Younes

Bulk properties of iron isotopes

NUCLEAR REACTIONS 57Fe(3He, α), (3He, 3He'), E=45 MeV; 56Fe(n, γ), E=thermal; 55Mn(d, n), E=7.0 MeV; measured Eγ, Iγ. Deduced nuclear level densities and radiative strength functions. Compared results to model calculations.

doi: 10.1134/S1063778807090232
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2007VO08      Phys.Rev. C 76, 044602 (2007)

A.V.Voinov, S.M.Grimes, C.R.Brune, M.J.Hornish, T.N.Massey, A.Salas

Test of nuclear level density inputs for Hauser-Feshbach model calculations

NUCLEAR REACTIONS 59Co(d, n), (d, p), (d, α), 58Fe(3He, n), (3He, p), (3He, α)61Ni, E=7.5, 10 MeV; measured neutron, proton and α particle spectra, reaction cross sections. 57Fe, 60Ni, 60Cu; deduced level densities.

doi: 10.1103/PhysRevC.76.044602
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2006MC01      Nucl.Sci.Eng. 152, 15 (2006)

D.P.McNabb, J.D.Anderson, R.W.Bauer, F.S.Dietrich, S.M.Grimes, C.A.Hagmann

Comparison of Ramsauer and Optical Model Neutron Angular Distributions

NUCLEAR REACTIONS 208Pb(n, n), E < 60 MeV; analyzed σ(θ). Comparison of Ramsauer and optical model approaches, role of angular bin dispersion discussed.

doi: 10.13182/NSE06-A2558
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2006VO06      Phys.Rev. C 74, 014314 (2006)

A.V.Voinov, S.M.Grimes, U.Agvaanluvsan, E.Algin, T.Belgya, C.R.Brune, M.Guttormsen, M.J.Hornish, T.Massey, G.E.Mitchell, J.Rekstad, A.Schiller, S.Siem

Level density of 56Fe and low-energy enhancement of γ-strength function

NUCLEAR REACTIONS 55Mn(d, n), E=7 MeV; measured En, σ(E, θ). 56Fe deduced level density, γ-strength function.

doi: 10.1103/PhysRevC.74.014314
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2005PA50      Phys.Rev. C 72, 025802 (2005)

Y.Parpottas, S.M.Grimes, S.Al-Quraishi, C.R.Brune, T.N.Massey, J.E.O'Donnell, J.E.Oldendick, A.Salas, R.T.Wheeler

The 17F(p, γ)18Ne3+ resonance state studied with the 16O(3He, n)18Ne reaction

NUCLEAR REACTIONS 16O(3He, n), E=9.9-10.4 MeV; measured neutron spectra, σ(θ). 18Ne deduced resonance energy, width. Comparison with previous results.

doi: 10.1103/PhysRevC.72.025802
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2004BO12      Nucl.Phys. A734, 345 (2004)

H.G.Bohlen, R.Kalpakchieva, W.von Oertzen, T.N.Massey, B.Gebauer, S.M.Grimes, T.Kokalova, A.Lenz, M.Milin, Ch.Schulz, S.Thummerer, S.Torilov, A.Tumino

Particle-hole structures of neutron-rich Be- and C-isotopes

NUCLEAR REACTIONS 9Be(16O, 14O), E=233.5 MeV; 13C(12C, 14O), E not given; 13C(12C, 9C), E=230.7 MeV; measured σ(E, θ). 11Be, 16C deduced levels, J, π, configurations.

doi: 10.1016/j.nuclphysa.2004.01.063
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2004PA42      Phys.Rev. C 70, 065805 (2004); Erratum Phys.Rev. C 73, 049907 (2006)

Y.Parpottas, S.M.Grimes, S.Al-Quraishi, C.R.Brune, T.N.Massey, J.E.Oldendick, A.Salas, R.T.Wheeler

Astrophysically important 26Si states studied with the (3He, n) reaction and the 25Al(p, γ)26Si reaction rates in explosive hydrogen burning environments

NUCLEAR REACTIONS 24Mg(3He, n), E=7.9, 8.11, 10.0 MeV; measured En, σ(θ). 26Si deduced levels, J, π. 25Al(p, γ), E=low; calculated astrophysical reaction rates.

doi: 10.1103/PhysRevC.70.065805
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2004SA40      Phys.Rev. C 70, 024311 (2004)

A.Salas-Bacci, S.M.Grimes, T.N.Massey, Y.Parpottas, R.T.Wheeler, J.E.Oldendick

Level widths and level densities in 28Si, 46Ti, 52Cr, and 60Ni from Ericson fluctuations

NUCLEAR REACTIONS 27Al(p, n), E=7.4 MeV; 45Sc(p, n), E=5.2 MeV; 51V(p, n), E=3.1 MeV; 59Co(p, n), E=3.4 MeV; measured En, σ(E, θ). 28Si, 46Ti, 52Cr, 60Ni deduced level widths, level density parameters.

doi: 10.1103/PhysRevC.70.024311
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2003AL03      Phys.Rev. C 67, 015803 (2003)

S.I.Al-Quraishi, S.M.Grimes, T.N.Massey, D.A.Resler

Level densities for 20≤A≤110

NUCLEAR STRUCTURE 30P, 56Ni, 91Mo, 100Pd, 106Sn; A=20-110; analyzed level densities; deduced Z, N dependence features. Comparison with earlier analysis.

doi: 10.1103/PhysRevC.67.015803
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2003BO24      Yad.Fiz. 66, 1539 (2003); Phys.Atomic Nuclei 66, 1494 (2003)

H.G.Bohlen, W.von Oertzen, R.Kalpakchieva, B.Gebauer, S.M.Grimes, A.Lenz, T.N.Massey, M.Milin, Ch.Schulz, Tz.Kokalova, S.Torilov, S.Thummerer

Structure of Neutron-Rich Be and C Isotopes

NUCLEAR REACTIONS 9,10Be(14N, 13N), E=217.9 MeV; 9Be(13C, 11C), E=379 MeV; 9Be(15N, 12N), E=240 MeV; 10Be(14N, 12N), E=216 MeV; 12,13C(12C, 9C), E=230.7 MeV; measured excitation energy spectra. 9Be(16O, 14O), E=233.5 MeV; 13C(12C, 14O), E=230.7 MeV; measured σ(θ). 10,11,12Be deduced levels, J, π, configurations, rotational bands. 15,16C deduced level energies, widths, configurations.

doi: 10.1134/1.1601755
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2003BO38      Nucl.Phys. A722, 3c (2003)

H.G.Bohlen, R.Kalpakchieva, W.von Oertzen, T.N.Massey, B.Gebauer, S.M.Grimes, T.Kokalova, H.Lenske, A.Lenz, M.Milin, Ch.Schulz, S.Thummerer, S.Torilov, A.Tumino

Structure studies of neutron-rich Beryllium and Carbon isotopes

NUCLEAR REACTIONS 9Be(14N, 13N), E=217.9 MeV; 9Be(15N, 12N), E=240 MeV; 9Be(13C, 11C), E=379 MeV; 13C(12C, 9C), E=230.7 MeV; measured particle spectra, σ(E, θ). 10,11,12Be, 16C; deduced levels, J, π.

doi: 10.1016/S0375-9474(03)01327-7
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2003BO41      Phys.Rev. C 68, 054606 (2003)

H.G.Bohlen, R.Kalpakchieva, B.Gebauer, S.M.Grimes, H.Lenske, K.P.Lieb, T.N.Massey, M.Milin, W.von Oertzen, Ch.Schulz, T.Kokalova, S.Torilov, S.Thummerer

Spectroscopy of particle-hole states of 16C

NUCLEAR REACTIONS 12,13C(12C, 9C), E=230.7 MeV; measured particle spectra, σ(θ). 15,16C deduced levels, J, π, configurations.

doi: 10.1103/PhysRevC.68.054606
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2003BO50      Acta Phys.Hung.N.S. 18, 179 (2003)

H.G.Bohlen, W.von Oertzen, R.Kalpakchieva, B.Gebauer, S.M.Grimes, T.N.Massey, H.Lenske, A.Lenz, M.Milin, Ch.Schulz, T.Kokalova, S.Torilov, S.Thummerer

Structure Studies of Neutron-Rich Beryllium and Carbon Isotopes

NUCLEAR REACTIONS 9Be(13C, 11C), E=379 MeV; 9Be(14N, 13N), E=217.9 MeV; 9Be(15N, 12N), E=240 MeV; measured particle spectra. 10,11,12Be deduced rotational bands. 9Be(16O, 14O), E=233.5 MeV; 13C(12C, 14O), E=230.7 MeV; measured σ(E, θ). 11Be deduced levels, J, π. 13C(12C, 9C), E=230.7 MeV; measured particle spectra. 16C deduced levels. Quasiparticle RPA calculations.

doi: 10.1556/APH.18.2003.2-4.10
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2003DI03      Phys.Rev. C 67, 044606 (2003)

F.S.Dietrich, J.D.Anderson, R.W.Bauer, S.M.Grimes, R.W.Finlay, W.P.Abfalterer, F.B.Bateman, R.C.Haight, G.L.Morgan, E.Bauge, J.-P.Delaroche, P.Romain

Importance of isovector effects in reproducing neutron total cross section differences in the W isotopes

NUCLEAR REACTIONS 182,184,186W(n, X), E=5-560 MeV; measured total σ. Comparison with model predictions.

doi: 10.1103/PhysRevC.67.044606
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2003DI13      Phys.Rev. C 68, 064608 (2003)

F.S.Dietrich, J.D.Anderson, R.W.Bauer, S.M.Grimes

Wick's limit and new method for estimating neutron reaction cross sections

NUCLEAR REACTIONS 28Si, 40Ca, 59Co, 89Y, 140Ce, 208Pb(n, X), E ≈ 1-200 MeV; calculated reaction σ, deviation from Wick's limit. Analytic model.

doi: 10.1103/PhysRevC.68.064608
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2002BO01      Phys.Rev. C65, 014004 (2002); Erratum Phys.Rev. C 82, 039901 (2010)

N.Boukharouba, F.B.Bateman, C.E.Brient, A.D.Carlson, S.M.Grimes, R.C.Haight, T.N.Massey, O.A.Wasson

Measurement of the n-p Elastic Scattering Angular Distribution at En = 10 MeV

NUCLEAR REACTIONS 1H(n, p), E=10 MeV; measured reaction products, Ep, Ip; deduced σ(θ). Comparison with ENDF/B-V, ENDF/B-VI evaluated nuclear libraries, experimental data.

doi: 10.1103/PhysRevC.65.014004
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2002BO16      Yad.Fiz. 65, 635 (2002); Phys.Atomic Nuclei 65, 603 (2002)

H.G.Bohlen, W.von Oertzen, A.Blazevic, B.Gebauer, S.M.Grimes, R.Kalpakchieva, T.N.Massey, S.Thummerer

Structure Studies of 11Be and 12Be: Observation of molecular rotational bands

NUCLEAR REACTIONS 9Be(14N, 12N), E=217.9 MeV; 9Be(13C, 11C), E=379 MeV; 9Be(15N, 13N), E=240 MeV; 12C(14C, 14O), E=336 MeV; 9Be(15N, 12N), E not given; measured excitation energy spectra. 11,12Be deduced level energies, possible J, π, rotational band features.

doi: 10.1134/1.1471258
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2001AL20      Phys.Rev. C63, 065803 (2001)

S.I.Al-Quraishi, S.M.Grimes, T.N.Massey, D.A.Resler

Are the Level Densities for r- and rp-Process Nuclei Different from Nearby Nuclei in the Valley of Stability ?

NUCLEAR STRUCTURE A=20-70; analyzed level densities parameters; deduced N and Z dependence.

doi: 10.1103/PhysRevC.63.065803
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2001HO13      Nucl.Sci.Eng. 138, 145 (2001)

W.B.Howard, S.M.Grimes, T.N.Massey, S.I.Al-Quraishi, D.K.Jacobs, C.E.Brient, J.C.Yanch

Measurement of the Thick-Target 9Be(p, n) Neutron Energy Spectra

NUCLEAR REACTIONS 9Be(p, n), E=3.0, 3.4, 3.7, 4.0, 5.0 MeV; measured thick-target neutron spectra, angular distributions. Comparison with previous results, model predictions.

doi: 10.13182/NSE01-A2206
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2000AB40      Phys.Rev. C62, 064312 (2000)

W.P.Abfalterer, R.W.Finlay, S.M.Grimes

Level Widths and Level Densities of Nuclei in the 32 ≤ A ≤ 60 Mass Region Inferred from Fluctuation Analysis of Total Neutron Cross Sections

NUCLEAR REACTIONS C, F, 31P, 32S, 39K, 51V, 56Fe, 59Co(n, X), E=0.75-11.3 MeV; measured total σ. 32P, 33S, 40K, 52V, 57Fe, 60Co deduced level widths, level density parameters. White neutron source, fluctuation analysis.

doi: 10.1103/PhysRevC.62.064312
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2000AL35      Phys.Rev. C62, 044616 (2000)

S.I.Al-Quraishi, C.E.Brient, S.M.Grimes, T.N.Massey, J.Oldendick, R.Wheeler

Low Energy Deuteron-Induced Reactions on 27Al and 56Fe

NUCLEAR REACTIONS 27Al, 56Fe(d, d), (d, d'), (d, p), (d, α), (d, n), E=5, 7 MeV; measured particle spectra, σ(E, θ); deduced optical model parameters, reaction mechanism features.

doi: 10.1103/PhysRevC.62.044616
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2000GR01      Nucl.Sci.Eng. 134, 77 (2000)

S.M.Grimes, J.D.Anderson, R.W.Bauer, V.A.Madsen

Dependence of Neutron Total Cross Sections on Energy for 100 ≤ En ≤ 500 MeV and Mass Number for 7 ≤ A ≤ 238

NUCLEAR REACTIONS Be, O, Si, Ti, Cu, Y, Sn, Ta, 197Au, Pb, Bi(n, X), E=100-500 MeV; analyzed total σ; deduced parameters.

doi: 10.13182/NSE00-A2101
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2000GR18      Nucl.Sci.Eng. 135, 296 (2000)

S.M.Grimes, J.D.Anderson, R.W.Bauer

Application of a Simple Ramsauer Model for Neutron Total Cross Sections for Nuclear Mass Numbers A < 40

NUCLEAR REACTIONS B, C, N, O, Mg, Al, Si, P, S(n, X), E=6-60 MeV; analyzed total σ; deduced parameters. Ramsauer model.

doi: 10.13182/NSE00-A2142
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2000HU10      Phys.Rev. C62, 024002 (2000); Erratum Phys.Rev. C64, 019902 (2001)

P.-L.Huang, S.M.Grimes, T.N.Massey

Level Densities for Nuclei with 20 ≤ A ≤ 41

NUCLEAR STRUCTURE 24Na, 24,25Mg, 25,28Al, 28,29Si, 29P, 36Cl, 36,37Ar, 37K; analyzed level densities; deduced parameters.

doi: 10.1103/PhysRevC.62.024002
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1999BB04      Phys.Rev. C60, 064609 (1999)

F.B.Bateman, R.C.Haight, M.B.Chadwick, S.M.Sterbenz, S.M.Grimes, H.Vonach

Light Charged-Particle Production from Neutron Bombardment of Silicon up to 60 MeV: Role of level densities and isospin

NUCLEAR REACTIONS Si(n, pX), (n, dX), (n, αX), E < 60 MeV; measured proton spectra, deuteron spectra, α spectra, σ(E, θ), production σ; deduced isospin, level density effects. Statistical model calculations. Neutrons from spallation.

doi: 10.1103/PhysRevC.60.064609
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1999BO26      Prog.Part.Nucl.Phys. 42, 17 (1999)

H.G.Bohlen, A.Blazevic, B.Gebauer, W.von Oertzen, S.Thummerer, R.Kalpakchieva, S.M.Grimes, T.N.Massey

Spectroscopy of Exotic Nuclei with Multi-Nucleon Transfer Reactions

NUCLEAR REACTIONS 9Be(15N, 17F), E=240 MeV; 9,10Be(14C, 14O), E ≈ 335 MeV; 10Be(12C, 14O), (12C, 12N), E=357 MeV; 12C(12C, 12N), E=357 MeV; 9Be, 12C(13C, 13N), E=379 MeV; 9Be(13C, 12N), E=336 MeV; measured residual nuclei spectra. 7,8,9,10He deduced levels, possible J, π. 10Li deduced levels, J, π, configurations. 11Be deduced molecular rotational band.

doi: 10.1016/S0146-6410(99)00056-3
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1998BB08      Nucl.Sci.Eng. 130, 348 (1998)

R.W.Bauer, J.D.Anderson, S.M.Grimes, D.A.Knapp, V.A.Madsen

Application of a Simple Ramsauer Model for Neutron Total Cross Sections

NUCLEAR REACTIONS Ca, Ti, Cu, Sn, 197Au, Pb(n, X), E=6-60 MeV; analyzed total σ; deduced parameters. Ramsauer model, global fits.

doi: 10.13182/NSE98-A2011
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1998BO38      Nuovo Cim. 111A, 841 (1998)

H.G.Bohlen, W.von Oertzen, R.Kalpakchieva, A.Blazevic, B.Gebauer, S.M.Grimes, A.Lepine-Szily, T.N.Massey, W.Mittig, A.N.Ostrowski, J.M.Oliveira, P.Roussel-Chomaz, S.Thummerer, M.Wilpert

Nuclear Structure Studies of Bound and Unbound States in Drip-Line Nuclei

NUCLEAR REACTIONS 9Be(15N, 17F), (15N, 14O), E=240 MeV; 10Be(12C, 12N), E=357 MeV; 9Be(13C, 12N), E=336.4 MeV; 9Be(13C, 11C), E=379 MeV; 12C(14N, 15C), E=426 MeV; measured particle spectra. 7He, 10Li, 11N deduced resonances, J, π. 11Be deduced molecular rotational band.


1998GR28      Nucl.Sci.Eng. 130, 340 (1998)

S.M.Grimes, J.D.Anderson, R.W.Bauer, V.A.Madsen

Justification of a Simple Ramsauer Model for Neutron Total Cross Sections

NUCLEAR REACTIONS 140Ce, 208Pb(n, X), E=6-60 MeV; calculated total σ, scattering length; deduced refraction effects. Ramsauer model.

doi: 10.13182/NSE98-A2010
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1998MA96      Nucl.Sci.Eng. 129, 175 (1998)

T.N.Massey, S.Al-Quraishi, C.E.Brient, J.F.Guillemette, S.M.Grimes, D.Jacobs, J.E.O'Donnell, J.Oldendick, R.Wheeler

A Measurement of the 27Al(d, n) Spectrum for Use in Neutron Detector Calibration

NUCLEAR REACTIONS 27Al(d, n), E=7.44 MeV; measured neutron spectra. Application to detector calibration.

doi: 10.13182/NSE98-A1971
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1997BA01      Phys.Rev. C55, 133 (1997)

F.B.Bateman, S.M.Grimes, N.Boukharouba, V.Mishra, C.E.Brient, R.S.Pedroni, T.N.Massey, R.C.Haight

Determination of the 29Si Level Density from 3 to 22 MeV

NUCLEAR REACTIONS 27Al(d, n), E=2-6 MeV; measured neutron spectra, σ(θ) vs E. 28Si(n, p), E=5.52-12.97 MeV; measured σ(θ) vs E. 28Si(n, α), E=9.02 MeV; measured spectra. 29Si deduced level density. Three different data analysis techniques.

doi: 10.1103/PhysRevC.55.133
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13614.


1997BO10      Nucl.Phys. A616, 254c (1997)

H.G.Bohlen, W.von Oertzen, Th.Stolla, R.Kalpakchieva, B.Gebauer, M.Wilpert, Th.Wilpert, A.N.Ostrowski, S.M.Grimes, T.N.Massey

Study of Weakly Bound and Unbound States of Exotic Nuclei with Binary Reactions

NUCLEAR REACTIONS 10Be(12C, 12N), E=357 MeV; 9Be(13C, 12N), E=336.4 MeV; measured spectra. 10Li deduced resonance.

doi: 10.1016/S0375-9474(97)00096-1
Citations: PlumX Metrics


1997KE06      Nucl.Phys. A621, 243c (1997)

V.V.Ketlerov, A.A.Goverdovsky, V.A.Khryachkov, V.F.Mitrofanov, Yu.B.Ostapenko, R.C.Haight, P.E.Koehler, S.M.Grimes, R.S.Smith

Detailed Study of Double-Differential Cross-Sections for the 17O(n, α)14C Reaction

NUCLEAR REACTIONS 17O(n, γ), E < 1.01 MeV; measured α spectra, σ(θ).

doi: 10.1016/S0375-9474(97)00246-7
Citations: PlumX Metrics


1997MA34      Phys.Rev. C56, 365 (1997)

V.A.Madsen, J.D.Anderson, S.M.Grimes, V.R.Brown, P.M.Anthony

Minimum in the Forward Angle Quasielastic (p, n) Cross Section: A means of detecting rapid variations in the forward scattering amplitudes

NUCLEAR REACTIONS 90,91,92,94Zr(p, n), E=18, 25 MeV; analyzed reaction σ(θ). 140Ce(n, X), E=5-40 MeV; analyzed σ(total). DWBA calaculations, Ramsauer, nuclear surface effects.

doi: 10.1103/PhysRevC.56.365
Citations: PlumX Metrics


1996GR07      Phys.Rev. C53, 2709 (1996)

S.M.Grimes, R.W.Bauer, J.D.Anderson, V.R.Brown, B.A.Pohl, C.H.Poppe, V.A.Madsen, R.Langkau, W.Scobel, S.Stamer

Low-Lying Gamow-Teller States in 92Nb

NUCLEAR REACTIONS 90,92Zr(p, n), E=26 MeV; measured σ(E, θ). 90,92Nb levels deduced Gamow-Teller strength. Quasi-particle, shell models, RPA.

doi: 10.1103/PhysRevC.53.2709
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1996GR31      Nucl.Sci.Eng. 124, 271 (1996)

S.M.Grimes, C.E.Brient, F.C.Goeckner, F.B.Bateman, M.B.Chadwick, R.C.Haight, T.M.Lee, S.M.Sterbenz, P.G.Young, O.A.Wasson, H.Vonach

The 59Co(n, xα) Reaction from 5 to 50 MeV

NUCLEAR REACTIONS 59Co(n, xα), E=5-50 MeV; measured α-production σ(E), σ(θ); deduced reaction mechanism. Sequential reactions, Hauser-Feshbach plus preequilibrium processes calculations.

doi: 10.13182/NSE96-A28577
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13696.


1996ST29      Z.Phys. A356, 233 (1996)

Th.Stolla, H.G.Bohlen, B.Gebauer, S.M.Grimes, R.Kalpakchieva, T.N.Massey, W.von Oertzen, A.N.Ostrowski, M.Wilpert, Th.Wilpert

Spectroscopy of Excited States of 8He

NUCLEAR REACTIONS 10Be(12C, 14O), E=357 MeV; 12C, 16O(12C, 14O), E=357 MeV; measured ejectile energy spectra. 8He deduced levels, Γ

doi: 10.1007/BF02769222
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1995BO10      Nucl.Phys. A583, 775c (1995)

H.G.Bohlen, B.Gebauer, Th.Kirchner, M.von Lucke-Petsch, W.von Oertzen, A.N.Ostrowski, Ch.Seyfert, Th.Stolla, M.Wilpert, Th.Wilpert, S.M.Grimes, T.N.Massey, R.Kalpakchieva, Y.E.Penionzhkevich, D.V.Alexandrov, I.Mukha, A.A.Ogloblin, C.Detraz

Study of Light Neutron-Rich Nuclei with 14C-Induced Reactions

NUCLEAR REACTIONS 2H, 6Li(14C, 13N), E=336 MeV; 10Be, 12,14C, 16O(14C, 14O), 14C(14C, 12N), E=336 MeV; measured particle spectra, σ(θ) in some cases. 10He deduced resonances, possible J, π, Γ. 14Be, 16B deduced levels.

doi: 10.1016/0375-9474(94)00757-E
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1995BO15      Z.Phys. A351, 7 (1995)

H.G.Bohlen, R.Kalpakchieva, D.V.Aleksandrov, B.Gebauer, S.M.Grimes, T.Kirchner, M.von Lucke-Petsch, T.N.Massey, I.Mukha, W.von Oertzen, A.A.Ogloblin, A.N.Ostrowski, C.Seyfert, T.Stolla, M.Wilpert, T.Wilpert

Spectroscopy of Excited States of 11Li

NUCLEAR REACTIONS 10Be(14C, 13N), E=334.4 MeV; 14C(14C, 17F), E=335.6 MeV; measured spectra. 11Li deduced resonances energy, Γ.

doi: 10.1007/BF01292778
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1995GR01      Phys.Rev. C51, 606 (1995)

S.M.Grimes, T.N.Massey

New Expansion Technique for Spectral Distribution Calculations

doi: 10.1103/PhysRevC.51.606
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1995GR26      Nucl.Instrum.Methods Phys.Res. B99, 678 (1995)

S.M.Grimes, T.Covell, D.Jacobs, H.Zhou, F.B.Bateman, C.E.Brient, T.N.Massey

High Accuracy Determination of Neutron Energies from 300 keV to 5 MeV

NUCLEAR REACTIONS 57Fe(p, n), E=8.7 MeV; K, Br(p, n), E=3.4 MeV; measured neutron spectra. High accuracy tof spectrometer plus electrostatic accelerator system.

doi: 10.1016/0168-583X(94)00676-8
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1995VO05      Nucl.Phys. A588, 129c (1995)

W.von Oertzen, H.G.Bohlen, B.Gebauer, M.von Lucke-Petsch, A.N.Ostrowski, Ch.Seyfert, Th.Stolla, M.Wilpert, Th.Wilpert, D.V.Alexandrov, A.A.Korsheninnikov, I.Mukha, A.A.Ogloblin, R.Kalpakchieva, Y.E.Penionzhkevich, S.Piskor, S.M.Grimes, T.N.Massey

Nuclear Structure Studies of Very Neutron-Rich Isotopes of 7-10He, 9-11Li and 12-14Be Via Two-Body Reactions

NUCLEAR REACTIONS 6Li(14C, 13N), 12,14C(14C, 14O), (14C, 17F), E=335.9 MeV; 9Be(13C, 14O), (14C, 14O), E=337 MeV; 10Be(14C, 14O), (14C, 13N), E=334.4 MeV; measured residual nucleus spectra.

doi: 10.1016/0375-9474(95)00111-D
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1994HO34      Few-Body Systems 16, 127 (1994)

C.R.Howell, W.Tornow, H.R.Setze, R.T.Braun, D.E.Gonzalez Trotter, C.D.Roper, R.S.Pedroni, S.M.Grimes, C.E.Brient, N.Al-Niemi, F.C.Goeckner, G.Mertens

Resolution of Discrepancy between Backward Angle Cross-Section Data for Neutron-Deuteron Elastic Scattering

NUCLEAR REACTIONS 2H(n, n), E=8-14 MeV; measured σ(θ). Mixed CD2-CH2 foil, recoil d, p measured. Model comparison.

doi: 10.1007/BF01355285
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1994MI01      Phys.Rev. C49, 750 (1994)

V.Mishra, N.Boukharouba, C.E.Brient, S.M.Grimes, R.S.Pedroni

Level Density of 57Co

NUCLEAR REACTIONS 57Fe(p, n), E=5-8.7 MeV; 56Fe(d, n), E=3-5 MeV; measured neutron spectra, σ(θ); deduced angle integrated σ. 57Co deduced level density parameters.

doi: 10.1103/PhysRevC.49.750
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1994OS04      Phys.Lett. 338B, 13 (1994)

A.N.Ostrowski, H.G.Bohlen, B.Gebauer, S.M.Grimes, R.Kalpakchieva, Th.Kirchner, T.N.Massey, W.von Oertzen, Th.Stolla, M.Wilpert, Th.Wilpert

Spectroscopy of 10He

NUCLEAR REACTIONS 10Be, 16O, 12C(14C, 14O), E=334.4 MeV; measured spectra. 10He deduced mass, mass excess, two-neutron separation energy, resonances, Γ, possible J, π.

doi: 10.1016/0370-2693(94)91336-6
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1993AB03      Phys.Rev. C47, 1033 (1993)

W.Abfalterer, R.W.Finlay, S.M.Grimes, V.Mishra

Level Densities of 28Al, 29Si, and 41Ca Inferred from Fluctuation Measurements

NUCLEAR REACTIONS 27Al, 28Si, 40Ca(n, n), E=4-20 MeV; measured σ(E). 28Al, 29Si, 41Ca deduced level density.

doi: 10.1103/PhysRevC.47.1033
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1993MA15      Phys.Rev. C47, 2077 (1993)

V.A.Madsen, R.W.Bauer, J.D.Anderson, V.R.Brown, B.A.Pohl, C.H.Poppe, S.Stamer, E.Mordhorst, W.Scobel, S.M.Grimes

Theoretical Treatment of Analog (p, n) Cross Sections for Odd Nuclei: Application to measurements of 105Pd at 26 MeV

NUCLEAR REACTIONS 105Pd(p, n), E=26 MeV; measured σ(θ), neutron spectra. 105Ag deduced IAS excitation mechanism. Model comparison.

doi: 10.1103/PhysRevC.47.2077
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1992BO33      Phys.Rev. C46, 2375 (1992)

N.Boukharouba, C.E.Brient, S.M.Grimes, V.Mishra, R.S.Pedroni

Low Energy Optical Model Studies of Proton Scattering on 54Fe and 56Fe

NUCLEAR REACTIONS 54,56Fe(p, p), (p, p'), (p, γ), E=3.73-7.74 MeV; measured σ(θp), Eγ, Iγ; deduced model parameters, σ. Model analysis.

doi: 10.1103/PhysRevC.46.2375
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1992GR11      Z.Phys. A343, 125 (1992)

S.M.Grimes

Parameterization of the Nuclear Level Density at Energies Above 100 MeV

NUCLEAR STRUCTURE 40Ca, 90Zr; calculated level density vs excitation. Equidistant single particle states, Seeger-Howard levels. 20Ne, 40Ca, 100Ru, 90Zr; calculated level density, Woods-Saxon levels; deduced Fermi gas parameter vs excitation.

doi: 10.1007/BF01291816
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1992GR14      Phys.Rev. C46, 1064 (1992)

S.M.Grimes

Role of Isospin in Neutron- and Alpha-Induced Reactions

NUCLEAR REACTIONS 24Mg(α, X), (n, X), E not given; analyzed isospin role in reactions; deduced effects on exit channels.

doi: 10.1103/PhysRevC.46.1064
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1992MU01      Phys.Rev. C45, 1078 (1992)

M.G.Mustafa, M.Blann, A.V.Ignatyuk, S.M.Grimes

Nuclear Level Densities at High Excitations

NUCLEAR STRUCTURE 20Ne, 40Ca, 100Ru; calculated level densities. Fermi gas formulas, thermodynamic methods, shell model single particle levels.

doi: 10.1103/PhysRevC.45.1078
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1991MI20      Phys.Rev. C44, 2419 (1991); Erratum Phys.Rev. C47, 2426 (1993)

V.Mishra, N.Boukharouba, S.M.Grimes, K.Doctor, R.S.Pedroni, R.C.Haight

Determination of the Level Density of 29Si from Ericson Fluctuations

NUCLEAR REACTIONS 28Si(n, X), E=4-600 MeV; measured σ. 29Si deduced average level widths vs E, level density. Ericson fluctuations. White neutron source.

doi: 10.1103/PhysRevC.44.2419
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1991SA04      Nucl.Sci.Eng. 107, 365 (1991)

S.K.Saraf, C.E.Brient, P.M.Egun, S.M.Grimes, V.Mishra, R.S.Pedroni

Cross Sections and Spectra for the 54Fe and 56Fe(n, xp) and (n, xα) Reactions between 8 and 15 MeV

NUCLEAR REACTIONS 54,56Fe(n, xp), (n, xα), E=8, 9.5, 11 MeV; measured angle-integrated particle-spectra, σ(E); deduced reaction mechanism. 53,57,56,55,54Fe, 56,55,54,53Mn, 55,53,51Cr deduced level density parameters.

doi: 10.13182/NSE88-120
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1990AN10      Phys.Rev. C41, 1993 (1990)

J.D.Anderson, V.R.Brown, R.W.Bauer, B.A.Pohl, C.H.Poppe, S.Stamer, E.Mordhorst, W.Scobel, S.M.Grimes, V.A.Madsen

Analog (p, n) Cross Sections of Even-Even Palladium Isotopes at 26 MeV

NUCLEAR REACTIONS, ICPND 104,106,108,110Pd(p, n), E=26 MeV; measured σ(θ); deduced σ for analog states. Coupled-channels analyses.

doi: 10.1103/PhysRevC.41.1993
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1990AN12      Phys.Rev. C41, 2904 (1990)

J.D.Anderson, S.M.Grimes

Nuclear Ramsauer Effect and the Isovector Potential

NUCLEAR REACTIONS 142,140Ce, 139La, 141Pr(n, X), E=fast; calculated σ differences. Nuclear Ramsauer model, isovector potential.

doi: 10.1103/PhysRevC.41.2904
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1990GR12      Phys.Rev. C42, 2744 (1990)

S.M.Grimes

Energy Dependence of the Nuclear Level Density at Energies above 100 MeV

NUCLEAR STRUCTURE 40Ca, 90Zr; calculated level densities. Noninteracting fermions, exact iterative method.

doi: 10.1103/PhysRevC.42.2744
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1990SC14      Phys.Rev. C41, 2010 (1990)

W.Scobel, M.Trabandt, M.Blann, B.A.Pohl, B.R.Remington, R.C.Byrd, C.C.Foster, R.Bonetti, C.Chiesa, S.M.Grimes

Preequilibrium (p, n) Reaction as a Probe for the Effective Nucleon-Nucleon Interaction in Multistep Direct Processes

NUCLEAR REACTIONS 27Al, 90Zr, 208Pb(p, xn), E=120-160 MeV; measured σ(En, θ); deduced effective NN-interaction strength.

doi: 10.1103/PhysRevC.41.2010
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1989TR01      Phys.Rev. C39, 452 (1989); Erratum Phys.Rev. C39, 2089 (1989)

M.Trabandt, W.Scobel, M.Blann, B.A.Pohl, R.C.Byrd, C.C.Foster, R.Bonetti, S.M.Grimes

Preequilibrium Neutron Emission in the Reactions 90Zr, 208Pb(p, xn) with 80 MeV Projectiles

NUCLEAR REACTIONS 90Zr, 208Pb(p, xn), E=80 MeV; measured σ(E(n), θ(n)). Model calculations.

doi: 10.1103/PhysRevC.39.452
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