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NSR database version of April 11, 2024.

Search: Author = L.W.Townsend

Found 27 matches.

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2016PH02      Phys.Rep. 612, 1 (2016)

D.G.Phillips II, W.M.Snow, K.Babu, S.Banerjee, D.V.Baxter, Z.Berezhiani, M.Bergevin, S.Bhattacharya, G.Brooijmans, L.Castellanos, M.-C.Chen, C.E.Coppola, R.Cowsik, J.A.Crabtree, P.Das, E.B.Dees, A.Dolgov, P.D.Ferguson, M.Frost, T.Gabriel, A.Gal, F.Gallmeier, K.Ganezer, E.Golubeva, G.Greene, B.Hartfiel, A.Hawari, L.Heilbronn, C.Johnson, Y.Kamyshkov, B.Kerbikov, M.Kitaguchi, B.Z.Kopeliovich, V.B.Kopeliovich, V.A.Kuzmin, C-Y.Liu, P.McGaughey, M.Mocko, R.Mohapatra, N.Mokhov, G.Muhrer, H.P.Mumm, L.Okun, R.W.Pattie, Jr., C.Quigg, E.Ramberg, A.Ray, A.Roy, A.Ruggles, U.Sarkar, A.Saunders, A.P.Serebrov, H.M.Shimizu, R.Shrock, A.K.Sikdar, S.Sjue, S.Striganov, L.W.Townsend, R.Tschirhart, A.Vainshtein, R.Van Kooten, Z.Wang, A.R.Young

Neutron-antineutron oscillations: Theoretical status and experimental prospects

COMPILATION A=1; compiled experimental and theoretical information.

doi: 10.1016/j.physrep.2015.11.001
Citations: PlumX Metrics


2012NO04      Radiat.Meas. 47, 315 (2012)

J.W.Norbury, J.Miller, A.M.Adamczyk, L.H.Heilbronn, L.W.Townsend, S.R.Blattnig, R.B.Norman, S.B.Guetersloh, C.J.Zeitlin

Nuclear data for space radiation

COMPILATION Z<100; compiled elemental and isotopic σ, σ(θ), σ(θ, E).

doi: 10.1016/j.radmeas.2012.03.004
Citations: PlumX Metrics


2007NO01      J.Phys.(London) G34, 115 (2007)

J.W.Norbury, L.W.Townsend, R.B.Norman

Threshold meson production and cosmic ray transport

NUCLEAR REACTIONS 1H(p, π0X), E=290-11500 MeV; 1H(p, K+X), E=1.58-50 GeV; C(C, π0X), E=60-11500 MeV/nucleon; Ni(Ni, K+X), E=0.8-50 MeV/nucleon; analyzed pion and kaon production σ. Implications for cosmic ray transport discussed.

doi: 10.1088/0954-3899/34/1/007
Citations: PlumX Metrics


2007NO03      Nucl.Instrum.Methods Phys.Res. B254, 187 (2007)

J.W.Norbury, L.W.Townsend

Parameterized total cross sections for pion production in nuclear collisions

NUCLEAR REACTIONS F, Na, Cu, Pb(Ne, π+X), (Ne, π-X), K, Cl, Pb(Ar, π+X), (Ar, π-X), C, Pb(C, π-X), Ca(Ar, π0X), Zr(Kr, π0X), Au(Au, π0X), E ≈ 0.2-2.5 GeV/nucleon; C, F, Na, K, Cl, Cu, Pb(p, π-X), E ≈ 0.2-2.5 GeV; calculated pion production σ. Comparison with data.

doi: 10.1016/j.nimb.2006.11.054
Citations: PlumX Metrics


1999TO06      Nucl.Instrum.Methods Phys.Res. B149, 401 (1999)

L.W.Townsend, C.R.Ramsey, R.K.Tripathi, F.A.Cucinotta, J.W.Norbury

Optical Model Methods of Predicting Nuclide Production Cross Sections from Heavy Ion Fragmentation

NUCLEAR REACTIONS C(40Ar, X), E=1.65 GeV/nucleon; H(36Ar, X), E=765 MeV/nucleon; calculated isotope production σ. H, C, 27Al, Cu, Pb(56Fe, X), E=1.05 GeV/nucleon; C(137La, X), E=1.2 GeV/nucleon; calculated element production σ. Optical potential abrasion-ablation-FSI fragmentation model. Comparisons with data.

doi: 10.1016/S0168-583X(98)00957-4
Citations: PlumX Metrics


1998RA02      Phys.Rev. C57, 982 (1998)

C.R.Ramsey, L.W.Townsend, R.K.Tripathi, F.A.Cucinotta

Optical Model Methods of Predicting Nuclide Production from Spallation Reactions

NUCLEAR REACTIONS, ICPND Fe(p, X), E=1.05 GeV; calculated nuclide production yields. Comparison with data. Optical potential method, abrasion-ablation model.

doi: 10.1103/PhysRevC.57.982
Citations: PlumX Metrics


1997CU02      Nucl.Phys. A619, 202 (1997)

F.A.Cucinotta, J.W.Wilson, L.W.Townsend

Abrasion-Ablation Model for Neutron Production in Heavy Ion Collisions

NUCLEAR REACTIONS 23Na, 19F(20Ne, X), E=390, 800 MeV/nucleon; Pb(20Ne, X), E=800 MeV/nucleon; 93Nb(93Nb, X), E=800 MeV/nucleon; analyzed neutron σ(E) at θ=0°; deduced contributions from abrasion, ablation stages. Comparison with experiment. Glauber model, statistical evaporation model.

doi: 10.1016/S0375-9474(97)00130-9
Citations: PlumX Metrics


1994TO07      Phys.Rev. C49, 3158 (1994)

L.W.Townsend

Optical Model Analyses of Heavy Ion Fragmentation in Hydrogen Targets

NUCLEAR REACTIONS 1H(139La, X), E=1.2 GeV/nucleon; 1H(32S, X), E=400 MeV/nucleon; calculated fragment production σ. Quantum mechanical optical model.

doi: 10.1103/PhysRevC.49.3158
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1994TR02      Phys.Rev. C49, R1775 (1994)

R.K.Tripathi, L.W.Townsend, F.Khan

Role of Intrinsic Width in Fragment Momentum Distributions in Heavy Ion Collisions

NUCLEAR REACTIONS C(40Ar, X), E=1.65 GeV/nucleon; Ag(197Au, X), E=980 MeV/nucleon; analyzed fragmentation data. Calculation of intrinsic widths with correlations.

doi: 10.1103/PhysRevC.49.R1775
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1994TR03      Phys.Rev. C49, 2237 (1994)

R.K.Tripathi, L.W.Townsend

Simple Parametrization of Fragment Reduced Widths in Heavy Ion Collisions

NUCLEAR REACTIONS 9Be, C, 27Al, Cu, Ag, Pb(12C, X), (16O, X), 197Au(16O, X), K, Cl, C(40Ar, X), 197Au(84Kr, X), C(93Nb, X), (139La, X), (197Au, X), Ag(197Au, X), E ≈ 0.1-2.1 GeV/nucleon; analyzed fragment reduced widths; deduced simple parametrization.

doi: 10.1103/PhysRevC.49.2237
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1994TR07      Phys.Rev. C50, R7 (1994)

R.K.Tripathi, L.W.Townsend

Bose Condensation of Nuclei in Heavy Ion Collisions

doi: 10.1103/PhysRevC.50.R7
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1993JO04      Phys.Rev. C48, 766 (1993)

S.John, L.W.Townsend, J.W.Wilson, R.K.Tripathi

Geometric Model for Nuclear Absorption from Microscopic Theory

NUCLEAR REACTIONS 1H, 4He, 12C(12C, X), E ≥ 500 MeV/nucleon; calculated absorption σ(E). Geometrical model.

doi: 10.1103/PhysRevC.48.766
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1992CU03      Phys.Rev. C46, 1451 (1992)

F.A.Cucinotta, L.W.Townsend, J.W.Wilson

Multiple-Scattering Effects in Quasielastic α-4He Scattering

NUCLEAR REACTIONS 4He(α, α), E at 7 GeV/c; calculated α-particle σ(θ) vs momentum. Multiple scattering series.

doi: 10.1103/PhysRevC.46.1451
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1991MA03      Phys.Rev. C43, 1378 (1991)

K.M.Maung, F.Gross, J.A.Tjon, L.W.Townsend, S.J.Wallace

Relativistic Proton-Nucleus Scattering and One-Boson-Exchange Models

NUCLEAR REACTIONS 40Ca(polarized p, p), E=200-500 MeV; analyzed σ(θ), analyzing power, spin rotation parameter vs θ. Relativistic approach.

doi: 10.1103/PhysRevC.43.1378
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1989CU05      Phys.Lett. 223B, 127 (1989)

F.A.Cucinotta, G.S.Khandelwal, L.W.Townsend, J.W.Wilson

Correlations in α-α Scattering and Semi-Classical Optical Models

NUCLEAR REACTIONS 4He(α, α), E at 5.05, 7 GeV/c; calculated angle integrated spectra. Semi-classical optical models.

doi: 10.1016/0370-2693(89)90226-8
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1989GR12      Phys.Rev. C40, R10 (1989)

F.Gross, Khin Maung Maung, J.A.Tjon, L.W.Townsend, S.J.Wallace

Pseudoscalar πN Coupling and Relativistic Proton-Nucleus Scattering

NUCLEAR REACTIONS 40Ca(polarized p, p), E=200 MeV; measured σ(θ), analyzing power vs θ, spin rotation parameter vs θ. Relativistic approach, pseudoscalar π-nucleon coupling.

doi: 10.1103/PhysRevC.40.R10
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1988TO02      Phys.Rev. C37, 892 (1988)

L.W.Townsend, J.W.Wilson

Comment on ' Trends of Total Reaction Cross Sections for Heavy Ion Collisions in the Intermediate Energy Range '

NUCLEAR REACTIONS 27Al, 12C, 89Y(12C, X), E=30-300 MeV/nucleon; 89Y, 27Al(16O, X), E=30 MeV/nucleon; 27Al(20Ne, X), E=30, 100, 300 MeV/nucleon; Ag(20Ne, X), E=300 MeV/nucleon; calculated reaction σ. Semi-empirical, energy dependent surface transparency factor.

doi: 10.1103/PhysRevC.37.892
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1986DE15      Nucl.Phys. A454, 733 (1986)

P.A.Deutchman, J.W.Norbury, L.W.Townsend

Theoretical Contributions to Coherent Pion Production in Subthreshold and Relativistic Heavy-Ion Collisions

NUCLEAR REACTIONS 12C(16O, π), E=85, 400 MeV/nucleon; calculated coherent pion production σ.

doi: 10.1016/0375-9474(86)90115-6
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1986DE34      Phys.Rev. C34, 2377 (1986)

P.A.Deutchman, K.M.Maung, J.W.Norbury, J.O.Rasmussen, L.W.Townsend

Δ Excitations and Shell-Model Information in Heavy-Ion, Charge-Exchange Reactions

NUCLEAR STRUCTURE 12B, 12N; calculated nucleon, isobar particle states.

NUCLEAR REACTIONS 12C(12C, 12B), (12C, 12N), E not given; calculated σ(θ), coherent pion production σ. Multipole expansion, harmonic oscillator.

doi: 10.1103/PhysRevC.34.2377
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1986NO01      Phys.Rev. C33, 377 (1986)

J.W.Norbury, L.W.Townsend

Theoretical Estimates of Photoproduction Cross Sections for Neutral Subthreshold Pions in Carbon-Carbon Collisions

NUCLEAR REACTIONS 12C(12C, π0), E=34-300 MeV; calculated σ(E); deduced negligible photoprocess contribution to pion production.

doi: 10.1103/PhysRevC.33.377
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1986TO06      Radiat.Res. 106, 283 (1986)

L.W.Townsend, J.W.Wilson

Energy-Dependent Parameterization of Heavy-Ion Absorption Cross Sections

NUCLEAR REACTIONS 12C(α, α), 12C, 16O(12C, 12C), E=0.01-10 GeV/nucleon; calculated absorption σ(E). Energy-dependent parametrization.

doi: 10.2307/3576735
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1986TO10      Phys.Rev. C34, 1491 (1986)

L.W.Townsend, J.W.Wilson, F.A.Cucinotta, J.W.Norbury

Comparison of Abrasion Model Differences in Heavy Ion Fragmentation: Optical versus geometric models

NUCLEAR REACTIONS C(40Ar, X), E=213 MeV/nucleon; calculated fragment isotope production σ for X=Ar, Si, Mg. Geometric, optical abrasion models.

doi: 10.1103/PhysRevC.34.1491
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1985NO06      Phys.Rev.Lett. 55, 681 (1985)

J.W.Norbury, F.A.Cucinotta, P.A.Deutchman, L.W.Townsend

Theoretical Spectral Distributions and Total Cross Sections for Neutral Subthreshold Pion Production in Carbon-Carbon Collisions

NUCLEAR REACTIONS 12C(12C, π0), E=20-100 MeV/nucleon; calculated pion production σ(E), spectral distribution. Particle-hole theory, coherent isobar formation, decay.

doi: 10.1103/PhysRevLett.55.681
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1985TO05      Can.J.Phys. 63, 135 (1985)

L.W.Townsend, J.W.Wilson, J.W.Norbury

A Simplified Optical Model Description of Heavy-Ion Fragmentation

NUCLEAR REACTIONS 12C(40Ar, X), E=213 MeV/nucleon; calculated production σ(A) for X=S, P, Si, Al. Abrasion-ablation fragmentation model.

doi: 10.1139/p85-021
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1984TO03      Nucl.Phys. A415, 520 (1984)

L.W.Townsend, P.A.Deutchman, R.L.Madigan, J.W.Norbury

Pion Production via Isobar Giant Resonance Formation and Decay

NUCLEAR REACTIONS 12C(16O, π+), (16O, π-), (16O, π0), E=1 GeV/nucleon; 23Na, 19F(20Ne, π+), (20Ne, π-), (20Ne, π0), E=400 MeV/nucleon; 12C(12C, π+), (12C, π-), (12C, π0), E=85 MeV/nucleon; calculated pion production σ; deduced isobar giant resonance decay role. Spin, isospin formalism.

doi: 10.1016/0375-9474(84)90316-6
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1983BI01      J.Phys.(London) G9, L17 (1983)

H.B.Bidasaria, L.W.Townsend, J.W.Wilson

Theory of Carbon-Carbon Scattering from 200 to 290 MeV

NUCLEAR REACTIONS 12C(12C, 12C), (12C, X), E=204.2, 242.7, 288.6 MeV; calculated σ(θ), σ(total), σ(reaction). Optical model, folded potentials, WKB solutions.

doi: 10.1088/0305-4616/9/1/004
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1983BI12      Can.J.Phys. 61, 1660 (1983)

H.B.Bidasaria, L.W.Townsend

Microscopic Optical Potential Analyses of Carbon-Carbon Elastic Scattering

NUCLEAR REACTIONS 12C(12C, 12C), E=200-300 MeV; analyzed σ(E), σ(θ). Microscopic double-folding eikonal phase shifts.

doi: 10.1139/p83-218
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Note: The following list of authors and aliases matches the search parameter L.W.Townsend: , L.W.TOWNSEND