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Search: Author = R.R.Johnson

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2001AM01      Nucl.Phys. A684, 386c (2001)

A.Ambardar, F.Duncan, A.Feltham, G.Hofman, R.R.Johnson, G.Jones, J.B.Lange, M.Pavan, K.J.Raywood, D.Vetterli, J.T.Brack, D.Ottewell, G.R.Smith, M.E.Sevior

Measurement of π p → ππ n Cross-Sections Near Threshold

NUCLEAR REACTIONS ¹H(π^-, π⁺π^-), (π⁺, 2π⁺), E=176-200 MeV; measured σ; deduced reaction matrix elements, scattering lengths.

doi: 10.1016/S0375-9474(01)00403-1
Citations: PlumX Metrics

2000LA03      Phys.Rev. C61, 025201 (2000)

J.B.Lange, A.Ambardar, F.Duncan, A.Feltham, G.Hofman, R.R.Johnson, G.Jones, M.Pavan, K.J.Raywood, D.Vetterli, J.T.Brack, D.Ottewell, G.R.Smith, M.E.Sevior

Determination of the π^±p → π^±π⁺n Cross Section Near Threshold

NUCLEAR REACTIONS ¹H(π^-, π⁺π^-), E=176-200 MeV; ¹H(π⁺, 2π⁺), E=184, 200 MeV; measured total σ; deduced reaction matrix elements, scattering lengths. Heavy baryon chiral perturbation theory. Comparisons with previous results.

doi: 10.1103/PhysRevC.61.025201
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1998KE06      Phys.Rev. C58, 3419 (1998)

M.Kermani, P.A.Amaudruz, F.Bonutti, J.T.Brack, P.Camerini, L.Felawka, E.Fragiacomo, E.F.Gibson, N.Grion, G.J.Hofman, R.R.Johnson, E.L.Mathie, S.McFarland, R.Meier, D.Ottewell, K.J.Raywood, R.Rui, M.E.Sevior, G.R.Smith, R.Tacik, and the CHAOS Collaboration

Exclusive Measurements of π^±p → π⁺π^±n Near Threshold

NUCLEAR REACTIONS ¹H(π^-, π^-π⁺), (π⁺, 2π⁺), E=223, 243, 264, 284, 305 MeV; measured σ(θ(1)-θ(2)), σ(m²), σ(t), total σ; deduced model parameters.

doi: 10.1103/PhysRevC.58.3419
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1998LA01      Phys.Rev.Lett. 80, 1597 (1998)

J.B.Lange, F.Duncan, A.Ambardar, A.Feltham, G.Hofman, R.R.Johnson, G.Jones, M.Pavan, K.J.Raywood, D.Vetterli, J.T.Brack, D.Ottewell, G.R.Smith, M.E.Sevior

Determination of the π± p → π±π⁺n Cross Section Near Threshold

NUCLEAR REACTIONS ¹H(π^-, nπ⁺π^-), (π⁺, n2π⁺), E = 180-200 MeV; measured σ; deduced matrix elements, pion-pion scattering lengths.

doi: 10.1103/PhysRevLett.80.1597
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1996HA04      Phys.Rev. C53, 1074 (1996)

H.Hahn, A.Altman, D.Ashery, G.Gefen, D.R.Gill, R.R.Johnson, R.Levy-Nathansohn, M.A.Moinester, M.Sevior, R.P.Trelle

Pion Absorption on ³He at Low Energies

NUCLEAR REACTIONS ³He(π⁺, 2p), (π^-, np), E=37 MeV; measured (nucleon)(nucleon)-coin; deduced two, three-nucleon, final state interaction components contributions.

doi: 10.1103/PhysRevC.53.1074
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1994KO06      Phys.Rev. C49, 1715 (1994)

M.Kohler, B.E.King, N.R.Stevenson, R.B.Schubank, Y.M.Shin, R.A.Ristinen, P.Amaudruz, P.P.J.Delheij, D.C.Healey, B.K.Jennings, D.F.Ottewell, G.Sheffer, G.R.Smith, G.D.Wait, J.T.Brack, A.Feltham, M.Hanna, R.R.Johnson, F.M.Rozon, V.Sossi, D.Vetterli, P.Weber, N.Grion, R.Rui, E.L.Mathie, R.Tacik, M.Yeomans, C.A.Gossett, G.J.Wagner, J.M.Lee, K.S.Chung

Vector Analyzing Power iT₁₁ in πd Elastic Scattering at 49 MeV

NUCLEAR REACTIONS ²H(π⁺, π⁺), (π^-, π^-), E=49 MeV; measured iT₁₁(θ); deduced πNP₁₁ amplitude role. Model comparison. Dynamically polarized target, magnetic spectrometer.

doi: 10.1103/PhysRevC.49.1715
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1993FR02      Phys.Lett. 302B, 18 (1993)

E.Friedman, M.Paul, M.Schechter, A.Altman, B.K.Jennings, G.J.Wagner, N.Fazel, R.R.Johnson, N.Suen, Z.Fraenkel

Integral Cross Sections for π^-p Interaction in the 3, 3 Resonance Region

NUCLEAR REACTIONS ¹H(π^-, X), E=126-202 MeV; measured total, single charge exchange σ. Model comparison.

doi: 10.1016/0370-2693(93)90629-V
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0749.

1993SE10      Phys.Rev. D48, 3987 (1993)

M.E.Sevior, A.Ambardar, J.T.Brack, P.Camerini, F.Duncan, J.Ernst, A.Feltham, N.Grion, R.R.Johnson, G.Koch, O.Meirav, D.F.Ottewell, R.Rui, G.R.Smith, V.Sossi, D.Theis, D.Vetterli

Experimental Study of the Near Threshold π⁺p → π⁺π⁺n Cross Section and Chiral Symmetry

NUCLEAR REACTIONS ¹H(π⁺, 2π⁺), E=180-200 MeV; measured σ(E); deduced ππ-amplitude, scattering length. Quark loop anomalies dominance model.

doi: 10.1103/PhysRevD.48.3987
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1993SO01      Phys.Lett. 298B, 287 (1993)

V.Sossi, N.Fazel, R.R.Johnson, M.J.Vicente-Vacas

¹H(π, 2π) Cross Sections with ππ Scattering Derived from Chiral Lagrangians

NUCLEAR REACTIONS ¹H(π⁺, 2π⁺), (π^-, π^-π⁰), (π⁺, π⁺π⁰), E ≈ 180-370 MeV; calculated σ(E). Isobar model, ππ-scattering from chiral Lagrangians.

doi: 10.1016/0370-2693(93)91822-5
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1992BR02      Phys.Rev. C45, 698 (1992)

J.T.Brack, A.Feltham, R.R.Johnson, G.Jones, M.A.Kermani, O.Meirav, M.Pavan, M.E.Sevior, V.Sossi, D.Vetterli, P.Weber, G.R.Smith, P.A.Amaudruz, D.Healey, D.F.Ottewell, Y.S.Wu, X.Y.Chen, S.Hoibraten, M.D.Kohler, J.J.Kraushaar, R.A.Ristinen, W.R.Smythe, E.L.Mathie, D.M.Yeomans, R.Schubank, N.R.Stevenson, E.F.Gibson

Analyzing Powers for π±-¹³C(pol) Scattering at T(π) = 100 MeV

NUCLEAR REACTIONS ¹³C(π⁺, π⁺), (π^-, π^-), (π⁺, π⁺'), (π^-, π^-'), E=100 MeV; measured analyzing power. Polarized target. Model analysis.

doi: 10.1103/PhysRevC.45.698
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1992KR11      Phys.Rev. C46, 655 (1992)

R.A.Krauss, J.Alster, D.Ashery, S.Bart, R.E.Chrien, J.C.Hiebert, R.R.Johnson, T.Kishimoto, I.Mardor, Y.Mardor, M.A.Moinester, R.Olshevsky, E.Piasetzky, P.H.Pile, R.Sawafta, R.L.Stearns, R.J.Sutter, R.Weiss, A.I.Yavin

K⁺ Total Cross Sections on ¹²C and Medium Effects in Nuclei

NUCLEAR REACTIONS ¹²C, ²H(K⁺, X), E at 450-740 MeV/c; measured σ; deduced σ ratio, nuclear medium effects role.

doi: 10.1103/PhysRevC.46.655
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1992ME13      Appl.Radiat.Isot. 43, 1420 (1992)

O.Meirav, M.Adam, E.Boaretto, S.A.Dias, R.R.Johnson, M.Paul, E.Venczel

Measurements of ¹²⁹I in a Nuclear Power Reactor by Accelerator Mass Spectrometry

doi: 10.1016/0883-2889(92)90020-F
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1992SO16      Nucl.Phys. A548, 562 (1992)

V.Sossi, M.J.Iqbal, R.R.Johnson, G.Jones, M.Pavan, F.M.Rozon, M.Sevior, D.Vetterli, P.Weber, G.Sheffer, G.R.Smith, P.Camerini, N.Grion, R.Rui, N.R.Stevenson, M.J.Vicente-Vacas

Pion-Induced Pion Production on Deuterium: A quasifree process

NUCLEAR REACTIONS ²H(π⁺, π^-), E=280 MeV; measured σ(θ(π⁺), θ(π^-), E(π⁺), E(π^-)). Comparison with isobar model with Fermi motion.

doi: 10.1016/0375-9474(92)90642-W
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1992VE04      Nucl.Phys. A548, 541 (1992)

D.Vetterli, R.R.Johnson, O.Meirav, M.E.Sevior, V.Sossi, P.Weber, P.Camerini, N.Grion, R.Rui, F.M.Rozon, P.Amaudruz, D.Ottewell, G.Sheffer, G.R.Smith, N.R.Stevenson, M.J.Vicente-Vacas

π⁺π^- Coincidence Measurement in the ⁴He(π⁺, π⁺π^-) Reaction at T(π⁺) = 280 MeV

NUCLEAR REACTIONS ⁴He(π⁺, π⁺π^-), E=280 MeV; measured σ(θπ⁺, θπ^-, Eπ⁺, Eπ^-); deduced σ.

doi: 10.1016/0375-9474(92)90641-V
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1991FR01      Phys.Lett. 254B, 40 (1991)

E.Friedman, A.Goldring, R.R.Johnson, D.Vetterli, J.Jaki, M.Metzler, B.K.Jennings

Integral Cross Sections for π⁺p Interaction in the 3, 3 Resonance Region

NUCLEAR REACTIONS ¹H(π⁺, π⁺), E=125.9-201.7 MeV; measured σ. Transmission method. Phase shift calculations.

doi: 10.1016/0370-2693(91)90392-4
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1991FR04      Phys.Lett. 257B, 17 (1991)

E.Friedman, A.Goldring, R.R.Johnson, O.Meirav, D.Vetterli, P.Weber, A.Altman

Total Reaction Cross Sections for 20-30 MeV Pions and the Anomaly of Pionic Atoms

NUCLEAR REACTIONS C, Ni(π^-, X), E=20, 30 MeV; C, Ni(π⁺, X), E=30 MeV; measured reaction σ. Different potentials in model analyses.

doi: 10.1016/0370-2693(91)90850-P
Citations: PlumX Metrics

1991KR06      Europhys.Lett. 15, 11 (1991)

S.Krell, B.M.Barnett, H.Clement, J.Jaki, R.R.Johnson, C.Joram, W.Kluge, H.Matthay, M.Metzler, D.Renker, G.J.Wagner

Precision Measurements of Low-Energy Pion Scattering on Sulphur Isotopes

NUCLEAR REACTIONS ^32,34S(π⁺, π⁺), (π⁺, π⁺'), (π^-, π^-'), (π^-, π^-), E=50 MeV; measured σ(θ). ^32,34S deduced neutron rms radii difference. High precision. DWIA with, without Coulomb excitation.

doi: 10.1209/0295-5075/15/1/003
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1991SE07      Phys.Rev.Lett. 66, 2569 (1991)

M.E.Sevior, A.Ambardar, J.T.Brack, P.Camerini, F.Duncan, J.Ernst, A.Feltham, N.Grion, R.R.Johnson, G.Koch, O.Meirav, D.F.Ottewell, R.Rui, G.R.Smith, V.Sossi, D.Theis, D.Vetterli

Measurement of the Near-Threshold H(π⁺, π⁺π⁺)n Cross Section and Chiral Symmetry

NUCLEAR REACTIONS ¹H(π⁺, 2π⁺), E=180-200 MeV; measured σ(E); deduced ππ scattering length. Chiral pertubation theory, quark loop anomalies dominance.

doi: 10.1103/PhysRevLett.66.2569
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1991WE04      Phys.Rev. C43, 1553 (1991)

P.Weber, J.McAlister, R.Olszewski, A.Feltham, M.Hanna, R.R.Johnson, M.Pavan, C.Ponting, F.M.Rozon, M.Sevior, V.Sossi, D.Vetterli, D.Humphrey, G.J.Lolos, Z.Papandreou, R.Tacik, D.Ottewell, G.Sheffer, G.R.Smith, Y.Mardor, S.May-Tal

Multinucleon Pion Absorption in the ⁴He(π⁺, ppp)n Reaction

NUCLEAR REACTIONS ⁴He(π⁺, 3p), E=165 MeV; measured σ(θp₁, θp₂, θp₃), missing momentum distributions, energy spectra; deduced 3p emission, pion absorption mechanism.

doi: 10.1103/PhysRevC.43.1553
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1990FR09      Nucl.Phys. A514, 601 (1990)

E.Friedman, A.Goldring, G.J.Wagner, A.Altman, R.R.Johnson, O.Meirav, B.K.Jennings

Integral Cross Sections for π⁺p Interactions at Low Energies

NUCLEAR REACTIONS ¹H(π⁺, π⁺), E=45-126 MeV; measured σ. Beam attenuation technique.

doi: 10.1016/0375-9474(90)90012-B
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1990JA05      Phys.Lett. 238B, 36 (1990)

J.Jaki, B.M.Barnett, H.Clement, W.Gyles, R.R.Johnson, Ch.Joram, W.Kluge, S.Krell, H.Matthay, M.Metzler, D.Renker, R.Tacik, G.J.Wagner, C.A.Wiedner, U.Wiedner

Isospin Mixing of the 1⁺ Doublet in ¹²C Determined by Low-Energy Pion Scattering

NUCLEAR REACTIONS ¹²C(π⁺, π⁺'), (π^-, π^-'), (π⁺, π⁺), (π^-, π^-), E=50 MeV; measured σ(θ). ¹²C levels deduced isospin mixing features.

doi: 10.1016/0370-2693(90)92096-2
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1990MA70      Phys.Rev.Lett. 65, 2110 (1990)

Y.Mardor, E.Piasetzky, J.Alster, D.Ashery, M.A.Moinester, A.I.Yavin, S.Bart, R.E.Chrien, P.H.Pile, R.J.Sutter, R.A.Krauss, J.C.Hiebert, R.L.Stearns, T.Kishimoto, R.R.Johnson, R.Olshevsky

K⁺ Total Cross Sections as a Test for Nucleon ' Swelling '

NUCLEAR REACTIONS C, ²H(K⁺, X), E at 450-740 MeV/c; measured σ, ratios.

doi: 10.1103/PhysRevLett.65.2110
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1990ME11      Phys.Rev. C42, 2222 (1990)

R.Meier, E.T.Boschitz, S.Ritt, R.Tacik, M.Wessler, J.A.Konter, S.Mango, D.Renker, B.van den Brandt, W.Meyer, W.Thiel, R.Mach, P.Amaudruz, R.R.Johnson, G.R.Smith, P.Weber

Pion Scattering from Polarized ¹⁵N at T(π) = 164 MeV

NUCLEAR REACTIONS ¹⁵N(π⁺, π⁺), (π⁺, π⁺'), E=164 MeV; measured σ(E(π)), σ(θ), analyzing power vs θ. Polarized ¹⁵NH₃ target. Momentum space coupled-channels formalism.

doi: 10.1103/PhysRevC.42.2222
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1990RU04      Nucl.Phys. A508, 551c (1990)

R.Rui, P.Camerini, N.Grion, R.R.Johnson, V.Sossi, M.J.Vicente-Vacas

The (π, 2π) Reaction on Few Body Systems

NUCLEAR REACTIONS ²H(π⁺, π⁺π^-), E at 395 MeV/c; measured σ(θ(π⁺), E(π⁺), θ(π^-), E(π⁺)); deduced chiral symmetry breaking parameters. Model comprison.

doi: 10.1016/0375-9474(90)90517-P
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1990RU09      Nucl.Phys. A517, 455 (1990)

R.Rui, P.Camerini, N.Grion, R.R.Johnson, M.Pavan, F.M.Rozon, V.Sossi, D.Ottewell, G.Sheffer, G.Smith, N.R.Stevenson, M.J.Vicente-Vacas

π⁺π^- Coincidence Measurement in the π⁺d → π⁺π^-pp Reaction at Tπ⁺ = 280 MeV

NUCLEAR REACTIONS ²H(π⁺, π⁺π^-), E=280 MeV; measured σ(θπ⁺, θπ^-, Eπ⁺, Eπ^-); deduced σ.

doi: 10.1016/0375-9474(90)90211-4
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1990ST24      Phys.Rev.Lett. 65, 1987 (1990)

N.R.Stevenson, R.B.Schubank, Y.M.Shin, P.Amaudruz, P.P.J.Delheij, D.C.Healey, B.K.Jennings, D.F.Ottewell, G.Sheffer, G.R.Smith, G.D.Wait, J.T.Brack, A.Feltham, M.Hanna, R.R.Johnson, F.M.Rozon, V.Sossi, D.Vetterli, P.Weber, N.Grion, R.Rui, M.Kohler, R.A.Ristinen, E.L.Mathie, R.Tacik, M.Yeomans, C.A.Gossett, G.J.Wagner

Role of the πN P₁₁ Interaction in πd Elastic Scattering at 50 MeV

NUCLEAR REACTIONS ²H(π⁺, π⁺), E=50 MeV; measured iT₁₁(θ); deduced πN(P₁₁) interaction amplitude role. Dynamically polarized target.

doi: 10.1103/PhysRevLett.65.1987
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1990ST33      J.Phys.(Paris), Colloq.C-6, 391 (1990)

N.R.Stevenson, R.B.Schubank, Y.M.Shin, P.Amaudruz, P.P.J.Delheij, D.C.Healey, B.K.Jennings, D.F.Ottewell, G.Sheffer, G.R.Smith, G.D.Wait, N.Grion, R.Rui, J.T.Brack, A.Feltham, M.Hanna, R.R.Johnson, F.M.Rozon, V.Sossi, D.Vetterli, P.Weber, M.Kohler, R.A.Ristinen, E.L.Mathie, R.Tacik, M.Yeomans, C.A.Gossett, G.J.Wagner, B.E.King

Analyzing Power Measurements in πd Elastic Scattering at 50 MeV

NUCLEAR REACTIONS ²H(π, π), E=50 MeV; measured iT₁₁(θ); deduced πN(P₁₁) potential role.

1990TA25      Phys.Rev. C42, 1846 (1990)

R.Tacik, E.T.Boschitz, W.Gyles, C.R.Ottermann, M.Wessler, U.Wiedner, H.Garcilazo, R.R.Johnson

Kinematically Complete Measurement of the π⁺d → π⁰pp Charge-Exchange Reaction

NUCLEAR REACTIONS ²H(π⁺, π⁰p), E=228, 294 MeV; measured σ(θp₁, θp₂) vs proton momentum. Relativistic Faddeev formalism.

doi: 10.1103/PhysRevC.42.1846
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1989FR11      Phys.Lett. 231B, 39 (1989)

E.Friedman, A.Goldring, G.J.Wagner, A.Altman, R.R.Johnson, O.Meirav, M.Hanna, B.K.Jennings

Integral Cross Sections for π⁺p Scattering between 52 and 126 MeV

NUCLEAR REACTIONS ¹H(π⁺, π⁺), E=52-126 MeV; measured σ(E). Model comparison.

doi: 10.1016/0370-2693(89)90109-3
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1989GR05      Nucl.Phys. A492, 509 (1989)

N.Grion, R.Rui, F.M.Rozon, M.Hanna, R.R.Johnson, J.McAlister, R.Olszewski, C.Ponting, M.E.Sevior, V.Sossi, D.R.Gill, G.Sheffer, M.J.Vincente-Vacas, E.Oset

Pion Production by Pions in the ¹⁶O(π⁺, π⁺π^-) Reaction at T(π)⁺ = 280 MeV

NUCLEAR REACTIONS ¹⁶O(π⁺, π⁺π^-), E=280 MeV; measured σ(θ(π)⁺, θ(π)^-, Eπ⁺, Eπ^-); deduced σ, missing mass.

doi: 10.1016/0375-9474(89)90107-3
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1989ME07      Phys.Rev. C40, 843 (1989)

O.Meirav, E.Friedman, R.R.Johnson, R.Olszewski, P.Weber

Low Energy Pion-Nucleus Potentials from Differential and Integral Data

NUCLEAR REACTIONS Si, Ni(π⁺, X), (π^-, X), E=50 MeV; Ni(π^-, X), (π⁺, X), E=65 MeV; C, Ca, Zr, Pb(π⁺, X), (π^-, X), E=80 MeV; measured reaction σ; deduced model parmeters. Analysis of other data.

doi: 10.1103/PhysRevC.40.843
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1989PO11      Phys.Rev.Lett. 63, 1792 (1989)

C.Ponting, D.A.Hutcheon, M.A.Moinester, P.L.Walden, D.R.Gill, R.R.Johnson, F.Duncan, G.Sheffer, P.Weber, V.Sossi, A.Feltham, M.Hanna, R.Olszewski, M.Pavan, F.M.Rozon, M.Sevior, D.Ashery, R.P.Trelle, H.Hahn, B.Mayer

Analyzing-Power Measurement in p(pol)n → π^-pp(¹S₀): Pion absorption by quark clusters ( Question )

NUCLEAR REACTIONS ²H(polarized p, 2pπ^-), E=400 MeV; measured analyzing power vs (θ(π)); deduced nucleon-nucleon interaction short range component role.

doi: 10.1103/PhysRevLett.63.1792
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1989TA14      Phys.Rev. C40, 256 (1989)

R.Tacik, E.T.Boschitz, W.Gyles, W.List, C.R.Ottermann, M.Wessler, U.Wiedner, R.R.Johnson

Three-Nucleon Pion Absorption in Carbon

NUCLEAR REACTIONS ¹²C(π⁺, 3p), E=130, 180, 228 MeV; measured σ(θ₁, θ₂, θ₃); deduced absorption σ.

doi: 10.1103/PhysRevC.40.256
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1989TA21      Phys.Rev.Lett. 63, 1784 (1989)

R.Tacik, E.T.Boschitz, R.Meier, S.Ritt, M.Wessler, K.Junker, J.A.Konter, S.Mango, D.Renker, B.van den Brandt, W.Meyer, W.Thiel, P.Chaumette, J.Deregel, G.Durand, J.Fabre, P.Amaudruz, R.R.Johnson, G.Smith, P.Weber, R.Mach

Spin Effects in π-Nucleus Scattering in the Region of the Δ(3, 3) Resonance

NUCLEAR REACTIONS ¹⁵N(π⁺, π⁺), (π⁺, π⁺'), E=164 MeV; ⁶Li(π⁺, π⁺), (π⁺, π⁺'), E=134, 164 MeV; measured σ(θ), vector, tensor analyzing power vs θ. Polarized targets.

doi: 10.1103/PhysRevLett.63.1784
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1989WE11      Phys.Lett. 230B, 31 (1989)

P.Weber, J.McAlister, R.Olszewski, A.Feltham, M.Hanna, D.Humphrey, R.R.Johnson, G.J.Lolos, Y.Mardor, S.May-Tal, D.Ottewell, Z.Papandreou, M.Pavan, C.Ponting, F.M.Rozon, M.Sevior, G.Sheffer, G.R.Smith, V.Sossi, R.Tacik, D.Vetterli

Multi-Nucleon Pion Absorption in the ⁴He(π⁺, ppp)n Reaction

NUCLEAR REACTIONS ⁴He(π⁺, 3p), E=165 MeV; measured proton triple coincidences, σ(θ); deduced pion absorption mechanism. Kinematically complete experiment.

doi: 10.1016/0370-2693(89)91648-1
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1989WE14      Phys.Lett. 233B, 281 (1989)

P.Weber, J.McAlister, R.Olszewski, A.Feltham, M.Hanna, D.Humphrey, R.R.Johnson, G.J.Lolos, Y.Mardor, S.May-Tal, D.Ottewell, Z.Papandreou, M.Pavan, C.Ponting, F.M.Rozon, M.Sevior, G.Sheffer, G.R.Smith, V.Sossi, R.Tacik, D.Vetterli

Multi-Nucleon Pion Absorption in the ⁴He(π⁺, ppp)n Reaction

NUCLEAR REACTIONS ⁴He(π⁺, 3p), E=165 MeV; measured σ(θ₁, θ₂, θ₃); deduced pion absorption mechanism. Kinematically complete experiment.

doi: 10.1016/0370-2693(89)91310-5
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1988LI08      Phys.Rev. C37, 1587 (1988)

W.List, E.T.Boschitz, H.Garcilazo, W.Gyles, C.R.Ottermann, R.Tacik, M.Wessler, U.Wiedner, R.R.Johnson

Neutron-Proton Final-State Interaction in πd Breakup: Differential cross section

NUCLEAR REACTIONS ²H(π⁺, np), E=294 MeV; measured σ(θ(π), θp) vs proton momentum; deduced np-final state interaction role. Kinematically complete experiment.

doi: 10.1103/PhysRevC.37.1587
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1988SM04      Phys.Rev. C38, 240 (1988)

G.R.Smith, D.R.Gill, D.Ottewell, G.D.Wait, P.Walden, R.R.Johnson, R.Olszewski, R.Rui, M.E.Sevior, R.P.Trelle, J.Brack, J.J.Kraushaar, R.A.Ristinen, H.Chase, E.L.Mathie, V.Pafilis, R.B.Schubank, N.R.Stevenson, A.Rinat, Y.Alexander

Energy Dependence of the Charge Asymmetry A(T(π), θ) in πd Elastic Scattering

NUCLEAR REACTIONS ²H(π⁺, π⁺), (π^-, π^-), E=143-256 MeV; measured charge asymmetry vs E, θ; deduced Δ-isobar parameters.

doi: 10.1103/PhysRevC.38.240
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1988SM05      Phys.Rev. C38, 251 (1988)

G.R.Smith, D.R.Gill, D.Healey, D.Ottewell, G.D.Wait, P.Walden, R.R.Johnson, G.Jones, R.Olszewski, F.M.Rozon, R.Rui, M.E.Sevior, R.P.Trelle, E.L.Mathie, G.Lolos, S.I.H.Naqvi, V.Pafilis, N.R.Stevenson, R.B.Schubank, W.Gyles, C.R.Ottermann, G.S.Kyle

Energy Dependence of T₂₀ and τ₂₁ in πd(pol) Elastic Scattering

NUCLEAR REACTIONS ²H(π, π), E=134-256 MeV; measured tensor analyzing power vs θ; deduced pion absorption role. Tensor polarized target.

doi: 10.1103/PhysRevC.38.251
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1987GR23      Phys.Rev.Lett. 59, 1080 (1987)

N.Grion, R.Rui, F.M.Rozon, T.Anderl, J.Ernst, D.R.Gill, M.Hanna, J.J.Kraushaar, R.R.Johnson, R.Olszewski, M.E.Sevior, G.Sheffer, G.R.Smith, R.P.Trelle, Z.Wu

Measurement of the ¹⁶O(π⁺, π⁺π^-) Reaction at T(π⁺) = 280 MeV

NUCLEAR REACTIONS ¹⁶O(π⁺, π⁺π^-), E=280 MeV; measured σ(E(π⁺), θ(π⁺), θ(π^-)), σ(E(π⁺)). Tof.

doi: 10.1103/PhysRevLett.59.1080
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1987ME12      Phys.Rev. C36, 1066 (1987)

O.Meirav, E.Friedman, A.Altman, M.Hanna, R.R.Johnson, D.R.Gill

Total Reaction Cross Sections of 50 and 65 MeV Pions on Nuclei

NUCLEAR REACTIONS C, O, ¹⁸O, S, Ca, Zr(π⁺, X), (π^-, X), E=50, 65 MeV; measured reaction σ. Ca(π^-, π^-), E=50 MeV; measured σ(θ); deduced elastic corrections.

doi: 10.1103/PhysRevC.36.1066
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1987ME20      Phys.Lett. 199B, 9 (1987)

O.Meirav, E.Friedman, A.Altman, M.Hanna, R.R.Johnson, D.R.Gill

Pion-Nucleus Potentials in the Energy Range of 0-80 MeV

NUCLEAR REACTIONS ⁶⁴Ni, ⁴⁰Ca, ⁹⁰Zr(π⁺, π⁺), (π^-, π^-), E=65, 80 MeV; ²⁰⁸Pb(π⁺, π⁺), (π^-, π^-), E=30, 80 MeV; calculated σ(θ); deduced potential parameters. Optical model.

doi: 10.1016/0370-2693(87)91453-5
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1987SM02      Nucl.Instrum.Methods Phys.Res. A254, 263 (1987)

G.R.Smith, P.Delheij, D.R.Gill, D.Healey, D.Ottewell, G.D.Wait, P.Walden, R.R.Johnson, G.Jones, F.M.Rozon, M.Sevior, F.Tervisidis, R.P.Trelle, E.L.Mathie, S.I.H.Naqvi, G.J.Lolos, C.R.Otterman, E.T.Boschitz, G.S.Kyle, P.A.Amaudruz

Direct Measurement of the Tensor Polarization of a Polarized Deuteron Target

NUCLEAR MOMENTS ²H; measured NMR; deduced vector polarization. Polarized target, ²H(π, 2p) data input.

doi: 10.1016/0168-9002(87)90673-5
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1987SM04      Phys.Rev. C35, 2343 (1987)

G.R.Smith, D.R.Gill, D.Healey, D.Ottewell, G.D.Wait, P.Walden, R.R.Johnson, G.Jones, R.Olszewski, F.M.Rozon, R.Rui, M.E.Sevior, R.P.Trelle, E.L.Mathie, G.J.Lolos, C.R.Ottermann, W.Gyles, G.S.Kyle

Measurement of the Tensor Analyzing Power T₂₁ in πd Elastic Scattering

NUCLEAR REACTIONS ²H(π, π), E=180 MeV; measured σ(Ed), T₂₁(θ). Polarized target. Faddeev calculations.

doi: 10.1103/PhysRevC.35.2343
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1987WI01      Phys.Rev. C35, 708 (1987)

U.Wienands, N.Hessey, B.M.Barnett, F.M.Rozon, H.W.Roser, A.Altman, R.R.Johnson, D.R.Gill, G.R.Smith, C.A.Wiedner, D.M.Manley, B.L.Berman, H.J.Crawford, N.Grion

Elastic and Inelastic Scattering of 50-MeV Pions from ²⁸Si and ³⁰Si

NUCLEAR REACTIONS ^28,30Si(π⁺, π⁺), (π⁺, π⁺'), (π^-, π^-), (π^-, π^-'), E=50 MeV; measured σ(θ); deduced model parameters. ^28,30Si levels deduced neutron, proton transition matrix element ratio. Enriched targets. Optical model analyses.

doi: 10.1103/PhysRevC.35.708
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1986AN11      Phys.Rev. C33, 1714 (1986)

K.A.Aniol, A.Altman, R.R.Johnson, H.W.Roser, R.Tacik, U.Wienands, D.Ashery, J.Alster, M.A.Moinester, E.Piasetzky, D.R.Gill, J.Vincent

Pion Absorption of ³He at T(π) = 62.5 and 82.8 MeV

NUCLEAR REACTIONS ³He(π⁺, pn), (π^-, pn), E=62.5, 82.8 MeV; measured σ(Ep, θp). ³He(π^-, n), E=62.5, 82.8 MeV; measured breakup σ; deduced three-body absorption σ, reaction mechanism.

doi: 10.1103/PhysRevC.33.1714
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1986BR29      Phys.Rev. C34, 1771 (1986)

J.T.Brack, J.J.Kraushaar, J.H.Mitchell, R.J.Peterson, R.A.Ristinen, J.L.Ullmann, D.R.Gill, R.R.Johnson, D.Ottewell, F.M.Rozon, M.E.Sevior, G.R.Smith, F.Tervisidis, R.P.Trelle, E.L.Mathie

πp Elastic Scattering from 67 to 139 MeV

NUCLEAR REACTIONS ¹H(π⁺, π⁺), (π^-, π^-), E=66.8-138.8 MeV; measured σ(θ).

doi: 10.1103/PhysRevC.34.1771
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1986GY01      Phys.Rev. C33, 583 (1986)

W.Gyles, E.T.Boschitz, H.Garcilazo, W.List, E.L.Mathie, C.R.Ottermann, G.R.Smith, R.Tacik, R.R.Johnson

π⁺d → π⁺pn Reaction as a Test of Relativistic Faddeev Theories: Differential cross section

NUCLEAR REACTIONS ²H(π⁺, π⁺p), E=228, 294 MeV; measured σ(θπ, θp) vs proton momentum; deduced nonconventional dynamics insignificance. Faddeev method.

doi: 10.1103/PhysRevC.33.583
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1986GY02      Phys.Rev. C33, 595 (1986)

W.Gyles, E.T.Boschitz, H.Garcilazo, E.L.Mathie, C.R.Ottermann, G.R.Smith, S.Mango, J.A.Konter, R.R.Johnson

π⁺d → π⁺pn Reaction as a Test of Relativistic Faddeev Theories: Vector analyzing power

NUCLEAR REACTIONS ²H(π⁺, π⁺p), E=180, 228, 294 MeV; measured vector analysing power iT₁₁(θπ, θp), σ(θπ, θp) vs proton momentum. Relativistic Faddeev method.

doi: 10.1103/PhysRevC.33.595
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1986SM06      Phys.Rev.Lett. 57, 803 (1986)

G.R.Smith, A.Altman, P.Delheij, D.R.Gill, D.Healey, R.R.Johnson, G.Jones, D.Ottewell, F.M.Rozon, M.E.Sevior, F.Tervisidis, R.P.Trelle, G.D.Wait, P.Walden, E.L.Mathie, G.J.Lolos, S.I.H.Naqvi, E.T.Boschitz, C.R.Ottermann, G.S.Kyle, P.A.Amaudruz

Tensor Analyzing Power in πd Elastic Scattering

NUCLEAR REACTIONS ²H(π, π), E=138, 150.9 MeV; measured tensor analyzing power vs θ. Tensor polarized target. Faddeev calculations.

doi: 10.1103/PhysRevLett.57.803
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1985AL15      Phys.Rev.Lett. 55, 1273 (1985)

A.Altman, R.R.Johnson, U.Wienands, N.Hessey, B.M.Barnett, B.M.Forster, N.Grion, D.Mills, F.M.Rozon, G.R.Smith, R.P.Trelle, D.R.Gill, G.Sheffer, T.Anderl

Observation of the Double Isobaric Analog Transition ¹⁸O(π⁺, π^-)¹⁸Ne at 50 MeV

NUCLEAR REACTIONS ¹⁸O(π⁺, π^-), E=50 MeV; measured σ(θ). ¹⁸Ne deduced double IAS excitation. Six-quark bag model calculations, comparison with data on ¹⁴C.

doi: 10.1103/PhysRevLett.55.1273
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1985BA27      Phys.Lett. 156B, 172 (1985)

B.M.Barnett, W.Gyles, R.R.Johnson, R.Tacik, K.L.Erdman, H.W.Roser, D.R.Gill, E.W.Blackmore, S.Martin, C.A.Wiedner, R.J.Sobie, T.E.Drake, J.Alster

Density Distribution Differences of Protons in ^16,18O from Ratios of π⁺ Elastic Scattering Cross Sections

NUCLEAR REACTIONS ^16,18O(π⁺, π⁺), E=48.3, 62.8 MeV; measured σ(θ), ratios. ^18,16O deduced proton density distribution differences.

doi: 10.1016/0370-2693(85)91503-5
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1985GY02      Nucl.Phys. A439, 598 (1985)

W.Gyles, B.M.Barnett, R.Tacik, K.L.Erdman, R.R.Johnson, G.J.Lolos, H.Roser, K.A.Aniol, F.Entezami, E.L.Mathie, D.R.Gill, E.W.Blackmore, C.A.Wiedner, S.Martin, R.J.Sobie, T.E.Drake

Neutron Density Difference Measurements for ^26,24Mg and ^36,34,32S using Low-Energy Pions

NUCLEAR REACTIONS ^36,34,32S(π^-, π^-), E=48.4 MeV; ^26,24Mg(π^-, π^-), E=43.9 MeV; measured σ(θ) ratios. ^36,34,32S, ^26,24Mg deduced neutron density differences.

doi: 10.1016/0375-9474(85)90329-X
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1985MA17      Phys.Lett. 154B, 28 (1985)

E.L.Mathie, G.R.Smith, E.T.Boschitz, W.Gyles, C.R.Ottermann, S.Mango, J.A.Konter, A.Matsuyama, R.R.Johnson, R.Olszewski

First Measurement of iT₁₁ in the Pion-Deuteron Breakup Reaction

NUCLEAR REACTIONS ²H(π⁺, π⁺p), E=228 MeV; measured σ(θ), iT₁₁(θ), σ(θp, θ(π)) vs proton momentum. Polarized target, kinematically complete experiment.

doi: 10.1016/0370-2693(85)91561-8
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1985OT04      Phys.Rev. C32, 928 (1985)

C.R.Ottermann, E.T.Boschitz, W.Gyles, W.List, R.Tacik, R.R.Johnson, G.R.Smith, E.L.Mathie

Large Angle πd Scattering in the Region of the (3, 3) Resonance

NUCLEAR REACTIONS ²H(π⁺, π⁺), E=124-324 MeV; measured σ(θ). Comparison with Faddeev calculation.

doi: 10.1103/PhysRevC.32.928
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1984MO03      Phys.Rev.Lett. 52, 1203 (1984)

M.A.Moinester, D.R.Gill, J.Vincent, D.Ashery, S.Levenson, J.Alster, A.Altman, J.Lichtenstadt, E.Piasetzky, K.A.Aniol, R.R.Johnson, H.W.Roser, R.Tacik, W.Gyles, B.Barnett, R.J.Sobie, H.P.Gubler

Isospin Dependence of Pion Absorption on Nucleon Pairs at T(π) = 65 MeV

NUCLEAR REACTIONS ³He(π⁺, 2p), (π^-, np), E=65 MeV; measured pp-, pn-coin, σ(θp₁, Ep₂), σ(θn, Ep); deduced σ(reaction) ratio, isospin dependence.

doi: 10.1103/PhysRevLett.52.1203
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1984SM06      Phys.Rev. C30, 980 (1984)

G.R.Smith, E.L.Mathie, E.T.Boschitz, C.R.Ottermann, W.Gyles, W.List, S.Mango, J.A.Konter, B.van den Brandt, R.Olszewski, R.R.Johnson

Vector Analyzing Power iT₁₁ in the πd → 2p Reaction between 112 and 325 MeV

NUCLEAR REACTIONS ²H(π, 2p), E=112-325 MeV; measured recoil deuteron iT₁₁(θ). Faddeev calculation comparison.

doi: 10.1103/PhysRevC.30.980
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1984SO06      Nucl.Instrum.Methods 219, 501 (1984)

R.J.Sobie, T.E.Drake, B.M.Barnett, K.L.Erdman, W.Gyles, R.R.Johnson, H.W.Roser, R.Tacik, E.W.Blackmore, D.R.Gill, S.Martin, C.A.Wiedner, T.Masterson

The TRIUMF Low Energy Pion Spectrometer and Channel

NUCLEAR REACTIONS ¹²C(π^-, π^-'), E=50 MeV; measured σ(E(π')). Low energy pion spectrometer.

doi: 10.1016/0167-5087(84)90221-7
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1984SO12      Phys.Lett. 143B, 338 (1984)

R.J.Sobie, T.E.Drake, J.Gaydos, R.R.Johnson, R.Tacik, D.R.Gill, B.K.Jennings, N.de Takacsy

Study of the Pion-Nucleus Reaction Mechanism with ¹²C(π, π'γ)

NUCLEAR REACTIONS ¹²C(π⁺, π⁺'), E=65, 90 MeV; measured σ(θ(π), θγ); deduced nuclear matter density role, pion-nuclear reaction mechanism role.

doi: 10.1016/0370-2693(84)91478-3
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1984SO13      Phys.Rev. C30, 1612 (1984)

R.J.Sobie, T.E.Drake, K.L.Erdman, R.R.Johnson, H.W.Roser, R.Tacik, E.W.Blackmore, D.R.Gill, S.Martin, C.A.Wiedner, T.Masterson

Elastic and Inelastic Scattering of 50 MeV Pions from ¹²C, ³²S, and ³⁴S

NUCLEAR REACTIONS ¹²C, ^32,34S(π⁺, π⁺), (π⁺, π⁺'), (π^-, π^-), (π^-, π^-'), E=50 MeV; measured σ(θ); deduced neutron, proton matrix elements. Optical, distorted wave model analyses.

doi: 10.1103/PhysRevC.30.1612
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1984TA03      Phys.Rev.Lett. 52, 1276 (1984)

R.Tacik, K.L.Erdman, R.R.Johnson, H.W.Roser, D.R.Gill, E.W.Blackmore, R.J.Sobie, T.E.Drake, S.Martin, C.A.Wiedner

Sensitivity of Low-Energy π± Inelastic Scattering

NUCLEAR REACTIONS ²⁶Mg(π⁺, π⁺'), (π^-, π^-'), E=50 MeV; measured σ(θ); deduced neutron, proton deformation sensitivity. ²⁶Mg level deduced neutron to proton matrix element ratio, σ(π⁺)/σ(π^-) vs (β(p)/β(n)). DWIA.

doi: 10.1103/PhysRevLett.52.1276
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1983LO10      Phys.Lett. 126B, 20 (1983)

G.J.Lolos, R.R.Johnson, P.Couvert, J.McKenna, R.Myers, I.Spadinger, P.Lorrain

Energy Dependence of the ⁶Li(π^+,3He)³He Reaction at 60, 75 and 90 MeV

NUCLEAR REACTIONS ⁶Li(π^+,3He), E=60, 75, 90 MeV; measured σ(θ) vs E. Pionic fission, cluster absorption model comparison.

doi: 10.1016/0370-2693(83)90007-2
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1983MA14      Nucl.Phys. A397, 469 (1983)

E.L.Mathie, G.Jones, T.Masterson, D.Ottewell, P.Walden, E.G.Auld, A.Haynes, R.R.Johnson

Pion Production from Hydrogen Bombarded by Polarized Protons at Intermediate Energies

NUCLEAR REACTIONS ¹H(polarized p, π⁺), E=305-425 MeV; measured σ(θ), σ(Eπ, θ), A(θ).

doi: 10.1016/0375-9474(83)90612-7
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1983NA18      Phys.Rev. C28, 2548 (1983)

I.Navon, D.Ashery, J.Alster, G.Azuelos, B.M.Barnett, W.Gyles, R.R.Johnson, D.R.Gill, T.G.Masterson

True Absorption and Scattering of 50 Mev Pions

NUCLEAR REACTIONS C, Fe, Bi(π⁺, π⁺'), (π^-, π^-'), (π⁺, X), E=50 MeV; Li, Nb(π⁺, π⁺'), (π⁺, X), E= 50 MeV; measured σ(θ), transmission; deduced σ(absorption), large σ(π^-)/σ(π⁺).

doi: 10.1103/PhysRevC.28.2548
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1982GI08      Phys.Rev. C26, 1306 (1982)

D.R.Gill, K.L.Erdman, E.W.Blackmore, W.Gyles, B.M.Barnett, C.Oram, R.R.Johnson, T.G.Masterson, N.Grion

Elastic Scattering of 13.9 MeV Positive Pions from ¹²C

NUCLEAR REACTIONS ¹²C(π⁺, π⁺), E=13.9 MeV; measured σ(θ); deduced absorption parameters. Optical model analysis.

doi: 10.1103/PhysRevC.26.1306
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1981BO01      Phys.Rev.Lett. 46, 167 (1981)

J.Bolger, E.Boschitz, G.Probstle, G.R.Smith, S.Mango, F.Vogler, R.R.Johnson, J.Arvieux

Evidence for a Dibaryon Signal in the Measurement of Elastic π⁺-d(pol) Scattering

NUCLEAR REACTIONS ²H(π⁺, π⁺), E=142, 256 Mev; measured vector analyzing power vs θ; deduced dibaryon resonance effects at high energy. Faddeev calculations at low energies. Polarized target.

doi: 10.1103/PhysRevLett.46.167
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1980AU07      Phys.Lett. 93B, 258 (1980)

E.G.Auld, R.R.Johnson, G.Jones, E.L.Mathie, P.Walden, D.Hutcheon, P.Kitching, W.C.Olsen, C.F.Perdrisat, B.Tatischeff

Differential Cross Section and Analyzing Power for Backward Pions in ²H(p, π⁺)³H

NUCLEAR REACTIONS ²H(polarized p, π⁺), E=400, 425, 443, 470 MeV; measured σ(θ), analyzing power vs θ. Two-nucleon model calculations.

doi: 10.1016/0370-2693(80)90508-0
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1980BA45      Phys.Lett. B97, 45 (1980)

B.M.Barnett, W.Gyles, R.R.Johnson, K.L.Erdman, J.Johnstone, J.J.Kraushaar, S.Lepp, T.G.Masterson, E.Rost, D.R.Gill, A.W.Thomas, J.Alster, I.Navon, R.H.Landau

Proton Radii Determinations from the Ratio of π⁺ Elastic Scattering from ¹¹B and ¹²C

NUCLEAR REACTIONS ¹²C, ¹¹B(π⁺, π⁺), E=38.6, 47.7 MeV; measured σ(θ). ¹²C, ¹¹B deduced rms charge radii differences.

doi: 10.1016/0370-2693(80)90543-2
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1980FR06      Phys.Lett. 91B, 345 (1980)

R.Frascaria, I.Brissaud, J.P.Didelez, C.Perrin, J.L.Beveridge, J.P.Egger, F.Goetz, P.Gretillat, R.R.Johnson, C.Lunke, E.Schwarz, B.M.Preedom

Search for the Dibaryon Resonance Signals in the π⁺-D Excitation Function at 180°

NUCLEAR REACTIONS ^1,2H(π⁺, π⁺), E=130-280 MeV; measured σ(E, θ), θ=180°; deduced evidence for dibaryon resonance.

doi: 10.1016/0370-2693(80)90992-2
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1980FR15      Helv.Phys.Acta 53, 293 (1980)

R.Frascaria, I.Brissaud, J.-P.Didelez, C.Perrin, J.L.Beveridge, J.-P.Egger, F.Goetz, P.Gretillat, R.R.Johnson, C.Lunke, E.Schwarz, B.M.Preedom

Search for Dibaryon Resonance Signals in the π⁺ → d Excitation Function at 180°

NUCLEAR REACTIONS ^1,2H(π⁺, π⁺), E=130-280 MeV; measured σ(E).

1980MA42      Z.Phys. A298, 149 (1980)

N.Marty, M.Morlet, A.Willis, C.Perrin, J.L.Beveridge, J.P.Egger, F.Goetz, P.Gretillat, R.R.Johnson, C.Lunke, E.Schwarz

Excitation of Isovector Giant Resonances by Inelastic Scattering of Positive Pions on ⁹⁰Zr at 226 MeV

NUCLEAR REACTIONS ⁹⁰Zr(π⁺, π⁺'), E=226 MeV; measured σ(E(π⁺'), θ). ⁹⁰Zr deduced GDR, isovector, isoscalar giant quadrupole, monopole resonances, widths. DWBA calculations.

doi: 10.1007/BF01554055
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1980MA46      Helv.Phys.Acta 53, 298 (1980)

N.Marty, M.Morlet, A.Willis, C.Perrin, J.L.Beveridge, J.-P.Egger, F.Goetz, P.Gretillat, R.R.Johnson, C.Lunke, E.Schwarz

Excitation of Giant Resonances by Inelastic Pion Scattering

NUCLEAR REACTIONS ⁹⁰Zr(π⁺, π⁺'), E=226 MeV; measured σ(E(π⁺'), θ). ⁹⁰Zr deduced T=0, 1 giant resonances.

1979AU02      Can.J.Phys. 57, 73 (1979)

E.G.Auld, D.Axen, J.Beveridge, G.Duesdieker, L.Felawka, C.H.Q.Ingram, R.R.Johnson, G.Jones, D.LePatourel, R.Orth, M.Salomon, W.Westlund, L.P.Robertson

π⁺-p Elastic Scattering at 47.9 MeV

NUCLEAR REACTIONS ¹H(π⁺, π⁺), E=47.9 MeV; measured σ(θ); deduced phase shifts.

doi: 10.1139/p79-008
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1979JO04      Can.J.Phys. 57, 775 (1979)

R.R.Johnson, T.Marks, T.G.Masterson, B.Bassalleck, K.L.Erdman, W.Gyles, D.Gill, C.Sabev

Elastic Scattering of 29 MeV Negative Pions from ²⁰⁸Pb

NUCLEAR REACTIONS ²⁰⁸Pb(π^-, π^-), E=29 MeV; measured σ(θ).

doi: 10.1139/p79-109
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1979JO08      Phys.Rev.Lett. 43, 844 (1979)

R.R.Johnson, T.Masterson, B.Bassalleck, W.Gyles, T.Marks, K.L.Erdman, A.W.Thomas, D.R.Gill, E.Rost, J.J.Kraushaar, J.Alster, C.Sabev, J.Arvieux, M.Krell

Neutron Radii Determinations from the Ratio of π- Elastic Scattering From ^12,13C and ^16,18O

NUCLEAR REACTIONS ^12,13C(π^-, π^-), E=29.2-49.5 MeV; ^16,18O(π^-, π^-), E=29.2 MeV; measured σ(θ). ¹³C, ¹⁸O deduced neutron radii relative to ¹²C, ¹⁶O. Optical model analysis.

doi: 10.1103/PhysRevLett.43.844
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1979WA03      Phys.Lett. 81B, 156 (1979)

P.Walden, D.Ottewell, E.L.Mathie, T.Masterson, G.Jones, R.R.Johnson, A.Haynes, E.G.Auld

The Polarized p + p → d + π⁺ Reaction with a Polarized Proton Beam

NUCLEAR REACTIONS ¹H(polarized p, π⁺), E=305-425 MeV; measured σ(θ), A(θ); deduced production σ for d-wave pion.

doi: 10.1016/0370-2693(79)90511-2
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1978AU07      Phys.Rev.Lett. 41, 462 (1978)

E.G.Auld, A.Haynes, R.R.Johnson, G.Jones, T.Masterson, E.L.Mathie, D.Ottewell, P.Walden, B.Tatischeff

Production of Positive Pions from the Bombardment of ⁹Be and ¹²C with 200-MeV Polarized Protons

NUCLEAR REACTIONS ⁹Be, ¹²C(polarized p, π⁺), E=200 MeV; measured σ(θ).

doi: 10.1103/PhysRevLett.41.462
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1978JO03      Nucl.Phys. A296, 444 (1978)

R.R.Johnson, T.G.Masterson, K.L.Erdman, A.W.Thomas, R.H.Landau

Elastic Scattering of Positive Pions from ¹²C at 30, 40 and 50 MeV

NUCLEAR REACTIONS ¹²C(π⁺, π⁺), E=28.4, 38.6, 48.9 MeV; measured σ(θ). Counter telescope, pion identification. Optical model calculations including absorption.

doi: 10.1016/0375-9474(78)90084-2
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1978JO09      Phys.Lett. 78B, 560 (1978)

R.R.Johnson, B.Bassalleck, K.Erdman, B.Gyles, T.Marks, T.Masterson, D.R.Gill, C.Sabev

Elastic Scattering of π^- from ¹²C at 29 MeV

NUCLEAR REACTIONS ¹²C(π^-, π^-), E=29 MeV; measured σ(θ).

doi: 10.1016/0370-2693(78)90639-1
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1976DO06      Phys.Lett. 63B, 416 (1976)

H.Dollard, K.L.Erdman, R.R.Johnson, H.R.Johnston, T.Masterson, P.Walden

Elastic Scattering of Positive Pions from ¹²C at 29 MeV

NUCLEAR REACTIONS ¹²C(π⁺, π⁺), E=29 MeV; measured σ(θ).

doi: 10.1016/0370-2693(76)90384-1
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1972CA30      J.Phys.(London) A5, 1529 (1972)

M.E.Cage, P.D.Kunz, R.R.Johnson, D.A.Lind

A Study of the ¹¹³In(³He, d)¹¹⁴Sn Reaction at 37.7 MeV

NUCLEAR REACTIONS ¹¹³In(³He, d), (³He, ³He), E=37.7 MeV; measured σ(θ); deduced optical model parameters. ¹¹⁴Sn deduced levels, J, π, L(p), p-H strengths.

doi: 10.1088/0305-4470/5/10/019
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1971BE21      Can.J.Phys. 49, 1374 (1971)

J.L.Beveridge, R.R.Johnson

Final State Interactions in the Reaction T(³He, ⁴He)np

NUCLEAR REACTIONS ³H(³He, α)np, E=1.5 MeV; measured σ(Ep, Eα, θ(p), θ(α)); deduced n-n, n-p scattering lengths.

doi: 10.1139/p71-163
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1971CA05      Nucl.Phys. A162, 657 (1971)

M.E.Cage, R.R.Johnson, P.D.Kunz, D.A.Lind

The ³⁹K(³He, ³He)³⁹K and ³⁹K(³He, D)⁴⁰Ca Reactions at 29.3 MeV

NUCLEAR REACTIONS ³⁹K(³He, ³He), ³⁹K(³He, d), E=29.3 MeV; measured σ(θ), σ(Ed, θ). ⁴⁰Ca deduced levels, L, π, S, β₂. Natural targets.

doi: 10.1016/0375-9474(71)90263-6
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1971FA03      Nucl.Phys. A163, 203 (1971)

W.L.Fadner, R.E.L.Green, S.I.Hayakawa, J.J.Kraushaar, R.R.Johnson

Study of Isobaric Analog Ground States for Several Nuclei Using the (³He, t) Reaction

NUCLEAR REACTIONS ⁵⁴Fe, ⁶²Ni, ⁶⁴Ni, ⁹⁰Zr(³He, t), E=37.7 MeV; measured σ(Et, θ). ⁸⁹Y, ^90,92Zr, ⁹³Nb ground-state isobaric analogs deduced Coulomb energies. Enriched targets.

doi: 10.1016/0375-9474(71)90530-6
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1969KU02      Phys.Rev. 177, 1737(1969)

P.D.Kunz, E.Rost, R.R.Johnson

Particle Transfer Reactions on Deformed Nuclei

NUCLEAR REACTIONS ²⁴Mg(p, p), (p, d), E=27.3 MeV; measured σ(Ed, θ). ²³Mg deduced levels. Enriched target, optical-model analysis.

doi: 10.1103/PhysRev.177.1737
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1969KU09      Phys.Rev. 185, 1528 (1969)

P.D.Kunz, E.Rost, R.R.Johnson, G.D.Jones, S.I.Hayakawa

Analyses of Quasielastic and Quasi-Inelastic (³He, t) Scattering from the Ni Isotopes

NUCLEAR REACTIONS ^58,60,62,64Ni(³He, t), E = 37.5 MeV; measured σ(θ). Coupled-channel analysis, macroscopic, microscopic interaction models.

doi: 10.1103/PhysRev.185.1528
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1968JO03      Nucl.Phys. A107, 659 (1968)

G.D.Jones, R.R.Johnson, R.J.Griffiths

A Study of the ²⁸Si(p, d)²⁷Si Reaction

NUCLEAR REACTIONS ²⁸Si(p, p), E = 27.6 MeV; measured σ(θ). ²⁸Si(p, d), E = 27.6 MeV; measured σ(Ed, θ). ²⁷Si levels deduced L, S. Natural target.

doi: 10.1016/0375-9474(68)90793-8
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1968JO04      Nucl.Phys. A108, 113(1968)

R.R.Johnson, R.J.Griffiths

The ⁴⁰Ar(p, d)³⁹Ar and ³⁶Ar(p, d)³⁵Ar Reactions at 27.5 MeV

NUCLEAR REACTIONS ^36,40Ar(p, d), E = 27.5 MeV; measured σ(Ed, θ). ^35,39Ar deduced levels, L(n), , S. Enriched ³⁶Ar target.

doi: 10.1016/0375-9474(68)90148-6
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1968JO05      Nucl.Phys. A111, 449 (1968)

G.D.Jones, R.R.Johnson, J.H.Jett

Some Low-Lying Energy Levels of ⁴⁵Ti

NUCLEAR STRUCTURE ⁴⁵Ti; measured not abstracted; deduced nuclear properties.

doi: 10.1016/0375-9474(68)90137-1
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1968JO14      Nucl.Phys. A117, 273(1968)

R.R.Johnson, R.J.Griffiths

Proton Elastic and Inelastic Scattering from Argon at 25 MeV

NUCLEAR REACTIONS ^36,40Ar(p, p'); E=24.85 MeV; measured σ(θ, Ep'). ^36,40Ar levels deduced J, π, distortion parameters β(L). Enriched targets.

doi: 10.1016/0375-9474(68)90843-9
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1968JO16      Nucl.Phys. A122, 657 (1968)

R.R.Johnson, G.D.Jones

The ⁶⁴Zn(p, p')⁶⁴Zn and ⁶⁴Zn(p, d)⁶³Zn Reactions at 26 MeV

NUCLEAR REACTIONS ⁶⁴Zn(p, p), (p, p'), (p, d), E=26 MeV; measured σ(Ep', θ), σ(Ed, θ). ⁶⁴Zn deduced levels, ΔL, deformation parameters. ⁶³Zn deduced levels, L(n), S. Enriched target.

doi: 10.1016/0375-9474(68)90584-8
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO0491.

1967JO03      Phys.Rev. 153, 1169 (1967)

R.R.Johnson, N.M.Hintz

Nuclear Level-Density Fluctuations and Tests of the Compound Statistical Model

NUCLEAR STRUCTURE ⁶⁰Ni, ⁶⁴Zn, ⁶²Ni, ⁶⁶Zn, ⁶⁵Cu, ⁶³Cu, ⁶¹Cu; measured not abstracted; deduced nuclear properties.

doi: 10.1103/PhysRev.153.1169
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1967ST24      Nucl.Phys. A104, 67 (1967)

M.M.Stautberg, R.R.Johnson, J.J.Kraushaar, B.W.Ridley

The ⁹⁶Zr(p, p') and ⁹⁶Zr(p, d) Reaction at 19.4 MeV

NUCLEAR REACTIONS ⁹⁶Zr(p, p), (p, p'), (p, d), E=19.4 MeV; measured σ(Ep', θ), σ(Ed, θ), Q. ⁹⁶Zr deduced levels J, deformation parameters. ⁹⁵Zr deduced levels, L(n), S. Enriched target.

doi: 10.1016/0375-9474(67)90757-9
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1965JO16      Univ.Minnesota Linear Accelerator Lab. Annual Progr.Rept., p. 54 (1965)

R.R.Johnson, N.M.Hintz

Inelastic Proton Scattering at 10 MeV and the Statistical Model

NUCLEAR STRUCTURE ⁶⁰Ni, ⁵⁸Ni, ⁶⁴Zn, ⁶³Cu, ⁶⁶Zn, ⁶⁵Cu; measured not abstracted; deduced nuclear properties.

1965JO17      Thesis, Univ.Minnesota (1965); See Also 65Jo16

R.R.Johnson

Properties of Nuclear Level Densities from Inelastic Proton Scattering

NUCLEAR STRUCTURE ⁶⁵Cu, ⁶⁶Zn, ⁶³Cu, ⁶⁴Zn, ⁶²Ni, ⁶¹Cu, ⁵⁸Ni, ⁶⁰Ni; measured not abstracted; deduced nuclear properties.