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Search: Author = W.Gyles

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1995WE05      Phys.Rev. C51, 2575 (1995)

M.Wessler, E.Boschitz, B.Brinkmoller, J.Buhler, H.Garcilazo, W.Gyles, W.List, R.Meier, S.Ritt, R.Tacik, J.A.Konter, D.Gill, S.Mango, D.Renker, B.van den Brandt, G.Wait, V.A.Efimovykh, A.I.Kovalev, A.N.Prokofiev, W.Thiel, B.Blankleider

Polarization Observables in πd(pol) Elastic Scattering: Analyzing powers τ₂₂ and iT₁₁ in the Forward Hemisphere

NUCLEAR REACTIONS ²H(π⁺, π⁺), E=100-294 MeV; measured analyzing powers, other observables. Polarized target, two different methods. Model comparison.

doi: 10.1103/PhysRevC.51.2575
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1991PE14      Phys.Lett. 261B, 188 (1991)

F.Perrot-Kunne, R.Bertini, M.Costa, H.Catz, A.Chaumeaux, J.-C.Faivre, E.Vercellin, J.Arvieux, J.Yonnet, B.van den Brandt, D.R.Gill, J.A.Konter, S.Mango, G.D.Wait, E.Boschitz, W.Gyles, W.List, C.Ottermann, R.Tacik, M.Wessler

Measurement of the Analyzing Power in (p-bar)p Elastic Scattering at 439 and 544 MeV/c

NUCLEAR REACTIONS ¹H(p-bar, p-bar), E at 439, 544 MeV/c; measured σ(θ), analyzing power vs θ. Model comparison. Polarized target.

doi: 10.1016/0370-2693(91)91348-Y
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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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1990TA24      Phys.Rev. C42, 1841 (1990)

R.Tacik, E.T.Boschitz, W.Gyles, M.Wessler, S.Mango, B.van den Brandt, J.A.Konter, D.R.Gill, P.Weber

Comparison of the Vector Analyzing Power iT₁₁ for π±d Scattering at 180 MeV

NUCLEAR REACTIONS ²H(π⁺, π⁺), (π^-, π^-), E=180 MeV; measured vector analyzing power iT₁₁(θ). Polarized target, magnetic spectrometer.

doi: 10.1103/PhysRevC.42.1841
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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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1989BE31      Phys.Lett. 228B, 531 (1989)

R.Bertini, M.Costa, F.Perrot, H.Catz, A.Chaumeaux, J.Cl.Faivre, E.Vercellin, J.Arvieux, J.Yonnet, B.van den Brandt, J.A.Konter, D.R.Gill, S.Mango, G.D.Wait, E.Boschitz, W.Gyles, W.List, C.Ottermann, R.Tacik, M.Wessler, E.Descroix, J.Y.Grossiord, A.Guichard

Full Angular Distribution of the Analysing Power in (p-bar)p Elastic Scattering at 697 MeV/c

NUCLEAR REACTIONS ¹H(p-bar, p-bar), E at 697 MeV/c; measured σ(θ), analyzing power vs θ.

doi: 10.1016/0370-2693(89)90988-X
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1989GA03      Phys.Rev. C39, 942 (1989)

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

Polarization Observables in πd(pol) Elastic Scattering: Amplitude analysis

NUCLEAR REACTIONS ²H(π, π), E=254, 294 MeV; analyzed polarization observables data; deduced πd helicity amplitudes. Polarized targets, amplitude analysis.

doi: 10.1103/PhysRevC.39.942
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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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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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1988LI09      Phys.Rev. C37, 1594 (1988)

W.List, E.T.Boschitz, H.Garcilazo, W.Gyles, C.R.Ottermann, R.Tacik, S.Mango, J.A.Konter, B.van den Brandt, G.R.Smith

Neutron-Proton Final-State Interaction in πd Breakup: Vector analyzing power

NUCLEAR REACTIONS ²H(π⁺, np), E=134-228 MeV; measured iT₁₁(θ) following breakup; deduced final state interaction role. Polarized target.

doi: 10.1103/PhysRevC.37.1594
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1988OT06      Phys.Rev. C38, 2296 (1988)

C.R.Ottermann, E.T.Boschitz, W.Gyles, W.List, R.Tacik, M.Wessler, S.Mango, B.van den Brandt, J.A.Konter, D.R.Gill, G.R.Smith

Polarization Observables in πd(pol) Elastic Scattering: Analyzing powers T₂₀ and τ₂₁

NUCLEAR REACTIONS ²H(π, π), E=256, 294 MeV; measured absolute σ(θ), T₂₀(θ), other observables. Tensor polarized target.

doi: 10.1103/PhysRevC.38.2296
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1988OT07      Phys.Rev. C38, 2310 (1988)

C.R.Ottermann, E.T.Boschitz, H.Garcilazo, W.Gyles, W.List, R.Tacik, M.Wessler, S.Mango, B.van den Brandt, J.A.Konter, E.L.Mathie

Polarization Observables in πd(pol) Elastic Scattering: Analyzing powers τ₂₂ and iT₁₁

NUCLEAR REACTIONS ²H(π, π), E=134-294 MeV; measured iT₁₁, T₂₀, T₂₁, T₂₂ vs θ, other observables. Polarized target, frozen spin mode.

doi: 10.1103/PhysRevC.38.2310
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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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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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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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1986OT02      Phys.Rev. C33, 1802 (1986)

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

Measurement of the πd(pol) → pp Reaction at T(π) = 65 MeV

NUCLEAR REACTIONS ²H(π, p), E=65 MeV; measured vector analyzing power vs θ. Vector polarized target. Coupled-channels, Faddeev, perturbation theory calculations.

doi: 10.1103/PhysRevC.33.1802
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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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1985TA14      Phys.Rev. C32, 1335 (1985)

R.Tacik, E.T.Boschitz, W.Gyles, W.List, C.R.Ottermann

Measurement of Three Protons in Coincidence following Absorption of 228 MeV π⁺ in Carbon

NUCLEAR REACTIONS C(π⁺, 3p), E=228 MeV; measured ppp-coin, σ(θ₁, θ₂, θ₃), σ(θ₁, θ₂, E₂), σ(θ₁, θ₃, E₃); deduced three proton emission associated σ(absorption), reaction mechanism.

doi: 10.1103/PhysRevC.32.1335
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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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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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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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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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