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NSR database version of March 2, 2024.

Search: Author = R.Tacik

Found 61 matches.

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2006DE08      Phys.Lett. B 633, 209 (2006)

H.Denz, P.Amaudruz, J.T.Brack, J.Breitschopf, P.Camerini, J.L.Clark, H.Clement, L.Felawka, E.Fragiacomo, E.F.Gibson, N.Grion, G.J.Hofman, B.Jamieson, E.L.Mathie, R.Meier, G.Moloney, D.Ottewell, O.Patarakin, J.D.Patterson M.M.Pavan, S.Piano, K.Raywood, R.a.Ristinen, R.Rui, M.E.Sevior, G.R.Smith, J.Stahov, R.Tacik, G.J.Wagner, F.von Wrochem, D.M.Yeomans

π±p differential cross sections at low energies

NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), E=19.9-43.3 MeV; measured σ(E, θ); deduced isospin scattering amplitude. CHAOS spectrometer.

doi: 10.1016/j.physletb.2005.12.017
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2005GR28      Nucl.Phys. A763, 80 (2005)

N.Grion, M.Bregant, P.Camerini, E.Fragiacomo, S.Piano, R.Rui, E.F.Gibson, G.Hofman, E.L.Mathie, R.Meier, M.E.Sevior, G.R.Smith, R.Tacik, for the CHAOS Collaboration

The π → ππ process in nuclei and the restoration of chiral symmetry

NUCLEAR REACTIONS 1H(π-, π+π-), (π+, 2π+), E=243, 264, 284, 305 MeV; 2H, 12C, 40Ca, 208Pb(π+, 2π+), (π+, π+π-), E=283 MeV; Sc(π+, 2π+X), (π+, π+π-X), E=243, 264, 284, 305 MeV; measured invariant mass distributions, σ(θ), correlations; deduced partial chiral symmetry restoration.

doi: 10.1016/j.nuclphysa.2005.08.017
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2004CA08      Nucl.Phys. A735, 89 (2004)

P.Camerini, E.Fragiacomo, N.Grion, S.Piano, R.Rui, J.Clark, L.Felawka, E.F.Gibson, G.Hofman, E.L.Mathie, R.Meier, G.Moloney, D.Ottewell, K.Raywood, M.E.Sevior, G.R.Smith, R.Tacik, and the CHAOS Collaboration

General properties of the pion production reaction in nuclear matter

NUCLEAR REACTIONS 45Sc(π+, π+π-), (π+, π+π-p), (π+, 2π+), (π+, 2π+p), E=240-320 MeV; measured σ(E, θ), invariant mass, total σ; deduced reaction mechanism features. Comparison with previous results and model predictions.

doi: 10.1016/j.nuclphysa.2004.01.122
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2003HO12      Phys.Rev. C 68, 018202 (2003)

G.J.Hofman, J.Breitschopf, K.Craig, H.Denz, E.F.Gibson, E.L.Mathie, R.Meier, M.M.Pavan, C.M.Riedel, R.Tacik, G.J.Wagner

Analyzing powers for π-p elastic scattering at 279 MeV

NUCLEAR REACTIONS 1H(π-, π-), E=279 MeV; measured Ay(θ). Polarized target, comparison with model predictions.

doi: 10.1103/PhysRevC.68.018202
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2002CL04      Phys.Rev. C 66, 054606 (2002)

J.L.Clark, M.E.Sevior, H.Clement, J.Grater, R.Meier, G.J.Wagner, P.-A.Amaudruz, L.Felawka, G.J.Hofman, D.Ottewell, G.R.Smith, A.Ambardar, M.Kermani, G.Tagliente, P.Camerini, E.Fragiacomo, N.Grion, R.Rui, E.L.Mathie, R.Tacik, D.M.Yeomans, E.F.Gibson, J.T.Brack, M.Schepkin

Semiexclusive pionic double charge exchange on 4He

NUCLEAR REACTIONS 4He(π+, π-2p), E=105, 115 MeV; measured invariant mass spectra; deduced sequential single charge exchange, no dibaryon resonance.

doi: 10.1103/PhysRevC.66.054606
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2002PA41      Phys.Rev. C66, 025207 (2002)

J.D.Patterson, G.J.Hofman, J.T.Brack, P.Camerini, J.Clark, P.P.J.Delheij, L.Felawka, E.Fragiacomo, E.F.Gibson, N.Grion, B.Jamieson, E.L.Mathie, R.Meier, D.Ottewell, R.J.Peterson, K.Raywood, R.A.Ristinen, R.Rui, M.E.Sevior, G.R.Smith, R.Tacik, G.Tagliente, G.J.Wagner, D.M.Yeomans

Analyzing powers for πp elastic scattering between 57 and 139 MeV

NUCLEAR REACTIONS 1H(π-, π-), E=57-139 MeV; 1H(π+, π+), E=139 MeV; measured Ay(θ). Polarized target, comparison with previous results and model predictions.

doi: 10.1103/PhysRevC.66.025207
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2001CA53      Phys.Rev. C64, 067601 (2001)

P.Camerini, E.Fragiacomo, N.Grion, R.Rui, J.T.Brack, E.F.Gibson, G.J.Hofman, E.L.Mathie, R.Meier, K.Raywood, M.E.Sevior, G.R.Smith, R.Tacik

π→ππ Results in Nuclei

NUCLEAR REACTIONS 1,2H, C, 27Al, Cu(π-, 2π0), E at 408 MeV/c; 2H, 12C, 40Ca, 208Pb(π+, π+π-), (π+, 2π+), E at 399 MeV/c; analyzed invariant mass distributions. Similarities between different data sets discussed.

doi: 10.1103/PhysRevC.64.067601
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2001PA45      Phys.Rev. C64, 064611 (2001)

M.M.Pavan, J.T.Brack, F.Duncan, A.Feltham, G.Jones, J.Lange, K.J.Raywood, M.E.Sevior, R.Adams, D.F.Ottewell, G.R.Smith, B.Wells, R.L.Helmer, E.L.Mathie, R.Tacik, R.A.Ristinen, I.I.Strakovsky, H.-M.Staudenmaier

Precision Pion-Proton Elastic Differential Cross Sections at Energies Spanning the Δ Resonance

NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), E=141.15-267.3 MeV; measured σ(θ), (pion)(proton)-coin. Comparison with model predictions.

doi: 10.1103/PhysRevC.64.064611
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2001SU13      Nucl.Phys. A689, 406c (2001)

G.Suft, W.Beulertz, A.Bock, M.Frank, A.Glombik, J.Hey, B.Kowalzik, W.Kretschmer, S.Merz, H.Meyer, L.Sozuer, R.Weidmann, E.Boschitz, B.Brinkmoller, R.Meier, G.Mertens, B.van den Brandt, P.Hautle, J.A.Konter, S.Mango, L.Mathelitsch, H.Garcilazo, R.Tacik, P.Armaudruz, W.Gruebler

Measurement of Polarization Transfer in Pion-Deutron Elastic Scattering

NUCLEAR REACTIONS 2H(π+, π+), E=134, 180 MeV; measured polarization transfer observables. Polarized target, comparisons with model predictions.

doi: 10.1016/S0375-9474(01)00866-1
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2000BO38      Nucl.Phys. A677, 213 (2000)

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

The ππ Interaction in Nuclear Matter from a Study of the π+A → π+π± A' Reactions

NUCLEAR REACTIONS 2H, 12C, 40Ca, 208Pb(π+, π+π-), (π+, 2π+), E=283 MeV; measured two-pion invariant mass spectra, σ(θ); deduced medium modification effects.

doi: 10.1016/S0375-9474(00)00286-4
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2000QU01      Nucl.Phys. A663-664, 903c (2000)

M.A.Quraan, P.Amaudruz, W.Andersson, M.Comyn, Yu.Davydov, P.Depommier, J.Doornbos, W.Faszer, C.A.Gagliardi, D.R.Gill, P.Green, P.Gumplinger, J.C.Hardy, M.Hasinoff, R.Helmer, R.Henderson, A.Khruchinsky, P.Kitching, D.D.Koetke, E.Korkmaz, Y.Lachin, D.Mass, J.A.Macdonald, R.Manweiler, T.Mathie, J.R.Musser, P.Nord, A.Olin, D.Ottewell, R.Openshaw, L.Piilonen, T.Porcelli, J.-M.Poutissou, R.Poutissou, N.L.Rodning, J.Schaapman, V.Selivanov, G.Sheffer, Y.Shin, F.Sobratee, J.Soukup, T.D.S.Stanislaus, G.Stinson, R.Tacik, V.Torokhov, R.E.Tribble, M.A.Vasiliev, H.K.Walter, D.Wright

A Precision Measurement of Muon Decay

doi: 10.1016/S0375-9474(99)00793-9
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1999BO25      Phys.Rev. C60, 018201 (1999)

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

ππ Pairs in Nuclei and the σ Meson

NUCLEAR REACTIONS 2H, 12C, 16O, 40Ca, 208Pb(π+, π+π-), (π+, 2π+), E=283 MeV; measured σ; deduced in-medium correlation effects.

doi: 10.1103/PhysRevC.60.018201
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1999GR01      Eur.Phys.J. A 4, 5 (1999)

J.Grater, P.A.Amaudruz, R.Bilger, P.Camerini, J.Clark, H.Clement, E.Friedman, L.Felawka, S.N.Filippov, E.Friagiacomo, Yu.K.Gavrilov, E.Gibson, N.Grion, G.J.Hofman, B.Jamieson, T.L.Karavicheva, M.Kermani, E.L.Mathie, R.Meier, G.Moloney, D.Ottewell, J.Patzold, O.Patarakin, K.Raywood, R.Rui, M.Schepkin, M.E.Sevior, G.R.Smith, H.Staudenmaier, R.Tacik, G.Tagliente, G.J.Wagner, M.Yeomans

Search for a Bound Trineutron with the 3He(π-π+)nnn Reaction

NUCLEAR REACTIONS 3He(π-, π+), E=65, 75, 120 MeV; measured three-neutron system invariant mass spectra; deduced no trineutron bound state or unbound resonance.

doi: 10.1007/s100500050196
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1998HO21      Phys.Rev. C58, 3484 (1998)

G.J.Hofman, G.R.Smith, T.Ambardar, F.Bonutti, J.T.Brack, P.Camerini, J.Clark, P.P.J.Delheij, F.Farzanpay, L.Felawka, E.Fragiacomo, E.F.Gibson, J.Graeter, N.Grion, M.Kermani, E.L.Mathie, R.Meier, D.Ottewell, R.J.Peterson, R.A.Ristinen, R.Rui, M.E.Sevior, H.Staudenmaier, R.Tacik, G.J.Wagner

Analyzing Powers for π±p(pol) Elastic Scattering between 87 and 263 MeV

NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), E=87-267 MeV; measured Ay(θ); deduced phase shift analysis parameters. Polarized target.

doi: 10.1103/PhysRevC.58.3484
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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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1998KE07      Phys.Rev. C58, 3431 (1998)

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

ππ → ππ Cross Sections Near Threshold

NUCLEAR REACTIONS 1H(π-, π-π+), (π+, 2π+), E=223, 243, 264, 284 MeV; analyzed data; deduced pion-pion cross sections, scattering length.

doi: 10.1103/PhysRevC.58.3431
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1998KR04      Nucl.Phys. A631, 524c (1998)

W.Kretschmer, A.Glombik, G.Suft, R.Weidmann, E.Boschitz, B.Brinkmoller, R.Meier, B.van den Brandt, P.Hautle, J.A.Konter, S.Mango, R.Tacik, P.Amaudruz, C.Riedel, W.Gruebler

Polarization Transfer Observables in πd Elastic Scattering

NUCLEAR REACTIONS 2H(π+, π+), E=134, 180 MeV; measured T20(θ). Polarized target.

doi: 10.1016/S0375-9474(98)00060-8
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1998SU12      Phys.Lett. 425B, 19 (1998)

G.Suft, P.Amaudruz, E.Boschitz, B.van den Brandt, B.Brinkmoller, A.Glombik, J.Goetz, W.Gruebler, P.Hautle, J.A.Konter, W.Kretschmer, M.Lauterbach, S.Mango, R.Meier, C.Riedel, R.Tacik, R.Weidmann

Polarization Transfer Observables in πd Elastic Scattering

NUCLEAR REACTIONS 2H(π+, π+), E=134, 180 MeV; measured analyzing power, polarization transfer observables vs θ. Phase shift analysis, Fadeev calculations. Polarized target.

doi: 10.1016/S0370-2693(98)00173-7
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1998TA02      Phys.Rev. C57, 1295 (1998)

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

Pion Absorption in 12C

NUCLEAR REACTIONS 12C(π+, 2p), (π+, 3p), E=200, 240, 280 MeV; measured protons σ(E, θ); deduced reaction mechanism.

doi: 10.1103/PhysRevC.57.1295
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1997BO15      Phys.Rev. C55, 2998 (1997)

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

Pion-Induced Pion Production in Nuclei

NUCLEAR REACTIONS 2H, 12C, 40Ca, 208Pb(π+, π+π-), (π+, π+π-p), E at 283 MeV/c; measured missing mass, energy distributions; deduced pion production mechanism.

doi: 10.1103/PhysRevC.55.2998
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1996BO09      Phys.Rev.Lett. 77, 603 (1996)

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

A Dependence of the (π+, π+π±) Reaction Near the 2m(π) Threshold

NUCLEAR REACTIONS 2H, 12C, 40Ca, 208Pb(π+, 2π+), (π+, π+π-), E=282.7 MeV; measured double-pion invariant mass distribution; deduced ππ-interaction matter modification.

doi: 10.1103/PhysRevLett.77.603
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1996TA25      Acta Phys.Pol. B27, 3067 (1996)

R.Tacik

Pion-Nucleus Physics with the CHAOS Detector at TRIUMF


1995PA22      Phys.Rev. C51, R2862 (1995)

Z.Papandreou, G.M.Huber, G.J.Lolos, J.C.Cormier, E.L.Mathie, S.I.H.Naqvi, D.F.Ottewell, R.Tacik, P.L.Walden, G.Jones, R.P.Trelle, X.Aslanoglou, D.L.Humphrey

6Li(π+, pp)4He(g.s.) Reaction at 100 and 165 MeV Incident Pion Energies

NUCLEAR REACTIONS 6Li(π+, 2p), E=100, 165 MeV; measured σ(E, θ1, θ2); deduced σ(E).

doi: 10.1103/PhysRevC.51.R2862
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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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1995YE02      Phys.Rev. C52, 2526 (1995)

D.M.Yeomans, E.L.Mathie, G.M.Huber, G.J.Lolos, S.I.H.Naqvi, V.Pafilis, G.Jones, M.Sevior, R.P.Trelle, P.Weber, R.Tacik, D.Healey, D.F.Ottewell, G.R.Smith, G.Wait, H.Garcilazo, D.L.Humphrey

Analyzing Power Measurements in Pion-Deuteron Breakup at Intermediate Energies

NUCLEAR REACTIONS 2H(π+, pπ+), E=80-300 MeV; measured iT11(θ) vs proton momentum following breakup. Polarized target. Relativistic Faddeev calculations comparison.

doi: 10.1103/PhysRevC.52.2526
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1994BR10      Phys.Rev. C49, R2276 (1994)

H.Breuer, M.G.Khayat, F.Adimi, B.S.Flanders, M.A.Khandaker, P.G.Roos, D.Zhang, Th.S.Bauer, J.Konijn, C.T.A.M.de Laat, G.S.Kyle, S.Mukhopadhyay, M.Wang, R.Tacik

Excitation Function for 4He(π+, pp)2H Two-Nucleon Absorption Across the Δ Resonance

NUCLEAR REACTIONS 4He(π+, 2p), E=64-327 MeV; measured σ(θ), σ(E) for 2-nucleon production; deduced reaction mechanism. Quasideuteron model.

doi: 10.1103/PhysRevC.49.R2276
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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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1994ME01      Phys.Rev. C49, 320 (1994)

R.Meier, E.Boschitz, B.Brinkmoller, J.Buhler, S.Ritt, M.Wessler, J.A.Konter, S.Mango, B.van den Brandt, V.A.Efimovykh, A.I.Kovalev, A.N.Prokofiev, V.V.Polyakov, P.Chaumette, J.Deregel, G.Durand, J.Fabre, R.Mach, R.Tacik

Vector Analyzing Power Measurement of Pion Scattering from Polarized 7Li in the Region of the Δ33 Resonance

NUCLEAR REACTIONS 7Li(π+, π+), E=134, 164, 194 MeV; measured inclusive analyzing powers iT11(θ), σ(θ). Polarized target. Coupled channels optical model.

doi: 10.1103/PhysRevC.49.320
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1994YE03      Phys.Rev. C49, 2898 (1994)

D.M.Yeomans, E.L.Mathie, G.M.Huber, S.I.H.Naqvi, D.S.Persram, M.Pavan, R.Tacik, D.Healey, D.F.Ottewell, G.R.Smith, P.Amaudruz

Analyzing Power Measurements in Pion Deuteron Absorption at Low Energies

NUCLEAR REACTIONS 2H(π+, 2p), E=25, 65 MeV; measured iT11(θ). Model calculations comparisons. Polarized target.

doi: 10.1103/PhysRevC.49.2898
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1992AD03      Phys.Rev. C45, 2589 (1992)

F.Adimi, H.Breuer, B.S.Flanders, M.A.Khandaker, M.G.Khayat, P.G.Roos, D.Zhang, Th.S.Bauer, J.Konijn, C.T.A.M.de Laat, G.S.Kyle, S.Mukhopadhyay, M.Wang, R.Tacik

Two-Nucleon Absorption of π+ in 4He at T(π+) = 114 and 162 MeV

NUCLEAR REACTIONS 4He(π+, 2p), E=114, 162 MeV; measured missing momentum distribution, pp(φ), σ(θp); deduced absorption on two-nucleon σ. Quasideuteron absorption model, Monte Carlo simulations.

doi: 10.1103/PhysRevC.45.2589
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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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1991RI01      Phys.Rev. C43, 745 (1991)

S.Ritt, E.T.Boschitz, R.Meier, R.Tacik, M.Wessler, K.Junker, J.A.Konter, S.Mango, D.Renker, B.van den Brandt, V.Efimovykh, A.Kovaliov, A.Prokofev, R.Mach, P.Chaumette, J.Deregel, G.Durand, J.Fabre, W.Thiel

Measurement of the Vector Analyzing Power iT11 in π+-6Li(pol) Scattering

NUCLEAR REACTIONS 6Li(π+, π+), (π+, π+'), E=100-219 MeV; measured σ(θ), vector analyzing power vs θ. Vector polarized 6LiD target. Model analyses.

doi: 10.1103/PhysRevC.43.745
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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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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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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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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.


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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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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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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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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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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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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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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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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