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NSR database version of April 11, 2024.

Search: Author = S.Wycech

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2023CA18      Eur.Phys.J. A 59, 259 (2023)

J.Carbonell, G.Hupin, S.Wycech

Comparison of N-bar N optical models

doi: 10.1140/epja/s10050-023-01161-x
Citations: PlumX Metrics


2023PI06      Phys.Rev. C 108, 055201 (2023)

K.Piscicchia, M.Skurzok, M.Cargnelli, R.Del Grande, L.Fabbietti, J.Marton, P.Moskal, A.Ramos, A.Scordo, D.L.Sirghi, O.Vazquez Doce, J.Zmeskal, S.Wycech, P.Branchini, F.Ceradini, E.Czerwinski, E.De Lucia, S.Fiore, A.Kupsc, G.Mandaglio, M.Martini, A.Passeri, V.Patera, E.Perez Del Rio, A.Selce, M.Silarski, C.Curceanu

First simultaneous K- p → Σ0π0, Λπ0 cross section measurements at 98 MeV/c

doi: 10.1103/PhysRevC.108.055201
Citations: PlumX Metrics


2023WY01      Phys.Rev. C 108, 014313 (2023)

S.Wycech, K.Piscichia

Pionization: A method to study the nuclear surface

NUCLEAR REACTIONS 1n, 1,2H, C, 48Ti, 181Ta, Pb(p-bar, X), E atlow energies; analyzed several pionization experiments in antiproton annihilations; deduced neutron halos, pion absorption and charge multiplicities, final state absorption and charge-exchange interactions of the mesons, average final-state pion absorption probabilities, probabilities of multimeson state formation, short-ranged proton-neutron correlations, spin averaged antiproton-proton and antiproton-neutron absorptive amplitudes, neutron excess from Rn/p ratio of antiproton-proton to antiproton-neutron annihilations. Relevance to PUMA experiment at CERN to investigate nuclear surfaces of unstable nuclei, neutron skin thickness, and pionic charge measurements.

doi: 10.1103/PhysRevC.108.014313
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2022AU03      Eur.Phys.J. A 58, 88 (2022)

T.Aumann, W.Bartmann, O.Boine-Frankenheim, A.Bouvard, A.Broche, F.Butin, D.Calvet, J.Carbonell, P.Chiggiato, H.De Gersem, R.De Oliveira, T.Dobers, F.Ehm, J.Ferreira Somoza, J.Fischer, M.Fraser, E.Friedrich, A.Frotscher, M.Gomez-Ramos, J.-L.Grenard, A.Hobl, G.Hupin, A.Husson, P.Indelicato, K.Johnston, C.Klink, Y.Kubota, R.Lazauskas, S.Malbrunot-Ettenauer, N.Marsic, W.F.O Muller, S.Naimi, N.Nakatsuka, R.Necca, D.Neidherr, G.Neyens, A.Obertelli, Y.Ono, S.Pasinelli, N.Paul, E.C.Pollacco, D.Rossi, H.Scheit, M.Schlaich, A.Schmidt, L.Schweikhard, R.Seki, S.Sels, E.Siesling, T.Uesaka, M.Vilen, M.Wada, F.Wienholtz, S.Wycech, S.Zacarias

PUMA, antiProton unstable matter annihilation

doi: 10.1140/epja/s10050-022-00713-x
Citations: PlumX Metrics


2020LO10      Phys.Rev. C 102, 034006 (2020)

B.Loiseau, S.Wycech

Extraction of baryonia from the lightest antiprotonic atoms

ATOMIC PHYSICS 1,2H, 3,4He; analyzed experimental data for antiprotonic hydrogen and helium atoms using the 2009 version of the Paris nucleon-antinucleon interaction potential; calculated s-wave scattering lengths and P-wave volumes using the Paris 1999 and Paris 2009 models, atomic 2P hyperfine structure splittings for antiprotonic deuterium. Comparison of the level shifts and widths in deuterium and helium atoms with the predictions of the Paris potential models. Relevance to successful description of atomic, bubble chamber, and radiochemical data.

doi: 10.1103/PhysRevC.102.034006
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2018DE23      Phys.Rev. C 97, 065206 (2018)

J.-P.Dedonder, B.Loiseau, S.Wycech

Photon or meson formation in Jψ decays into pp(bar)

doi: 10.1103/PhysRevC.97.065206
Citations: PlumX Metrics


2018PI05      Phys.Lett. B 782, 339 (2018)

K.Piscicchia, S.Wycech, L.Fabbietti, M.Cargnelli, C.Curceanu, R.Del Grande, J.Marton, P.Moskal, A.Scordo, M.Silarski, D.Sirghi, M.Skurzok, I.Tucakovic, O.Vazquez Doce, J.Zmeskal, P.Branchini, E.Czerwinski, V.De Leo, E.De Lucia, A.Di Cicco, P.Fermani, S.Fiore, W.Krzemien, G.Mandaglio, M.Martini, E.Perez del Rio, A.Selce

First measurement of the K-n → Λπ- non-resonant transition amplitude below threshold

NUCLEAR REACTIONS 4He(K-, Λ), E ∼ 120 MeV; measured reaction products; deduced yields, resonant to non-resonant ratios and amplitudes of the various channels, momentum distributions. Comparison with phenomenological model.

doi: 10.1016/j.physletb.2018.05.025
Citations: PlumX Metrics


2018SK07      Acta Phys.Pol. B49, 705 (2018)

M.Skurzok, M.Cargnelli, C.Curceanu, R.Del Grande, L.Fabbietti, C.Guaraldo, J.Marton, P.Moskal, K.Piscicchia, A.Scordo, M.Silarski, D.L.Sirghi, I.Tucakovic, O.Vazquez Doce, S.Wycech, E.Widmann, J.Zmeskal

Search for Deeply Bound Kaonic Nuclear States in the AMADEUS Experiment

doi: 10.5506/aphyspolb.49.705
Citations: PlumX Metrics


2017DE32      Acta Phys.Pol. B48, 1881 (2017)

R.Del Grande, K.Piscicchia, S.Wycech

Formation of Σπ Pairs in Nuclear Captures of K- Mesons

NUCLEAR REACTIONS 12C(K-, Σ+π-), E not given; calculated invariant mass distribution of Σ+π- production following K- capture from atomic l=2 state; deduced dependence of the invariant mass distribution on the energy of 40 MeV wide resonance (and without resonances).

doi: 10.5506/APhysPolB.48.1881
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2016PI10      Nucl.Phys. A954, 75 (2016)

K.Piscicchia, S.Wycech, C.Curceanu

On the K-4He → Λπ-3He resonant and non-resonant processes

NUCLEAR REACTIONS 4He(K-,3HeΛ), E at plab=120, 160, 200, 245 MeV/c; calculated K-n to Λπ- transition amplitude using K-p to Λπ0 AMADEUS/KLOE-2 data. Analysis continues.

doi: 10.1016/j.nuclphysa.2016.05.007
Citations: PlumX Metrics


2015FR05      Nucl.Phys. A943, 101 (2015)

E.Friedman, A.Gal, B.Loiseau, S.Wycech

Antinucleon-nucleus interaction near threshold from the Paris N(bar)N potential

NUCLEAR REACTIONS 1H(n-bar, x), (p-bar, x), E at 50-390 MeV/c;Ca(p-bar, x), E at 70-390 MeV/c; calculated annihilation σ using Paris 2009 potential. 40Ca(p-bar, x), E=47.8 MeV; calculated σ(θ) using Paris 2009 and empirical potentials compared with data.

doi: 10.1016/j.nuclphysa.2015.08.010
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2012DR01      Nucl.Phys. A875, 1 (2012)

C.Droese, K.Blaum, M.Block, S.Eliseev, F.Herfurth, E.Minaya-Ramirez, Yu.N.Novikov, L.Schweikhard, V.M.Shabaev, I.I.Tupitsyn, S.Wycech, K.Zuber, N.A.Zubova

Probing the nuclide 180W for neutrinoless double-electron capture exploration

RADIOACTIVITY 180W(2EC); measured cyclotron frequency using Penning trap mass ratios using SHIPTRAP; deduced Q value, T1/2.

ATOMIC MASSES 180Hf, 180W; measured cyclotron frequency ratios using SHIPTRAP Penning trap; deduced Q.

doi: 10.1016/j.nuclphysa.2011.11.008
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2010WY01      Physics of Part.and Nuclei 41, 1132 (2010)

S.Wycech

On nuclear states of (K-bar) mesons

doi: 10.1134/S1063779610070348
Citations: PlumX Metrics


2009DE36      Phys.Rev. C 80, 045207 (2009)

J.-P.Dedonder, B.Loiseau, B.El-Bennich, S.Wycech

Structure of the X(1835) baryonium

doi: 10.1103/PhysRevC.80.045207
Citations: PlumX Metrics


2009EL06      Phys.Rev. C 79, 054001 (2009)

B.El-Bennich, M.Lacombe, B.Loiseau, S.Wycech

Paris N(N-bar) potential constrained by recent antiprotonic-atom data and (n-bar)p total cross sections

NUCLEAR REACTIONS p(p-bar, n-bar), E at 546, 656 MeV/c; p(p-bar, p), E at 544, 679, 790 MeV/c; analyzed σ, σ(θ), polarization and short-range parameters of Paris nucleon-antinucleon optical potential. Comparison with experimental data.

doi: 10.1103/PhysRevC.79.054001
Citations: PlumX Metrics


2009WY01      Phys.Rev. C 79, 014001 (2009)

S.Wycech, A.M.Green

Variational calculations for K(bar)-few-nucleon systems

doi: 10.1103/PhysRevC.79.014001
Citations: PlumX Metrics


2007KL02      Phys.Rev. C 76, 014311 (2007)

B.Klos, A.Trzcinska, J.Jastrzebski, T.Czosnyka, M.Kisielinski, P.Lubinski, P.Napiorkowski, L.Pienkowski, F.J.Hartmann, B.Ketzer, P.Ring, R.Schmidt, T.von Egidy, R.Smolanczuk, S.Wycech, K.Gulda, W.Kurcewicz, E.Widmann, B.A.Brown

Neutron density distributions from antiprotonic 208Pb and 209Bi atoms

NUCLEAR REACTIONS 208Pb, 209Bi(p-bar, X-ray), E at 106 MeV/c; measured x-ray cascade from antiprotonic atoms. Deduced neutron densities and rms radii.

doi: 10.1103/PhysRevC.76.014311
Citations: PlumX Metrics


2007WY02      Phys.Rev. C 76, 034316 (2007)

S.Wycech, F.J.Hartmann, J.Jastrzebski, B.Klos, A.Trzcinska, T.von Egidy

Nuclear surface studies with antiprotonic atom x rays

doi: 10.1103/PhysRevC.76.034316
Citations: PlumX Metrics


2006LU15      Eur.Phys.J. A 27, Supplement 1, 63 (2006)

L.Lukaszuk, Z.Sujkowski, S.Wycech

Searching for Majorana neutrinos with double beta decay and with beta beams

doi: 10.1140/epja/i2006-08-008-7
Citations: PlumX Metrics


2005GR02      Phys.Rev. C 71, 014001 (2005); Erratum Phys.Rev. C 72, 029902 (2005)

A.M.Green, S.Wycech

η-Nucleon scattering length and effective range uncertainties

doi: 10.1103/PhysRevC.71.014001
Citations: PlumX Metrics


2005LO08      Phys.Rev. C 72, 011001 (2005)

B.Loiseau, S.Wycech

Antiproton-proton channels in J/ψ decays

doi: 10.1103/PhysRevC.72.011001
Citations: PlumX Metrics


2004ER04      Phys.Lett. B 594, 76 (2004)

T.E.O.Ericson, B.Loiseau, S.Wycech

A phenomenological π-p scattering length from pionic hydrogen

ATOMIC PHYSICS, Mesic-atoms 1H(π-, X), E at rest; analyzed pionic atom energy shifts; deduced scattering length.

doi: 10.1016/j.physletb.2004.05.009
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2004JA03      Int.J.Mod.Phys. E13, 343 (2004)

J.Jastrzebski, A.Trzcinska, P.Lubinski, B.Klos, F.J.Hartmann, T.von Egidy, S.Wycech

Neutron density distributions from antiprotonic atoms compared with hadron scattering data

NUCLEAR STRUCTURE 40,48Ca, 54,56,57Fe, 58,60,64Ni, 59Co, 90,96Zr, 106,116Cd, 112,116,120,124Sn, 122,124,126,128,130Te, 208Pb, 209Bi, 232Th, 238U; analyzed antiproton annihilation data; deduced neutron and proton density distributions, radii.

doi: 10.1142/S0218301304002168
Citations: PlumX Metrics


2004KL06      Phys.Rev. C 69, 044311 (2004)

B.Klos, S.Wycech, A.Trzcinska, J.Jastrzebski, T.Czosnyka, M.Kisielinski, P.Lubinski, P.Napiorkowski, L.Pienkowski, F.J.Hartmann, B.Ketzer, R.Schmidt, T.von Egidy, J.Cugnon, K.Gulda, W.Kurcewicz, E.Widmann

Strong interaction and E2 effect in even-A antiprotonic Te atoms

ATOMIC PHYSICS 122,124,126,128,130Te(p-bar, X), E at 106, 300 MeV/c; measured X-ray spectra from antiprotonic atoms; deduced level widths and shifts, nuclear resonance effect. 122,124,126,128,130Te deduced relative neutron, proton radii, neutron density at periphery.

doi: 10.1103/PhysRevC.69.044311
Citations: PlumX Metrics


2004SU27      Phys.Rev. C 70, 052501 (2004)

Z.Sujkowski, S.Wycech

Neutrinoless double electron capture: A tool to search for Majorana neutrinos

RADIOACTIVITY 112Sn, 136Ce, 152Gd, 162,164Er, 180W(2EC); calculated neutrinoless double electron capture rates. Experimental feasibility discussed.

doi: 10.1103/PhysRevC.70.052501
Citations: PlumX Metrics


2004WY01      Nucl.Instrum.Methods Phys.Res. B214, 164 (2004)

S.Wycech

Studies of the nuclear surface with antiprotonic atoms

NUCLEAR STRUCTURE 40,42,44,48Ca, 112,116,120,124Sn; analyzed antiprotonic-atom X-ray data; deduced neutron and proton radii.

doi: 10.1016/j.nimb.2003.08.022
Citations: PlumX Metrics


2004WY02      Acta Phys.Pol. B35, 1223 (2004)

S.Wycech, Z.Sujkowski

On the Atomic Resonances in the 0ν2EC Transitions


2003ER03      Nucl.Phys. A721, 653c (2003)

T.E.O.Ericson, B.Loiseau, S.Wycech

Electromagnetic corrections to π-p scattering length from pionic hydrogen

doi: 10.1016/S0375-9474(03)01145-X
Citations: PlumX Metrics


2003GR28      Phys.Rev. C 68, 061601 (2003)

A.M.Green, S.Wycech

η-π mixing close to the η-helium threshold

NUCLEAR REACTIONS 2H(p, π0), E at 1.55-1.6 GeV/c; calculated amplitudes; analyzed σ; deduced η-π mixing ratio. K-matrix formalism.

doi: 10.1103/PhysRevC.68.061601
Citations: PlumX Metrics


2003SC13      Phys.Rev. C 67, 044308 (2003)

R.Schmidt, A.Trzcinska, T.Czosnyka, T.von Egidy, K.Gulda, F.J.Hartmann, J.Jastrzebski, B.Ketzer, M.Kisielinski, B.Klos, W.Kurcewicz, P.Lubinski, P.Napiorkowski, L.Pienkowski, R.Smolanczuk, E.Widmann, S.Wycech

Nucleon density in the nuclear periphery determined with antiprotonic x rays: Cadmium and tin isotopes

NUCLEAR REACTIONS 106,116Cd, 112,116,120,124Sn(p-bar, X), E at rest; measured antiprotonic x-ray spectra. 106,116Cd, 112,116,120,124Sn deduced nucleon density distributions, radii. Comparison with previous data and model predictions.

ATOMIC PHYSICS 106,116Cd, 112,116,120,124Sn; measured antiprotonic x-ray spectra; deduced atomic level widths and shifts.

doi: 10.1103/PhysRevC.67.044308
Citations: PlumX Metrics


2002HA01      Phys.Rev. C65, 014306 (2002)

F.J.Hartmann, R.Schmidt, B.Ketzer, T.von Egidy, S.Wycech, R.Smolanczuk, T.Czosnyka, J.Jastrzebski, M.Kisielinski, P.Lubinski, P.Napiorkowski, L.Pienkowski, A.Trzcinska, B.Klos, K.Gulda, W.Kurcewicz, E.Widmann

Nucleon Density in the Nuclear Periphery Determined with Antiprotonic X Rays: Calcium isotopes

ATOMIC PHYSICS 16O, 40,42,43,44,48Ca(p-bar, X), E at rest; measured antiprotonic X-ray spectra; deduced level widths. 40,42,43,44,48Ca deduced neutron density distribution features.

NUCLEAR REACTIONS 16O, 40,42,43,44,48Ca(p-bar, X), E at rest; measured antiprotonic X-ray spectra; deduced level widths. 40,42,43,44,48Ca deduced neutron density distribution features.

doi: 10.1103/PhysRevC.65.014306
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2002SU01      Acta Phys.Pol. B33, 471 (2002)

Z.Sujkowski, S.Wycech

On the Existence of Neutrino-Less Double Electron Capture Transitions

RADIOACTIVITY 92Mo, 108Cd, 180W, 196Hg(2EC); calculated T1/2 for radiative 0ν-accompanied two-EC decay. Possible experiment discussed.


2001CU01      Phys.Rev. C63, 027301 (2001)

J.Cugnon, S.Wycech, J.Jastrzebski, P.Lubinski

Geometrical Effects in Antiproton Annihilation on Nuclei

doi: 10.1103/PhysRevC.63.027301
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2001HA49      Acta Phys.Hung.N.S. 13, 51 (2001)

F.J.Hartmann, R.Schmidt, T.von Egidy, J.Jastrzebski, P.Lubinski, L.Pienkowski, A.Trzcinska, R.Smolanczuk, S.Wycech, B.Klos

Study of the Nuclear Periphery and Antiprotons

doi: 10.1556/APH.13.2001.1-3.7
Citations: PlumX Metrics


2001LO03      Phys.Rev. C63, 034003 (2001)

B.Loiseau, S.Wycech

πΛΣ Coupling Extracted from Hyperonic Atoms

NUCLEAR STRUCTURE 27Al, 28Si, 40Ca, 208Pb; analyzed hyperonic atoms level widths, related data; deduced pion-hyperon coupling constants.

doi: 10.1103/PhysRevC.63.034003
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2001PA44      Phys.Rev. C64, 064301 (2001)

K.Pachucki, S.Wycech, J.Zylicz, M.Pfutzner

Nuclear-Spin Mixing Oscillations in 229Th89+

NUCLEAR STRUCTURE 229Th; calculated time-dependent nuclear level-spin mixing in hydrogenlike ion.

doi: 10.1103/PhysRevC.64.064301
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2001WY01      Phys.Rev. C64, 045206 (2001)

S.Wycech, A.M.Green

Final State Interactions in the ηd System

doi: 10.1103/PhysRevC.64.045206
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2001WY03      Nucl.Phys. A692, 29c (2001)

S.Wycech, representing the PS209 Collaboration

Optical Potentials for the Antiproton Nucleus Interactions

doi: 10.1016/S0375-9474(01)01156-3
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2000WY01      Nucl.Phys. A663-664, 529c (2000)

S.Wycech, A.M.Green

The ηN and ηNN States

doi: 10.1016/S0375-9474(99)00648-X
Citations: PlumX Metrics


1999GR18      Phys.Rev. C60, 035208 (1999)

A.M.Green, S.Wycech

Coupled K-Matrix Description of the Reactions πN → πN, πN → ηN, γN → πN, and γN → ηN

NUCLEAR REACTIONS 1n, 1H(π, π), (π, X), (γ, π), (γ, X), E(cm)=1350-1700 MeV; analyzed η-meson production data; deduced K-matrix parameters, interference effects.

doi: 10.1103/PhysRevC.60.035208
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1999HA41      Nucl.Phys. A655, 289c (1999)

F.J.Hartmann, T.Czosnyka, K.Gulda, J.Jastrzebski, B.Ketzer, M.Kisielinski, B.Klos, J.Kulpa, W.Kurcewicz, P.Lubinski, P.Napiorkowski, L.Pienkowski, R.Schmidt, R.Smolanczuk, A.Trzcinska, T.von Egidy, E.Widmann, S.Wycech

Antiprotonic Atoms as a Tool to Study the Nuclear Periphery

doi: 10.1016/S0375-9474(99)00215-8
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1999SC35      Phys.Rev. C60, 054309 (1999)

R.Schmidt, F.J.Hartmann, B.Ketzer, T.von Egidy, T.Czosnyka, J.Jastrzebski, M.Kisielinski, P.Lubinski, P.Napiorkowski, L.Pienkowski, A.Trzcinska, B.Klos, R.Smolanczuk, S.Wycech, W.Poschl, K.Gulda, W.Kurcewicz, E.Widmann

Composition of the Nuclear Periphery from Antiproton Absorption using Short-Lived Residual Nuclei

NUCLEAR REACTIONS 48Ca, 100Mo, 104Ru, 112,124Sn, 116Cd(p-bar, X), E at rest; measured Eγ, Iγ(t) following residual nucleus decay; deduced yields, isomeric ratios. 48Ca, 100Mo, 104Ru, 112,124Sn, 116Cd deduced peripheral neutron-to-proton ratios, effective scattering lengths of antiprotons. Comparison with Hartree-Fock-Bogoliubov calculations.

doi: 10.1103/PhysRevC.60.054309
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1999SC49      Hyperfine Interactions 118, 67 (1999)

R.Schmidt, T.Czosnyka, K.Gulda, F.J.Hartmann, J.Jastrzebski, B.Ketzer, B.Klos, J.Kulpa, W.Kurcewicz, P.Lubinski, P.Napiorkowski, L.Pienkowski, R.Smolanczuk, A.Trzcinska, T.von Egidy, E.Widmann, S.Wycech

Determination of the proton and neutron densities at the nuclear periphery with antiprotonic X-rays and (p-bar)-nucleus reactions

NUCLEAR REACTIONS 172,176Yb(p-bar, X), E at rest; measured X-ray spectra; deduced strong interaction shifts, widths. 172,176Yb deduced surface nucleon densities.

ATOMIC PHYSICS 172,176Yb(p-bar, X), E at rest; measured X-ray spectra; deduced strong interaction shifts, widths. 172,176Yb deduced surface nucleon densities.

doi: 10.1023/A:1012680402100
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1999WY01      Nucl.Phys. A655, 257c (1999)

S.Wycech, T.Czosnyka, T.von Egidy, E.J.Hartmann, J.Jastrzebski, B.Klos, J.Kulpa, P.Lubinski, L.Pienkowski, R.Smolanczuk, R.Schmidt, A.Trzcinska

Nuclear Interactions of Antiprotons: Theory

doi: 10.1016/S0375-9474(99)00210-9
Citations: PlumX Metrics


1998AR18      Phys.Rev. C58, 3636 (1998)

R.A.Arndt, A.M.Green, R.L.Workman, S.Wycech

Energies and Residues of the Nucleon Resonances N(1535) and N(1650)

NUCLEAR STRUCTURE 1n, 1H; calculated resonances E, Γ, pole positions.

doi: 10.1103/PhysRevC.58.3636
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1998KA27      Phys.Rev. C57, 3085 (1998)

F.F.Karpeshin, S.Wycech, I.M.Band, M.B.Trzhaskovskaya, M.Pfutzner, J.Zylicz

Rates of Transitions between the Hyperfine-Splitting Components of the Ground-State and the 3.5 eV Isomer in 229Th89+

NUCLEAR STRUCTURE 229Th; calculated nuclear spin mixing due to hyperfine interactions, transition rates in hydrogen-like ion.

doi: 10.1103/PhysRevC.57.3085
Citations: PlumX Metrics


1998KU29      Acta Phys.Pol. B29, 3077 (1998)

J.Kulpa, S.Wycech

The Aborptive ρ2 Terms in the η Optical Potential


1998LU05      Phys.Rev. C57, 2962 (1998)

P.Lubinski, J.Jastrzebski, A.Trzcinska, W.Kurcewicz, F.J.Hartmann, W.Schmid, T.von Egidy, R.Smolanczuk, S.Wycech

Composition of the Nuclear Periphery from Antiproton Absorption

NUCLEAR REACTIONS 45Sc, 56Fe, 58Ni, 96Zr, 96Ru, Cd, 106Cd, 128,130Te, Te, 144,154Sm, 148Nd, Eu, 160Gd, Yb, 176Yb, 206Pb, 232Th, 238U(p-bar, X), E at rest; measured Eγ, Iγ; deduced annihilation products yields, isomeric ratios, charge exchange processes. 58Ni, 96Ru, 96Zr, 106Cd, 128,130Te, 144,154Sm, 148Nd, 160Gd, 176Yb, 232Th, 238U deduced nuclear periphery neutron-to-proton density ratios, related features. Radiochemical methods. Shell model calculations.

doi: 10.1103/PhysRevC.57.2962
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1998SC43      Phys.Rev. C58, 3195 (1998)

R.Schmidt, F.J.Hartmann, T.von Egidy, T.Czosnyka, J.Iwanicki, J.Jastrzebski, M.Kisielinski, P.Lubinski, P.Napiorkowski, L.Pienkowski, A.Trzcinska, J.Kulpa, R.Smolanczuk, S.Wycech, B.Klos, K.Gulda, W.Kurcewicz, E.Widmann

Nucleon Density of 172Yb and 176Yb at the Nuclear Periphery Determined with Antiprotonic x Rays

NUCLEAR REACTIONS 172,176Yb(p-bar, X), E at rest; measured x-ray spectra; deduced widths and shifts due to strong interaction. 172,176Yb deduced nucleon density at nuclear periphery.

doi: 10.1103/PhysRevC.58.3195
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1997GR05      Phys.Rev. C55, R2167 (1997)

A.M.Green, S.Wycech

η-Nucleon Scattering Length and Effective Range

doi: 10.1103/PhysRevC.55.R2167
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1996GR17      Phys.Rev. C54, 1970 (1996)

A.M.Green, J.A.Niskanen, S.Wycech

η-Deuteron Scattering

NUCLEAR REACTIONS 2H(X, X), E=low; calculated ηd-scattering length; deduced need to go beyond fixed nucleon approximation.

doi: 10.1103/PhysRevC.54.1970
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1996WY01      Phys.Rev. C54, 1832 (1996)

S.Wycech, J.Skalski, R.Smolanczuk, J.Dobaczewski, J.R.Rook

Antiprotonic Studies of Nuclear Neutron Halos

NUCLEAR STRUCTURE 58Ni, 96Zr, 130Te, 144,154Sm, 176Yb, 232Th, 238U; calculated p-bar atomic capture, nucleon capture associated σ(A-1), σ(np). Asymptotic density, Hartree-Fock, HFB models.

doi: 10.1103/PhysRevC.54.1832
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1996WY02      Acta Phys.Pol. B27, 2981 (1996)

S.Wycech

Simple Analysis of the Threshold Meson Production in pp Collisions


1995WY01      Phys.Rev. C52, 544 (1995)

S.Wycech, A.M.Green, J.A.Niskanen

Are There η-Helium Bound States ( Question )

NUCLEAR REACTIONS 2H(p, X), (d, X), E not given; calculated eta production (amplitude)2, amplitude vs eta momentum; deduced (eta-4He) quasibound state evidence. Multiple scattering theory.

doi: 10.1103/PhysRevC.52.544
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1994LU13      Phys.Rev.Lett. 73, 3199 (1994)

P.Lubinski, J.Jastrzebski, A.Grochulska, A.Stolarz, A.Trzcinska, W.Kurcewicz, F.J.Hartmann, W.Schmid, T.von Egidy, J.Skalski, R.Smolanczuk, S.Wycech, D.Hilscher, D.Polster, H.Rossner

Neutron Halo in Heavy Nuclei from Antiproton Absorption

NUCLEAR REACTIONS 58Ni, 96Zr, 96Ru, 130Te, 154,144Sm, 176Yb, 232Th, U(p-bar, X), E at 200 MeV/c; measured residuals production yield; deduced neutron halo features.

doi: 10.1103/PhysRevLett.73.3199
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1993JA09      Nucl.Phys. A558, 405c (1993)

J.Jastrzebski, H.Daniel, T.von Egidy, A.Grabowska, Y.S.Kim, W.Kurcewicz, P.Lubinski, G.Riepe, W.Schmid, A.Stolarz, S.Wycech

Signature of Neutron Halo in 232Th from Antiproton Absorption

NUCLEAR REACTIONS 232Th(p-bar, X), E at rest; measured Eγ, Iγ; deduced evidence for 231Th, 231Ac. 232Th deduced neutron, proton densities, neutron halo evidence.

doi: 10.1016/0375-9474(93)90409-Q
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1993WY03      Nucl.Phys. A561, 607 (1993)

S.Wycech, F.J.Hartmann, H.Daniel, W.Kanert, H.S.Plendl, T.von Egidy, J.J.Reidy, M.Nicholas, L.A.Redmond, H.Koch, A.Kreissl, H.Poth, D.Rohmann

Antiprotonic Atoms with Heavy Nuclei

NUCLEAR REACTIONS 126,130Te, 150,152Sm, 194,196Pt, 94,98Mo(p-bar, X), E=low; measured X-ray spectra; deduced optical potential features, atomic level widths, shifts.

ATOMIC PHYSICS 126,130Te, 150,152Sm, 194,196Pt, 94,98Mo(p-bar, X), E=low; measured X-ray spectra; deduced optical potential features, atomic level widths, shifts.

doi: 10.1016/0375-9474(93)90068-9
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1993WY04      Nucl.Phys. A562, 446 (1993)

S.Wycech, A.M.Green

The Production of the Exotic Atoms π+π-, K+π- and K+K-

NUCLEAR REACTIONS 1,2H(p, X), E=threshold; calculated exotic atom production estimates.

doi: 10.1016/0375-9474(93)90207-E
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1993WY05      Acta Phys.Pol. B24, 1795 (1993)

S.Wycech

Mesonic Effects in Antiprotonic Atoms

NUCLEAR REACTIONS 232Th(p-bar, X), E at rest; calculated correction factor in atomic level widths. Anti-protonic atoms.

ATOMIC PHYSICS 232Th(p-bar, X), E at rest; calculated correction factor in atomic level widths. Anti-protonic atoms.


1992WY01      Z.Phys. A344, 117 (1992)

S.Wycech, A.M.Green

Antiprotonic Helium

NUCLEAR STRUCTURE 3,4He; calculated anti-protonic level widths, shifts. Multiple scattering formalism, correct treatment of nucleon number, correlations.

ATOMIC PHYSICS 3,4He; calculated anti-protonic level widths, shifts. Multiple scattering formalism, correct treatment of nucleon number, correlations.

doi: 10.1007/BF01291028
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1991GR17      Phys.Lett. 265B, 223 (1991)

A.M.Green, B.Moussallam, J.A.Niskanen, M.E.Sainio, S.Wycech

Violation of G-Parity in Antinucleon-Nucleon Annihilation

NUCLEAR REACTIONS 1H(n-bar, π+π0), E at 0.39 GeV/c; calculated σ asymmetry. G-parity violation.

doi: 10.1016/0370-2693(91)90045-R
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1991LI21      Phys.Lett. 260B, 15 (1991)

G.Q.Liu, J.-M.Richard, S.Wycech

Simple Approaches to Antiprotonic Deuterium

ATOMIC PHYSICS 2H(p-bar, p-bar), E at rest; calculated antiprotonic deuterium level shift, width. Simple potential model.

doi: 10.1016/0370-2693(91)90962-P
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1990WY01      Z.Phys. A335, 355 (1990)

S.Wycech, H.Poth, J.R.Rook

On the Fine-Structure Splitting in p(bar) Atoms

NUCLEAR REACTIONS 174Yb(p-bar, X), E at rest; calculated antiprotonic level shifts, widths.

ATOMIC PHYSICS 174Yb(p-bar, X), E at rest; calculated antiprotonic level shifts, widths.


1990WY03      Phys.Lett. 252B, 27 (1990)

S.Wycech, G.Q.Liu, A.M.Green

On the E2-Resonance in Antiprotonic 148Nd

NUCLEAR REACTIONS 148Nd(p-bar, X), E not given; analyzed data; deduced limitations on anti-protonic level shifts, widths.

ATOMIC PHYSICS 148Nd(p-bar, X), E not given; analyzed data; deduced limitations on anti-protonic level shifts, widths.

doi: 10.1016/0370-2693(90)91074-L
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1989LI12      Nucl.Phys. A495, 622 (1989)

G.Q.Liu, A.M.Green, S.Wycech

The Effect of the Continuum States on the Dynamic E2 Mixing in Antiprotonic Atoms

ATOMIC PHYSICS 174Yb; calculated antiprotonic atom transition energies; deduced continuum states role. Green function method.

doi: 10.1016/0375-9474(89)90364-3
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1988GR13      Nucl.Phys. A483, 619 (1988)

A.M.Green, G.Q.Liu, S.Wycech

The Effect of a Deformed Nucleus in Antiprotonic Atoms

NUCLEAR STRUCTURE 174Yb; calculated nuclear deformation role in anti-protonic level energies.

doi: 10.1016/0375-9474(88)90087-5
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1987GR20      Nucl.Phys. A467, 744 (1987)

A.M.Green, S.Wycech

Widths of 4f Antiprotonic Levels in the Oxygen Region

NUCLEAR STRUCTURE 14N, 16,17,18O, 19F, 23Na; calculated 4f antiprotonic level widths. Dover-Richard nucleon-antinucleon potential.

doi: 10.1016/0375-9474(87)90394-0
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1985WY01      Phys.Lett. 152B, 308 (1985)

S.Wycech, A.M.Green, J.A.Niskanen

On the Energy Levels in Antiprotonic Deuterium

ATOMIC PHYSICS 2H(p-bar, p-bar), E at rest; calculated antiprotonic level shifts, Γ. Separable potentials.

doi: 10.1016/0370-2693(85)90501-5
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1983GR11      Nucl.Phys. A399, 307 (1983)

A.Green, W.Stepien-Rudzka, S.Wycech

Atomic Antiproton States in 16O, 18O, 32S, 40Ca, 44Ca, and 122Sn

ATOMIC PHYSICS 16,18O, 32S, 40,44Ca, 122Sn; calculated antiprotonic atomic state level shifts, widths. Nucleon-antinucleon based optical potential.

doi: 10.1016/0375-9474(83)90251-8
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1972RO11      Phys.Lett. 39B, 469 (1972)

J.R.Rook, S.Wycech

Energy Shifts and Widths of K--mesic Atom Levels

doi: 10.1016/0370-2693(72)90320-6
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1969MO19      Phys.Letters 30B, 223 (1969)

P.Moller, S.G.Nilsson, A.Sobiczewski, Z.Szymanski, S.Wycech

Nonperturbative Treatment of the P3 Degree of Freedom of the Nuclear Potential at Equilibrium and Fission Distortions

NUCLEAR STRUCTURE 236U, 244Cm, 252Fm; calculated energy surface, octupole stiffness parameter. Strutinsky method.

doi: 10.1016/0370-2693(69)90422-5
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1969NI13      Nucl.Phys. A131, 1 (1969)

S.G.Nilsson, C.F.Tsang, A.Sobiczewski, Z.Szymanski, S.Wycech, C.Gustafson, I.-L.Lamm, P.Moller, B.Nilsson

On the Nuclear Structure and Stability of Heavy and Superheavy Elements

doi: 10.1016/0375-9474(69)90809-4
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1969WY02      Izv.Akad.Nauk SSSR, Ser.Fiz. 33, 1263 (1969); Bull.Acad.Sci.USSR, Phys.Ser. 33, 1169 (1970)

S.Wycech, A.Sobiczewski, Z.Szymanski, S.G.Nilsson, J.R.Nix, H.F.Tsang, C.Gustafson, P.Moller, B.Nilsson

Microscopic Values for the Mass Parameter of Heavy and Superheavy Nuclei

NUCLEAR STRUCTURE 228,230,232,234Th, 230,232,234,236,238,240U, 234,236,238,240,242,244,246Pu, 238,240,242,244,246,248,250,252Cm, 244,246,248,250,252,254,256Cf, 248,250,252,254,256,258,260Fm, 250,252,254,256,258No, 258,260,262Rf; calculated mass parameter.


1968MO30      Phys.Lett. B 26, 418 (1968)

P.Moller, B.Nilsson, S.G.Nilsson, A.Sobiczewski, Z.Szymanski, S.Wycech

Hexadecapole equilibrium distortions of nuclei

NUCLEAR STRUCTURE 230,232Th, 234,236,238U, 236,238,240,242Pu, 242,244,246,248Cm, 248,250,252Cf, 252,254Fm, 262No, 266Rf, 270,272Sg; calculated hexadecapole deformation parameters with nuclear deformed shell model. Comparison with available data.

doi: 10.1016/0370-2693(68)90582-0
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