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[en] Until recently there has been no direct phenomenological evidence on the density dependence of the π-nucleus optical potential. This has changed with the recent data on the excited 0+ states which constrain the density dependence and gives strong support for the LLEE effect and the suppression of multiple scattering in the nuclear medium. 15 refs.; 5 figs
Source
Kuo, T.T.S. (State Univ. of New York, Stony Brook (USA). Dept. of Physics); Speth, J. (Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.). Inst. fuer Kernphysik) (eds.); v. 1-2 689 p; ISBN 0-444-87064-4; 
; 1987; v. 2, p. 304-309; North-Holland; Amsterdam (Netherlands); International conference and symposium on unified concepts of many-body problems; Stony Brook, NY (USA); 4-6 Sep 1986
; 1987; v. 2, p. 304-309; North-Holland; Amsterdam (Netherlands); International conference and symposium on unified concepts of many-body problems; Stony Brook, NY (USA); 4-6 Sep 1986
[en] A remarkable difference between the phenomenological and microscopic optical-model potentials (OMP) in the antinucleon-nucleus system has been found and this fact has not analogies in the nucleon-nucleus system. The difference lies mainly in the radial behaviour of the real central OMP in the core region. (author). 30 refs.; 8 figs.; 1 tab
Source
Cherubini, R. (Istituto Nazionale di Fisica Nucleare, Padua (Italy)); Dalpiaz, P. (Istituto Nazionale di Fisica Nucleare, Padua (Italy); Ferrara Univ. (Italy). Ist. di Fisica); Minetti, B. (Istituto Nazionale di Fisica Nucleare, Turin (Italy)) (eds.); 552 p; ISBN 0 444 87486 0; ; 1989; p. 123-150; North-Holland; Amsterdam (Netherlands); 3. Winter school on hadronic physics; Folgaria (Italy); 15-20 Feb 1988
; 1989; p. 123-150; North-Holland; Amsterdam (Netherlands); 3. Winter school on hadronic physics; Folgaria (Italy); 15-20 Feb 1988
No abstract available
Source
Anon; 685 p; ISBN 2-7272-0065-X; ; 1981; p. 180; Commissariat a l'Energie Atomique; Paris, France; 9. International conference on high energy physics and nuclear structure; Versailles, France; 6 - 10 Jul 1981; Available from Laboratoire National Saturne, CEN Saclay, 91191 Gif-sur-Yvette Cedex (France); Published in summary form only.
; 1981; p. 180; Commissariat a l'Energie Atomique; Paris, France; 9. International conference on high energy physics and nuclear structure; Versailles, France; 6 - 10 Jul 1981; Available from Laboratoire National Saturne, CEN Saclay, 91191 Gif-sur-Yvette Cedex (France); Published in summary form only.
[en] The dynamical polarization potential corresponding to simple, physical two-channel model is derived and examined paying particular attention to its analytic properties. This enables us to illustrate explicitly the emergence of the general dispersive and retardation features expected from the imposition of causality. The energy dependence of the potential and the associated nonlocality in time, expressed by its Fourier transform, are explored. A physical interpretation of the time nonlocality in terms of the time delay due to the excitation of the inelastic channel will be given
Journal
[en] This summary begins with some general remarks about what we mean by an optical potential, how it is defined and the ways it can be determined, either microscopically from the nucleon-nucleon interactions, or by phenomenological analysis of the experimental data, or in some intermediate way. The next Section 3 is devoted to the microscopic potentials themselves, both global for a range of nuclei and particular when the properties of particular nuclei are introduced into the calculation. Section 4 considers the ways of adding extra theoretical or phenomenological effective potentials to the standard optical potential to account for a recognized physical effect. Sections 5, 6 and 7 are devoted to new experimental data and phenomenological analyses of nucleon, light and heavy ion interactions, and Section 8 to some concluding remarks. (orig./AH)
[de]
Diese Zusammenfassung beginnt mit einigen allgemeinen Bemerkungen ueber das, was wir als optisches Potential verstehen, wie es definiert ist, und die Art, wie es bestimmt werden kann; entweder mikroskopisch ueber die Nukleon-Nukleon-Wechselwirkung oder ueber eine phaenomenologische Analyse experimenteller Daten oder ueber einen Mittelweg. Der naechste Teil 3 ist den mikroskopischen Potentialen selbst gewidmet, jeweils global fuer einen Bereich von Kernen und speziell wenn die Eigenschaften des einzelnen Kerns in die Berechnung einbezogen werden. Teil 4 betrachtet die Wege, um zusaetzliche theoretische und phaenomenologische effektive Potentiale zum Standard-optischen Potential zuzufuegen, um einem erkannten physikalischen Effekt Rechnung zu tragen. Die Teile 5, 6, 7 sind neueren experimentellen Daten und phaenomenologischen Analysen von Nukleonen, Leicht-und Schwerionenwechselwirkung gewidmet. Teil 8 ist einigen zusammefassenden Bemerkungen gewidmet. (orig./AH)Source
Geramb, H.V. von (ed.); Lecture notes in physics; no. 89; p. 459-489; ISBN 3-540-09106-8; ; 1978; p. 459-489; Springer; Berlin, Germany, F.R; Hamburg topical workshop on microscopic optical potentials; Hamburg, Germany, F.R; 25 - 27 Sep 1978; INKA-CONF--78-304-042
; 1978; p. 459-489; Springer; Berlin, Germany, F.R; Hamburg topical workshop on microscopic optical potentials; Hamburg, Germany, F.R; 25 - 27 Sep 1978; INKA-CONF--78-304-042
[en] The differential cross sections and analyzing powers from the elastic scattering of 25 and 40 MeV protons from many nuclei have been studied. Analyses have been made using a fully microscopic model of proton-nucleus scattering seeking to establish a means appropriate for use in analyses of radioactive beam scattering from hydrogen with ion energies 25A and 40A MeV. (c) 2000 The American Physical Society
Journal
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