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During the week of June 6-9, 1978, a group of 36 physicists from 15 countries met in Erice, Sicily, for the first specialized seminar on "Interacting Bosons in Nuclear Physics". The countries represented were Argentina, Belgium, Denmark, Finland, France, the Federal Republic of Germany, Israel, Italy, Japan, the Netherlands, Poland, Sweden, the United Kingdom, the United States of America and Yugoslavia. The Seminar was sponsored by the Italian Ministry of Public Education (MPI), the Italian Ministry of Scientific and Technological Research (MRST), the North Atlantic Treaty Organiza tion (NATO) and the Regional Sicilian Government (ERS). The purpose of the Seminar was to discuss the present status of the Interacting Boson Model both from the theoretical and experi mental point of view. Some of the lectures presented in this book summarize particular aspects of the model and are based on previously published work (F. Iachello, R. F. Casten, Z. Sujkowski, L. Hassel gren, H. Emling, I. Talmi, T. Otsuka, J. McGrory, A.E.L. Dieperink and A. Arima). Others are entirely new. In particular, the lec tures of O. Scholten and A. Gelberg and V. Kaup present the first extensive set of calculations based on the proton-neutron boson model, while the lecture of J.N.Ginocchio describes a fermion model with properties identical to those of the interacting boson model. Also new are the le~tures of D. R. Bes, R. A. Broglia and P. F.
List of contents
1. Introduction.- 1.a. Present Status of the Interacting Boson Model.- 2. Phenomenology and Symmetries of the Interacting Boson Model.- 2.a. A Phenomenological Study of Even-Even Nuclei in the Neutron-Proton IBA.- 2.b. The IBA in the Os-Pt Region.- 2.c. A?150 Transitional Region and the Interacting Boson Model.- 2.d. Collective States in Some Transitional Nuclei with 28?Z, N?50.- 2.e. Systematics of Experimental Properties of Low-Lying States in Even Ru and Pd Nuclei.- 2.f. B(E2)-Values of High Spin States in 158Dy.- 3. Microscopic Theory of The Interacting Boson Model.- 3.a. Shell Model Description of Interacting Bosons.- 3.b. Nuclear Shell Model and Interacting Bosons.- 3.c. Fermion Hamiltonians with Monopole and Quadrupole Pairing.- 3.d. Shell Model Tests of the Interacting Boson Model Description of Nuclear Collective Motion.- 4. Applications to Reactions.- 4.a. Electron Scattering in the Interacting Boson Model.- 5. Relation to other Models.- 5.a. Nuclear Field Theory Treatment of the Interacting Boson Model.- 5.b. On the Interaction of Many-Phonon Monopole Pairing Vibrations.- 5.c. On the Relation Between the 0(6) Limit of the Interacting Boson Model and Triaxial Nuclear Models.- 5.d. IBM Versus Quadrupole Phonons.- 6. Conclusions.- 6.a. General Remarks Regarding the Interacting Boson Model and Approximation.- 6.b. Concluding Remarks.- Participants.
