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AbstractAbstract
[en] We discuss an often overlooked property of the interacting boson model in its simplest version. From a pure group theoretical treatment the IBM-1 has five instead of three dynamical symmetries. The origin and consequences of the two additional symmetries are presented. (author)
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Source
International conference on the physics of nuclear structure at the extremes; Lewes, Sussex (United Kingdom); 17-19 Jun 1998; Refs
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Journal Article
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Conference
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Journal of Physics. G, Nuclear and Particle Physics (Online); ISSN 1361-6471;
; v. 25(4); p. 843-845

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AbstractAbstract
[en] The interacting boson model is first defined mathematically and then its two possible physical interpretations are discussed. The role of the neutron/proton degree of freedom is described. Brief mention is made of the extension to odd nuclei and finally an example of the mapping from a shell model calculation onto tne IBM is given
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Capture gamma-ray spectroscopy conference; Knoxville, TN (USA); 10-14 Sep 1984; CONF-840906--
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AbstractAbstract
[en] A procedure for calculating the effective number of bosons in the Interacting Boson Model is proposed. As an example, a calculation is presented for the 50-82 major shell for protons in which there is a subshell closure at Z = 64. (orig.)
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Source
CONTRACT PHY-80-17605; CODEN: PYLBA.
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Journal Article
Journal
Phys. Lett., B; ISSN 0370-2693;
; v. 127(3/4); p. 144-146

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Chen, Xue Jun; Morrison, I.; Amos, K.
11th AINSE nuclear physics conference, 3rd-5th February 1986, School of Physics - Laby Theatre, University of Melbourne1986
11th AINSE nuclear physics conference, 3rd-5th February 1986, School of Physics - Laby Theatre, University of Melbourne1986
AbstractAbstract
No abstract available
Primary Subject
Source
Australian Inst. of Nuclear Science and Engineering, Lucas Heights; 104 p; 1986; p. 21; 11. AINSE nuclear physics conference; Melbourne (Australia); 3-5 Feb 1986; Abstract only.
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Miscellaneous
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Conference
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AbstractAbstract
[en] The explicit expression of the seniority particle operator and its properties in the quasi-spin theory of nuclear physics is presented in this paper. The seniority particle operator can be used to construct D-pair in the microscopic theory of interacting boson model to avoid the seniority mixing problem.
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Source
Available from http://dx.doi.org/10.1088/0253-6102/46/5/029; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Communications in Theoretical Physics; ISSN 0253-6102;
; v. 46(5); p. 909-913

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AbstractAbstract
[en] The interacting-boson--model parameters are examined from a shell-model viewpoint with use of the generalized seniority scheme in two nondegenerate j shells. Predictions for the interacting-boson--model parameters are obtained by constructing the boson image of the corresponding fermion operator and found to be in good overall agreement with the empirically determined values
Primary Subject
Record Type
Journal Article
Journal
Physical Review Letters; ISSN 0031-9007;
; v. 46(23); p. 1504-1507

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Barrett, B.R.; Diallo, A.F.; Davis, E.D.
Washington Univ., Seattle, WA (United States). Inst. for Nuclear Theory. Funding organisation: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)1994
Washington Univ., Seattle, WA (United States). Inst. for Nuclear Theory. Funding organisation: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)1994
AbstractAbstract
[en] Probably not, but the authors present phenomenological evidence that the strength of this term necessary to reproduce collective M1-transition strength data could be significantly smaller than is conventionally assumed and therefore more in line with naive microscopic considerations. They also find that g-boson effects are important to the reproduction of the summed M1 strength
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Secondary Subject
Source
1994; 19 p; CONTRACT FG06-90ER40561; Also available from OSTI as DE94017578; NTIS; US Govt. Printing Office Dep
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Report
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AbstractAbstract
[en] This contribution reviews the symmetry properties of the interacting boson model of Arima and Iachello. While the concept of a dynamical symmetry is by now a familiar one, this is not necessarily so for the extended notions of partial dynamical symmetry and quasi dynamical symmetry, which can be beautifully illustrated in the context of the interacting boson model. The main conclusion of the analysis is that dynamical symmetries are scarce while their partial and quasi extensions are ubiquitous. (authors)
Primary Subject
Source
Available from doi: http://dx.doi.org/10.1007/s11467-018-0833-8; Country of input: France
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Journal Article
Journal
Frontiers of Physics (Print); ISSN 2095-0462;
; v. 13(no.6); p. 1-10

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AbstractAbstract
[en] The role of dynamic symmetries in physics is discussed, with particular emphasis to nuclear structure physics. The dynamic symmetries of the interacting boson model, with dynamic algebra U(6), are introduced and experimental examples are presented. Dynamic symmetries provide a classification scheme for even-even nuclei. Symmetries are further enlarged to supersymmetries, involving both fermionic and bosonic degrees of freedom. The dynamic supersymmetries of the interacting boson-fermion model, with dynamic superalgebra U(6/Ω), where Ω is the dimension of the fermionic space, are introduced and experimental examples presented. Supersymmetries provide a classification scheme for odd-even, even-odd and odd-odd nuclei
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1993 joint meeting of the American Physical Society and the American Association of Physics Teachers; Washington, DC (United States); 12-15 Apr 1993; CONF-9304297--
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AbstractAbstract
[en] Microscopic calculations of the parameters of the quadrupole operator of the Interacting Bose-Fermi Approximation are reported for the realistic case in which the valence orbits are nondegenerate. The results of these exact calculations are compared with those of an approximate formalism and in general reasonable agreement is found. (orig.)
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Source
CONTRACT PHY-8017605; PHY-8015342; CODEN: PYLBA.
Record Type
Journal Article
Journal
Phys. Lett., B; ISSN 0370-2693;
; v. 120(1-3); p. 9-13

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