Decay theory of double giant resonances
نویسندگان
چکیده
منابع مشابه
Coulomb Excitation of Double Giant Dipole Resonances
We implement the Brink–Axel hypothesis for the excitation of the double giant dipole resonance (DGDR): The background states which couple to the one–phonon giant dipole resonance are themselves capable of dipole absorption. These states (and the ones which couple to the two–phonon resonance) are described in terms of the Gaussian Orthogonal Ensemble of random matrices. We use second–order time–...
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We report on the first microscopic study of the properties of two-phonon giant resonances in deformed nuclei. The cross sections of the excitation of the giant dipole and the double giant dipole resonances in relativistic heavy ion collisions are calculated. We predict that the double giant dipole resonance has a one-bump structure with a centroid 0.8 MeV higher than twice energy for the single...
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The dilepton yield from the statistical decay of Giant Resonances built on excited nuclei is discussed. An overview is given of the research leading to the experimental determination of the Giant Monopole Resonance on excited states. The data obtained for Si and Ni, are presented, since they established so far the stringest experimental upper limits for the monopole strength of 0.45 and 4.3 nb,...
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Scaling analysis of nuclear giant resonance transition probabilities with increasing level of complexity in the background states is performed. It is found that the background characteristics, typical for chaotic systems lead to nontrivial multifractal scaling properties. The statistical study of spectra of quantum systems is almost as old as quantum mechanics. In this context, the random-matri...
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We study structure and direct decay of the Giant Monopole Resonance (GMR) at the Random Phase Approximation (RPA) level using the time-dependent energy density functional method in the linear response regime in a few doubly magic nuclei. A proper treatment of the continuum, through the use of large coordinate space, allows for a separation between the nucleus and its emitted nucleons. The micro...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(98)00459-6