Thermal Pairing and Giant Dipole Resonance in Highly Excited Nuclei
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Published: 2015
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Published: 2015
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DOWNLOAD EBOOKAuthor: Easwar Ramakrishnan
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Published: 1995
Total Pages: 264
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DOWNLOAD EBOOKAuthor: Andre Stolk
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Published: 1988
Total Pages: 149
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DOWNLOAD EBOOKAuthor: Michael Robert Thoennessen
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Published: 1988
Total Pages: 262
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DOWNLOAD EBOOKAuthor: P.F. Bortigan
Publisher: Taylor & Francis
Published: 2023-05-31
Total Pages: 290
ISBN-13: 1000940667
DOWNLOAD EBOOKThe series of volumes, Contemporary Concepts in Physics, is addressed to the professional physicist and to the serious graduate student of physics. The subject of many-body systems constitutes a central chapter in the study of quantum mechanics, with applications ranging from elementary particle and condensed matter physics to the behaviour of compact stellar objects. Quantal size effects is one of the most fascinating facets of many-body physics; this is testified to by the developments taking place in the study of metallic clusters, fullerenes, nanophase materials, and atomic nuclei. This book is divided into two main parts: the study of giant resonances based on the atomic nucleus ground state (zero temperature), and the study of the y-decay of giant resonances from compound (finite temperature) nuclei.
Author: Brian Andrew Cole
Publisher:
Published: 1985
Total Pages: 130
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Published: 2006
Total Pages: 6
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DOWNLOAD EBOOKThe [gamma] decay of the Giant Dipole Resonance in the 132Ce compound nucleus with temperature up to ≈ 4 MeV has been measured. The symmetric 64Ni + 68Zn at E{sub beam} = 300, 400, 500 MeV and the asymmetric reaction 16O + 116Sn at E{sub beam} = 130, 250 MeV have been investigated. Light charged particles and [gamma] rays have been detected in coincidence with the recoiling compound system. In the case of the mass symmetric 64Ni induced reaction the [gamma] and charged particle spectral shapes are found to be consistent with the emission from a fully equilibrated compound nuclei and the GDR parameters are extracted from the data using a statistical model analysis. The GDR width is found to increase almost linear with temperature. This increase is rather well reproduced within a model which includes both the thermal fluctuation of the nuclear shape and the lifetime of the compound nucleus.
Author: Dinh Dang Nguyen
Publisher:
Published: 2003
Total Pages: 17
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Published: 1995
Total Pages: 8
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DOWNLOAD EBOOKA systematic study of the full-width-at-half-maximum (FWHM) of the giant-dipole resonance (GDR) as a function of temperature for the nuclei 12°Sn and 2°8Pb confirms the overall theoretical picture of the GDR in hot nuclei; in particular, the role played by large-amplitude thermal fluctuations of the nuclear shape. This is confirmed by the good agreement between theory and experiment achieved over a range of temperatures from 1.25--32 MeV and by the differences in the behavior of the FWHM for 12°Sn and 2°8Pb, which can be attributed to the presence of strong shell corrections favoring spherical shapes in 2°8Pb that are absent in 12°Sn. Finally, the increase in the FWHM over that expected from thermal averaging at temperatures of the order 3.0 MeV is in accordance with the increase expected from the particle evaporation of the compound system.
Author: Michael Patrick Kelly
Publisher:
Published: 1999
Total Pages: 152
ISBN-13:
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