Damping of rotational motion

Lauritzen, Bent; Døssing, T.; Broglia, R.A.

doi:10.1016/0375-9474(86)90519-1

Cited by 140 publications

(147 citation statements)

References 27 publications

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“…If Γ µ is larger than ∆ω (the strong coupling limit), the doorway picture is lost, and one is in the region of the "motional narrowing" of the damping width. In this limit, the rotational damping width is estimated to be Γ rot ∝ ∆ω 2 /Γ µ [2].…”

Section: Rotational Damping and Doorway States Of Damped Etransitionsmentioning

confidence: 99%

“…Using the cranked shell model [2,5,7], the energy eigenstates (energy levels) at spin I are described as linear superpositions of basis cranked np-nh configurations |µ(I)…”

Section: Rotational Damping and Doorway States Of Damped Etransitionsmentioning

confidence: 99%

“…The collective rotation of deformed nuclei becomes a damped motion as the nuclei are thermally excited [1,2,3,4]. It is known that the levels near the yrast line form rotational band structures based on simple configurations which are well described by cranked mean-field models.…”

Section: Introductionmentioning

confidence: 99%

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Microscopic structure of rotational damping

et al. 1999

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The damping of collective rotational motion is studied microscopically, making use of shell model calculations based on the cranked Nilsson deformed mean-field and on residual two-body interactions, and focusing on the shape of the gamma-gamma correlation spectra and on its systematic behavior. It is shown that the spectral shape is directly related to the damping width of collective rotation, Γ rot , and to the spreading width of many-particle many-hole configurations, Γ µ . The rotational damping width is affected by the shell structure, and is very sensitive to the position of the Fermi surface, besides mass number, spin and deformation. This produces a rich variety of features in the rotational damping phenomena. * A talk presented by M.M. at

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Section: Rotational Damping and Doorway States Of Damped Etransitionsmentioning

confidence: 99%

“…Using the cranked shell model [2,5,7], the energy eigenstates (energy levels) at spin I are described as linear superpositions of basis cranked np-nh configurations |µ(I)…”

Section: Rotational Damping and Doorway States Of Damped Etransitionsmentioning

confidence: 99%

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Microscopic structure of rotational damping

et al. 1999

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“…At higher excitation energy above the yrast line, it does not necessarily form rotational band structure due to the damping of collective rotational motion [1,2]. When the rotational damping takes place, E2 transition from an excited state spreads out over many final states.…”

Section: Introductionmentioning

confidence: 99%

“…Since different configurations respond differently to the Coriolis force, the configuration mixing results in a dispersion of rotational frequency within each energy eigenstate, implying a damping of the collective rotational motion. However, in these works [1,2,16,17], the assumption that configuration mixing is described by the general statistical theory of random matrices has been used to treat the E2 strength function associated with the damped rotational motion.…”

Section: Introductionmentioning

confidence: 99%

Rotational damping in a multi-j shell particles-rotor model

et al. 2005

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The damping of collective rotational motion is investigated by means of particles-rotor model in which the angular momentum coupling is treated exactly and the valence nucleons are in a multi-j shell mean-field. It is found that the onset energy of rotational damping is around 1.1 MeV above yrast line, and the number of states which form rotational band structure is thus limited. The number of calculated rotational bands around 30 at a given angular momentum agrees qualitatively with experimental data. The onset of rotational damping takes place gradually as a function of excitation energy. It is shown that the pairing correlation between valence nucleons has a significant effect on the appearance of rotational damping.

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Gammasphere

Lee

1990

Exotic Nuclear Spectroscopy

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Damping of rotational motion

Cited by 140 publications

References 27 publications

Microscopic structure of rotational damping

Microscopic structure of rotational damping

Rotational damping in a multi-j shell particles-rotor model

Gammasphere

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