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On some spectral properties of billiards and nuclei—similarities and differences

Richter, A. :
On some spectral properties of billiards and nuclei—similarities and differences.
[Online-Edition: http://dx.doi.org/10.1088/0031-8949/2006/T125/038]
In: Physica Scripta, T125 p. 167. ISSN 0031-8949
[Article] , (2006)

Official URL: http://dx.doi.org/10.1088/0031-8949/2006/T125/038
Item Type: Article
Erschienen: 2006
Creators: Richter, A.
Title: On some spectral properties of billiards and nuclei—similarities and differences
Language: English
Journal or Publication Title: Physica Scripta
Volume: T125
Divisions: DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > C: Fundamentale Experimente
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > C: Fundamentale Experimente > C4: Quantenchaos und wellendynamisches Chaos
Date Deposited: 20 Jun 2011 07:12
Official URL: http://dx.doi.org/10.1088/0031-8949/2006/T125/038
Identification Number: doi:10.1088/0031-8949/2006/T125/038
Alternative Abstract:
Alternative abstract Language
Generic and non-generic features of billiards and nuclei which show up in certain spectral properties are discussed by way of selected examples. Firstly, the short- and long-range correlations of levels belonging to the magnetic dipole Scissors Mode in heavy deformed nuclei at an excitation energy of about 3 MeV prove that this mode is indeed caused by an ordered or regular collective motion. Secondly, the fine structure distribution of the so-called electric Pygmy Dipole Resonance around 6-7 MeV excitation energy seems to indicate a situation where the spectral properties are governed by mixed dynamics, i.e. by regular and chaotic features. However, in nuclei quantitative conclusions are always severely hampered by missing levels due to limited experimental resolution and detector efficiency. Thirdly, it is shown that this situation can be largely overcome by studying spectral properties in superconducting microwave billiards considered as nuclear analogues. As an example resonance strength distributions in billiards of mixed and fully chaotic dynamics are considered. Finally, it is demonstrated how symmetry breaking effects in nuclei--e.g. isospin symmetry breaking--can be studied through those resonance strength distributions by modelling the nuclear problem with coupled billiards.English
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