Quantum choas and rotational damping
(1992) In Progress in Particle and Nuclear Physics 28(C). p.11-47- Abstract
The appearence of quantum chaos in the excited rapidly rotating nucleus is studied in a simple nuclear model, consisting of the cranked Nilsson model with a schematic two-body interaction added. Chaos is found to smoothly set in at a much lower excitation energy in normal-deformed 168Yb than in superdeformed 152Dy. A dynamical sign of chaos is a saturation of the standard deviation of the E2-strength function, and also the disapearence of correlations in γ-γ-correlations. Motional narrowing may however restore the correlations also for the completely chaotic case. The distribution of E2-matrix elements strongly deviate from Porter-Thomas result, and many more strong γ-transitions appear than expected from... (More)
The appearence of quantum chaos in the excited rapidly rotating nucleus is studied in a simple nuclear model, consisting of the cranked Nilsson model with a schematic two-body interaction added. Chaos is found to smoothly set in at a much lower excitation energy in normal-deformed 168Yb than in superdeformed 152Dy. A dynamical sign of chaos is a saturation of the standard deviation of the E2-strength function, and also the disapearence of correlations in γ-γ-correlations. Motional narrowing may however restore the correlations also for the completely chaotic case. The distribution of E2-matrix elements strongly deviate from Porter-Thomas result, and many more strong γ-transitions appear than expected from GOE-theory. Transition entropy is introduced as a measure of order in the E2 cascade.
(Less)
- author
- Åberg, S. LU
- organization
- publishing date
- 1992
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- GOE-analyses, high spin, motional narrowing, Quantum chaos, rotational damping, superdeformation, transition entropy, γ-γ-correlations
- in
- Progress in Particle and Nuclear Physics
- volume
- 28
- issue
- C
- pages
- 37 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:0003137394
- ISSN
- 0146-6410
- DOI
- 10.1016/0146-6410(92)90012-Q
- language
- English
- LU publication?
- yes
- id
- a25aabd8-79ea-4bda-b6b6-6871021543d0
- date added to LUP
- 2025-09-02 14:44:40
- date last changed
- 2025-10-14 09:58:41
@article{a25aabd8-79ea-4bda-b6b6-6871021543d0,
abstract = {{<p>The appearence of quantum chaos in the excited rapidly rotating nucleus is studied in a simple nuclear model, consisting of the cranked Nilsson model with a schematic two-body interaction added. Chaos is found to smoothly set in at a much lower excitation energy in normal-deformed <sup>168</sup>Yb than in superdeformed <sup>152</sup>Dy. A dynamical sign of chaos is a saturation of the standard deviation of the E2-strength function, and also the disapearence of correlations in γ-γ-correlations. Motional narrowing may however restore the correlations also for the completely chaotic case. The distribution of E2-matrix elements strongly deviate from Porter-Thomas result, and many more strong γ-transitions appear than expected from GOE-theory. Transition entropy is introduced as a measure of order in the E2 cascade.</p>}},
author = {{Åberg, S.}},
issn = {{0146-6410}},
keywords = {{GOE-analyses; high spin; motional narrowing; Quantum chaos; rotational damping; superdeformation; transition entropy; γ-γ-correlations}},
language = {{eng}},
number = {{C}},
pages = {{11--47}},
publisher = {{Elsevier}},
series = {{Progress in Particle and Nuclear Physics}},
title = {{Quantum choas and rotational damping}},
url = {{http://dx.doi.org/10.1016/0146-6410(92)90012-Q}},
doi = {{10.1016/0146-6410(92)90012-Q}},
volume = {{28}},
year = {{1992}},
}