2024-03-28T16:27:34Z
https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00038854
2022-04-27T09:58:03Z
3048:122
3:62:5598:5371
Quantal rotation and its coupling to intrinsic motion in nuclei
中務, 孝
Nakatsukasa, Takashi
Matsuyanagi, Kenichi
Matsuzaki, Masayuki
Shimizu, Yoshifumi R
Symmetry breaking is an important concept in nuclear physics and other fields of physics. Self-consistent coupling between the mean-field potential and the single-particle motion is a key ingredient in the unified model of Bohr and Mottelson, which could lead to a deformed nucleus as a consequence of spontaneous breaking of the rotational symmetry. Some remarks on the finite-size quantum effects are given. In finite nuclei, the deformation inevitably introduces the rotation as a symmetry-restoring collective motion (Anderson–Nambu–Goldstone mode), and the rotation affects the intrinsic motion. In order to investigate the interplay between the rotational and intrinsic motions in a variety of collective phenomena, we use the cranking prescription together with the quasiparticle random phase approximation (QRPA). At low spin, the coupling effect can be seen in the generalized intensity relation. A feasible quantization of the cranking model is presented, which provides a microscopic approach to the higher-order intensity relation. At high spin, the semiclassical cranking prescription works well. We discuss properties of collective vibrational motions under rapid rotation and/or large deformation. The superdeformed shell structure plays a key role in emergence of a new soft mode which could lead to instability toward the ${K}^{\pi }={1}^{-}$ octupole shape. A wobbling mode of excitation, which is a clear signature of the triaxiality, is discussed in terms of a microscopic point of view. A crucial role played by the quasiparticle alignment is presented.
journal article
Published by the IOP on behalf of the Royal Swedish Academy of Sciences for the Science Academies and the Physical Societies of the Nordic Countries.
2016-07
application/pdf
Physica scripta
7
91
073008
0031-8949
AA00773442
https://tsukuba.repo.nii.ac.jp/record/38854/files/PS_91-7.pdf
eng
10.1088/0031-8949/91/7/073008
This is an author-created, un-copyedited version of an article accepted for publication/published in Physica scripta. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/0031-8949/91/7/073008