1993年11月
POISSON AND PORTER-THOMAS FLUCTUATIONS IN OFF-YRAST ROTATIONAL TRANSITIONS
NUCLEAR PHYSICS A
- ,
- ,
- ,
- 巻
- 564
- 号
- 3
- 開始ページ
- 345
- 終了ページ
- 365
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1016/0375-9474(93)90509-V
- 出版者・発行元
- ELSEVIER SCIENCE BV
Fluctuations associated with stretched E2 transitions from high-spin levels in nuclei around Yb-168 are investigated by a cranked shell model extended to include residual two-body interactions. In the cranked mean-field model without residual interactions, it is found that gamma-ray energies behave like random variables and the energy spectra show Poisson fluctuation. With two-body residual interactions included, the discrete transition pattern with unmixed rotational bands is still valid up to around 600 keV above yrast, in good agreement with experiments. At higher excitation energy, a gradual onset of rotational damping emerges. At 1.8 MeV above yrast, complete damping is observed with GOE-type fluctuations for both energy levels and transition strengths (Porter-Thomas fluctuations).
- リンク情報
- ID情報
-
- DOI : 10.1016/0375-9474(93)90509-V
- ISSN : 0375-9474
- Web of Science ID : WOS:A1993MJ58100002