dorsal/arxiv
View SchemaPoisson and Porter-Thomas Fluctuations in off-Yrast Rotational Transitions
| Authors | M. Matsuo, T. Døssing, B. Herskind, S. Frauendorf |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9212006 |
| URL | https://arxiv.org/abs/nucl-th/9212006 |
| DOI | 10.1016/0375-9474(93)90509-V |
Abstract
Fluctuations associated with stretched E2 transitions from high spin levels in nuclei around $^{168}$Yb are investigated by a cranked shell model extended to include residual two-body interactions. It is found that the gamma-ray energies behave like random variables and the energy spectra show the Poisson fluctuation, in the cranked mean field model without the residual interaction. With two-body residual interaction included, 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).
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"date_created": "2026-03-02T18:00:11.279000Z",
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"abstract": "Fluctuations associated with stretched E2 transitions from high spin levels\nin nuclei around $^{168}$Yb are investigated by a cranked shell model extended\nto include residual two-body interactions. It is found that the gamma-ray\nenergies behave like random variables and the energy spectra show the Poisson\nfluctuation, in the cranked mean field model without the residual interaction.\nWith two-body residual interaction included, discrete transition pattern with\nunmixed rotational bands is still valid up to around 600 keV above yrast, in\ngood agreement with experiments. At higher excitation energy, a gradual onset\nof rotational damping emerges. At 1.8 MeV above yrast, complete damping is\nobserved with GOE type fluctuations for both energy levels and transition\nstrengths(Porter-Thomas fluctuations).",
"arxiv_id": "nucl-th/9212006",
"authors": [
"M. Matsuo",
"T. D\u00f8ssing",
"B. Herskind",
"S. Frauendorf"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/0375-9474(93)90509-V",
"title": "Poisson and Porter-Thomas Fluctuations in off-Yrast Rotational Transitions",
"url": "https://arxiv.org/abs/nucl-th/9212006"
},
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