Data di Pubblicazione:
2004
Citazione:
Violation and persistence of the K-quantum number in warm rotating nuclei / M. Matsuo, T. Dossing, A. Bracco, G. B. Hagemann, B. Herskind, S. Leoni, E. Vigezzi. - In: NUCLEAR PHYSICS. A. - ISSN 0375-9474. - 736:3/4(2004), pp. 223-240. [10.1016/j.nuclphysa.2004.03.004]
Abstract:
The validity of the K-quantum number in rapidly rotating warm nuclei is investigated as a function of thermal excitation energy U and angular momentum I, for the rare-earth nucleus 163Er. The quantal eigenstates are described with a shell model which combines a cranked Nilsson mean-field and a residual two-body interaction, together with a term which takes into account the angular momentum carried by the K-quantum number in an approximate way. K-mixing is produced by the interplay of the Coriolis interaction and the residual interaction; it is weak in the region of the discrete rotational bands (Uless, approximate1 MeV), but it gradually increases until the limit of complete violation of the K-quantum number is approached around Unot, vert, similar2–2.5 MeV. The calculated matrix elements between bands having different K-quantum numbers decrease exponentially as a function of ΔK, in qualitative agreement with recent data.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
K-quantum number ; compound states ; warm rotating nuclei ; band crossings ; residual interaction ; quasi-continuum gamma spectra
Elenco autori:
M. Matsuo, T. Dossing, A. Bracco, G.B. Hagemann, B. Herskind, S. Leoni, E. Vigezzi
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