The γ decay in the quasicontinuum from selected configurations of the rotational nucleus 163Er has been measured with the EUROBALL array. A new analysis technique has allowed for the first time to directly measure the compound and rotational damping widths Γμ and Γrot. Values of Γμ≈20 keV and Γrot≈200 keV are obtained in the spin region I≈30–40ℏ︀, in good agreement with microscopic cranked shell model calculations. A dependence of Γμ and Γrot on the K-quantum number of the nuclear states is also presented.
Compound and rotational damping in warm deformed rare-earth nuclei / S. Leoni, M. Matsuo, A. Bracco, G. Benzoni, N. Blasi, F. Camera, C. Grassi, B. Million, A. Paleni, M. Pignanelli, E. Vigezzi, O. Wieland, T. Døssing, B. Herskind, G.B. Hagemann, J. Wilson, A. Maj, M. Kmiecik, G. Lo Bianco, C. M. Petrache, M. Castoldi, A. Zucchiati, G. De Angelis, D. Napoli, P. Bednarczyk, D. Curien. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 93:2(2004), pp. 022501.1-022501.4. [10.1103/PhysRevLett.93.022501]
Compound and rotational damping in warm deformed rare-earth nuclei
S. Leoni;A. Bracco;F. Camera;A. Paleni;M. Pignanelli;
2004
Abstract
The γ decay in the quasicontinuum from selected configurations of the rotational nucleus 163Er has been measured with the EUROBALL array. A new analysis technique has allowed for the first time to directly measure the compound and rotational damping widths Γμ and Γrot. Values of Γμ≈20 keV and Γrot≈200 keV are obtained in the spin region I≈30–40ℏ︀, in good agreement with microscopic cranked shell model calculations. A dependence of Γμ and Γrot on the K-quantum number of the nuclear states is also presented.
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