To study the order-to-chaos transition in nuclei we investigate the validity of the K-quantum number in the excited rapidly rotating Er-163 nucleus, analyzing the variance and covariance of the spectrum fluctuations of gamma-cascades feeding into low-K and high-K bands. The data are compared to simulated spectra obtained using a microscopic cranked shell model. K-selection rules are found to be obeyed for decay along excited unresolved rotational bands of internal excitation energy up to around 1.2 MeV and angular momenta 20h <= I <= 40h. At higher internal energy, from about 1.2 to 2.5 MeV, the selection rules are found to be only partially valid. (c) 2005 Elsevier B.V. All rights reserved.
Is the K-quantum number conserved in the order-to-chaos transition region? / G. Benzoni, A. Bracco, S. Leoni, N. Blasi, F. Camera, C. Grassi, B. Million, A. Paleni, M. Pignanelli, E. Vigezzi, O. Wieland, M. Matsuo , T. Dossing, 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: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 615:3-4(2005 Jun), pp. 160-166.
Is the K-quantum number conserved in the order-to-chaos transition region?
A. Bracco;S. Leoni;F. Camera;A. Paleni;M. Pignanelli;
2005
Abstract
To study the order-to-chaos transition in nuclei we investigate the validity of the K-quantum number in the excited rapidly rotating Er-163 nucleus, analyzing the variance and covariance of the spectrum fluctuations of gamma-cascades feeding into low-K and high-K bands. The data are compared to simulated spectra obtained using a microscopic cranked shell model. K-selection rules are found to be obeyed for decay along excited unresolved rotational bands of internal excitation energy up to around 1.2 MeV and angular momenta 20h <= I <= 40h. At higher internal energy, from about 1.2 to 2.5 MeV, the selection rules are found to be only partially valid. (c) 2005 Elsevier B.V. All rights reserved.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
