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Is the K-quantum number conserved in the order-to-chaos transition region?

Abstract : To study the order-to-chaos transition in nuclei we investigate the validity of the K-quantum number in the excited rapidly rotating $^{163}$Er 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 $20\hbar \leq I \leq 40\hbar$. At higher internal energy, from about 1.2 to 2.5 MeV, the selection rules are found to be only partially valid.
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http://hal.in2p3.fr/in2p3-00095929
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Submitted on : Monday, September 18, 2006 - 3:28:58 PM
Last modification on : Tuesday, May 4, 2021 - 11:26:08 AM

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D. Napolih, G. Benzoni, A. Bracco, S. Leoni, N. Blasi, et al.. Is the K-quantum number conserved in the order-to-chaos transition region?. Physics Letters B, Elsevier, 2005, 615, pp.160-166. ⟨10.1016/j.physletb.2004.12.083⟩. ⟨in2p3-00095929⟩

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