Is the K-quantum number conserved in the order-to-chaos transition region? - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physics Letters B Year : 2005

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

D. Napolih
  • Function : Author
G. Benzoni
A. Bracco
  • Function : Author
S. Leoni
N. Blasi
  • Function : Author
F. Camera
  • Function : Author
C. Grassi
  • Function : Author
B. Million
  • Function : Author
A. Paleni
  • Function : Author
M. Pignanelli
  • Function : Author
E. Vigezzi
  • Function : Author
O. Wieland
  • Function : Author
M. Matsuo
  • Function : Author
T. Døssing
  • Function : Author
B. Herskind
  • Function : Author
G.B. Hagemann
  • Function : Author
J. Wilson
  • Function : Author
A. Maj
M. Kmiecik
  • Function : Author
G. Lo Bianco
  • Function : Author
C.M. Petrache
  • Function : Author
M. Castoldi
  • Function : Author
A. Zucchiati
  • Function : Author
G. de Angelis
  • Function : Author
D. Napoli
D. Curien

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.

Dates and versions

in2p3-00095929 , version 1 (18-09-2006)

Identifiers

Cite

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, 2005, 615, pp.160-166. ⟨10.1016/j.physletb.2004.12.083⟩. ⟨in2p3-00095929⟩
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