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Statistics of 2(+) levels in even-even nuclei
Faculty
Science
Year:
2004
Type of Publication:
Article
Pages:
278-284
Authors:
SIMBEL, MH, WEIDENMULLER, HA, Abul-Magd, AY, Harney, HL
DOI:
10.1016/j.physletb.2003.07.092
Journal:
PHYSICS LETTERS B ELSEVIER SCIENCE BV
Volume:
579
Research Area:
Physics
ISSN
ISI:000188043200007
Keywords :
Statistics , 2(+) levels , even-even nuclei
Abstract:
Using all the available empirical information, we analyze the spacing distributions of low-lying 2(+) levels of even-even nuclei. To obtain statistically relevant samples, the nuclei are grouped into classes defined by the ratio R-4/2 of the excitation energies of the first 4(+) and 2(+) levels. This ratio serves as a measure of collectivity in nuclei. With the help of Bayesian inference, we determine the chaoticity parameter for each class. This parameter is found to vary strongly with R-4/2 and takes particularly small values in nuclei that have one of the dynamical symmetries of the interacting boson model. (C) 2003 Published by Elsevier B.V.
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