Fluctuation properties of strength function associated with the giant quadrupole resonance in 208Pb

Details Fluctuation properties of strength function associated with the giant quadrupole resonance in 208Pb Fluctuation properties of strength function associated with the giant quadrupole resonance in 208Pb

2009-06-26

arxiv.org/abs/0906.4831v1

Phys.Rev.C83:024314,2011

Physics

Nuclear Physics

Nuclear Theory

10 pages, 14 figures, submitted to Physical Review C

Scientific paper

10.1103/PhysRevC.83.024314

We performed fluctuation analysis by means of the local scaling dimension for the strength function of the isoscalar (IS) giant quadrupole resonance (GQR) in 208Pb where the strength function is obtained by the shell model calculation including 1p1h and 2p2h configurations. It is found that at almost all energy scales, fluctuation of the strength function obeys the Gaussian orthogonal ensemble (GOE) random matrix theory limit. This is contrasted with the results for the GQR in 40Ca, where at the intermediate energy scale about 1.7 MeV a deviation from the GOE limit was detected. It is found that the physical origin for this different behavior of the local scaling dimension is ascribed to the difference in the properties of the damping process.

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