Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-01-28
Phys.Rev. C69 (2004) 067301
Physics
Nuclear Physics
Nuclear Theory
4 pages, 4 figures, submitted to Physical Review C
Scientific paper
10.1103/PhysRevC.69.067301
We investigate a random matrix model [Phys. Rev. C {\bf 65} 024302 (2002] for the decay-out of a superdeformed band as a function of the parameters: $\Gamma^\downarrow/\Gamma_S$, $\Gamma_N/D$, $\Gamma_S/D$ and $\Delta/D$. Here $\Gamma^\downarrow$ is the spreading width for the mixing of an SD state $|0>$ with a normally deformed (ND) doorway state $|d>$, $\Gamma_S$ and $\Gamma_N$ are the electromagnetic widths of the the SD and ND states respectively, $D$ is the mean level spacing of the compound ND states and $\Delta$ is the energy difference between $|0>$ and $|d>$. The maximum possible effect of an order-chaos transition is inferred from analytical and numerical calculations of the decay intensity in the limiting cases for which the ND states obey Poisson and GOE statistics. Our results show that the sharp attenuation of the decay intensity cannot be explained solely by an order-chaos transition.
Hussein Mahir S.
Pato M. P.
Sargeant A. J.
Takigawa Noboru
Ueda Masahito
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