RT Journal Article
T1 Experimental evidence of chaos in the bound states of Pb-208
A1 Muñoz Muñoz, Laura
A1 Molina, R. A.
A1 Gómez Gómez, José María
A1 Heusler, A.
AB Theoretical calculations, especially shell-model calculations, have shown a strongly chaotic behavior of bound states at higher excitation energy, in regions of high level density. However, it had not been possible up to now to observe chaos in the experimental bound energy levels of any single nucleus. In this paper we study the spectral fluctuations of the Pb-208 nucleus using the complete experimental spectrum of 151 states up to excitation energies of 6.20 MeV. For natural parity states the results are very close to the predictions of Random Matrix Theory (RMT) for the nearest-neighbor spacing distribution. By contrast, the results for unnatural parity states are far from RMT behavior. We interpret these results as a consequence of the strength of the residual interaction in Pb-208, which, according to experimental data, is much stronger for natural than for unnatural parity states. In addition our results show that chaotic and non-chaotic nuclear states coexist in the same energy region of the spectrum.
PB IOP Publishing Ltd
SN 1742-6588
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/18737
UL https://hdl.handle.net/20.500.14352/18737
LA eng
NO International Spring Seminar on Nuclear Physics - Current Problems and Prospects for Nuclear Structure (12th. 2017. Italy)
DS Docta Complutense
RD 8 abr 2025