Chaos and isospin symmetry breaking in rotational nuclei

Sheikh, JA Kruppa, AT Rowley, N

Ja. Sheikh et al., Chaos and isospin symmetry breaking in rotational nuclei, NUCL PHYS A, 694(1-2), 2001, pp. 233-248

21

INGLESE

Article

Physics

NUCLEAR PHYSICS A

0375-9474 → ACNP

694

1-2

2001

233 - 248

ISI

0375-9474(20011105)694:1-2<233:CAISBI>2.0.ZU;2-I

For nuclei with N approximate to Z, the isospin degree of freedom is import ant and, for deformed systems, rotational bands of different isospin may be expected at low excitation energies. We have investigated, in a simple mod el space, the influence of the isospin-breaking Coulomb interaction on the degree of chaoticity of these rotational bands. The statistical measures us ed rely on an analysis of level-spacing distributions, which are extremely difficult to measure experimentally. We show, however, that the overlap int egrals between states of similar frequency reflect well the degree of chaot icity. This quantity is closely related to the experimentally more accessib le gamma -decay "spreading width". (C) 2001 Elsevier Science B.V. All right s reserved.