Eur. Phys. J. A (2004) 22: 179-188
https://doi.org/10.1140/epja/i2004-10041-9

Description of ¹¹¹Ru within the Core-Quasiparticle Coupling model

¹ Faculty of Physics, Warsaw University, ul. Hoża 69, PL-00-681, Warsaw, Poland
² Institute of Physics, Maria Curie-Skłodowska University, Pl. M. Curie-Skłodowskiej 1, PL-20-031, Lublin, Poland

Received: 1 April 2004
Accepted: 21 June 2004
Published online: 9 November 2004

Abstract

An even-odd isotope of ruthenium, ¹¹¹Ru, is investigated in the framework of the Core-Quasiparticle Coupling model. The energy levels and wave functions of low-lying states are calculated. The only one parameter adjusted to obtain the results in agreement with experimental data is the strength of the core-particle quadrupole-quadrupole interaction. The neighbouring even-even cores, ¹¹⁰Ru and ¹¹²Ru, are described by means of the collective “quadrupole plus pairing” model with the Bohr Hamiltonian determined fully from a microscopic theory without any adjustable parameter. Results for ¹¹¹Ru are compared with a new set of experimental data obtained recently. An importance of the pairing interaction is confirmed. A remarkable agreement of theoretical results and experimental data is obtained for all eight positive- and negative-parity bands delivered by the newest experiment.