https://doi.org/10.1140/epja/i2011-11090-7
Regular Article - Theoretical Physics
Odd-odd nuclei as the core-particle-hole systems and chirality
1
Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681, Warsaw, Poland
2
Institute of Physics, Maria Curie-Skłodowska University, Pl. M. Curie-Skłodowskiej 1, 20-031, Lublin, Poland
3
Department of Chemistry, Simon Fraser University, 8888 University Drive, V5A1S6, Burnaby, Canada
4
Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681, Warsaw, Poland
Received:
29
January
2011
Revised:
6
June
2011
Accepted:
8
July
2011
Published online:
4
August
2011
Odd-odd nuclei treated as core-particle-hole systems with various collective cores and various particle-hole configurations are investigated within the Core-Particle-Hole Coupling (CPHC) model. A new symmetry, called the S-symmetry, is identified as a combination of the α-parity of the collective core and the proton-neutron symmetry of the valence proton and neutron in particle-hole configurations involving single-particle states with the same quantum numbers. It is found that the S-symmetric odd-odd nuclei show signatures which are usually considered as fingerprints of nuclear chirality, namely doublet band structure with a particular pattern of electromagnetic transitions. Reported results imply that the rigid rotor with a symmetric valence proton-neutron configuration is only a special case of the system with the novel S-symmetry. Therefore, it is an open question whether the chiral fingerprints discussed so far identify uniquely the orthogonal coupling of angular momentum in the intrinsic system.
© SIF, Springer-Verlag Berlin Heidelberg, 2011
