https://doi.org/10.1140/epjp/s13360-025-06641-1
Regular Article
Microscopic study of doublet bands in even–even 
Mo and 
Pd nuclei
1
Department of Physics, National Institute of Technology, 190 001, Srinagar, Jammu and Kashmir, India
2
Department of Physics, Govt. Degree College Shopian (Higher Education J&K), 192 303, Shopian, India
Received:
3
April
2025
Accepted:
10
July
2025
Published online:
2
August
2025
A comprehensive study of negative-parity doublet bands in even–even Mo and Pd nuclei has been performed using the microscopic triaxial projected shell model (TPSM) approach. The TPSM results for the doublet bands are revealing interesting insights into the role of neutron and proton excitations. Comparing the calculated energies obtained with neutron and proton excitations, it is found that the neutron excitation energies are slightly lower than their proton excitation counterparts. Moreover, the calculated aligned angular momentum 
clearly distinguishes between the two spectra, with the neutron values showing reasonable agreement with the empirically evaluated values from experimental data. In contrast, the proton values exhibit significant deviations. Furthermore, analysis of the transition probabilities, deduced from the TPSM wavefunctions along the negative-parity yrast and yrare bands, provides the characteristics transition probabilities expected for the doublet bands to originate from the chiral symmetry breaking. Moreover, the K-distributions and angular momentum projections along the three principal axes of the nuclear system of the wavefunctions for the doublet bands 
= 1 confirm that the negative-parity yrast and yrare bands in the studies nuclei are chiral in nature.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
