Correlation between nuclear shape and ISGMR properties in even-even <mml:msup>90-108</mml:msup>Zr isotopes: a QFAM analysis
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, cilt.53, sa.7, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 53 Sayı: 7
- Basım Tarihi: 2026
- Doi Numarası: 10.1088/1361-6471/ae8462
- Dergi Adı: JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
The ground-state deformations of even-even 90-108Zr nuclei were calculated using covariant energy density functionals with two different types of interactions: meson-exchange and point-coupling. The shape evolution of the considered nuclei, sudden onset of large deformations, and phenomena of shape coexistence were systematically analyzed. Furthermore, the isoscalar giant monopole resonance (ISGMR) has been built on both the ground state and the second shape configurations using the quasiparticle finite amplitude method . The response of the zirconium nuclei to isoscalar monopole excitation, depending on their shapes, has been discussed in detail. It has been found that the ISGMR strength function is strongly governed by nuclear deformation. Our calculation indicates that the ISGMR is significantly affected by both types of axial deformation and evolves into a fragmented structure. These measurable effects are presented in terms of the energies and strengths of the peaks arising in the giant monopole resonance (GMR). In the case of larger deformation, the ISGMR is found to exhibit a dual structure. To investigate the origin of the dual structure of the ISGMR, the strength of the K = 0 branch of the ISGQR has also been calculated, and its connection with the ISGMR has been discussed. In addition to deformation, the effect of neutron excess on the GMR has also been examined, and it has been found to contribute to the low-energy region and considerably enhance its strength.