Conference
Study of 0+ and 8− states in even-even 250−260No isotopes.
| Τίτλος: | Study of 0+ and 8− states in even-even 250−260No isotopes. |
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| Συγγραφείς: | Mardyban, M.A.1,2 (AUTHOR) mmardyban@theor.jinr.ru, Nesterenko, V.O.1,2 (AUTHOR) |
| Πηγή: | EPJ Web of Conferences. 8/1/2026, Vol. 378, p1-4. 4p. |
| Θεματικοί όροι: | *Pairing correlations (Nuclear physics), *Metastable states, *Nuclear models, *Isotopes, *Nuclear excitation, *Strong interactions (Nuclear physics), *Nuclear structure |
| Περίληψη: | Low-lying Kπ = 0+ and isomeric 8− states in even-even isotopes 250−260No are explored within the Quasiparticle Random-Phase Approximation (QRPA) method with Skyrme parametrization SLy4. The deformations, single-particle (s-p) spectra and pairing in the isotopes are inspected. The calculations predict a pronounced minimum in the neutron pairing at A=252, 254, which significantly affects the properties of 0+ and 8− states and leads to a correlation of their spectra. It is shown that 8− isomers are basically low-energy two-quasiparticle (2qp) states. The appearance or absence of these isomers in 250−260No is explained as a combined effect of the s-p spectra and pairing. The collective 0+ states are predicted in all the isotopes as the lowest multipole non-rotational excitations. These states are interpreted as a superposition of pairing vibrations and β-vibrations. The results are in a reasonable agreement with available experimental data for 252,254No. [ABSTRACT FROM AUTHOR] |
| Βάση Δεδομένων: | Academic Search Index |
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