Электронный каталог

Статья

Nesterenko, V.O.
Low-Energy Spectral of Nobelium Isotopes : Skyrme Random-Phase-Approximation Analysis / V.O.Nesterenko, M.A.Mardyban, R.V.Jolos, A.A.Dzhioev, [a.o.]. – Text : electronic // Physical Review C. – 2025. – Vol. 111, No. 6. – P. 064322. – URL: https://doi.org/10.1103/54k6-dvnr.

Low-energy spectra in the isotopic chain 250−262 No are systematically investigated within the fully self-consistent Quasiparticle Random-Phase-Approximation (QRPA) using Skyrme forces SLy4, SLy6, SkM*, and SVbas. QRPA states of multipolarity 𝜆⁢𝜇=20, 22, 30, 31, 32, 33, 43, 44, and 98 are considered. The main attention is paid to isotopes 252 No and 254 No where the most extensive experimental spectroscopic information is available. In these two nuclei, a reasonable description of 𝐾𝜋=8−,2−, and 3+ isomers is obtained with forces SLy4 and SLy6. The disputed 8− isomer in 254 No is assigned as neutron two-quasiparticle configuration 𝑛⁡𝑛⁡[734↑,613↑]. The isomers are additionally analyzed using Skyrme functionals UNEDF1, UNEDF2, and UNEDF1SO. At the energies 1.2–1.4 MeV, the 2qp 𝐾 isomers 4−,7− in 252 No and 4−,6−,7− in 254 No are also predicted. In 254 No , the 𝐾𝜋=3+ isomer should be accompanied by the nearby 𝐾𝜋=4+ counterpart. It is shown that, in the chain 250−262 No , some features of 252 No and 254 No should exhibit essential irregularities caused by a noticeable shell gap in the neutron single-particle spectrum and corresponding reduction of the neutron pairing. In particular, low-energy pairing vibrational 𝐾𝜋=0+ states in 252,254 No are predicted.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 341 а - Различные модели ядер$