Электронный каталог

Статья

Cheng, Y.Y.
Octupole Collectivity in Low-Lying States of N=126 Isotones with Partilce-Hole Excited Nucleon-Pair Approximation and Realistic Effective Interaction / Y.Y.Cheng, R.V.Jolos, N.V.Antonenko. – Text : electronic // Physical Review C. – 2025. – Vol. 112, No. 5. – P. 054308. – URL: https://doi.org/10.1103/rb3c-ksw5.

In this work we consider neutron particle-hole excitations across the 𝑁=126 shell gap and perform calculations for the 𝑁=126 isotones, *2*1*0Po ,*2*1*2Rn,*2*1*4Ra, and *2*1*6Th , using the nucleon-pair approximation of the shell model with particle-hole excitations. The Hamiltonian is constructed starting from the realistic low-momentum interaction, to which simple and important modifications are further made. The calculated energy levels, magnetic moments, and 𝐵⁡(𝐸⁢2)'s are in a good agreement with available experimental data, for both the low-lying states characterized by the neutron 𝑁=126 closed-core state and those by neutron particle-hole excitations, and on this basis, the 3*-&sub(1) states manifest themselves with a nature of the strong mixing between the two types of configurations. The available experimental datum of 𝐵⁡(𝐸⁢3;3*−&sub(1)→0*+&sub(g.s.)) is reproduced, and the neutron particle-hole excitations are found to play a decisive role here. In addition, the experimental data for the 8*+ 1 states, in particular the 𝐵⁡(𝐸⁢3;11*−&sub(1)→8*+&sub(1))'s, are well reproduced and interpreted.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 341 а - Различные модели ядер$
Бюллетени = 51/025