Электронный каталог

Статья

He, X.-T.
*a Decay of the Neutron-Deficient Nucleus 224Np by the Particle-Number-Conserving Method in the Framework of the Deformed Shell Model / X.-T.He, T.M.Shneidman, N.V.Antonenko, [a.o.]. – Text : electronic // Physical Review C. – 2025. – Vol. 111, No. 6. – P. 064312. – URL: https://doi.org/10.1103/g5cs-7tvg.

The particle-number-conserving (PNC) method in the framework of the deformed shell model is employed to study the properties of the newly discovered short-lived neutron-deficient nucleus 224 Np and its 𝛼 decay. The calculated energy of the 𝛼 particle lies within 300 keV of the experimental data. This is the first application of the PNC method to the region of neutron-deficient nuclei. This work provides the first attempt to combine the microscopic PNC theory with empirical formulas to study the nuclear 𝛼 decay. The configurations of ground states are assigned as 𝜋⁢5/2−⁢[523]⊗𝜈⁢5/2+⁢[633] for 224 Np , 𝜋⁢1/2−⁢[530]⊗𝜈⁢3/2+⁢[642] for 220 Pa , 𝜋⁢3/2+⁢[651]⊗𝜈⁢1/2−⁢[501] for 216 Ac , and 𝜋⁢7/2−⁢[514]⊗𝜈⁢3/2−⁢[501] for 212 Fr . The proton subshell at 𝑍=92 disappeared in 224 Np . Low-lying excited states are predicted for nuclei along the 𝛼-decay chain by the PNC method. Based on the PNC predicted 𝛼-decay energy and the assigned configurations, the 𝛼-decay half-lives are calculated by the empirical formulas, in which the angular momentum taken away by the 𝛼 particle is taken into account. The angular momentum has an important effect on the 𝛼-decay half-life. The errors of the empirical formula calculation are of two orders of magnitude with the experimental data.



ОИЯИ = ОИЯИ (JINR)2025