Shape coexistence in Sr isotopes
نویسندگان
چکیده
Background: Sr isotopes are located in the mass region $A\ensuremath{\approx}100$, where a very quick onset of nuclear deformation exists; other notable examples this area Yb, Zr, and Nb nuclei. The presence proton subshell closure $Z=40$ allows existence particle-hole excitations that produce low-lying intruder bands.Purpose: goal work is study structure even-even $^{92\text{--}102}\mathrm{Sr}$ through accurate description excitation energies, $B(E2)$ transition rates, radii, two-neutron separation energies.Method: interacting boson model with configuration mixing will be framework to calculate all observables isotopes. Only two types configurations considered, namely, 0-particle--0-hole 2-particle--2-hole excitations. parameters determined using least-squares procedure for energies rates.Results: For whole chain isotopes, value $B(E2)$'s, isotope shifts have been obtained, good agreement between theory experiment. Also, detailed analysis wave functions performed and, finally, mean-field energy surfaces deformation, $\ensuremath{\beta}$, obtained.Conclusions: states has confirmed its connection clarified. lightest present spherical while heaviest ones clearly deformed. rapid at neutron number 60 due crossing regular moreover, both families an increase number.
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2022
ISSN: ['2470-0002', '2469-9985', '2469-9993']
DOI: https://doi.org/10.1103/physrevc.105.034341