We have performed a systematic study of the spectroscopic properties of the isotopic chain ${}^{214-226}\mathrm{Rn}$ using the $spdf$-IBM-2 interacting boson model. This model includes octupole degrees of freedom, what allows the description of negative- and positive-parity states with the same Hamiltonian. We discuss how this model is able to describe the transition from vibrational to rotational spectra in these nuclei with a rather small set of parameters, which were obtained to reproduce the properties of ${}^{214-222}\mathrm{Rn}$. Then the calculations regarding ${}^{224,226}\mathrm{Rn}$ can be considered a prediction, which compares very well with recent experimental data.

• Received 23 November 2020
• Revised 3 May 2021
• Accepted 1 June 2021

DOI:https://doi.org/10.1103/PhysRevC.104.014308