The structure of the new nuclides discovered recently in the ${}^{241}\mathrm{Am}{(}^{22}\mathrm{Ne},4n)$ reaction, ${}^{259}\mathrm{Db},$ and its $\alpha$-decay chain are systematically studied in the relativistic mean field (RMF) approach with NL3 and TM1 effective interactions. Both the pairing correlation and deformation are essential to reproduce the experiment $Q_{\alpha }$ values. Large deformations have been predicted for all nuclei in the $\alpha$-decay chain, i.e., $\beta \sim 0.28–\mathrm{0.30.}$ The single-particle levels for both protons and neutrons from the deformed RMF theory are discussed in detail.

• Received 24 July 2001

DOI:https://doi.org/10.1103/PhysRevC.65.047306