This paper reports on an investigation on the level structure of the odd-mass ${}^{29}\mathrm{Al}$ nucleus populated via heavy-ion induced fusion evaporation reaction. Rotational sequences with fast magnetic dipole transitions have been identified. These sequences exhibit the essential characteristic features of magnetic-rotation-like behavior, which has been corroborated through lifetime measurements using the Doppler shift attenuation method. The sequences also show features exhibited by axially deformed nuclei. Thus, the level structure presents the possibility of existence of multifaceted excitation modes in ${}^{29}\mathrm{Al}$, which are believed to be the first of its kind observed in the $A\approx$ 30 region. Shell model calculations, carried out within the $sd$-model space, qualitatively reproduce the experimental observations.

• Received 1 May 2018
• Revised 21 June 2018

DOI:https://doi.org/10.1103/PhysRevC.98.014330