Rotational Bands in ²⁴⁹Md

An in-beam γ-ray spectroscopy experiment on the heavy odd-Z nucleus ²⁴⁹Md was performed at the ATLAS accelerator facility of Argonne National Laboratory using the ²⁰³Tl(⁴⁸Ca, 2n) fusion evaporation reaction. The Argonne Gas-Filled Analyzer (AGFA) was used to separate recoils of interest, while Gammasphere detected prompt γ-rays emitted from excited states. Recoil- and recoil-decay tagging techniques were utilised to identify new rotational bands in ²⁴⁹Md based on one-proton quasiparticle states. One observed set of states forms a pair of strongly coupled bands with relatively strong E2 transitions, and another sequence of γ-ray transitions is indicative of a decoupled band of E2 transitions. These bands are respectively assigned as based on the Nilsson level configurations 7/2⁻[514] and 1/2⁻[521], corresponding to the ground and first excited state of ²⁴⁹Md. The presence of at least one high-K multi-quasiparticle isomer was also confirmed. This talk presents the results of the experiment, and a comparison with available theoretical predictions.