B. Abromeit

Area of research

Nuclear and High Energy Physics · Atomic and Molecular Physics, and Optics

Research interest

Research topics from publications: Structure of Cl38 and the quest for a comprehensive shell model interaction; High spin spectroscopy in Ra219: Search for the lower mass boundary of the region of statically octupole-deformed nuclei; Higher-spin structures inF21andNa25; Radiative decay of neutron-unbound intruder states inO19; βdecay ofSi38,40(Tz=+</m; High-spin states in Al29 and Mg27; High spin structure of Ar39 and the FSU cross-shell interaction; Complete spectroscopy of Po211 below 2.0 MeV via the (α, n) reaction; Multiparticle-hole excitations in nuclei near N = Z = 20: $$^{41}$$K; Onset of band structure in Ga70. Representative work: The higher-spin structure of $^{38}\mathrm{Cl}$ ($N=21$) was investigated following the $^{26}\mathrm{Mg}(^{14}\mathrm{C}$, $pn$) reaction at 30 and 37 MeV beam energies. The outgoing protons were detected in an $E\text{\ensuremath{-}}\mathrm{\ensuremath{\Delta}}E$ Si telescope placed at ${0}^{\ensuremath{\circ}}$ close to the target with a Ta beam stopper between the target and telescope. Multiple $\ensuremath{\gamma}$ rays were detected in time coincidence with the protons using an enhanced version of the FSU $\ensuremath{\gamma}$-detection array. The level scheme was extended up to 8420 keV with a likely spin of 10 $\ensuremath{\hbar}$. A new multishell interaction was developed guided by We report the results of a study of rotational bands in $^{219}\mathrm{Ra}$ via the $^{208}\mathrm{Pb}(^{14}\mathrm{C},3n)$ reaction to look for evidence that this nucleus is statically octupole deformed. We add 19 $\ensuremath{\gamma}$ rays not previously observed to the level scheme and extend the two most strongly populated alternating parity bands to $J=51/2$ and 45/2. The magnitude of the energy splitting between the spin-parity doublets in the two bands appears to exclude the possibility that $^{219}\mathrm{Ra}$ has a static octupole deformation