Yrast structure of neutron-rich<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Ti</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>53</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>
Annotatsiya
\ensuremath{\gamma} rays from neutron-rich Ti nuclei in the vicinity of $N=32$ have been studied at Gammasphere using deep-inelastic reactions induced by $^{48}\mathrm{Ca}$ beams on thick $^{208}\mathrm{Pb}$ and $^{238}\mathrm{U}$ targets. The $^{53}\mathrm{Ti}$ yrast cascade was identified for the first time, and the location in energy of states with spin up to I = 21/2 was determined. The excitations of $^{53}\mathrm{Ti}$ provide new tests of effective interactions for full-pf-shell calculations. Comparisons between theory and experiment for the highest spin states in $^{53}\mathrm{Ti}$ favor the recently proposed GXPF1A interaction, which accounts for the appearance of a neutron subshell closure at $N=32$ in Ti isotopes as well as for the lack of a similar subshell closure at $N=34$, as predicted by earlier calculations with another interaction.