First Penning trap mass measurement of $^{36}$Ca*

Isospin symmetry is an approximate symmetry between hadrons and can be useful in the description of atomic nuclei, especially in the prediction of atomic mass with the isobaric multiplet mass equation (IMME). Isobaric quintets provide the best test of the IMME and can identify higher order corrections suggestive of isospin symmetry breaking effects in the nuclear Hamiltonian. Only two quintets have all five members’ ground state masses measured to high-precision by Penning trap mass spectrometry. We present the first Penning trap measurement of neutron-deficient $^{36}$Ca, marking the completion of the $A = 36$ quintet. A beam of $^{36}$Ca was produced by projectile fragmentation at the National Superconducting Cyclotron Laboratory. The beam was stopped and the mass of atomic $^{36}$Ca$^+$ and $^{36}$Ca$^{2+}$ measured by the Time of Flight - Ion Cyclotron Resonance method in the LEBIT Penning trap. The measurement is considered with evaluated nuclear data to update the IMME and search for isospin symmetry breaking effects for $A = 36$.