ion55Parent Nuclides. Direct parent isotope is: 55 Co. Formation. 55 Fe can be artificially produced by neutron irradiation of stable iron isotopes: 54 Fe(n,γ) 55 Fe or 56 Fe(n,2n) 55 Fe. Accordingly, iron-containing components such as steelThe Place Located at the top of Ion Orchard on level 55, Fire restaurant at 1-Atico only opened last month and takes over the space of the now-defunct Salt Grill & Sky e