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 steelSingaporeans love our retail therapy, which makes Orchard Road a hotspot for weekend hangouts. We’re more than familiar with ION Orchard, which has everything from