The current state-of-the-art performances claimed for nuclear microbeam spatial resolutions are: (a) 400 nm spot sizes for high current (100 pA) proton beams, (b) 400 nm for high current alpha particle beams, (c) 100 nm for low proton current (co.1 PA) applications such as Scanning Transmission Ion Microscopy (STIM) and Ion Beam Induced Charge (IBIC) and (d) 50 nm for low current alpha particle...
