Search for "helium ion implantation" in Full Text gives 2 result(s) in Beilstein Journal of Nanotechnology.
Beilstein J. Nanotechnol. 2021, 12, 633–664, doi:10.3762/bjnano.12.52
Beilstein J. Nanotechnol. 2012, 3, 579–585, doi:10.3762/bjnano.3.67