Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms vol:64 issue:1-4 pages:256-260
An emission channelling study has been performed on alpha-emitting Fr implants in Fe. The implantation dose was kept below 10(11) atoms/cm2 to assure single cascade conditions. Low dose was possible as the experiment was done on line, and data was recorded with a position sensitive detector. The study revealed 45% of francium in substitutional sites at room temperature and 57% in substitutional sites at 120 K. No evidence for vacancy trapping was found, suggesting a small trapping radius for Fr in Fe.