Time variation of abnormal PIXE yields from some insulating binary metal fluorides under proton bombardment

Abstract Time-resolved multiscaler measurements were used to observe periodic increases in X-ray yields as a result of the discharge of the built-up charge in insulating targets of FeF 3 , CoF 2 CuF 2 · 2H 2 O and ZnF 2 bombarded with 1 nA of 1.5 Me V protons.