Explanatory notes
… in nature in the monoisotopic state, e.g., beryllium 9, fluorine 19, aluminium 27, phosphorus 31, manganese 55, … chemical effects such as : (1) Ionisation of gases. (2) Fluorescence. (3) Fogging of photographic plates. These … counters, ionisation chambers, Wilson chambers, bubble flow counters, scintillation counters, and sensitised films …