Mo X, fa'avevela ma le mata'ituina o le puipuiga fa'avevelaina;talafeagai mo le malosiaga faaniukilia, faʻavavevave, faʻaoga isotope, fale gaosi oloa X, suʻega e le faʻaleagaina, leitio (iodine, technetium, strontium), togafitiga punaʻai, faʻavevelaina, fale suʻesuʻe leitio, punaoa faʻafouina, nofoaga faaniukilia, mataʻituina le siosiomaga, faʻatonuga faʻailo taimi e faʻamautinoa ai. le saogalemu o le aufaigaluega.