Starting with British physicist Ernest Rutherford's discovery in 1919 of a reaction between a nitrogen nucleus and an alpha particle, all research in nuclear physics until 1932 was performed with alpha particles from released by the decay of naturally radioactive elements.
Kusukela kuvulwa physics British Ernest 'uRutherford ngo-1919, ukusabela nucleus nitrogen ne-kuyizinhlayiyana-alpha, zonke ucwaningo emkhakheni wesayensi yenuzi kuya ku-1932 Kwakuseshwa nge-helium nuclei, ezikhishwe ukubola zemvelo enemisebe.