xov tooj cua tawg
Radionuclides tseem hu ua nuclides tsis khov kho, uas tsis raug tawm tsam kom ruaj khov ntawm nuclides. Nws hais txog qhov tsis ruaj khov hluav taws xob atomic nucleus uas tuaj yeem tawm ntawm cov duab hluav taws xob (xws li alpha rays, beta rays, thiab lwm yam) thiab tsim cov nuclide ruaj khov los ntawm kev ua kom lwj. Lub zog tso tawm thaum lub cev lwj yog hu ua lwj lub zog, thiab lub sijhawm xav kom lwj mus rau ib nrab ntawm tus lej qub dhau los ua kev lwj ib nrab-lub neej, uas kwv yees dav los ntawm 1015 txog 10-12 vib nas this.