Taw qhia rau alpha hais
Alpha particles yog cov khoom tawm los ntawm cov khoom siv hluav taws xob thaum lawv lwj. Lawv tau tsim ntawm ob lub neutrons thiab ob tug protons (helium-4). Qhov loj yog plaub npaug ntawm hydrogen atoms. Lub nrawm tuaj yeem ncav cuag 20.000 mais hauv thib ob, nrog kev them nqi zoo. Cov. Lub hwjchim sib dhos tsis zoo, thiab tuaj yeem ua rau tus tsiaj' s tawv nqaij.
Alpha particles yog zoo tshaj tawm cov khoom siv hluav taws xob ntau zog (He-4 nuclei), uas poob sai zog tom qab dhau qhov nruab nrab. Lawv feem ntau yog tsim los ntawm cov hniav ntawm qee qhov atoms hnyav (piv txwv li uranium, radium) lossis qee cov khoom cuav. Alpha hais khiav hauv nruab nrab, nrawm nrawm zog, thiab tsis tuaj yeem nkag mus deb. Txawm li cas los xij, kev nkag mus rau hauv cov ntaub so ntswg (txawm tias nws tsis tuaj yeem nkag mus) yuav ua rau cov ntaub so ntswg puas. Alpha particles feem ntau yog ua tiav los ntawm daim tawv nqaij sab nraud ntawm tib neeg lub cev, thiab cov xov tooj cua tso tawm los ntawm alpha hais tsis ua rau muaj kev phom sij sab nraud ntawm tib neeg lub cev. Txawm li cas los xij, thaum lawv nqus lossis txhaj tshuaj, nws yuav muaj kev phom sij heev. Alpha particles tuaj yeem cuam tshuam los ntawm daim ntawv nyias nyias.