Qhov ntau dua uranium-238 tsis raug fission thiab yog li tsis tuaj yeem siv los ua roj rau nuclear reactors. Txawm li cas los xij, yog tias uranium-238 tau tawg nrog cov neutrons (piv txwv li uranium-235), nws nqus cov neutronthiab hloov mus ua uranium-239.
Yuav ua li cas thaum uranium-235 raug foob nrog lub neutron?
Thaum ib lub neutron dawb tsoo lub nucleus ntawm fissile atom zoo li uranium-235 (235 U), cov uranium tawg ua ob lub me me hu ua fission fragments, ntxiv rau ntau neutrons. Fission tuaj yeem ua rau nws tus kheej txhawb nqa vim tias nws tsim cov neutrons ntau dua nrog qhov ceev uas yuav tsum tau ua kom cov fissions tshiab.
Thaum uranium-238 U 238 yog bombarded nrog ib tug alpha particle Cov khoom yog ib tug tshiab lub ntsiab ntxiv rau ib tug neutron Dab tsi yog lub ntsiab tshiab?
Uranium-238 tsim thorium-234 los ntawm alpha lwj. Ib qho α-particle yog helium nucleus.
Thaum twg uranium isotope tawg nrog lub neutron?
Cov tshuaj tiv thaiv fission tuaj yeem sau ua: \[U_{92}^{235} + n_0^1 \to Ba_{56}^{141} + Kr_{36}^{92} + 3x + Q (zog)] Qhov twg peb cov khoom hu ua $x$ raug tsim tawm thiab lub zog Q raug tso tawm.
Yuav ua li cas uranium bombarded nrog neutrons?
Thaum lub sijhawm fission, uranium-235 atom absorbs a bombarding neutron, ua rau nws cov nucleus sib cais ua ob lub atom ntawm sib zog loj. … Cov neutrons uas tau tso tawm tshiab mus rau foob pob lwm yam uraniumatoms, thiab cov txheej txheem rov ua nws tus kheej thiab dhau mus. Qhov no yog hu ua chain reaction.
