Video: Yuav ua li cas ua rau nuclear fission chain reactions ua tau?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A muaj peev xwm nuclear fission saw cov tshuaj tiv thaiv . A uranium -235 atom absorbs ib neutron, thiab fissions ua ob ( fission fragments), tso tawm peb lub neutrons tshiab thiab ib tug loj npaum li cas ntawm binding zog. 2. Ib tug ntawm cov neutrons yog absorbed los ntawm ib tug atom ntawm uranium -238, thiab tsis txuas ntxiv tshuaj tiv thaiv.
Tsuas yog li ntawd, ua li cas nuclear fission ua rau cov kev cuam tshuam saw?
Nuclear fission yog qhov tawg ntawm lub atomic nucleus loj rau hauv me me nuclei. Ntxiv nrog rau cov khoom 'tus ntxhais', ob lossis peb lub neutrons kuj tawg tawm ntawm cov tshuaj tiv thaiv fission thiab cov no ua tau sib tsoo nrog lwm cov uranium nuclei rau ua rau ntxiv fission cov tshuaj tiv thaiv . Qhov no yog lub npe hu ua a chain reaction.
Ib sab saum toj, vim li cas cov saw hlau tsis tshwm sim hauv lub tshuab hluav taws xob nuclear? A nuclear tawg ua tsis tau tshwm sim vim roj tsis yog compact txaus tso cai rau ib qho kev tswj tsis tau chain reaction . Lub MIT reactor muaj ntau cov dej thiab cov ntaub ntawv tseem ceeb uas ua rau cov neutrons qeeb ua ntej lawv mus txog lwm cov fissile atoms.
Ib yam li ntawd, tib neeg nug, dab tsi ua rau muaj kev sib txuas lus?
Nyob rau hauv chemistry thiab physics, ib tug self-sustaining series ntawm cov tshuaj tiv thaiv . Hauv ib chain reaction Nyob rau hauv ib lub uranium-based nuclear reactor, piv txwv li, ib qho neutron ua rau lub nucleus ntawm ib tug uranium atom mus undergo fission. Nyob rau hauv tus txheej txheem, ob los yog peb ntxiv neutrons raug tso tawm.
Yuav ua li cas koj nres ib fission chain reaction?
Tib txoj kev los tswj lossis nres a nuclear chain reaction yog to nres cov neutrons los ntawm splitting ntau atoms. Tswj cov pas nrig ua los ntawm cov khoom siv neutron-absorbing xws li boron txo tus naj npawb ntawm cov neutrons dawb thiab coj lawv tawm ntawm tshuaj tiv thaiv.
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