Video: Vim li cas boron yog ib qho zoo neutron absorber?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum twg neutrons Sib tsoo nrog cov nucleus ntawm atoms xws li uranium, lawv ua rau uranium atom fission (sib cais ua ob lwm, me atoms) thiab tsim lub zog. Vim nws tuaj yeem nqus tau neutrons , boron siv tau los nres qhov kev tshwm sim ntawd. Qhov no yog isotope zoo ntawm absorbing neutrons.
Ib yam li ntawd, puas boron nqus hluav taws xob?
Cov kws tshawb fawb siv cov neutron siab nqus hla ntu ntawm lub ntsiab lus hu ua boron -10 rau ua hluav taws xob kev kho mob rau cov neeg mob uas lawv cov qog nqaij hlav cancer tau kis hauv lub cev lossis cov qog nqaij hlav hauv qhov chaw ua haujlwm tsis tau. Boron -10 yog muab rau cov qog nqaij hlav cancer thiab tom qab ntawd lub cev tau tawg nrog cov neutrons qeeb.
Ib yam li ntawd, boron neutron capture therapy ua haujlwm li cas? Ib yam khoom uas muaj boron yog txhaj rau hauv cov hlab ntsha. Cov boron sau nyob rau hauv cov qog hlwb. Tus neeg mob ces tau txais hluav taws xob kev kho mob nrog atomic hais hu ua neutrons . Cov neutrons react nrog cov boron kom tua cov qog hlwb tsis ua mob rau lub cev.
Tsuas yog li ntawd, yog vim li cas boron siv nyob rau hauv nuclear reactors?
Feem ntau reactors yuav tsum tau refueled vim lawv tsis tuaj yeem tsim cov neutrons txaus los txhawb nqa fission . Boron yog siv kom nqus tau cov neutrons ntxiv uas tsim los khaws cov reactor tsim tau ntau npaum li neutrons raws li nws noj (criticality). Thorium kuj pab txo qis Boron / Gadolinium cov cai.
Yuav ua li cas tswj rods nqus neutrons?
Tswj Rods . Cov tshuaj tiv thaiv kab mob nuclear tuaj yeem tswj tau siv lub cuab yeej hu ua a tswj rod . Tswj rods yog ua los ntawm cov ntaub ntawv uas nqus neutrons . Yog li ntawd, thaum a tswj rod yog muab tso rau hauv lub reactor nuclear nws txo tus naj npawb ntawm dawb neutrons muaj los ua rau uranium atoms rau fission.
Pom zoo:
Puas yog dej yog neutron absorber?
Nws yog cais los ntawm cov roj rods uas ua tau kom muaj cua sov. Hnyav dej muaj txiaj ntsig zoo ntawm kev ua kom qeeb (moderating) neutrons, muab CANDU reactors lawv qhov tseem ceeb thiab txhais cov yam ntxwv ntawm siab 'neutron kev lag luam'
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