2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
U- 238 muaj ib qho loj, thiab khib nuclei ntau dua fissile Fissile Fissionable
A nuclide muaj peev xwm ua kom tsis muaj fission (txawm tias tsis tshua muaj tshwm sim) tom qab ntes cov neutron ntawm siab lossis qis zog yog hu ua "fissionable". Lub fissionable nuclide uas tuaj yeem cuam tshuam rau fission nrog qis-zog thermal neutrons nrog qhov ua tau zoo yog hu ua "fissile". https://en.wikipedia.org › wiki › Fissile_material
Cov khoom siv tsis sib haum - Wikipedia
vim qhov ntxiv neutron ntxiv lub zog - ntau dua li qhov yuav tsum tau ua rau fission qhov tshwm sim nucleus. vim ntau lub zog xav tau, U- 238 ib txwm yuav tsis raug fission hauv nuclear reactor.
Vim li cas U 238 ruaj khov dua U 235?
gg-nuclides zoo li 238U tsis tso lub zog txaus thaum ntes cov neutron. Yog li no neutrons yuav tsum nqa ntau lub zog kinetic kom zoo siab rau lub nucleus saum lub fission barrier. … U-238 muaj 4 ntau neutrons tshaj U-234 thiab peb ntau neutrons tshaj U-235. U-238 yog qhov ruaj khov yog li muaj ntau dua ib txwm muaj.
Puas yog U 235 lossis U 238 muaj xov tooj cua ntau dua?
Feem ntau, uranium-235 thiab uranium-234 ua rau muaj kev phom sij ntau dua kev noj qab haus huv dua li uranium-238 vim tias lawv muaj lub neej luv dua ib nrab, lwj sai dua, thiab yog li "ntau cov xov tooj cua." Vim tias tag nrho cov uranium isotopes feem ntau yog alpha emitters, lawv tsuas yog muaj kev phom sij yog tias noj lossis nqus tau.
Koj puas tuaj yeem tau txais kev sib cais?
Uranium-238 thiab thorium-232 (thiab qee cov khoom siv fissionable) tsis tuaj yeem tswj hwm qhov tawg tawg ntawm tus kheej, tab sis cov isotopes tuaj yeem ua rau fission los ntawm kev tswj xyuas sab nraud muab cov neutrons ceev ceev los ntawm fission lossis fusion cov tshuaj tiv thaiv.
U 238 puas tshwm sim?
Natural uranium yog tsim los ntawm peb lub isotopes loj, uranium-238 (99.2739–99.2752% natural abundance), uranium-235 (0.7198–0.7202%), thiab uranium- 234 (0.0050–0.0059%).
Pom zoo:
Puas pom qhov tseem ceeb yog vim li cas lossis vim li cas ho tsis?
Kev sib txuas lus pom kev pab cov neeg tuaj saib nkag siab cov ntaub ntawv. Nws ua rau kom nkag siab txog cov ntsiab lus. Hom duab ob sab uas pab kev sib txuas lus muaj xws li kos duab, kos duab kos duab, animation, kos npe, typography, graphic designs, thiab lwm yam.
Puas yog qhov sharecropping system zoo vim li cas lossis vim li cas ho tsis?
-Sharecropping raws li keeb kwm kev coj ua nyob rau hauv American Soutic yog ntawm cov tswv yim qhev, txawm tias tsawg dua li niaj hnub ua liaj ua teb. Vim li cas thiaj tau sharecropping tsis ua haujlwm? Sharecropping khaws cia dub neeg txom nyem thiab nyob rau hauv ib txoj hauj lwm uas lawv tau zoo nkauj npaum li cas lawv tau hais los ntawm tus tswv av lawv ua haujlwm.
Vim li cas koj yuav tsum muab nqi zog rau koj tus kheej rau koj qhov kev ua tiav?
Vim li cas? Los ntawm kev muab nqi zog rau koj tus kheej tam sim no,koj lub paj hlwb ua rau muaj kev xav zoo, ua rau pom tias koj qhov kev siv zog ua rau muaj txiaj ntsig zoo. Los ntawm kev ua qhov no tsis tu ncua, koj lub hlwb yuav pib txuas kev txaus siab kom ua tiav txoj haujlwm lossis lub hom phiaj thiab txav mus rau yav tom ntej.
Vim li cas koj tsis tuaj yeem hle koj tus kheej?
Cov lus teb yog nyob tom qab ntawm lub hlwb hauv thaj chaw hu ua cerebellum, uas koom nrog hauv kev saib xyuas kev txav. … Thaum koj sim tickle koj tus kheej, lub cerebellum kwv yees qhov kev xavthiab qhov kev kwv yees no yog siv los tshem tawm cov lus teb ntawm lwm qhov chaw hauv hlwb rau tickle.
Vim li cas koj thiaj tsis muaj tus lej tsis zoo?
Qhov no tsis yog qhov tseeb tias cov lej tsis zoo muab cov lej tsis zoo. Qhov zoo lossis qhov tsis zoo nyob ntawm lub hauv paus ntawm tus lej. Cov lej tsis zoo muab qhov tshwm sim tsis zoo tshwm sim thaum lawv cov exponent yog khib thiab lawv muab qhov txiaj ntsig zoo thaum tus lej suav.
