Ho Utloisisa Likarabelo tsa Nyutlelie le Mehlala
Likarabelo tsa nyutlelie ke e 'ngoe ea liketsahalo tsa bohlokoa ka ho fetisisa fisiks ea sejoale-joale hobane li kenyelletsa liphetoho tse etsahalang ka har'a nucleus ea athomo. Ho fapana le liketso tsa lik'hemik'hale, tse kenyeletsang motsamao kapa motsoako oa lielektrone ka har'a khetla ea athomo, liketso tsa nyutlelie li etsahala ka ho toba ka har'a nucleus ea athomo, e entsoeng ka liprothone le li-neutron. Ka lebaka leo, liketso tsa nyutlelie li ka hlahisa matla a mangata haholo, a maholo ho feta matla a liketso tsa lik'hemik'hale a bongata bo lekanang ba lintho. Ho utloisisa liketso tsa nyutlelie ho re thusa ho hlalosa mefuta e mengata ea liketsahalo tsa tlhaho, ho tloha matla a Letsatsi ho ea ho thehoeng ha likarolo bokahohleng, 'me hape ho theha motheo oa mahlale a kang limela tsa matla a nyutlelie le meriana ea nyutlelie.
Ho Utloisisa Likarabelo tsa Nyutlelie
Ka bokhutšoanyane, karabelo ea nyutlelie ke mokhoa oo ka oona nucleus ea athomo e fetohang ka lebaka la ho sebelisana le likaroloana tse ling kapa hobane nucleus ka boeona e fetoha e sa tsitsang. Liphetoho tsena li ka hlahisa nuclei e ncha, tsa ntša mahlaseli, 'me tsa lokolla kapa tsa monya matla. Likarabelong tsa nyutlelie, boitsebiso ba karolo e itseng bo ka fetoha hobane palo ea liprothone ka har'a nucleus (nomoro ea athomo) e ka eketseha kapa ea fokotseha. Sena se khetholla liketso tsa nyutlelie ho liketso tsa lik'hemik'hale, tseo ho tsona likarolo li lulang li tšoana 'me li theha metsoako e mecha feela.
Ka kakaretso dikarabelo tsa nyutlelie di bakwa ke:
1. Ho monngoa ha likaroloana (mohlala, li-neutron, liprothone, kapa likaroloana tsa alpha) ke nucleus ea athomo.
2. Ho bola ho sa tsitsang ha di-nuclei tse sa tsitsang (mahlaseli a kotsi).
3. Ho thulana ha di-nuclei ka matla a phahameng, jwalo ka dikarabelong tsa ho kopana dinaleding kapa di-accelerator tsa dikarolwana.
Likarabelong tsa nyutlelie, khopolo ea sekoli sa boima le eona ea tsebahala. Boima bo bong bo "lahleha" hobane bo fetoloa matla, ho latela equation ea Einstein:
E = mc²,
moo E e leng matla, m ke boima bo fetohang, mme c ke lebelo la lesedi. Hobane c e kgolo haholo, esita le phetoho e nyane boimang e ka hlahisa matla a mangata haholo.
Litšobotsi tsa Likarabelo tsa Nyutlelie
Tse ling tsa litšobotsi tsa mantlha tsa liketso tsa nyutlelie li kenyelletsa:
– Dielemente tse fetohang: palo ya diprothone e ka fetoha e le hore ho thehwe dielemente tse ntjha.
– Matla a maholo haholo: a fetang haholo diketso tsa dikhemikhale.
– Ha e itshetlehe ka maemo a kantle a kang mocheso le kgatello (le hoja mekgweng e itseng, mohlala, ho kopanya, mocheso o phahameng o a hlokahala ho qala tshebetso).
– E ka hlahisa mahlaseli: a kang mahlaseli a alpha, beta, gamma, kapa neutron.
– E kenyelletsa nucleus ea athomo: eseng lielektrone tsa valence.
Mefuta ea Likarabelo tsa Nyutlelie
Ka kakaretso, dikarabelo tsa nyutlelie di ka arolwa ka mefuta e mmalwa e meholo: ho bola ha mahlaseli a kotsi, ho arohana ha dikhetla le ho kopana ha dikhetla.
1. Ho Bola ha Mahlaseli a Lehlaseli
Ho bola ha mahlaseli a kotsi ke karabelo ea nyutlelie e etsahalang ka tšohanyetso moo nucleus e sa tsitsang ea athomo e lekang ho fihlela boemo bo tsitsitseng haholoanyane. Ho bola hona ho hlahisa mahlaseli 'me ho fetola nucleus hore e be nucleus e' ngoe.
Mefuta e atileng haholo ea ho bola:
– Ho bola ha Alpha (α): nucleus e ntša likaroloana tsa alpha (liprothone tse 2 + li-neutron tse 2), kahoo palo ea athomo e fokotseha ka 2 'me palo ea boima e fokotseha ka 4.
– Ho bola ha beta (β): phetoho e etsahala ha neutron e fetoha proton (beta minus) kapa proton e fetoha neutron (beta plus), hoo nomoro ea athomo e fetohang ka 1.
– Ho bola ha Gamma (γ): nucleus e ntša matla ka mokhoa oa mahlaseli a gamma ntle le ho fetola palo ea athomo kapa palo ea boima, empa e theola boemo ba matla ba nucleus.
2. Ho Aroha ha Nyutlelie
Ho arohana ke ho arohana ha nucleus e boima hore e be di-nuclei tse pedi tse bobebe, ka ho lokollwa ha matla mme hangata di-neutron tse mmalwa. Karabelo ya ho arohana e ka hlaha e le karabelo ya ketane haeba di-neutron tse hlahang di baka ho arohana ha di-nuclei tse ding.
Ho petsoha hangata ho etsahala linthong tse boima tse kang uranium-235 (U-235) le plutonium-239 (Pu-239). Ho petsoha ke motheo oa ts'ebetso ea li-reactor tsa nyutlelie le libomo tsa athomo.
3. Ho Kopanngoa ha Nyutlelie
Ho kopana ha di-nuclei tse pedi tse bobebe ho etsa nucleus e boima. Ho kopana ha di-nuclei ho hlahisa matla a mangata haholo mme ke mohlodi wa matla a mantlha bakeng sa dinaledi, ho kenyeletswa le Letsatsi. Leha ho le jwalo, ho kopana ho hloka maemo a feteletseng a kang mocheso o phahameng haholo le kgatello e le hore di-nuclei tse nang le matla a matle di ka hlola ho kgannwa ha tsona ka motlakase (matla a Coulomb) mme di atamele haufi ho lekana ho kopana.
Mehlala ea Likarabelo tsa Nyutlelie Bophelong le Theknolojing
Ho etsa hore ho be bonolo ho utloisisa, mona ke mehlala e meng ea 'nete ea likarabelo tsa nyutlelie tseo hangata li tšohloang masimong a lits'ebetso tsa mahlale le theknoloji.
1. Mohlala oa ho Bola ha Alpha: Uranium-238
Uranium-238 ke isotope e nang le mahlaseli a kotsi eo alpha e bola ho ba thorium-234.
Tekanyo e bonolo ea karabelo ke:
²³⁸U → ²³⁴Th + ⁴He
Mona, uranium (nomoro ea athomo ea 92) e fetoha thorium (nomoro ea athomo ea 90) 'me e ntša karoloana ea alpha (nucleus ea helium). Ho bola hona ho etsahala ka tlhaho 'me ke karolo ea ketane e telele ea ho bola ha mahlaseli a kotsi.
2. Mohlala oa ho Bola ha Beta: Carbon-14
Carbon-14 (C-14) e tsebahala mokgweng wa ho bala nako ya radiocarbon bakeng sa mesaletsa ya dintho tsa kgale. Isotope ena e bola ka beta-minus ho ya ho naetrojene-14.
Tekanyo ea karabelo:
¹⁴C → ¹⁴N + e⁻ + ν̄
Electron (e⁻) ke karoloana ea beta, 'me ν̄ ke antineutrino. Mokhoa ona o fetola neutron e le 'ngoe ka har'a nucleus hore e be proton, e eketsang palo ea athomo ho tloha ho 6 (khabone) ho ea ho 7 (naetrojene).
3. Mohlala oa ho Fihla: Uranium-235 ho Reactor ea Nyutlelie
Ka har'a reactor ea nyutlelie, nucleus ea uranium-235 e monya li-neutron tse liehang ebe e arohana ho ba li-nuclei tse peli tse bobebe, tse kang barium le krypton, ka ho lokolloa ha li-neutron le matla.
Mohlala oa karabelo:
²³⁵U + ¹n → ¹⁴¹Ba + ⁹²Kr + 3¹n + matla
Li-neutron tse hlahang li ka baka karohano ea li-nuclei tse ling tsa U-235, tsa baka karabelo ea ketane. Ka har'a reactor, karabelo ena e laoloa ke ba laolang (ba liehisang li-neutron) le lithupa tsa taolo (tse monyang li-neutron) ho netefatsa tlhahiso ea matla e tsitsitseng le e sireletsehileng. Matla a tsoang karohanong a sebelisetsoa ho futhumatsa metsi ho hlahisa mouoane le ho fetola li-turbine ho hlahisa motlakase.
4. Mohlala oa ho Kopanngoa: Likarabelo Letsatsing
Letsatsing, di-nuclei tsa haedrojene di kopana ho etsa helium ka letoto la di-reaction (ketane ya proton-proton). Ka bokhutšoanyane, di-nuclei tse nne tsa haedrojene di kopana ho etsa nucleus e le nngwe ya helium, e lokollang matla.
Sebopeho se bonolo:
4¹H → ⁴Eena + matla
Matla ana a hlahisoang ke ona a etsang hore Letsatsi le ntše khanya le mocheso, e leng se tšehetsang bophelo Lefatšeng. Ho kopanya ke karabelo e "hloekileng" haholo mabapi le mesi e ntšang khabone, empa theknoloji ea ho kopanya e laoloang Lefatšeng e ntse e le phephetso e kholo 'me e ntse e ntlafatsoa ka merero e fapaneng e kang tokamak.
5. Mehlala ea Likarabelo tsa Nyutlelie Lefapheng la Bongaka
Likarabelo tsa nyutlelie le tsona li sebelisoa meriana, mohlala, ka radioisotopes bakeng sa tlhahlobo le kalafo. Mohlala o mong o tsebahalang ke tšebeliso ea technetium-99m (Tc-99m) litšoantšong tsa bongaka (scintigraphy). Radioisotope ena e ntša mahlaseli a gamma a ka bonoang ke khamera ea gamma ho etsa 'mapa oa litho tsa' mele.
Kalafong ea kankere, ho sebelisoa li-isotope tse itseng tse ntšang likaroloana ho senya lisele tsa kankere, mohlala, Iodine-131 (I-131) bakeng sa kalafo ea mathata a qoqotho.
Tšusumetso le Matšoenyeho a Likarabelo tsa Nyutlelie
Ho sa tsotellehe melemo ea eona e mengata, liketso tsa nyutlelie le tsona li na le likotsi. Mahlaseli a ka lematsa lisele tse phelang haeba ho pepesehela mahlaseli a kotsi ho feta meeli e sireletsehileng. Ho feta moo, litšila tse nang le mahlaseli a kotsi tse tsoang ho li-reactor li hloka taolo e tiileng hobane li ka lula li le kotsi ka nako e telele. Ka hona, tšebeliso ea theknoloji ea nyutlelie e hloka maemo a phahameng a polokeho, tlhokomelo le thuto ho eketsa melemo le ho fokotsa likotsi.
Qetello
Likarabelo tsa nyutlelie ke lits'ebetso tse fetolang nuclei ea athomo, tse fetolang element e 'ngoe hore e be e 'ngoe 'me li hlahisa matla a mangata haholo. Likarabelo tsena li kenyelletsa ho bola ha mahlaseli a kotsi, ho arohana le ho kopana. Mehlala ea likarabelo tsa nyutlelie e ka fumanoa tlhahong, joalo ka ho bola ha uranium le ho kopana Letsatsing, hammoho le theknolojing ea sejoale-joale joalo ka li-reactor tsa nyutlelie le lits'ebeliso tsa bongaka. Ka tsamaiso e nepahetseng, likarabelo tsa nyutlelie li ka fana ka melemo e meholo bophelong, haholo-holo phepelong ea matla, lipatlisiso tsa saense le tlhokomelo ea bophelo.
Haeba o batla, nka boela ka etsa mofuta o bonolo wa sengoloa bakeng sa baithuti ba sekolo se phahameng/se phahameng, kapa ka eketsa ditshwantsho tsa dichate tsa karohano le fusion reaction ho etsa hore ho be bonolo ho di utlwisisa.
