Ngā Āhuatanga o te Pūtake Atomika: Te Mārama ki te Ngākau o te Matū
Ko te karihi ngota te ngākau o ngā huānga katoa o te ao whānui. I roto i tētahi wāhi iti, he nui te kaha o roto, ā, ka taea hoki e ia te awe i ngā āhuatanga matū me ngā āhuatanga ā-tinana o ngā huānga kei roto. Ka tūhuratia e tēnei tuhinga ngā āhuatanga rerekē o te karihi ngota, tae atu ki ōna wāhanga taketake, ngā kaha e mahi ana, te pumau, ngā isotope, me te tūranga i roto i ngā tauhohenga karihi.
1. Ngā Wāhanga Taketake o te Pūnaha Atomika
E rua ngā momo matūriki iti-atomika o te karihi ngota: ko ngā porotana me ngā iutūniora, e mōhiotia ana ēnei ko ngā iutūniora. He utu pai tō ngā porotana, ā, kāore he utu o ngā iutūniora, e puritia ana ēnei e te kaha karihi kaha.
Pato
He matūriki iti-atomika te pūrotene, he utu pai o te \(+1 e\) me te papatipu tata ki te \(1.672 \times 10^{-27}\) kirokaramu. Ko te maha o ngā pūrotene i roto i te karihi o te ngota e whakatau ana i te tuakiri matū o tētahi huānga, e mōhiotia ana ko tōna tau ngota (Z). Hei tauira, kotahi te pūrotene o te hauwai, e ono ngā pūrotene o te waro, ā, e iwa tekau mā rua ngā pūrotene o te uranium.
Neutron
Ko te niutoro he matūriki kore utu (kore utu) he nui ake tōna taumaha i tō te porotona, tata ki te 1.675 kirokaramu. Ka rerekē pea te maha o ngā niutoro i roto i te karihi ngota ahakoa i waenga i ngā ngota o te huānga kotahi, ka hua ake he rerekētanga o ngā isotope o taua huānga.
2. Ngā Kaha i roto i te Pūtake Atomika
He maha ngā mana taketake e mahi ana i roto i te karihi ngota, ā, e whakatau ana i te kotahitanga me te pumau o ngā karihiona:
Te Kaha Karihi Kaha
Ko te kaha karihi kaha te kaha tino kaha o te ao whānui, ā, he tino whai hua tana mahi i ngā tawhiti tino poto, i runga i te raupapa o ngā \(1-3\) phentometers (\(1 \times 10^{-15}\) mita). Koia te kawenga mō te here i ngā protons me ngā neutrons i roto i te karihi, me te wikitoria i te pana hikohiko i waenga i ngā protons kua utua pai.
Te Kaha Auhikohiko
Ko te kaha hikohiko te kaha e mahi ana i waenga i ngā utu hiko. I roto i te horopaki o te karihi ngota, ka panaia e ngā porotana utu pai tetahi ki tetahi nā tēnei kaha hikohiko. Ki te kore te kaha karihi kaha, e kore e taea e ngā porotana i roto i te karihi te noho tahi nā te mea ka panaia ngātahitia e rātou.
Te Kaha Ā-Toi
He iti noa te awe o te kaha tōpana ki te tauine karihi nā te mea he ngoikore ki te whakataurite ki te kaha karihi kaha me te kaha hikohiko. Heoi, i roto i te horopaki o ngā mea whetū pērā i ngā whetu niutron, ngā pōro pango rānei, ka kaha te kaha tōpana.
Te Kaha Karihi Ngāwari
Ko te kaha karihi ngoikore te take o ngā tukanga pēnei i te pirau beta (he momo pirau irahiko), e huri ai te niutron hei porotona, hei hurihanga rānei. Ahakoa he ngoikore ake i te kaha karihi kaha me te kaha hikohiko, he mea nui tana mahi i roto i ngā āhuatanga irahiko me ētahi atu tauhohenga karihi.
3. Te Pūmautanga o ngā Karihi Atomika
Ko te pumau o te karihi ngota e whakawhirinaki ana ki te taurite i waenga i te kaha kukume karihi me te pana hikohiko i waenga i ngā porotini. Ko ētahi o ngā mea nui e pā ana ki te pumau o te karihi ngota ko:
Ōwehenga Pūtoroni ki te Neutron
He mea nui te taurite pai i waenga i te maha o ngā porotona me ngā iōnitara mō te pumau o te karihi. I te nuinga o te wā, he tata rite te maha o ngā porotona me ngā iōnitara o ngā karihi māmā pumau (he ōwehenga tata ki te 1:1), ko ngā karihi taumaha ia me nui ake ngā iōnitara hei whakau i te kukume hiko nui ake i waenga i te maha nui o ngā porotona.
Pūngao Herenga Atomika
Ko te pūngao here ngota ko te pūngao e hiahiatia ana hei wawahi katoa i te karihi ngota ki ngā porotana me ngā niutara takitahi. Ko ngā karihi he nui ake ngā pūngao here mō ia karihi ka noho pumau ake. Ko te kauwhata o te pūngao here mō ia karihi hei pānga o te tau papatipu e whakaatu ana i te tihi huri noa i ngā huānga he tata ki te 60 ngā tau papatipu, pērā i te rino.
Pānga Kiri Matua
Ko te ariā pānga anga o te tauira anga karihi e kī ana kua whakarōpūhia ngā anga ki roto i te anga i roto i te anga, he rite ki ngā irahiko i roto i te ngota. Ko ngā anga kua kī katoa (ngā tau makutu) he tino pumau.
4. Ngā Isotope
He rerekē ngā āhua o te huānga kotahi, he rite te maha o ngā porotana engari he rerekē te maha o ngā iōnitora. He rite tonu ngā āhuatanga matū o ngā iōnitora engari he rerekē rawa te pumau o te karihi. Hei tauira:
– Hauwai: Kei roto i ōna isotope te pūrotene (kāore he niutironi), te deuterium (kotahi te niutironi), me te tritium (e rua ngā niutironi).
– Waro: Kei roto i ōna isotope te waro-12 (ono ngā neutron), te waro-13 (whitu ngā neutron), me te waro-14 (waru ngā neutron). E mōhiotia whānuitia ana te waro-14 mō tōna whakamahinga i roto i te ine i te wā waro irirangi.
5. Ngā Tauhohenga Karihi me te Pūngao Karihi
He mahi nui tā te karihi ngota i roto i ngā tauhohenga karihi, ina puta he panoni i roto i te hanganga o te karihi i ngā huihuinga pērā i te hanumitanga karihi me te wehenga, ā, ka tukuna he nui rawa te pūngao.
Te Hanumitanga Karihi
I roto i te hanumitanga karihi, ka hanumi ngā karihi māmā e rua hei hanga i tētahi karihi taumaha ake, ka tukuna he nui rawa te pūngao i roto i te tukanga. Koinei te tauhohenga e whakakaha ana i te rā me ngā whetū, te wāhi e hanumi ai te hauwai hei hanga i te hēriuma.
Wehenga karihi
Ko te wehenga karihi te ritenga kē o te hanumi, arā, ko ngā karihi taumaha (pērā i te uranium-235, te plutonium-239 rānei) ka wehea kia iti ake, ka tukuna hoki he nui o te pūngao. Ka whakamahia tēnei pūngao i roto i ngā tipu hiko karihi me ngā patu karihi.
Te pirau o te irahiko
Ko te pirau irahiko te tukanga e tukuna ai e te karihi kore pumau ngā matūriki, ngā hihi rānei, kia eke ai ki tētahi āhua pumau ake. He momo pirau rerekē, pērā i te alpha, te beta, me te gamma, e uru ana ki ngā matūriki alpha (e rua ngā porotana me e rua ngā niutron), ngā irahiko, ngā positron rānei, me ngā photon pūngao-teitei.
6. Ngā Whakamahinga me ngā Pānga
Nā te mōhiotanga ki te karihi ngota me ngā tauhohenga karihi kua whakawātea i te ara mō ngā tono maha i roto i te pūngao, te rongoā, te whetū, me te pūtaiao rauemi. Heoi anō, kua puta mai hoki ngā wero e pā ana ki te haumaru karihi me te horapa o ngā patu karihi.
Pūngao Karihi
Ko te pūngao e puta mai ana i ngā tauhohenga wehenga i roto i ngā tauhohenga karihi he pūtake pūngao tino whai hua, he iti hoki te waro. Heoi, ko ngā wero o te whakahaere para irahiko me te mōrearea o ngā aituā he āwangawanga nui.
Rongoā karihi
E whakamahia ana ngā isotope irahiko mō te tātaritanga me te maimoatanga hauora, pērā i te tātaitanga wā irahiko waro i roto i ngā rangahau whaipara tangata me te wai, me ngā tikanga whakaahua hauora pērā i ngā matawai PET (Positron Emission Tomography).
Te horapa o ngā patu
He tūmomo mōrearea nui ngā patu karihi ki te haumarutanga o te ao, e hiahiatia ana he mahi kaha a te ao mō te whakahaere me te aukati i te horapa o aua patu karihi.
Whakamutunga
Mā te mārama ki ngā āhuatanga o te karihi ngota ka kitea he māramatanga hōhonu ki te āhua taketake o te matū me ngā kaha e awe ana i tō tātou ao. Mai i ngā āhuatanga taketake o ngā porotona me ngā niutoroneta, ki ngā kaha taketake e mahi ana i roto i te karihi, ki ngā tukanga o ngā tauhohenga karihi, kei te noho tonu te karihi ngota hei kaupapa rangahau pūtaiao e whānui haere ana me ngā tono whānui me ngā pānga nui. Ehara i te mea ka huaki noa i tēnei mātauranga te kuaha ki te auahatanga hangarau engari ka ārahi hoki ki ngā kawenga nui ki te whakahaere me te tiaki i te ao e noho nei tātou.
