He pānga nui te kino o te paura karāpiti ki te mahi hangarau me te mahi ōhanga o te tauhohenga, inā koa te tauhohenga hau-whakamatao pāmahana teitei o te moenga kirikiri. Ko te tikanga o te whakaōrite irahiko ko te marara ngāwari o ngā irahiko me ngā ngota o te rauemi whakaōrite, ā, ko te pūngao e haria ana e rātou ka tukuna ki ngā ngota o te rauemi whakaōrite. He kaitono pai hoki te paura karāpiti mō ngā rauemi plasma-arotahi mō ngā tauhohenga hanumi karihi. Ko ngā ētita e whai ake nei mai i Fu Ruite e whakaatu ana i te whakamahinga o te paura karāpiti i roto i ngā whakamātautau karihi:
I te pikinga ake o te awe o te niutoro, ka mimiti te paura karāpiti i te tuatahi, ā, i muri i te taenga ki tētahi uara iti, ka heke te mimiti, ka hoki ki te rahi taketake, kātahi ka tere te horapa. Hei whakamahi pai i ngā niutoro i tukuna e te wehenga, me whakaroa. Ka whiwhihia ngā āhuatanga wera o te paura karāpiti mā te whakamātautau irahiko, ā, me rite ngā āhuatanga whakamātautau irahiko ki ngā āhuatanga mahi tuturu o te tauhohenga. Ko tētahi atu huarahi hei whakapai ake i te whakamahinga o ngā niutoro ko te whakamahi i ngā rauemi whakaata hei whakaata i ngā niutoro e turuturu ana i waho o te rohe tauhohenga wehenga karihi-matua. Ko te tikanga o te whakaata niutoro ko te marara ngāwari o ngā niutoro me ngā ngota o ngā rauemi whakaata. Hei whakahaere i te ngaronga i puta mai i ngā poke ki te taumata e whakaaetia ana, me parakore te paura karāpiti e whakamahia ana i roto i te tauhohenga.
Ko te paura karāpeti karihi he peka o ngā rauemi paura karāpeti i whakawhanakehia hei whakautu i ngā hiahia o te hanga i ngā tauhohenga wehenga karihi i te tīmatanga o te tekau tau atu i 1940. E whakamahia ana hei kaiwhakarite, hei whakaata me ngā rauemi hanganga i roto i ngā tauhohenga whakaputa, ngā tauhohenga whakamatao-hau me ngā tauhohenga whakamatao-hau pāmahana teitei. Ko te tūponotanga o te tauhohenga o te niutron ki te karihi e kiia ana ko te wāhanga whakawhiti, ā, ko te wāhanga whakawhiti wehenga niutron wera (pūngao toharite o te 0.025eV) o te U-235 e rua ngā taumata teitei ake i te wāhanga whakawhiti wehenga niutron wehenga (pūngao toharite o te 2eV). Ka piki ake te modulus elastic, te kaha me te tauwehenga whānui raina o te paura karāpeti me te pikinga o te rere o te niutron, ka eke ki te uara nui, kātahi ka heke tere. I te tīmatanga o te tekau tau atu i 1940, ko te paura karāpeti anake i wātea i te utu whaitake e tata ana ki tēnei parakore, koia te take i whakamahia ai e ia tauhohenga me ngā tauhohenga whakaputa i muri mai te paura karāpeti hei rauemi whakaōrite, e arahi ana ki te wā karihi.
Ko te mea nui ki te hanga paura karāti isotropic ko te whakamahi i ngā matūriki kōka me te isotropy pai: ko te kōka isotropic, ko te kōka tuarua macro-isotropic rānei i hangaia mai i te kōka anisotropic, ā, ko te hangarau kōka tuarua te mea e whakamahia whānuitia ana i ēnei rā. Ko te rahi o te kino irahiko e pā ana ki ngā rauemi mata o te paura karāti, te tukanga hanga, te tere o te rere me te tere o te rere o te irahiko, te pāmahana irahiko me ētahi atu āhuatanga. Me tata ki te 10~6 te ōrite o te boron o te paura karāti karihi.
Wā tuku: Mei-18-2022