Ngā Pūrongo

Ko te matotoru o te papa boron-polyethylene he 2cm ki te 30cm. Ko tōna mara hangarau he tono hangarau karihi mō te tiaki i te irahiko ionizing. Ka whakamahia te papa boron-polyethylene hei tiaki i ngā neutron tere o te mara irahiko neutron, te neutron me te mara irahiko whakauru Y i roto i te mara tiaki i te irahiko ionizing, hei ārai i te kino me te kino o te irahiko i puta mai i te irahiko neutron ki ngā kaimahi mahi me te marea.
Hei whakapai ake i te pānga tiaki o te polyethylene boron ki te neutron tere, me te whakaoti rapanga he uaua ki te hanga papa polyethylene boron arumoni i Haina, i whakawhanakehia he papa polyethylene kei roto te boron me te ihirangi boron o te 8%. Mō te kaupapa o te tiaki i ngā neutron tere, i te mea ko te taumaha toenga o ngā neutron he 1.0086649U, ko te taumaha o ngā ngota hauwai (arā, ngā porotoni) he 1.007825 U [1], he tata te taumaha ngota o ngā neutron ki te taumaha o ngā ngota hauwai. Nō reira, ina tukinga te neutron tere ki ngā karihi hauwai i roto i te tinana tiaki, ka ngāwari te ngaro o te pūngao mā te whakawhiti ki te karihi o te ngota hauwai, ka whakaroa i ngā neutron tere ki ngā neutron puhoi me ngā neutron wera. Ko te nui ake o te hauwai kei roto i te tinana tiaki, ka kaha ake te pānga whakaōrite. I roto i te nui o te hauwai o ngā rauemi tiaki neutron e whakamahia whānuitia ana, ko te nui o te hauwai o te polyethylene te mea teitei rawa, tae atu ki te 7.92x IO22 ngota /cm3 hau. Nō reira, ko te polyethylene te kaiwhakaōrite pai rawa atu mō te tiaki i ngā neutron tere. I muri i te whakaroa i ngā neutron tere ki roto i ngā neutron wera, me whakamahi ngā rauemi tiaki he nui te wāhanga whakawhiti mimiti neutron wera, kāore he hihi Y teitei-pūngao hei mimiti i ngā neutron wera, kia tutuki ai te kaupapa o te tiaki katoa i ngā neutron tere. Nā te nui o te wāhanga whakawhiti mimiti neutron wera o (3840 lL)X10_24cm2[3], me te nui o te kiB i roto i te boron taiao he 18.98% [3], he ngāwari ki te tiki, he pai te mimiti o ngā rauemi kei roto te boron hei tiaki i ngā neutron wera.
Te tiaki i te irahiko neutron i roto i ngā tipu hiko karihi, ngā whakateretere pūngao reo (tiketike), ngā tauhohenga ngota, ngā ruku wai karihi, ngā whakateretere hauora, ngā taputapu whakaora neutron me ētahi atu wāhi.