Ukobvu hweboron-polyethylene board ndeye 2cm-30cm.Nzvimbo yayo yehunyanzvi ndeye nyukireya tekinoroji yekushandisa yeionizing radiation kuchengetedza.Boron-polyethylene bhodhi inoshandiswa kudzivirira manyuturoni anokurumidza eiyo neutron radiation munda, neutron uye Y yakasanganiswa nemwaranzi munda mumunda weionizing kuchengetedzwa kwemwaranzi, kudzivirira kukuvadzwa nemwaranzi uye kukuvadzwa kunokonzerwa nenyuturoni mwaranzi kune vashandi vebasa uye veruzhinji.
Kuti uvandudze kudzivirirwa kwe boron polyethylene pa-fast neutron uye kugadzirisa dambudziko rekuti zvakaoma kubudisa boron polyethylene board yekutengesa muChina, boron-ine polyethylene board ine boron content ye8% yakagadzirwa.Panyaya yemusimboti wekudzivirira manyuturoni anokurumidza, sezvo huremu hwemanyuturoni hwasara 1.0086649U, nepo maatomu ehydrogen (kureva mapurotoni) ari 1.007825 U [1], huremu hweatomu hwemanyutroni huri pedyo nehwemaatomu ehydrogen.Naizvozvo, kana neutron inokurumidza kudhumhana nenyutroni yehydrogen mumutumbi unodzivirira, Zviri nyore kurasikirwa nesimba nekuiendesa kunucleus yeatomu rehydrogen, inonoke manyuturoni anokurumidza kunonoka manyutroni uye manyuturoni anopisa.Iyo yakawanda yehaidhirojeni iyo inodzivirira muviri ine, iyo yakasimba iyo yekumisikidza mhedzisiro ichave.Pakati pezvinyorwa zvehydrogen zvezvinowanzo shandiswa neutron shielding materials, iyo hydrogen yemukati me polyethylene ndiyo yakakwirira, inosvika 7.92x IO22 maatomu / cm3 gasi.Naizvozvo, polyethylene ndiyo yakanakisa moderator yekudzivirira manyutroni anokurumidza.Mushure mekukurumidza manyuturoni adzikiswa kuita manyuturoni anopisa, zvidziviriro zvine hombe yekupisa neutron absorption cross section isina high-energy Y mwaranzi inodiwa kutora manyuturoni anopisa, kuitira kuzadzikisa chinangwa chekudzivirira manyutroni anokurumidza zvachose.Nekuda kweiyo yakakwira yekupisa neutron absorption cross chikamu che (3840 lL) X10_24cm2[3], uye kuwanda kwekiB mu natural boron i18.98% [3], iri nyore kuwana, boron-ine zvinhu zvinotora zvakanaka kudzivirira kupisa. manyuturoni.
Neutron radiation kuchengetedzwa mumagetsi emagetsi enyukireya, yepakati (yakakwirira) simba rekumhanyisa, maatomu maatomu, nyukireya dzepasi pemvura, zvekurapa accelerators, neutron therapy michina nedzimwe nzvimbo.
Nguva yekutumira: May-31-2022
