Akụkọ

Ọkpụrụkpụ nke mbadamba boron-polyethylene bụ 2cm-30cm.Mpaghara teknụzụ ya bụ ngwa teknụzụ nuklia nke nchebe radieshon ionizing.A na-eji bọọdụ boron-polyethylene kpuchido ngwa ngwa neutrons nke ubi radieshon neutron, neutron na Y ngwakọta radieshon n'ọhịa nke ionizing radieshon nchedo, iji gbochie radieshon mmerụ na mmebi nke neutron radieshon kpatara na-arụ ọrụ na ọha na eze.
Iji mee ka mmetụta nchebe nke boron polyethylene dịkwuo mma na neutron ngwa ngwa ma dozie nsogbu ahụ na ọ na-esiri ike ịmepụta boron polyethylene panel nke azụmahịa na China, a na-emepụta bọọdụ polyethylene nwere boron nwere ọdịnaya boron nke 8%.N'ihe gbasara ụkpụrụ nke ichebe neutron ngwa ngwa, ebe ọ bụ na nke fọdụrụ neutrons bụ 1.0086649U, ebe nke hydrogen atom (ie protons) bụ 1.007825 U [1], atomic mass nke neutrons dị nso na nke hydrogen atom.Ya mere, mgbe neutron ngwa ngwa na-adaba na hydrogen nuclei n'ime ahụ mkpuchi ahụ, ọ kachasị mfe ịkwụsị ume site na ibufe ya na nucleus nke atom hydrogen, na-ebelata neutron ngwa ngwa iji mee ka neutrons na neutrons dị ọkụ kwụsị.Ka hydrogen na-ebuwanye ibu ahụ ahụ na-echebe, otú ahụ ka mmetụta na-agbanwe agbanwe ga-esiwanye ike.N'ime ọdịnaya hydrogen nke ihe mkpuchi neutron a na-ejikarị, ọdịnaya hydrogen nke polyethylene bụ nke kachasị elu, ruo 7.92x IO22 atom / cm3 gas.Ya mere, polyethylene bụ onye nhazi kachasị mma maka ikpuchi neutron ngwa ngwa.Mgbe neutrons ngwa ngwa na-agbada n'ime neutrons thermal, ihe nchebe nwere nnukwu ikuku neutron absorption cross section na-enweghị ike ọkụ Y radieshon dị mkpa iji nweta neutrons thermal, ka e wee nweta nzube nke ichebe neutrons ngwa ngwa kpamkpam.N'ihi na elu thermal neutron absorption cross section of (3840 lL)X10_24cm2[3], na ụba nke kiB na eke boron bụ 18.98% [3], nke dị mfe inweta, ihe nwere boron bụ ezigbo absorbent maka ikpuchi thermal. neutron.
Nchekwa radieshon Neutron n'ime ụlọ ọrụ ike nuklia, ndị na-eme ngwa ngwa (elu) ume ike, ndị na-ahụ maka atomiki, ụgbọ mmiri okpuru mmiri nuklia, ngwa ngwa ahụike, akụrụngwa ọgwụgwọ neutron na ebe ndị ọzọ.