Akụkọ

Ọkpụrụkpụ nke mbadamba boron-polyethylene bụ 2cm-30cm. Mpaghara nka ya bụ ngwa teknụzụ nuklia nke ionizing nchebe radieshon. 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 osisi boron polyethylene na-ere ahịa na China, e mepụtara osisi polyethylene nwere boron nwere boron ọdịnaya 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 ngwa ngwa neutrons 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 neutron ngwa ngwa na-agbada n'ime neutrons thermal, ihe nchebe nwere nnukwu ikuku neutron absorption cross ngalaba na-enweghị ike ike Y radieshon dị mkpa iji banye neutrons thermal, iji 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, boron-nwere ihe ndị dị mma absorbent maka ikpuchi thermal neutrons.
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.