Akụkọ

Ọkpụrụkpụ nke bọọdụ boron-polyethylene dị 2cm-30cm. Ọgbọ teknụzụ ya bụ iji teknụzụ nuklia eme ihe maka nchekwa radieshọn ionizing. A na-eji bọọdụ boron-polyethylene echebe neutrons ngwa ngwa nke ubi radieshọn neutron, neutron na ubi radieshọn agwakọta Y n'ọhịa nke nchekwa radieshọn ionizing, iji gbochie mmebi radieshọn na mmebi nke radieshọn neutron na-akpata nye ndị ọrụ ọrụ na ọha na eze.
Iji melite mmetụta nchebe nke boron polyethylene na neutron ngwa ngwa ma dozie nsogbu ahụ na ọ siri ike imepụta bọọdụ polyethylene boron na azụmaahịa na China, e mepụtara bọọdụ polyethylene nwere boron nke nwere ọdịnaya boron nke 8%. N'ihe gbasara ụkpụrụ nke ichebe neutron ngwa ngwa, ebe ọ bụ na oke neutron ndị ọzọ bụ 1.0086649U, ebe nke atọm hydrogen (dịka protons) bụ 1.007825 U [1], oke atọm nke neutron dị nso na nke atọm hydrogen. Ya mere, mgbe neutron ngwa ngwa na-adakọ na nuclei hydrogen dị n'ahụ ihe nchebe, ọ dị mfe ịlafu ike site n'ibufe ya na nucleus nke atọm hydrogen, na-ebelata neutron ngwa ngwa iji belata neutron na neutrons okpomọkụ. Ka hydrogen ahụ ihe nchebe na-enwekwu, otú ahụ ka mmetụta nhazi ga-esi ike. N'ime ihe ndị dị na hydrogen nke ihe ndị a na-ejikarị eme ihe maka nchebe neutron, ọdịnaya hydrogen nke polyethylene kachasị elu, ruo atọm IO22 7.92x / cm3 gas. Ya mere, polyethylene bụ ihe nhazi kachasị mma maka ichebe neutrons ngwa ngwa. Mgbe emechara ka neutrons ngwa ngwa ghara ịdị n'ime neutrons okpomọkụ, ihe ndị nwere nnukwu akụkụ cross absorption neutron okpomọkụ na-enweghị radieshon Y dị elu dị mkpa iji nabata neutrons okpomọkụ, iji mezuo ebumnuche nke ichebe neutrons ngwa ngwa kpamkpam. N'ihi nnukwu ngalaba cross absorption neutron okpomọkụ nke (3840 lL)X10_24cm2[3], na oke kiB dị na boron eke bụ 18.98% [3], nke dị mfe inweta, ihe ndị nwere boron dị mma maka nchekwa neutrons okpomọkụ.
Nchedo radieshon neutron n'ime ụlọ ọrụ ike nuklia, ihe na-eme ka ike dịkwuo elu, ihe na-eme ka atomiki dị n'okpuru mmiri nuklia, ihe na-eme ka ahụike dị ngwa ngwa, ngwa ọgwụgwọ neutron na ebe ndị ọzọ.