Nūhou

ʻO ka mānoanoa o ka papa boron-polyethylene he 2cm-30cm. ʻO kāna kahua ʻenehana ka noi ʻenehana nuklea o ka pale ʻana i ka radiation ionizing. Hoʻohana ʻia ka papa Boron-polyethylene no ka pale ʻana i nā neutrons wikiwiki o ka neutron radiation field, neutron a me Y mixed radiation field i ke kahua o ka pale radiation ionizing, e pale i ka pōʻino a me ka pōʻino i hana ʻia e ka neutron radiation i nā limahana hana a me ka lehulehu.
No ka hoʻomaikaʻi ʻana i ka hopena pale o ka boron polyethylene ma ka neutron wikiwiki a hoʻonā i ka pilikia he paʻakikī ke hana ʻana i ka papa boron polyethylene ma ke kālepa ma Kina, ua kūkulu ʻia kahi papa polyethylene boron me 8% o ka boron. Ma nā ʻōlelo o ke kumu o ka pale ʻana i nā neutrons wikiwiki, ʻoiai ʻo ke koena o nā neutrons he 1.0086649U, ʻoiai ʻo nā mana hydrogen (ʻo ia hoʻi nā protons) ʻo 1.007825 U [1], ua kokoke ka nuipa atomika o nā neutrons i kēlā o nā mana hydrogen. No laila, i ka wā e hui ai ka neutron wikiwiki me ka nuclei hydrogen i loko o ke kino pale, ʻoi aku ka maʻalahi o ka lilo ʻana o ka ikehu ma ka hoʻoili ʻana i ka nucleus o ka hydrogen atom, e hoʻolohi i nā neutrons wikiwiki e hoʻolōʻihi i nā neutrons a me nā neutrons thermal. ʻOi aku ka nui o ka hydrogen i loko o ke kino pale, ʻoi aku ka ikaika o ka hopena hoʻololi. Ma waena o ka hydrogen maʻiʻo o nā mea pale neutron maʻamau, ʻo ka maʻi hydrogen o ka polyethylene ka mea kiʻekiʻe loa, a hiki i ka 7.92x IO22 atoms /cm3 kinoea. No laila, ʻo ka polyethylene ka mea hoʻoponopono maikaʻi loa no ka pale ʻana i nā neutron wikiwiki. Ma hope o ka wikiwiki neutrons ua lohi iho i thermal neutrons, pale mea me ka wela nui neutron absorption kea pauku me ka kiʻekiʻe-ikaika Y pāhawewe pono e komo thermal neutrons, no laila, e hoʻokō i ke kumu o ka pale aku wikiwiki neutrons loa. Ma muli o ke kiʻekiʻe o ka neutron absorption cross section o (3840 lL)X10_24cm2[3], a ʻo ka nui o kiB i loko o ka boron maoli he 18.98% [3], he mea maʻalahi ke loaʻa, ʻoi aku ka maikaʻi o nā mea i loaʻa i ka boron no ka pale ʻana i nā neutron thermal.
ʻO ka pale ʻana i ka radiation Neutron i nā mea kanu nuklea, medium (high) energy accelerators, atomic reactors, nuclear submarines, medical accelerators, neutron therapy a me nā wahi ʻē aʻe.