Ubukhulu bebhodi le-boron-polyethylene buyi-2cm-30cm.Inkambu yayo yobuchwepheshe ukusetshenziswa kobuchwepheshe benuzi bokuvikela imisebe ye-ionizing.Ibhodi le-Boron-polyethylene lisetshenziselwa ukuvikela ama-neutron asheshayo enkundla yemisebe ye-neutron, i-neutron kanye nenkundla yemisebe exubile engu-Y emkhakheni wokuvikelwa kwemisebe ye-ionizing, ukuvimbela ukulimala kwemisebe kanye nomonakalo obangelwa imisebe ye-neutron kubasebenzi abasebenza emsebenzini kanye nomphakathi.
Ukuze kuthuthukiswe umphumela wokuvikela we-boron polyethylene ku-neutron esheshayo futhi uxazulule inkinga yokuthi kunzima ukukhiqiza ibhodi le-boron polyethylene ngokuthengisa e-China, ibhodi le-polyethylene eliqukethe i-boron elinokuqukethwe kwe-boron engu-8% lakhiwe.Ngokwesimiso sokuvikela ama-neutron asheshayo, njengoba ingxenye esele ye-neutron ingu-1.0086649U, kuyilapho leyo yama-athomu e-hydrogen (okungukuthi ama-proton) ingu-1.007825 U [1], inqwaba ye-athomu ye-neutron iseduze ne-athomu ye-hydrogen.Ngakho-ke, lapho i-neutron esheshayo ishayisana ne-nuclei ye-hydrogen emzimbeni ovikelayo, Kulula kakhulu ukulahlekelwa amandla ngokuwadlulisela ku-nucleus ye-athomu ye-hydrogen, ukunciphisa ama-neutron asheshayo ukuze aphuze ama-neutron nama-thermal neutron.Lapho umzimba ovikelayo uqukethe i-hydrogen eyengeziwe, umphumela wokulinganisa uzoba namandla.Phakathi kokuqukethwe kwe-hydrogen kwezinto ezivame ukusetshenziswa ze-neutron zokuvikela, okuqukethwe kwe-hydrogen ku-polyethylene kuphezulu kakhulu, kufika ku-7.92x IO22 ama-athomu / cm3 igesi.Ngakho-ke, i-polyethylene ingumongameli ongcono kakhulu wokuvikela ama-neutron asheshayo.Ngemuva kokuthi ama-neutron asheshayo ehliswe ijubane abe ama-neutron ashisayo, izinto ezivikelayo ezinengxenye enkulu yokumuncwa kwe-neutron eshisayo ngaphandle kwemisebe ye-Y enamandla kakhulu iyadingeka ukumunca ama-neutron ashisayo, ukuze kufezwe inhloso yokuvikela ama-neutron asheshayo ngokuphelele.Ngenxa yokumuncwa kwe-neutron ephezulu eshisayo engu-(3840 lL) X10_24cm2[3], kanye nobuningi be-kiB ku-boron yemvelo ingu-18.98% [3], okutholakala kalula, izinto eziqukethe i-boron zimunca kahle ukuvikela ukushisa okushisayo. ama-neutron.
Ukuvikelwa kwemisebe ye-neutron ezitshalweni zamandla enuzi, ama-accelerator amandla aphakathi (phezulu), ama-athomu, imikhumbi-ngwenya yenuzi, izisheshisi zezokwelapha, imishini yokwelapha i-neutron nezinye izindawo.
Isikhathi sokuthumela: May-31-2022
