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  1. Kf @i sa t) THr cu6r TPHCM Dar Hgc rnudr*c $t IHAM M6n: Phftn tich kich hogt neutron ' Khoo VAt U tf W C&NhAn L6P: Thdi'gtan: 90 Philt kfch hoet luu f co ban cta phuong ph6p ph6n tich 1: (2 d). Trinh bey rlguy6n tiic vn nhiing Clu neutron. 4 - -LA- +!^L lzirh hnof nerrfron d6i Vd' - Clu2:(25d)Trhhbiyn-guy€nticchuenbim6uph6ntichtrongph6rrtfchkichho4tneutond6iv6i vi mf,u l6ng' J6l-;dt'6,--ao bQt trong ph6n tich kich hoet neutron' cho biy c6c ngu6n neutron thuong dugc srr dgng 3: (3 it) Trinh cru il"qtei6* ctatlmg lo4i ngu6n' ,Qpot. 'tJ '- ;td; chdn c6 nguyen nguoi ta kh6ng tnc atrng v6t lieu che (2,5 d) chtmg t6 trong qh:.:ht neuton, clu 4: nn9' tt s6 ton mi ph6i dtng nhfitg vat hqu Sinhvi€n kh6ng sth &Pg tdi lieu' -- thich gi than' Ci" W coi tli-khdng gidi '. t 4/,,y
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