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  1. ..--_-:-iw-@ F3Q. T) ( rrUdrvc n6 cui DHSp rp. rranur hoi Xi hQi Chfi nghia ViQt nam CQng - KHoA vAr r-Y Hanh phfc D6c l6p - TrJ do - rru Hec pnAN: vAr ry rudNc BS KE _ Hp cuNHAN lim bdi: Thdi gian phrit 120 I : Khf electron trong CAu Fe. U Dung c6ng thric tt4 t5 tr4ng th6i dk(p) cria c6c electron c6 ttQ l6n dQng lugng trong khoingp viLp + dp dE mn truc fidp dQng luqng Fermi vd suy ra bi6u thric cria n[ng luqng Fermi. 2/ Cho bii5t so electron ho'6 tr! cta m6i nguyon ta Feh 2 vd mric n6ng luqng Fermi cria Fe ld ll,l eV- Cho h=6,625x10-3a,/.s, kh6i luqng electron : 9,lx l0-3rftg: H6y tinh mflt rlQ nguy6n tft Fe. Cho : leV = l,6x 10-reJ Cffu II: S{ ne! trung binh cria khi Bose ti tu&ng llHay viist bi6u thric vd vE sg biiSn thiOn cfia s6 hpt trung binh N theo ndng lucrng cria he khi Bose li tudng 6 nhiet d0 z vd c6 th6 ho6 hqc p. Gihithich. 2/vc ton cunq mQt dd thi cdc
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