TRUON(i DAI HQC SUPHAM TP.HCM KHOA VAT Lf of rru xnr rnuc Hec pnAN Iil.0 cUNHAN i IIOC rci: I hlH: 2010 - 2011 Lop: Ct nhan i:l pr thi' LA" I ril #t"#ffi $n,Y*il:; *TJlSTn* u. Ciu I 6 tti6m;: Trinh biy tuung ftlc cria neutron v6i vflt chat? D4i lugmg vgt lf niro itic trung cho tuang tdc cria neutron vdi v$t chdt, vi6t bi6u thrri'c tfnh todn tl4i lugmg niy Oving ning luqmg th6p? Ciu 2 (3 di6m): T4i sao llidro vi Deterium thudmg tlu-trc sr? dgng lirm chdt Erm ch$m neutron trong ld phin litg. Ap dpng tfnh ti6t diQn hdp thg neutron cfra Hidro tli ning luqng 50eV Uiiit ti6t OiQn hdp thg neutron t4i ning tuqng E6 = 0,0253eV li 0,332b. ( gS, etr b ) " - -t t- t -;- lt ;-lt -U y ,l \ Ciu 3 (3 tli€m): Tinh sii va ch4m trung binh ciri ttridt AO hrm ch$m neutron vri,i niing lugnrg 2NIeV tr6,i niing lugng nhiQt 0,0253eV trOn c6c vgt liQu sau: a. Tritium (A: 3) Vl ) b. Bqon (A: l0) (9+ ) \ c. Urannium (A:238) -(A t+t 1 L t/ d; - Sinh viGn tlugc sfr dTng tiri liQu khi lim biri. - C{n bQ coi thi kh6ng giii thfch gi th6m. H9 t€n sinh vi€n: 56 b6o danh: Ky duyQt di ctia tru&ng b0 m6n: r\' rrl 02-uo \5 L lr"'r IE- E ';- V, FI &D . OiQn hdp thg neutron t4i ning tuqng E6 = 0,0253eV li 0 ,332 b. ( gS, etr b ) " - -t t- t -; - lt ;-lt -U y ,l Ciu 3 (3 tli€m): Tinh sii va ch4m trung binh ciri. th6p? Ciu 2 (3 di6m): T4i sao llidro vi Deterium thudmg tlu-trc sr? dgng lirm chdt Erm ch$m neutron trong ld phin litg. Ap dpng tfnh ti6t diQn hdp thg neutron cfra Hidro tli ning luqng. biy tuung ftlc cria neutron v6i vflt chat? D4i lugmg vgt lf niro itic trung cho tuang tdc cria neutron vdi v$t chdt, vi6t bi6u thrri'c tfnh todn tl4i lugmg niy Oving ning