/J tl,t LMIYM%, Dt rru crtfa rci _ I{Siv 10/11n010 Man thi: vAr r,f r,o PHAN tNc HAT NrrAN (Thdi gian: 60 phft) cAu I (2 d). Phan h4ch U235 bing neuron cho hai san phAm phan hgch Ndl4e vd Ge85. a. Tinh ndng lugng li6n ki5t m6i nucleon cta ,lJ"t, *Ndton vi 32Ge85. Cho biiSt mn: 1,008655 q' rrH: 1,007825 u, M(Uttt) :235,043933 u, M(Ndton) :148,92O144 u vi M(Ge85) :84,942690 u. b. Tinh neng fugrg ph6t ra tong sU kien phan h4ch t€n. CaU 2 Q d). Tinh tiiSt diQn hi€u dUng tin x4 vi m6 cria uranium tU nhi€n gdm c6 U235 vi U2t8. Cho bitit mQt dQ uranium t.u nhi€n ld l8,g glcni, khOi luqng phan trem cria U235 h 0,713. fi6t dien t6nx4 vi m6 cria U235 vi U238 lin luqt ld 15 b vd 13,8 b. cAu 3 (3 d). MQt chrh tia neuron don ntuig co cuong dO 4.1010 n crn 2s r , ti6t diQn chim tia 1 cm'd4p vdo mQt bia c6 mat dO 0,048.102a nguy6n th/cm3,UA Oay 0,.1 " vdti6t dign hibu dung vi md t6ng cQng 4,5 b. c. Tinh ti€t di$n hiQu dUng vi m6. d. io baolhigr tuong taCtrong m5i giay xiy ra trong bia ? e. X6c su6t d€ mQt neutron c6'mQt va chgm trong bia ld bao nhi€u ? fiSt tu4n gi t cAu 4 (3 d). ry10t ld phan img san xu6t'diQn nlng c6ng srdt goo Mw. H6i khtii luqng UT5 diSt ch6y trong mQt ngdy li bao nhi6u ntiu nieu s*5t nha may tti€n ld 30%? . nucleon cta ,lJ"t, *Ndton vi 32Ge85. Cho biiSt mn: 1,008655 q' rrH: 1,007 825 u, M(Uttt) :23 5,043 933 u, M(Ndton) :148,92O144 u vi M(Ge85) :84,9 426 90 u. b. Tinh neng fugrg ph6t. t€n. CaU 2 Q d). Tinh tiiSt diQn hi€u dUng tin x4 vi m6 cria uranium tU nhi€n gdm c6 U235 vi U2t8. Cho bitit mQt dQ uranium t.u nhi€n ld l8,g glcni, khOi luqng phan trem cria U235. /J tl,t LMIYM%, Dt rru crtfa rci _ I{Siv 10/11n010 Man thi: vAr r,f r,o PHAN tNc HAT NrrAN (Thdi gian: 60 phft) cAu I (2 d). Phan h4ch U235 bing neuron cho hai san phAm phan hgch Ndl4e vd