Phan h4ch U235 bing neuron cho hai san phAm phan hgch Ndl4e vd Ge85.. Tinh neng fugrg ph6t ra tong sU kien phan h4ch t€n.. Tinh ti€t di$n hiQu dUng vi m6.. io baolhigr tuong taCtrong m5i
Trang 1tl,t
LMIYM%,
Dt rru crtfa rci
Man thi: vAr r,f r,o PHAN tNc HAT NrrAN
(Thdi gian: 60 phft)
cAu I (2 d) Phan h4ch U235 bing neuron cho hai san phAm phan hgch
Ndl4e vd Ge85.
a Tinh ndng lugng li6n ki5t m6i nucleon cta ,lJ"t, *Ndton vi 32Ge85.
Cho biiSt mn: 1,008655 q'
rrH: 1,007825 u,
M(Uttt) :235,043933 u,
M(Ndton) :148,92O144 u vi
M(Ge85) :84,942690 u.
b Tinh neng fugrg ph6t ra tong sU kien phan h4ch t€n.
CaU 2 Q d) Tinh tiiSt diQn hi€u dUng tin x4 vi m6 cria uranium tU nhi€n
gdm c6 U235 vi U2t8 Cho bitit mQt dQ uranium t.u nhi€n ld l8,g glcni,
khOi luqng phan trem cria U235 h 0,713 fi6t dien t6nx4 vi m6 cria U235 vi
U238 lin luqt ld 15 b vd 13,8 b
cAu 3 (3 d) MQt chrh tia neuron don ntuig co cuong dO 4.1010 n crn 2s r
,
ti6t diQn chim tia 1 cm'd4p vdo mQt bia c6 mat dO 0,048.102a nguy6n
th/cm3,UA Oay 0,.1
" vdti6t dign hibu dung vi md t6ng cQng 4,5 b.
c Tinh ti€t di$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%?