/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%?