rru,2 \ov
on rnr so t
M6n thi: vaT r,.f r-o pnAlv trNc HAT NHAX
(srl PHAM)
Thli gian lirm biri: 120 phft
Ngiy thi: ..
cAu I (1 aD. Phin rr?ng phin h?ch h4t nhin ueng neutron nhiQt. cho
mdt vi du.
c4u 2 Q d). MQt nhir miy rtiQn h3t nhin c6 c6ng suAt 300MW". HiQu
suit nhdr mriy ttiQn li 30%.
1. H6i s6 phAn h4ch xiy ra trong mQt ngiy.
2. IJ.bi t<triii tu.mg "tU Aiit cnay t.ot g mQt:ngay
Gie sfr mdi srp kign phfln h4ch t4o ra ZOOiVI"V.
CAU 3 (3 iI). X6t ph:in rring phffn h4ch sau: /
, jn * "ntru - ('ilu). -+ 'l!cs + linu + l(jn)+ E
Trong d6 3 neutron phan h4c^h trfrc thcri c6 tdng tt0n'g ning l^ s,2 Mev
vdr c6c tia gamma trfrc.thcri c6 t6ng ning l*gng oi rvr"v. rir nnng tliing vi
ngucri ta th6y sau 3 tAn phin r{ beta,-r*cs tr& thirnh ttiing vi 6cn tro"a.
vd sau 4 dn phfln ri beta, ntRb tr& thirnh diing vi bAn "Nn.Ilay tinh:
1. NIng luqng trfrc thtri giii ph6ng ra tir -srp kiQn phin hgch nAy.
2. Niing tuqrng phrflt ra th6m {o cic chu6i phffn ri beta thf'l sau khi
ptrAn h4ch.
3. Ning lugng phrlt ra th6m do cric chu6i ph6n ri beta thfi.,2 sau khi
nhin hach. )
cho bi6t : Kh6i luqng cfia 23su, tn, to'cs, ,rRb, tooC., ,tNb vi electron
lin 'lugt li 235,043i24; ,008665; 139,90910; 92,91699, 139,90543,
92,90638vdr0,0005486u. I Cr. , RL Cu
Flb t-
cAU 4 (4 d).
Virng holt cria mQt td phin li'ng trf,n giim nhidiu thanh kim loai uranium
tg nhi6n ddri c6 tlulng kinh is,+ ^i sip xt-ip trong tirng 6 vu6ng c6
cgnh 1-,52 dm vi nhring chim trong mQt thirng hinh vi6n trg chrfra nu6c
cd ti sii chidu cao - ttulng kinh l 1,2. Tir cric tintr ctrdt c,iu tit liQu ngucri
ta bi6t dugc B1, = 8,6m-2. Tfnh: y . 79 - r0r Vgt^)
1. Tfnh kfch thuri,c cfra virng ho?t: b6n kfnh R li bao nhi6u m vi
chi6u cao H Ii bao nhi6u m6t
2. Sii thanh nhi6n li_6u n ldr bao nhi6u thanh.
3. The tich nhi6n tiQu V lir bao "fri6r ilt f.frai.
4. Kh6i luqng nhiGn ligu M ti bao nhi6u tdn.
ffi e#n
-/fu--