TRUONG DAI HQC SUPHAM T".HCM

Br rro 16r NGHTEp DAr Hgc sp cuirvlr eur rqAvr zlrt . NL*h eao tao' Vai tli rrqt Hoc phdn thi: VQt ly Nguy0n tir vd h4t nhdn Thoi gian lim bii: 150 phrit kh6ng tO ttrOi gian ph6t d0

Ciu 1(2 di6m)

lap..ta€-'thric bAt dinh

Ileisenberg..

a) Tir thi nghiQm nhiSu x4 cria chum h4t vi md hdy thi€t ,///

b) Sft dung hQ thirc bAt dinh Heisenberg d6nh gi6 mftydang lugng nho nhAt ctra electron trong nguy6n tu hydro. Coi d0 U6t Onn vC b6n kiffna electron li b5n kinh Bohr

= 0,529.10-8 cm.

1t hne2 Ciu2 (3 di6m)

"ua.electron

trong nguydn tu hidr6 o trang th6i kich thich bi6t ring ndng loo-ng kich thich truyAn cho nguy6n tu tu tr4ng thfi co bin li 10,2 eV vi c6 chri y tdi quy tic lgc ltra. Tim chc gi|tri hinh chiOu m6men qu! dao L, tr6n truc Oz o trang thdi trOn.

b) Trinh biy thi nghiQm Stern vir Gerlach vO ph6t hiOn spin cua hat vi m6. Tt' d6 hay

A.

n6u c6c s6 lugng tu c6 thO d[c trung cho electron trong nguy6n ttr. ..

a) Xac dinh giA tri m6men qfly dao I

toirn phdn kh6ng song song vcri v6c to md men fir cta electron.

Qp phuong ph,lp Cto tI€ xac dlnh tudi m5u vdt 96.

Cfiu 3 (2,5 tli6m) --:- - fit;;

c) X6c dinh d0 l6n md men toin phdn o c6c trang thrli trOn vh chiing to vdc to m6 men

_ b) X5c

Ngudi ta th6y ring chi c6 cdc br?c xa gamma (7) duoc phSt ra khi cho m6t chirm hat neutron mang ndng luong 3,2MeV ddp vdo bia lBe, cfuctia Gamma ndy c6 phucrng hqp vdi phucrng chuyOn dQng cira neutron mQt g6c 0 = 600. (86 qua hiQu img tucrng O6i tinti;.

a) H6y vi6t phuong trinh cria phdn ring tr6n. b) Tim ndng luong ctra cdc birc xa gamma ph6t ra vd ndng lugng cira hat nhdn tao

thinh sau phin ring? Cho cdc sA lieu sou: M,r" = 9,012186tt, M,,8"= 10,013534u, M,= 1,00866512

lu:931,5 MeVic2

- Sinh vi6n khdne a*q;;;;;il;ff?;;i;;;;;:---: - Cin b$ coi thi khdng giii thich gi th6m.