: Mathematics Phvsics TX.XIỊ No2AP 200<.r PPin
7. Thuyet minh su can thiet hinh thanh dur an
- T6ng quan cac c6ng trinh nghiSn cihi trong va ngoai nude lidn quan toi
v ^ d6 nghien cthi cua di tai:
Notron va bu:c xa gamrna la nhung biic xa duoc su dung nhieu trong nghien cihi vat ly hat nhan ca ban va img dung. Qua trinh sinh ra burc xa nay cung nhu niong tac cua chiing voi vat chat di6n ra raft phuc tap, phan bc^ nang luong, th6ng luong cua cac bu:c xa ncrtron va buc xa ham tir cac nguon khac nhau la khfing hoan tọin gi6ng nhaụ Nghien ciiu dac tnmg pho biic xa ham va natron sinh ra tur electron tuang tac voi vat ch^t la doi hoi thuc t^, co y nghia khoa hoc va thuc tiln da va dang duoc tri^n khai nghien cihi a tren the gioi, Yuri
M.Tsipennyuc (2002), Afacure (2005) va a Viet Nam, Nguyen Van £>b va Trdn
Diic Thiep (2005).
Doi voi cac nsuon biic xa ham va natron sinh ra do tircmg tac cua electron vcyi cac bia ham lákim loai nang cung nhu cac nguon biic xa sinh ra tir electron nang Itrcmg cao (hang tram MeV va GeV) so lieu thuc nghiem chua nhieụ sir phu^hcfp giua cac ket'^qua thirc nghiem va tien doan ly thuyet chua caọ Vi vay trong nhung nam gan day tren the gioi va Viet Nam nhieu tac gia da tap trung nghien cuu dac trung phan bo nang lugng va goc cua notron va biic xa ham dugc sinh ra tren cac bia kim loai nang dac biet doi vdi chum electron nang lugng cao tir ham tram MeV tro len, .'Vrilla kitamuna (2003). Nguyen Van D6
(2006). Viec tnen khai va thuc hien thiuih cong de tai gop phan lam sang to ca
che tao biic xa ham va notron do tuong tac cua electron dugc gia toe voi kim
loai nang dona thm h6 sung cac so lieu thuc nghiem ve dac trung cua birc xa
notron viíbiic xa ham do electron nang lucmg cao vm vat chat tao rạ
Cac kcL qua thu duoc cua Je lai ia ca sa khua hoc de inén co hicu c;ua viec x'k dinh cac dac tnms ciia pho birc xa ham va natron .inri ra tren may gia toe electron se dt'oc trang^bi tai Bo mon Vat ly hat nhan. Khoa Vat !ỵ Tru-ong Dai hoc Khoa I w Tu nhTen. CJc thong -^o dac irung ve phan bo goc. thong s(5 dac trims cua pho '-úc xa ham 'a natron ,!.nh ra tren may gia loc elcctr-n .ua B(p
mon Vat iy hat nhan la ca sa dé trien khai cac nghien ciru ca ban va utnii dung tiep theọ Ddi vdi dao tao, két qua ciia de iai se cho phep xay dung mgt só bai thirc tap xac dinh cac dac trung cua phci biic xa ham va natron sinh ra tren mav gia tdc electron tai Bo mdn, gop phdn nang cao chat lugng dao tao ngfinh cong nghe hat nhan tai Trudng Dai hgc Khoa hgc Tu nhien.
1. ẠFacure, R.CFalcao, ẠX.Silva, V.R.Crispim, J.C.Vitoidlị A sUidy of neutron spectra from medical linear accelerators. .Applied Radiation and Isotopes 62(2005)69-72.
2. G.N.Kim, et al. Measurement of photoneutron spectrum at Pohane Neutron Facilitỵ Nucl. Instr. and Meth. A 485 (2002) 458-467.
3. M.Yuly et al. A test of high-energy electron bremsstrahlung calculations. Nucl. Instr. and Meth. A 488 (2002) 262-270.
4. Marshall R.Cleland, Lewis ẠParks. Medium and high-energy electron beam radiation processing equipment for comercial applications. Nucl. Instr. and Meth. B 208 (2003) 74-89.
5. Nguyen Van Do and Pham Due Khuẹ Neutron yields from thick Ta target bombarded by 65 MeV electron beam. Communications in Physics. Communications in Physics. Vol. 14, Nọ 4 (2004), pp.209-214.
6. Nguyen Van Do, T.D.Thiep, P.D.Khue, N.N.Son. Bremsstrahlung ladiation production frx)m 15 MeV electron beam and its applications Proc. of the International Workshop on Particle Beam and Plasma Interaction on Material, ChiangMai, Thailand, Januaiy 31- Febmaiy 1, 2002. pp.39-42. 7. Yuri M.Tsipennyuk. The Microtron development and appbcation. Taylor &
Francis, 2002.
8. Van Do NGUYEN, Due Khue PHAM, Due Thiep TRAN, Van Duan PHUNG. Young Seok LEE, Hee-Seock LEE, Moo-Hyun CHỌ In Soo KO and Won NAMKUNG , ẠK.M. Moinul Haque MEAZE, K DEVAN and Guinyun KIM . Measurement of Neutron and Photon Distributions by Using an Activation Technique at the Pohang Neutron Facilitỵ Toumal of Korean Phvsical Society, Vol. 48. Nọ 3, March 2006. pp. 382-389.
• Ly do chgn de tai :
May gia tdc electron !a thiet bi tao ra eric electron nang lugng t;aọ B.ang each sir dung fiang tac cua cac electron da dugc gia tdc vdi vat chiit co the Iao
ra cac ngudn burc xa ham va notron c6 nang lugng va cudng do idn. Cac qua
trinh vat Iv xav ra khi chiim electron dugc gia tdc ban vao bia ham. Ui rat phiic tap. Co che m.at nang lugng ciia electron, co che sinh biic xa ham va natron
cung nhu dac trung cua cac birc xa nay la nhflng v^n de luon cin dugc lam sang
t6, diic bie: la r vung nang lugng caọ
Cic dac .rimo cua phd nang Immg cung nhu pnin b5 ciia biic \a hanri .a
notron iren c^: ",Ay .gia :dc eieciron khong chi phu 'h':dc \iio nang iirrng cua cnum eiccirun -ai nvi con phii thc-cc ỵiv .-.ii i cu, >>.:•.n livjoc •-:» . :n líc ..UJ. bia hiinv Do í'. Ó^ !chai thac cd hieu qua cạ ngiuin '--K VJ n:'y cwi ;.ha vj., dinh ch:nh x.'. c i : ihong <6 d:u tnmg v(i pn.tn b-' g^^c v-. r.h.,> njng '/r-n^ cu;i
De tai gop phin nang cao trinh dọ boi dudng can bc) chuan bi đi ngu
can bg san sang tham gia tiep nhan co hieu qua "Du an may gia tdc" se dugc trien khai tai Bd mon Vat ly hat nhan. Khoa Vat lỵ Trudng Dai hoc Khoa hoc Tu nhien, DHCXJHN.