Kurşun İzotoplarının Toplam Fotonötron Tesir Kesiti

Öz

Radyasyonun geniş bir uygulama alanı bulunmasına rağmen yüksek dozda alınması sağlık açısından zararlı olduğundan radyasyondan korunma son yıllarda fiziğin önemli bir çalışma konusudur. Radyasyondan korunmada zırh malzemesi seçiminde radyasyonun madde ile etkileşiminin bilinmesi önemlidir. Bu anlamda zırh malzemesi olarak seçilecek malzemenin toplam tesir kesitinin bilinmesi gerekir. Bu çalışmada radyasyon zırhlamasında kullanılan en önemli malzeme olan kurşun ve izotoplarında fotonötron reaksiyon tesir kesitleri hesaplanmıştır. Hesaplamalarda TALYS-1.2 bilgisayar programı kullanılmıştır. Hesaplanan tesir kesitleri ile deneysel (EXFOR) ve değerlendirilmiş (TENDL) tesir kesitleri karşılaştırılmıştır. Hesaplanan tesir kesitleri ile literatürden edilen deneysel ve değerlendirilmiş tesir kesitlerinin birbirleriyle uyumlu olduğu görülmüştür.

Anahtar Kelimeler

• Fotonükleer reaksiyon
• TALYS 1.2 benzetim
• programı

The Total Photoneutron Cross Section of Lead Isotopes

Öz

Taking high doses of radiation, although there are a wide range of applications that are harmful to health, radiation protection is an important study of physics in recent years. The selection of armor material for radiation protection is important to know the interaction of radiation with matter. In this sense, the total cross section of the material to be chosen as the armor material must be known. In this study, photoneutron reaction cross sections are calculated for lead and isotopes that the most important materials used in radiation armored. TALYS 1.2 computer programme is used for calculated cross sections. The calculated cross sections have been compared with the experimental (EXFOR-Experimental Nuclear Reaction Data) and evaluated (TENDL- TALYS based Evaluated Nuclear Data Library) cross sections. It was seen that the agreement between all results, calculated cross section with experimental and evaluated cross sections, are good

Anahtar Kelimeler

• Photonuclear reaction
• TALYS 1.2 simulation
• programme

Kaynakça

1. Akkurt, İ., Kaplan, A., Annand, J.R.M., 2001.
2. Hızlandırıcılarla Photonuclear Reaksiyonlar. I. Ulusal Parçacık Hızlandırıcıları ve Uygulamaları Kongresi, TAEK, Ankara. Belyaev, S.N., O.V. Vasıl’ev, A.B. Kozin, A.A. Nechkin, V.A. Semenov, 1984. The structure of cross sections of (g,n) reaction on Pb-206 and Pb-208 isotopes. Izv.
3. Rossiiskoi Akademii Nauk, Ser. Fiz., Vol.48, Issue. 10, p.1940, Russia.
4. Belyaev, S.N., A.B. Kozin, A.A. Nechkin, V.A. Semenov, S.F. Semenko, 1985. On photoabsorption cross sections of Pr, Bi, and Ta isotopes in the energy region Egamma<12 MeV. Yadernaya Fizika, Vol.42, p.10
5. Beljaev, S.N., V.A. Semenov, 1991. Analysis of the intermediate structure in the (g,n) cross sections on nuclei with N=82. Izv. Rossiiskoi Akademii Nauk, Ser.
6. Fiz., Vol.55, Issue. 5, p.953, Russia. Bell, Z.W., L.S. Cardman, P. Axel, 1982. Fine structure in the Pb-208 photoneutron cross section between 9 and 11.2 MeV. Physical Review, Part C, Nuclear Physic s, Vol.25, p.791, USA.
7. Bezshyyko, O.A., Golinka-Bezshyyko, L.O., Kadenko, I.M., Lymanets, A.O., 2007. Analysis of Characteristics of the Photonuclear Reactions with Charged Particles in Output Channel Using Empıre II and TALYS Codes.
8. Problems of Atomic Science and Technology, Series:Nuclear Physics Investigations (48), p.18-21, N EXFOR/CSISRS (Experimental nuclear reaction data file). Databese Version of October 12, 2009. Brookhaven National

9. Laboratory, National Nuclear Data Center http://www.nndc.bnl.gov/exfor/exfor00.htm. Handbook on photonuclear data for applications, IAEA-TECDOC-1178 (2000).
10. Kaplan, A., Özdoğan, H., Aydın, A., Tel, E., 2012. Photo- neutron Cross Section Calculations of Several
11. Structural Fusion Materials. Journal Fusion Energy. Koning, A. J., Hilaire, S. and Duijvestijn, M., 2009
12. “TALYS 1.2 A Nuclear Reaction Program”, NRG- Nuclear Netherlands. and Research Consultancy Group, Lee, Young-Ouk, Yinlu Han, Jeong-Yeon Lee, and Jonghwa Chanhg, 1999. Evaluation of Photonuclear
13. Data of Mo, Zn, S and Cl for Applications. Journal of the Korean Nuclear Society, Vol.31, Number 6, pp.529-540. Montalbetti, R., L.Katz and J. Goldemberg, 1953.
14. Photoneutron Cross Sections. Physical Review, Vol.91, No.3, 1953.
15. TALYS-based Evaluated Nuclear Data Library database version ftp://ftp.nrg.eu/pub/www/talys/tendl2012/tendl20 of html. January 11, 2013
16. Tel, E., Şahin, H.M., Arasoğlu, A., Aytekin, H., 2006.
17. The investigation of the neutron emission spectra of 232Th and 238U for neutron incident energy from 2 to 18 MeV. Annals of Nuclear Energy 33, 310-324. Türkyılmaz Havva, 2011.Kurşun iyonlarının kesikli adsorpsiyon prosesi ile gideriminin cevap yüzey yöntemiyle optimizasyonu. Yüksek Lisans Tezi,
18. Süleyman Demirel Üniversitesi, Çevre Mühendisliği. Varlamov, V.V., N.G. Efimkin, B.S. Ishkhanov, V.V. Sapunenko, 1993. The evaluation of the photonuclear reaction cross sections using the method of reduction at significant systematic uncertainties.
19. Vop. At. Nauki Tekhn., Ser. Yadernye Konstanty, Vol., Issue.1, p.52, Russia. Varlamov, V.V., and B.S.Ishkhanov, 2002. Study of consistency between (γ,xn), [(γ,n)+(γ,np)] and (γ,2n) reaction cross sections using data systematics.
20. INTERNATIONAL ATOMIC ENERGY AGENCY. Vyver, R. Van de., J. Devos, H. Ferdinande, R. Carchon, E. Van Camp, 1978. Fine structure in the Pb-208(g,n) cross section. Zeitschrift fuer Physik A, Hadrons and Nuclei, Vol. 284, p.91, Germany.