59,5 keV foton enerjisinde 20≤ Z≤ 68 aralığında değişen elementler için dış manyetik alanda Compton saçılması

Öz

Dış manyetik alanda 21 element için Compton saçılma tesir kesiti ölçümleri 59,54keV foton enerjisi kullanılarak incelendi. Makalede dedektör verimi ve background sayma düzeltmeleri yapılmıştır. Deneysel sonuçlar bazı yaklaşım metodları kullanılarak elde edilen teorik sonuçlarla karşılaştırılmıştır.

Anahtar Kelimeler

• XRS
• saçılma
• tesir-kesiti
• manyetik alan
• Si(Li) dedektör

Compton scattering for elements with 20≤ Z≤ 68 in the external magnetic field

Öz

The incoherent scattering cross-sections of 21 elements have been experimentally investigated for 59,54 keV in external magnetic field. The background corrections and detection efficiency measurements were also made in the article. The experimental results are given and compared with some appropriate theoretical data acquired with some estimated methods.

Anahtar Kelimeler

• XRS
• scattering
• cross-section
• magnetic field
• Si(Li) detector

Kaynakça

1. [1] Klein O, Nishina Y. Über die Streuung von Strahlung durch freie elektronen nach der neuen relativistischen quantendynamik von Dirac. Z. Phys., 1929;52:858-868.
2. [2] Hubbell JH, Veigele WJ, Bringgs EA, Brown RT, Cromer DT, Howerton RJ. Atomic form factors, incoherent scattering functions and photon scattering cross sections. J. Phys. Chem. Ref. Data. 1975;4:471-538.
3. [3] Allawadhi KL, Verma SL, Ghumman BS, Sood BS. Determination of integral Compton-scattering cross sections of 662-keV γ rays from K-shell electrons in intermediate Z elements. Phys. Rev. A. 1978;17(3),1058-1060.
4. [4] Eichler J, de Barros S, Conçalves AM. Compton Cross Section of 662 keV Photons from the K-shell of Co, Cu, Ge, Nb, Mo and Ag. Z. Naturforsch. 1982;37a:1124-1126.
5. [5] Basavaraju G, Kane PP, George, SM. A study of low energy photons resulting from Compton scattering of 279.2 keV gamma rays by K shell electrons. Nucl. Instrum. and Methods in Phys. Res. A. 1987;255(1-2):86-89.
6. [6] Wolff W, Wolff HE, Coelho LFS, de Barros S. Compton scattering of 662-keV photons from K electrons of lead. Phys. Rev. A. 1989;40(8):4378-4382.
7. [7] Saharsha ML, Basavaraju G, Kane PP. Compton scattering of 320-kev y rays by E-shell electrons of holmium and gold. Phys. Rev. A. 1990; 42(3):1267-1274.
8. [8] Simşek Ö., (2000). “Differential cross sections for incoherent scattering of gamma rays by elements”, Phys. Rev. A. 2000;61(042711):1-4.

9. [9] Yalçın P, Kurucu Y, İçelli O, Erzeneoğlu SZ, Şahin Y. Measurement of the incoherent scattering functions. Radiation Physics and Chemistry. 2000; 58:325-329.
10. [10] Scofield JH. Theoretical Photoionization Cross Sections from 1 to 1500 keV. Lawrence Livermore Laboratory (UCRL). 1973; Report No 513626.
11. [11] Hubbell JH, Trehan PN, Singh N, Chand B, Mehta D, Garg ML, et al. A review, bibliography and tabulation of K, L, and higher atomic shell X-ray fluorescence yields. J. Phys. Chem. Ref. Data. 1994; 23:339-364.
12. [12] Hubbell JH, Seltzer, SM. Tables of X-ray attenuation coefficient and mass energy-absorption coefficients 1 keV to 20 MeV for elements Z=1 to 92 and 48 additional substances of dosimetric interest. US Nat. Inst. Standards and Tech. (NISTIR). 1995;5632.
13. [13] Lepy, MC, Depertin K, Janszen H, Schötzing U. L X-ray spectrometry with an Si(Li) detector in the energy range from 10 to 25 keV. PTB Report PTB-Ra-31. 1993;1-39.