عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In this article, different types of cyclotron solid targets and their advantages and disadvantages are discussed and a new design is introduced for solid targets of IBA-Cyclone 30 cyclotrons for the first time. In this new targetry, the number and depth of the back grooves for coolant passage were changed. The target material was placed behind an aluminum drawer for bombardment. For this reason the new targetry was named drawer backings. Thus we were able to bombard powders of the target material. These backings have unique capabilities: metallic salts can be bombarded behind the drawer holders and chemical separation may be performed with higher yields and lower costs with respect to other methods. The bombardment may be repeated many times with the same backing. The drawer avoids the presence of contaminant nuclides in the final product.
1. A. D. Nunn, “Techniques for the preparation of thick and thin Arsenic targets suitable for cyclotron irradiation,” Nuclear Instruments and Methods, 251-254 (1972).
2. G. Blessing, S.M. Qaim, “An improved internal Cu3As-alloy cyclotron target for the production of 75Br and 77Br and separation of by-product 67Ga from the matrix activity,”Appl.Radiat.Isot.35(10), 927-931 (1984).
3. F. Helus, “Preparation of carrier-free Bromine-77 for medical use,” Radiochem. Radioanal. Letters, 45-50 (1970).
4. K. X. Nghiem, L. Lakosi, “Isomer activation by bremsstrahlung from a 4 MeV Linac for element analysis,” Journal of Radioanalytical Chemistry.230, 143-147 (1998).
5. I. R. Williams, C. B. Fulmer, “Excitation functions for radioactive isotopes produced below 60 MeV on Al, Fe, and Cu,” Physical Review. 162, 1055-1061 (1967).
6. S. M. Kormali, D. L. Swindle, E. A. Schweikert, “Charged particle activation of medium Z elements II. Proton excitation functions,” Journal of Radioanalytical Chemistry.31, 437-450 (1967).
7. A. Grutter, “Excitation functions for radioactive isotopes produced by protons produced by protons bombardment of Cu and Al in the energy range of 16 to 70 MeV,” Nuclear Physics A. 383, 98-108 (1982).
8. J. F. Ziegler, J. P. Biersack, U. Littmark , “The stopping and range of ions in matter (SRIM Code)”,Version 2000 XX.