الفهرس 
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Abstract
Regarding the production of practical radioisotopes and systematic studies of reaction cross-section data, nuclear induced reactions by helium ions (3He and 4He) on natV and by 3He-ions on natSn were studied in this thesis. Irradiations took place at the MGC-20E cyclotron of the Institute for Nuclear Research (ATOMKI), Debrecen, Hungary, utilizing the stacked-foils activation technique. The thesis consists of four chapters in addition to conclusion, appendices and reference parts. The four chapters are described as follows;
• Chapter one (Introduction):
This chapter presents a historical review of nuclear reactions, production of radioisotopes and their production tools. It comprises an outlines of applications of radioisotopes and radiation in different fields especially in medicine. The chapter contains also a brief description of nuclear reaction fundamentals including mechanisms, kinematics, cross-sections and yields in addition to short notes on charged particles interactions within matter. Finally the chapter presents a literature review on the investigated reactions and the aim of their studies.
• Chapter two (Theoretical calculations):
This chapter presents a review on the theoretical nuclear reaction codes EMPIRE, TALYS and ALICE-IPPE, which are used in evaluation of the studied nuclear reactions. The brief description for every code includes the built-in nuclear reaction models arranged for the different nuclear reaction mechanisms and the nuclear data libraries. The chapter comprises the input and output data description besides the evaluation method of every code.
• Chapter three (Experimental techniques):
In this chapter, a brief description of the different experimental tools and techniques, which are used in the study are presented. The chapter includes a short note about the cyclotron and its main parts with special focusing on the ATOMKI MGC-20E cyclotron. It contains an investigation of the technique of cross-section measurement named activation technique. Additional efforts for getting direct reaction cross-sections from cumulative data are also presented. Stacked-foils activation technique, the experimental procedure of activation technique is investigated. The chapter presents also the experimental work and procedure that performed for measuring the residual activity of the different products in different irradiations in addition to characteristics of the utilized measuring tools.
• Chapter four (Results and discussion):
The last chapter consists of three parts. The first one presents evaluation of the excitation functions for alpha induced nuclear reactions on natural vanadium. This part presents comparisons between this work experimental data, literature experimental data and theoretical calculated data from the different nuclear reaction codes for the nuclear reactions 51V(α,n)54Mn and 50V(α,2n)52Mn. In addition, integral yield calculations and focusing on the production routes of 54Mn are presented. In the second part, evaluation of 3He induced nuclear reactions on natural vanadium is presented. Study and comparison between the experimental and theoretical excitation functions of the nuclear reactions natV(3He,xn)52m,g,51Mn, natV(3He,pxn)51Cr, natV(3He,αxn)48V and natV(3He,2α)46Sc are presented. The integral yields of the practically relevant radioisotopes 52gMn and 51Cr are presented and compared with the other production routes. Finally, the last part presents the evaluation of 3He induced nuclear reactions on natural tin. It presents a comparison between the experimental and theoretical excitation functions of the nuclear reactions natSn(3He,2pxn)113g,117mSn, natSn(3He,pxn)115g,117,118m,120m,122g,124gSb and natSn(3He,xn)116g,117g,118g,119g,119m,121g,121m,123mTe. Finally, the integral yields of the product radioisotopes are presented with additional concentration on the production of the PET radionuclide 118gSb.