Nuclear reactions, which are very important from the point of view of human health, may occur during the production of the radiation sources, used in radiotherapy. The nuclear reaction data are needed in the radioisotope production procedure. The total cross section is also important in accelerator technology, in view of radiation protection and safety. In general, the significance of the cross section data for nuclear reactions in radionuclide production programs is firmly established. Gamma irradiation tracers can offer a large amount of information about the anatomy of different organs in the human body. The main purpose of this work was to compare the cross section of longer-shorter lived radionuclides. Theoretical excitation functions have been calculated with TALYS 1.6 nuclear reaction simulation code. The calculated results have been discussed and compared with the experimental data.

The main purpose of this study is the investigation of a cross section of proton induced nuclear reactions. The excitation functions of the reactions: 56Fe(p,2n)55Co 58Fe(p,2n)57Co, 111Cd(p,2n)110In, 112Cd(p,2n)111In, 125Te(p,2n)124I, 126Te(p,2n)125I, 68Zn(p,2n)67Gawere investigated. These reactions were studied as the resulting radioisotopes are used in medical applications. Theoretical excitation functions have been calculated with TALYS 1.6 nuclear reaction simulation code. The calculated excitation functions are compared with the experimental data.

In the nuclear medicine for the positron emission tomography, the injected positron emitter leads to two 511 keV γ-rays. One of the most promising radionuclides is 45 Sc. In this study, the main purpose was to investigate the excitation functions for the reactions 45 Sc (p, x). TALYS 1.6 nuclear reaction simulation code was used for the excitation functions. These calculated excitation functions have been discussed and compared with each other and with Experimental Nuclear Reaction Data Library (EXFOR).

Differential cross sections for elastic scattering of neutrons from 208 Pb target have been calculated with TA-LYS 1.6 nuclear code. Angular distributions were obtained for incident neutron energies of 5 to 96 MeV. The calculated data were compared with experimental results from literature. Calculations for angular distribution of elastic scattering of 208 Pb, made with TALYS 1.6 nuclear code, show good agreement with experimental data.

In general, the deep understanding of proton-induced reactions is a crucial step for the further development of nuclear reactions theory. However there has been an interesting focus in nuclear physics. Some applications require accurate nuclear reaction data of common cross sections and especially need the data of neutron and proton induced energy-angle correlated spectra of secondary particles, as well as double differential cross sections. Double-differential nucleon-production cross-sections of 56 Fe, 63 Cu and 90 Zr targets, bombarded with protons are calculated based on the nuclear theoretical models. Monte Carlo calculations with the TALYS 1.6 nuclear reaction simulation code are performed. Theoretical calculated results are compared with existing experimental data in EXFOR library.

In cases where experimental studies cannot be carried out and there is no experimental data with it, studies carried out with theoretical models shed light on the researchers' knowledge of different data. The most important of this data is the measurable or calculatable influence cross-section value, which is defined as the probability of a reaction occurrence. Examining the possible effects of different models in the calculation of the effect section is important for the correct calculation of this value. The most important data, the cross section of influence, has taken its place in the radioisotope world as well as in many areas of nuclear physics. With developing technology and advancing science, radioisotopes have widespread and diversified uses. Most commonly, radioisotopes are used in medical diagnosis and treatment applications. Among the many radioisotopes used for this purpose, 191-199Au radioisotopes are also important in terms of both their benefits and characteristics in medical applications. In this respect, the study aimed to investigate the effects of different nuclear level density models in production impact cross-section calculations of 191-199Au radioisotopes with deuteron reference. Theoretical cross sections using the TALYS code have been simulated for all isotopes. The results of the calculations obtained were compared with each other and with the experimental data in the literature and it was aimed to determine the most compatible level density models according to the reaction situations examined.

The first 6 years of life are important in the development of children. These years are both the period when development is the fastest in all areas and children acquire basic habits. For this reason, the introduction of individuals to the concept of health from early childhood is an important determinant of their attitudes and behaviors regarding health in their future lives. In this context, our study aimed to evaluate the opinions of children between the ages of 3-6 on the concept of health. The study group of the study consisted of 24 children who attended and did not attend pre-school education in Amasya city center. In the study where the qualitative research method was used, the data were collected with semi-structured interview questions created by the researchers. Content analysis method was used in the analysis of the data. The data were organized and interpreted in categories. The results showed that children's views on the concept of health focused on nutrition at 36-60 months, while children aged 61 months and older were associated with not being sick. It has been observed that the responses of children about what needs to be healthy consist mostly of nutrition-related responses, while health behaviors such as hygiene and exercise are less expressed. Children have been found to frequently associate indicators of health and/or ill-health with symptoms of illness. Similarly, it was found that participants in all age groups expressed the opinion that they would be sick when health was not taken care of. The results were discussed within the framework of the literature and suggestions for supporting children's health behaviors were presented.

In nuclear reactions the usage of high energy gamma particles, as projectiles, has some essential advantages for studying of nuclear structure and reaction mechanisms. In this work, (γ,n)