2019 - Cilt 1 - NSP2018 Özel Sayı
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Öğe Modern instruments for nuclear reaction simulations based on NRV web knowledge base(Alanya Alaaddin Keykubat Üniversitesi, 2019) Denıkın, Andrey S.; Karpov, Alexander Vladimirovich; Naumenko, Mikhail Alekseyevich; Rachkov, Vladimir Alexandrovich; Lekala, L.M.; Mukeru, B.The NRV web knowledgebase on low-energy nuclear physics has been created in the Joint Institute forNuclear Research. This knowledge base working through the Internet integrates alarge amount of digitized experimental data on the properties of nuclei andnuclear reaction cross sections with a wide range of computational programs formodeling of nuclear properties and various processes of nuclear dynamics whichrun directly in the browser of a remote user. Today, the NRV knowledge base isa powerful instrument for nuclear physics research. The basic principles of theNRV knowledge base are covered, and a brief description of its structure isgiven. The practical usage of the NRV knowledge base for both scientific andeducational applications is demonstrated in detail.Öğe Stopping power and range calculations of electrons for some human body tissues(Alanya Alaaddin Keykubat Üniversitesi, 2019) Gümüş, HasanThisstudy presents calculation results of the stopping power and range of electronsof kinetic energy from 20 eV to 10 MeV for some human body tissues. The methodis based on utilization of the modified Bethe-Bloch stopping power expressionand analytical expression for effective atomic electron number and effectivemean excitation energies of target atoms, and for effective charge of incomingelectrons. For this aim, Sugiyama’s semi-empirical formula from Petersen andGreen is embedded in the formula. An analytical expression for the practicalstopping power calculations using Bethe approximation and Thomas-Fermi Model ofatom is taken from the previous study. Thecalculated results of the stopping power and range for electrons in somematerials, such as adipose tissue, bone and water are compared with a number ofother calculation such as the Penelope 14 code and ESTAR results. The presentelectron stopping power and range calculation method should be useful innuclear medicine, radiation treatment, and biomedical dosimetry.Öğe Study of the performance of the FOOT experiment(Alanya Alaaddin Keykubat Üniversitesi, 2019) Dong, YunshengIn the last decade a continuous increase in the numberof cancer patients treated with Particle Therapy (CPT) has been registered. CPTis still a discipline where the contribution coming from research in physicsplays an important role. For example, different studies have shown that inproton therapy nuclear inelastic interactions of the incident beam with thepatient tissues may lead to the fragmentation of the target nuclei producing anon negligible amount of target fragments, which may alter the estimated localdose deposition, especially in the entrance region. On the other hand, in heavyion treatments, the main effect of nuclear inelastic interactions results inthe break up of the incident ion instead of the target nuclei. The producedfragments have a longer range than the projectile, leading to an undesirabledose deposition beyond the Bragg peak. At present there is still a lack ofcomplete and reliable experimental measurements of nuclear reaction crosssections for fragments produced in the interaction with tissues nuclei (H, C,Ca, O, N) of 60-250 MeV protons and 100-400 MeV/u carbon ions, which are thetypical energies adopted in CPT treatments. These data will be important todevelop a new generation of high quality treatment planning systems for CPT. The FOOT (FragmentatiOn Of Target) experiment aims tofill the gap, performing a set of measurements of nuclear fragmentation crosssections relevant for CPT. As far thestudy of target fragmentation is concerned, the FOOT experiment will adopt aninverse kinematic approach to overcome the difficulties related to the shortfragments range (??m). In order to bypass the difficulties to manage apure hydrogen target, it has been chosen a strategy of a double targetseparately made of C and C2H4 and the final cross sectionon Hydrogen will be obtained by subtraction. Further interest in this type ofmeasurements comes from the issue of radioprotection in space missions, wherethe energy to be considered is higher and close to 1 GeV/u. FOOT consists oftwo different setups depending on the detection of heavy and light fragments:the heavy fragments are detected by a high precision tracking system inmagnetic field, a time of flight measurement system and a calorimeter, whilethe lighter ones by a separated emulsion chamber. The optimization and theperformance analysis of the setup have studied by means of the FLUKA(1)(2)(3)Monte Carlo code and different detectors have been tested.In this work, an overview of the FOOT experiment and areport on the study of the detector performances will be presented.Öğe ABAQUS modeling and investigation of nuclear central cooling tower reinforced by CFRP(Alanya Alaaddin Keykubat Üniversitesi, 2019) Dehghanpour, Heydar; Afshari, Faraz; Yılmaz, KemalettinConcrete is recognized as the most ideal material forconstruction of cooling towers. Because it isa relatively durable material to certain chemical environments, gases and high temperatures but, being a brittle material, concrete is damagedwhen subjected to tensile and flexural stresses. Inaddition, tensile and flexural stresses in high structures such as towers arecaused by horizontal loads such as wind loads. Therefore, it is important toexamine the materials used in such serious structures and the repair materialsto be applied after construction. In this study, it is aimed to simulate asuper-large reinforced concrete cooling tower using ABAQUS program as a sheet, by considering previous studies on the structure ofcooling towers. In the models, the strain and stressbehaviors against the wind load were investigated by reinforcing the middlezone of the tower by carbon fiber reinforcedpolymer (CFRP) sheets in different thicknesses.Öğe Correlation between soil gas radon concentrations and terrestrial radioactivity (U-238 and Th-232) in Afyonkarahisar(Alanya Alaaddin Keykubat Üniversitesi, 2019) Yalım, Hüseyin Ali; Gümüş, Ayla; Ünal, RıdvanHumansare exposed both to natural radiation from the radioactive elements that haveexisted in the earth's crust since the formation of the earth and to artificialradiation from medical applications and sparrows after nuclear tests. The mostimportant part in natural radiation affecting human beings is radon derivedfrom terrestrial radioactive elements of Uranium and Thorium. Terrestrialradiation level is strictly related to the contents of Thorium (232Th),Uranium (238U) and Potassium (40K) in rocks which is theorigin of the soil in an area, and to the geological composition of the area.Thedetermination of natural background radiation levels is of great importance forall living things. In order to determine whether the living zone is healthy interms of natural radiation, the concentrations of the radionuclides in thesurrounding environment and the effects of radiation on all the living thingsmust be known. In this study, it was aimed to determine the terrestrialbackground radiation level on the soil surface, and to evaluate the correlationbetween the Uranium and Thorium concentrations and the soil gas radon activityvalues in Afyonkarahisar city center.Öğe Quantal diffusion in heavy-ion collisions(Alanya Alaaddin Keykubat Üniversitesi, 2019) Yılmaz, Osman; Yılmaz, Bülent; Ayık, ŞakirWe investigate the quasi-fission reactions in the basis on theStochastic Mean-Filed (SMF) approach that provides a microscopic and quantaldescription of the multi-nucleon exchange mechanism. In deep-inelastic heavy-ion collisions, collidingions stick and move together for a long time. During this contact time many nucleonsexchange between projectile and target nuclei, and the composite system thenseparate in two main primary fragments without forming a compound nucleus. Quasi-fissionis a non-compound nuclear process in deep-inelastic heavy-ion collisions andthe multi-nucleon exchange mechanism in the quasi-fission reactions isimportant. We calculate the quantal transport coefficients for heavy-ioncollisions at bombarding energies below their fusion barriers and determine theprimary fragment mass distributions. Quantal calculations are compared with theexperimental data.Öğe Assessment of natural radioactivity and radiological risk of sediment samples in Karacaören II dam Lake, Isparta/Turkey(Alanya Alaaddin Keykubat Üniversitesi, 2019) Apaydın, Gökhan; Köksal, Oğuz Kağan; Cengiz, Erhan; Tıraşoğlu, Engin; Baltaş, Hasan; Karabulut, Kazım; Söğüt, ÖmerThis research aimedto assess natural radioactivity levels in lake sediment of Karacaören II Dam.In this study sediment samples were collected from 12 station of lake in May,2016. The natural radionuclides 226Ra, 232Th and 40K were measured with a coaxialHPGe detector (Canberra, GC 1519 model) of 15% relative efficiency and aresolution of 1.9 keV at the 1332 keV gamma of 60Co. In order to assess the radiological hazards resulting from naturalradioactivity, radium equivalent activities (Raeq), absorber dose rate (D), internal (Hin)and external (Hex) hazard index,annual effective dose rate (AED) andExcess life time cancer risk (ELCR)were calculated and compared with recommended values of internationalorganizations.Öğe Investigation of binding energies of hypernuclei(Alanya Alaaddin Keykubat Üniversitesi, 2019) Büyükçizmeci, Nihal; Oğul, RızaIn high energy nuclear reactions one may observethe production of manifold hypernuclei as a result of the capture of hyperons bynuclear residues. We have investigated the statistical disintegration of such hypernuclear systems and its connection to the binding energies of hyperons. Inthe calculations we use the statistical multifragmentationmodel (SMM) adopted for the formation of hypernuclei in the high energy nuclearmultifragmentation reaction events. It was shown within this model that the massdistributions are quite different for the fragments with different strangenesscontents.Öğe Excited doubly heavy baryons spectrum in QCD(Alanya Alaaddin Keykubat Üniversitesi, 2019) Alıev, Takhmasib M.; Bilmis, S.The spectral parameters of J=1/2 doubly heavy baryons (containing b or c quarks)are studied in the framework of the QCD sum rules. Our predictions on the mass andresidues of doubly heavy baryons are compared with the existing ones in the literature.Öğe Determination of the radio-isotope activity concentration in some medicinal and aromatic plants in Bitlis(Alanya Alaaddin Keykubat Üniversitesi, 2019) Şahin Bal, Sultan; Kürşat, Murat; Kuluöztürk, Muhammed Fatih; Karatepe, Şule; Yılmaz, Engin-Öğe Analysis of magnetic field effects on K? and K? XRF spectra of selenide compounds(Alanya Alaaddin Keykubat Üniversitesi, 2019) Çümen, Harun; Hatipoğulları, Merve Meltem; Akkuş, Tuba; Porikli Durdağı, SevilIn this work,EDXRF are used to demonstrate the effect of an applied magnetic field, on thedetermination of energy of X-ray line, full width at half maximum (FWHM),asymmetry index (AI) and intensity ratio values. To this end, various initialmagnetic fields were induced on a selenide compounds, and for each level ofresidual magnetic field, their corresponding K? and K?spectra were collected from a Si(Li) detector. The results showed a strong correlation between the residual samplemagnetic field and the atomic parameters such as energy shifts and asymmetryindices. It was observed that the chemical shift values increases withapplying the sample magnetic field but FWHM values starts decreasing withhigher levels of initial residual magnetic fields.Öğe Isotopic yields in peripheral heavy-ion collisions(Alanya Alaaddin Keykubat Üniversitesi, 2019) Bulut Gülbeyaz, Fatma; Büyükçizmeci, Nihal; Oğul, RızaWe have calculated production cross sections and isotopic distributions of the projectilefragments emerging from the reactions 112,124Sn + 112,124Snat 50 MeV/nucleon incident beam energy, performed at the cyclotron of Michigan State University (MSU). For the interpretation of the data, we carriedout the calculations within the statistical multifragmentation model (SMM). Thepossible modification of symmetry energy parameter, in the multifragmentationregion at the low density freeze-out has been studied. It is shown that a significant reductionof the symmetry energy term is found necessary to reproduce experimental data.The results are in agreement with recent findings.Öğe First forbidden?-Decay logft values of neutron rich te isotopes(Alanya Alaaddin Keykubat Üniversitesi, 2019) Çakmak, Necla; Abdul, MuneemNeutral tellurium detectedin three metal-poor stars enriched by products of r-process nucleosynthesis byusing near-ultraviolet spectra obtained with the Space Telescope ImagingSpectrograph on board the Hubble Space Telescope. Tellurium (Te, Z=52) wasfound at the second r-process peak (A?130) associated with N=82 neutron shellclosure. The beta decay rates of unstable isotopes may be drasticallychanged under stellar conditions. In this work, we have been investigated thefirst forbidden (|?J|=0, 1 and 2) transitions strength of some neutron richTellurium isotopes. The theoretical framework is based on a proton neutronquasiparticle random phase approximation (pn-QRPA) in the particle-hole (ph)channel. The transition probabilities in the Woods-Saxon potential basis havebeen calculated within the x-approximation.The calculated first forbidden b-decay logft valuesare in better agreement with experimental data.Öğe Study of half life measurement and Gamma-Transitions for 44Sc using Photo-Nuclear Reaction(Alanya Alaaddin Keykubat Üniversitesi, 2019) Ishfaq, Mavra; Djapo, Haris; Ertugay, Can; Boztosun, İsmail; Nabi, Jameel-UnAn experiment based on photonuclear reaction was performedto measure half-life and study the gamma-transitionsfor scandium nucleus with bremsstrahlung photons of 18 MeV end point energy,generated by a clinical linear accelerator. These photons were used toirradiate scandium sample. The HPGe detector calibration for before and aftercounting was carried using standard point sources and a volume source. Foranalysis of results and spectrum gf3 and ROOT package was used. As a result ofthis experiment 45Sc(?,n)44Sc gamma-ray energies, associated errors and half-life valueof 44Sc from ground state were calculated and found in agreementwith the published literature values.Öğe Systematic study of the thermal pairing re-entrance in the 72Ti nucleus(Alanya Alaaddin Keykubat Üniversitesi, 2019) Mohamed, Belabbas; Margueron, JérômeFinite-temperatureHartree-Fock-Bogoliubov calculations are performed in 72Ti usingSkyrme interactions, to predict the finite-temperature pairing re-entrancephenomenon for the system of neutrons. It is also shown that pairing re-entrancemodifies the neutron single-particle energies around the Fermi level, as wellas occupation numbers and quasiparticle levels. It is also shown that neutronresonant states are expected to contribute substantially to pairingcorrelations and the two predicted critical temperatures are Tc1=0.1-0.2MeVand Tc2=0.7-0.9 MeV. On theother hand, Our results for the ground-state energies, proton and neutronseparation energies are in very good agreement with experiment where available.Öğe Shell model calculations for some pf shell nuclei(Alanya Alaaddin Keykubat Üniversitesi, 2019) Akkoyun, Serkan; Bayram, Tuncay; Böyükata, MahmutIn this proceeding, the nuclear energy levelsof the some isotopes of Cu and Ga nucleiwere investigated within the nuclearshell model. 56Ni nucleus was considered as inert core for thetheoretical application and pf single particle orbitals on this core were usedas the model space. f5pvh nucleon-nucleon interaction were used for two-bodyeffective interactions. f5/2, p3/2 and p1/2orbitals have been handled as active model space orbitals. KShell shell modelsoftware was used for the calculations. The results have been compared with theexperimental data and they are in good agreement.Öğe Investigation of Degradation Mechanism for dimethyl phthalate (DMP) in aqueous solution by using analytical methods(Alanya Alaaddin Keykubat Üniversitesi, 2019) Mehrnia, Masoomeh; Torun, Murat; Şolpan, DilekOrganic compounds called endocrine disruptorscause health problems by altering the functioning of the endocrine system in ahealthy organism or its future generation. In this study, phthalate acid esters (PAE’s) type of endocrine disruptors were chosen as model compounds and the degradation of dimethylphthalate (DMP) in aqueous solution was investigated under a variety ofreaction conditions using hydrogenperoxide. Inorder to increase the efficiency of degradation of DMP and intermediates whichmay be toxic, H2O2 was used as hydroxyl radical(oxidizing agents) sources in addition to water radiolysis products. To examine the effect of hydrogenperoxide concentration to decompose of DMP, different hydrogen peroxideconcentrations (0.6-4.8 mM) was chosen and as a result of the findings obtainedfrom the comparison of the results, 4.8 mM hydrogen peroxide was determined toprovide the optimum condition for decomposition of 25 mg L-1 DMPsolution. Changes in amounts of the remainsDMP, dissolved oxygen (DO), total acidity, and formaldehyde with irradiationtime were followed. The qualitativeanalysis of the DMP and the intermediates resulted from degradation of DMP wereperformed using a high performance liquid chromatography (HPLC), gaschromatography associated to mass spectrometry (GC–MS) and ion chromatography(IC). The results showed that 99.44% of DMP can be removed during 20min UV radiation time in the presence of 4.8 mM hydrogen peroxide.Öğe Study of nuclear structure for N=50 isotones at Z=28 shell closure(Alanya Alaaddin Keykubat Üniversitesi, 2019) Saifi, Hanane; Benrachi, Fatima; Majeed, F. A.The influence of filling the pfg proton shells on low-lying states structure for neutron-richN=50 isotones have been studied for the nuclei 80Zn, 82Ge,84Se and 86Kr. The shell model calculations have beenperformed in the model space jj45pn, using the effective interaction jj45pnb.Energies of low-lying states, reduced transition probabilities B(E2; Ji® Jf), the quadrupolemoment Q and the deformation parameter are evaluated for studied nuclei, Wecompare the gotten results with available experimental data.Öğe Fragment composition in central heavy-ion collisions(Alanya Alaaddin Keykubat Üniversitesi, 2019) İmal Avcı, Hamide; Büyükçizmeci, Nihal; Oğul, Rıza-Öğe Estimation of measurement uncertainty for 230Th radioisotope analysis in soil(Alanya Alaaddin Keykubat Üniversitesi, 2019) Seferinoğlu, Meryem; Erden, Pınar EsraTheuncertainty of a measurement is the interval of values within which the truevalue is believed to lie with a stated probability when all sources of errorhave been taken into account and is therefore represents the reliability of ameasurement. In this study, we evaluate the measurement uncertainty in the determinationof 230Th in the soil sample using a radiochemical separationprocedure and alpha spectrometry. All the sources in the analysis method thatcontribute to the combined uncertainty were identified. The uncertaintyassociated with a certain parameter was used to determine its partialcontribution to the combined standard uncertainty of the measurand. The spreadsheetand full matematical approach was used to present the combined standarduncertainty.
