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RISS 인기검색어
- 검색키워드
- 저자 : Ogul Hasan (검색결과 4 건)
- 무료
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Z Boson Production in pp Collisions in the Range of the Center-of-Mass Energy from 7 to 100 TeV
Hasan Ogul 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.73 No.3
High energy physics colliders have been contributing discoveries of and judgments on particles since the early 20th century. One of the well-known high-energy particle colliders is the large hadron collider (LHC), and its proton-proton collision energies have recently been 7, 8 and 13 TeV with the goal of reaching 14 TeV, which is the maximum capacity of the LHC. However, more physics are still to be explored and tested beyond the energy region of the LHC. Therefore, a new collider bigger than the LHC machine, which will be able to collide protons at a 100-TeV center-of-mass energy, is under consideration by the high-energy physics community. To provide insight into the transition from the LHC to the 100-TeV collider, we investigated some properties of the Z process in the collision-energy range from 7 to 100 TeV by using the HERAPDF2.0, MMHT2014, NNPDF3.1 and CT14 next-to-next-to-leading order (NNLO) parton distribution function (PDF) models at NNLO quantum chromodynamics (QCD). The considered properties are the production rate of the Z boson, the change in the uncertainties caused by the collision energy (PDF, renormalization and factorization scales, strong coupling constant, model and parameterization), the forward-backward asymmetry, and the k-factor of the Z boson.
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Detailed k-Factor Studies Using Inclusive Production of W Bosons in pp Collisions
Hasan Ogul 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.72 No.11
The theoretical k-Factor describes the difference between leading and higher order cross sections and its proper usage has a crucial importance for theoretical predictions. In this paper, three different ways are considered to define the k-Factor of W bosons at √ s = 14 TeV in proton-proton collisions. First, we calculate k-Factors using inclusive W± boson leading order (LO), next-toleading order (NLO) and next-to-next-to-leading order (NNLO) quantum chromodynamics (QCD) cross sections with LO, NLO, NNLO parton distribution function (PDF) models, respectively. The second approach used is the calculation of k-Factors based on LO, NLO and NNLO QCD cross sections with the NNLO PDF model. The last method used here is the calculation of k-Factors using the LO QCD cross section with LO, NLO and NNLO PDF models. We further investigated the dependencies of the k-Factor on the renormalization (μR) and the factorization (μF) scales, the strong coupling constant (α s ), the charges of W boson and the collision energy of protons in a range of 7 to 100 TeV.
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Ogul Hasan,Gultekin Batuhan,Bulut Fatih,Us Hakan 한국원자력학회 2024 Nuclear Engineering and Technology Vol.56 No.6
This study focuses on the comparative analysis of ABS polymer samples produced using two distinct manufacturing techniques: 3D printing and the sol-gel methods. In the first approach, ABS polymer was augmented with rare earth oxides, Er2O3 and Gd2O3, in nano powder form and fabricated into test specimens using 3D printing technology. In the second approach, identical samples were prepared via the sol-gel technique involving mold-based fabrication. Elemental content analysis revealed no significant differences between the samples produced by the two methods. The study proceeds to evaluate the gamma-ray shielding, neutron shielding, temperature resistance, and SEM/EDS pictures of ABS samples generated through both techniques. 3D printing method exhibited more favorable results in terms of structure morphology and thermal stability while there is no significant difference for radiation shielding. The results provide insights into the performance and suitability of each production method for radiation shielding applications. This research not only contributes to enhancing radiation shielding technology but also informs the selection of the most appropriate fabrication method for specific applications in nuclear technologies and diagnostic energy range in medical purposes.
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Gultekin Batuhan,Bulut Fatih,Yildiz Hatice,Us Hakan,Ogul Hasan 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.12
Radiation is the main safety issue for almost all nuclear applications, which must be controlled to protect living organisms and the surrounding materials. In this context, radiation shielding materials have been investigated and used in nuclear technologies. The choice of materials depends on the radiation usage area, type, and energy. Polymer materials are preferred in radiation shielding applications due to their superior characteristics such as chemical inertness, resistivity, low weight, flexibility, strength, and low cost. In the presented work, ABS polymer material, which is possibly the most commonly used material in 3D printers, is mixed with Gd2O3 and Er2O3 nanoparticles. ABS filaments containing these rare-earth elements are then produced using a filament extruder. These produced filaments are used in a 3D printer to create shielding samples. Following the production of shielding samples, SEM, EDS, and gamma-ray shielding analyses (including experiments, WinXCOM, GEANT4, and FLUKA) are performed. The results show that 3D printing technology offers significant enhancements in creating homogeneous and well-structured materials that can be effectively used in gamma-ray shielding applications.
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