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Mass formulas for individual black holes in merging binaries
Ozkarsligil, Zeynep Tugce; Tekin, Bayram (2024-03-01)
We give formulas for individual black hole masses in a merger, by using Newtonian physics, in terms of the three measured quantities in the detector: the initial wave frequency f 1, the maximum detected frequency (chirp fr...
Exciton related nonlinear optical properties of a quantum wire
Ustoglu Unal, V.; Tomak, Mehmet; Zorlu, O.; Aksahin, E. (2024-02-15)
A considerable amount of work is done on nonlinear optical properties in quantum wells and dots. However, relatively fewer work is done on both quantum well wires and the excitonic effects. This work analyzes the excitonic...
Nonstationary energy of perfect fluid sources in general relativity
Altas, Emel; Tekin, Bayram (2024-02-15)
The Arnowitt-Deser-Misner (ADM) energy for asymptotically flat spacetimes or its generalizations to asymptotically nonflat spacetimes measure the energy content of a stationary spacetime, such as a single black hole. Such ...
Characterization of linear and nonlinear optical properties of NaBi(WO4)2 crystal by spectroscopic ellipsometry
Isik, M.; Guler, I.; Hasanlı, Nızamı (2024-02-01)
NaBi(WO4)2 compound has been a material of considerable attention in optoelectronic applications. The present research, in which we examined the linear and nonlinear optical properties of NaBi(WO4)2 crystal using the spect...
Kerr-Vaidya type radiating black holes in semiclassical gravity with conformal anomaly
Gürses, Metin; Tekin, Bayram (2024-01-15)
Static black holes in the conformal anomaly-sourced semiclassical general relativity in four dimensions were recently extended to rotating, stationary solutions. These quantum-corrected black holes show different features ...
Growth and optical properties of (Na0.5Bi0.5)(Mo1−xWx)O4 (x = 0.25) single crystal: a potential candidate for optoelectronic devices
Guler, I.; Isik, M.; Hasanlı, Nızamı (2024-01-01)
Double tungstates (DT) and double molybdates (DM) have significant importance because of their optoelectronic applications. Regarding the importance of DT and DM, we investigated experimentally structural and optical prope...
The study of weak decays induced by [Formula presented] transition in light-cone sum rules
Alıyev, Tahmasıb; Bilmiş, Selçuk; Savcı, Mustafa (2023-12-10)
In this study, we analyzed the weak decays induced by [Formula presented] transitions within the light-cone sum rules. Specifically, semileptonic decays of the bottom baryons into the P-wave baryons Λb→Λc(2625)ℓνl and Ξb→Ξ...
A new method to determine the continuous refractive index of an absorbing film by Generalized Stockwell Transform
COŞKUN, EMRE; Emir, Cansu; Selamet, Semanur; Parlak, Mehmet; ÖZDER, SERHAT (2023-12-01)
Generalized Stockwell Transform (GST) was adapted to analyze a transmittance signal to continuously determine the refractive index and extinction coefficient. The process is built by analyzing oscillation frequencies of th...
Description of the multinucleon transfer mechanism for Ca48+Pu244 and Kr86+Pt198 reactions in a quantal transport approach
Arık, Mert; Ayik, S.; Yilmaz, O.; Umar, A. S. (2023-12-01)
Background: Multinucleon transfer (MNT) reactions involving heavy projectile and target combinations stand as a promising method for synthesizing new neutron-rich exotic nuclei, which may not be possible using hot or...
Effect of Surface Pt Doping on the Reactivity of Au(111) Surfaces towards Methanol Dehydrogenation: A First-Principles Density Functional Theory Investigation
Toffoli, Hande; Toffoli, Daniele (2023-12-01)
The surprisingly high catalytic activity of gold has been known to the heterogeneous catalysis community since the mid-1980s. Significant efforts have been directed towards improving the reactivity of these surfaces toward...
Exploring the linear and nonlinear optical behavior of (TlInS2)0.75(TlInSe2)0.25: Insights from ellipsometry measurements
Isik, M.; Guler, I.; Hasanlı, Nızamı (2023-11-15)
The search for layered structured new semiconductor materials with remarkable optical properties has become a driving force, especially for materials science. Tl2In2S3Se [(TlInS2)0.75(TlInSe2)0.25], a fascinating compound,...
Facile synthesis of Ag-coated Au-Ag nanoworms and their shell specific etching for enhanced catalytic activity
Khan, Ghazanfar Ali; Demirtaş, Özge; Bek, Alpan; Ahmed, Waqqar (2023-11-01)
One-dimensional noble-metal nanoparticles (NPs) and their surface modifications to enhance defect states are critical for heterogeneous catalysis. Herein, we report a remarkable enhancement in the catalytic activity of Au-...
Multinucleon transfer mechanism in Gd 160 + W 186 collisions in stochastic mean-field theory
Yılmaz, Osman; Arık, Mert; Erbayri, E.; Umar, A.S. (2023-11-01)
The multinucleon transfer mechanism in Gd160+W186 collisions is investigated in the framework of quantal transport description, based on the stochastic mean-field (SMF) theory. The SMF theory provides a microscopic approac...
Non-Abelian magnetic field and curvature effects on pair production
Kürkcüoğlu, Seçkin; Özcan, Berk; Ünal, Gönül (2023-11-01)
Systematic construction of Kastor-Traschen currents and their extensions to generic powers of curvature
Ozkarsligil, Zeynep Tugce; Tekin, Bayram (2023-10-15)
Kastor and Traschen constructed totally antisymmetric conserved currents that are linear in the Riemann curvature in spacetimes admitting Killing-Yano tensors. The construction does not refer to any field equations and is ...
Temperature-dependent optical properties of TiO2 nanoparticles: a study of band gap evolution
Isik, Mehmet; Delice, Serdar; Hasanlı, Nızamı (2023-10-01)
In this study, we present the first comprehensive investigation of the temperature-dependent band gap energy of anatase TiO2 nanoparticles, utilizing transmission measurements in the range of 10–300 K. X-ray diffraction pa...
Ulexite/HDPE-Bi2O3/HDPE layered composites for neutron and gamma radiation shielding
ALVER, ÜMİT; Duran, Selcen Uzun; Demirköz, Melahat Bilge; Muçogllava, Brunilda; ASLAN, MUSTAFA; ÇAVA, KUTAY; ÖZKALAYCI, FATİH; Dindar, Osman (2023-10-01)
In this study, 5, 10, and 15 wt% ulexite (NaCaB5O6(ΟH)6·5H2O, hydrated sodium calcium borate hydroxide) and 15 wt %Bi2O3 filled high density polyethylene (HDPE) composite materials were fabricated through conventional melt...
A new geometric flow on 3-manifolds: the K-flow
Tasseten, Kezban; Tekin, Bayram (2023-10-01)
We define a new geometric flow, which we shall call the K-flow, on 3-dimensional Riemannian manifolds; and study the behavior of Thurston’s model geometries under this flow both analytically and numerically. As an example,...
Development of proton beam irradiation system for the NA65/DsTau experiment
Aoki, Shigeki; et. al. (2023-10-01)
Tau neutrino is the least studied lepton of the Standard Model (SM). The NA65/DsTau experiment targets to investigate Ds , the parent particle of the ντ , using the nuclear emulsion-based detector and to decrease the syste...
Nanowire geometry effects on devices and transport mechanisms: SnS2/SiNW heterojunction
COŞKUN, EMRE; Emir, Cansu; TERLEMEZOĞLU BİLMİŞ, MAKBULE; Parlak, Mehmet (2023-10-01)
The semiconductor nanowire technology has become essential in developing more complex and efficient devices. In this study, the Si nanowire (SiNW) heterojunction structure with a two-dimensional SnS2 thin film was investig...
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