Browsing by Author "Yurtseven, Hamit"
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Calculation of the inverse relaxation time and the activation energy as a function of temperature for the Raman modes close to the phase transitions in solid nitrogen
Yurtseven, Hamit; Akay, Özge (Elsevier, 2021)The inverse relaxation time is calculated as a function of temperature for the transitions of alpha  beta (P = 0) and epsilondelta(loc)delta (at constant pressures) in the solid N2. For this calculation, the observed ... 
Calculation of the Phase Diagrams For the FluidSolid and SolidSolid (DeltaDelta(Loc)Epsilon) Transitions in Molecular Nitrogen By Using Mean Field Model
Yurtseven, Hamit; Akay, Özge (Editura Acad Romane, 2019)The temperaturepressure (TP) phase diagrams are calculated using the mean field models for the solidfluid (first order) and, the solidsolid transitions of the deltadelta(loc) (second order) and delta(loc)epsilon ... 
Calculation of the Raman and IR frequencies from the volume data at high pressures in N2
Akay, Özge; Yurtseven, Hamit (Elsevier Gmbh, Urban & Fischer Verlag, 2018)Raman and IR frequencies of N2 in the molecular state are calculated as a function of pressure up to 160 GPa by using the volume data from the literature through the mode Gruneisen parameter. By determining the Gruneisen ... 
Calculation of the Raman frequency and linewidth of vibrons using anharmonic self energy model for the epsilon , delta(loc) and delta phases in solid nitrogen
Akay, Özge; Yurtseven, Hamit (Elsevier Gmbh, 2020)Temperature dependences of the Raman frequency shifts and linewidths of vibrons nu(1), nu(2) and nu(22) are calculated from the anharmonic self energy in the epsilon, delta(loc) (localized delta) and delta phases of solid ... 
Calculation of the thermodynamic functions from the Raman frequency shifts close to the epsilon  delta(loc)  delta transitions and Pippard relations in nitrogen
Akay, Özge; Yurtseven, Hamit (World Scientific Publ Co Pte Ltd, 2020)Thermodynamic functions of the thermal expansion (alpha(p)), isothermal compressibility (kappa(T)) and the difference in the heat capacity (Cp  Cv) are calculated as a function of temperature (P = 18 GPa) close to the ... 
Calculation of the Thermodynamic Functions Using A Mean Field Model For the FluidSolid Transition in Nitrogen
Akay, Özge; Yurtseven, Hamit (Editura Acad Romane, 2020)Temperature and pressure dependence of the thermodynamic quantities are calculated using the Landau phenomenological model for the first order fluidsolid transition in nitrogen. This calculation is performed by fitting ... 
Investigation of vibrational, elastic and dielectric properties of cubic gauche nitrogen (cgN)
Akay, Özge; Yurtseven, Hamit (Elsevier GmbH, 2021)Vibrational, elastic and dielectric properties of the cubic gauche nitrogen (cgN) are investigated by analyzing the Raman optic and zonecenter phonon modes using the literature data. From the pressure dependence of those ... 
Liquid(Solid plus Liquid) Transitions in a TwoComponent System of (CH3)CCl3 + CCl4
Yurtseven, Hamit; Akay, Özge (Springer/Plenum Publishers, 2020)Liquid(solid + liquid) transitions are studied in (CH3)CCl3 + CCl4 by using the Landau phenomelogical model. The Gibbs energy is expanded in terms of the orientational disorder (OD) parameters for the transitions of the ...