Zeynel YALÇIN - Academia.edu (original) (raw)

Papers by Zeynel YALÇIN

Yüzüncü yıl üniversitesi fen bilimleri enstitüsü dergisi, Dec 1, 2008

Özet: Bu çalışmada; asimtotik iterasyon metodunu bir boyutlu VOJZAXİ-Bx* (k-2,3,4) şeklindeki pot... more Özet: Bu çalışmada; asimtotik iterasyon metodunu bir boyutlu VOJZAXİ-Bx* (k-2,3,4) şeklindeki potansiyellerin enerji özdeğerlerini elde etmek amacıyla, ikinci dereceden bazı homojen diferansiyel denklemlere uyguladık. Bazı enerji özdeğerleri elde ettik ve yapılmış diğer bazı hesaplamalarla karşılaştırdık.

International Journal of Quantum Chemistry, 2004

The coupled Schrö dinger equation for three-body atomic systems such as Ps Ϫ (e ϩ e Ϫ e Ϫ), Mu(ϩ ... more The coupled Schrö dinger equation for three-body atomic systems such as Ps Ϫ (e ϩ e Ϫ e Ϫ), Mu(ϩ e Ϫ e Ϫ), p ϩ Ϫ Ϫ , d ϩ Ϫ Ϫ , and t ϩ Ϫ Ϫ is solved by using the hyperspherical harmonic-generalized Laguerre polynomial expansion method (HHGLP). Ground-state eigenenergies are calculated for the certain number of basis functions. The eigenenergies of the first excited states are obtained for both pure Coulomb, V(r, ⍀) ϭ Ẑ (⍀)/r, and Fues-Kratzer-type (FK-type) potential, V(r, ⍀) ϭ Ẑ (⍀)/r ϩ Â (⍀)/r 2. As an example, to illustrate the effect of FK-type interaction on the lowest excited states, the eigenenergies of the Mu Ϫ ion are given together as a function of the certain number of basis functions for both potentials. Our results were compared with the other theoretical calculations. Ground-state eigenenergies of atoms such as X ϩ Y Ϫ Y Ϫ as a function of the reduced mass were investigated. The potential curves of the ground and first excited states of Ps Ϫ (e ϩ e Ϫ e Ϫ), Mu Ϫ (ϩ e Ϫ e Ϫ), p ϩ Ϫ Ϫ systems were obtained by a diagonalization process. It is pointed out that the FK-type potential makes the HH method more useful and more extended for atomic calculations.

Journal of Mathematical Chemistry, Dec 1, 1994

ABSTRACT From the point of view of the theory of differential equations, we present a four-parame... more ABSTRACT From the point of view of the theory of differential equations, we present a four-parameter exactly solvable generalized Poschl-Teller potential, related to the Jacobi polynomials, using the previously unconsidered equations.

International Journal of Quantum Chemistry, 2002

By using the matrix form of the Fues-Kratzer-type (FK) potential, V(r) ϭ Ẑ (⍀)/r ϩ Â /r 2 , three... more By using the matrix form of the Fues-Kratzer-type (FK) potential, V(r) ϭ Ẑ (⍀)/r ϩ Â /r 2 , three-body problems of two-electron atomic systems are solved with the PHGLP expansion method. The atomic wave functions ⌿(⍀) are constructed in terms of generalized Laguarre polynomials (GLP) and potential harmonics (PH). The calculations of the ground-state energies of atoms from He to Si 12ϩ are tabulated using Deng et al.'s procedure and also the effect of the new potential onto excited states of 1 S Li ϩ are illustrated. Then, we calculated excited state energies (n 1 S, n ϭ 1-3) of the atoms from He to Si 12ϩ with the FK potential. The present results are compared with other theoretical calculations. It is pointed out that convergences of our results are more rapid than the results of the pure Coulombic interaction, and, so, this article increases the efficiency of the calculation for atomic three-body systems.

Computational Materials Science, Sep 1, 2013

We have performed an ab initio investigation of structural, elastic, electronic, lattice dynamica... more We have performed an ab initio investigation of structural, elastic, electronic, lattice dynamical, and thermodynamic properties of ScZn and YZn in B2 structure. The calculations was conducted within the density functional theory and linear response theory using the pseudopotentials and a plane wave basis set. The completely minimized structural parameters and elastic constants of ScZn and YZn compounds are in excellent agreement with previous theoretical and experimental data. The calculated phonon dispersion relations for YZn concur very well with experimental data available for main symmetry directions. Through the full quasi harmonic model, in which the phononic effects considered, the thermodynamic properties such as temperature dependence of the isothermal and adiabatic bulk modulus, thermal expansion coefficients, heat capacities, entropy and free energy have been successfully calculated in the whole temperature range from 0 to 1000 K.

International Journal of Quantum Chemistry, 2000

In this article exact solutions of a two-electron Schroedinger equation for the Coulomb potential... more In this article exact solutions of a two-electron Schroedinger equation for the Coulomb potential were extended to the Fues-Kratzer-type potential: ({cflx Z}({Omega})/r) + ({cflx A}/r{sup 2}). The wave function {Psi}(r, {Omega}) is expanded into generalized Laguerre polynomials and hyperspherical harmonics. An analytical expression of two-electron systems is given for matrix elements and accurate energy eigenvalues of the excited state of {sup 1,3}S helium are calculated by using the hyperspherical harmonics method. The present results are compared with previous theoretical calculations and it is concluded that the convergence of energy eigenvalues is faster.

In this article exact solutions of a two-electron Schroedinger equation for the Coulomb potential... more In this article exact solutions of a two-electron Schroedinger equation for the Coulomb potential were extended to the Fues-Kratzer-type potential: ({cflx Z}(Ω)/r) + ({cflx A}/r²). The wave function Ψ(r, Ω) is expanded into generalized Laguerre polynomials and hyperspherical harmonics. An analytical expression of two-electron systems is given for matrix elements and accurate energy eigenvalues of the excited state of {sup 1,3}S helium are calculated by using the hyperspherical harmonics method. The present results are compared with previous theoretical calculations and it is concluded that the convergence of energy eigenvalues is faster.

Nucleation and Atmospheric Aerosols, 2014

ABSTRACT The aim of this study is to conduct quantitative and qualitative analysis of biological ... more ABSTRACT The aim of this study is to conduct quantitative and qualitative analysis of biological and dosimetric materials which contain organic and inorganic materials and to make the determination by using the spectral theorem Beer-Lambert law. Beer-Lambert law is a system of linear equations for the spectral theory. It is possible to solve linear equations with a non-zero coefficient matrix determinant forming linear equations. Characteristic matrix of the linear equation with zero determinant is called point spectrum at the spectral theory.

BioMed Research International, Jan 29, 2014

The effective atomic number and effective electron density in amino acids are of significant inte... more The effective atomic number and effective electron density in amino acids are of significant interest due to their use in various applications. The energy absorption buildup factors, exposure buildup factors, effective atomic numbers, and electron densities of essential amino acids such as Leucine (C 6 H 13 NO 2), Lysine (C 6 H 14 N 2 O 2), Methionine (C 5 H 11 NO 2 S), Phenylalanine (C 9 H 11 NO 2), Threonine (C 4 H 9 NO 3), Tryptophan (C 11 H 12 N 2 O 2), Valine (C 5 H 11 NO 2), Arginine (C 6 H 14 N 4 O 2), and Histidine (C 6 H 9 N 3 O 2) were determined theoretically in the energy range 0.015-15 MeV.

Annals of Nuclear Energy, May 1, 2013

Gamma and X-ray photon interaction parameters such as the equivalent atomic number (Z eq), effect... more Gamma and X-ray photon interaction parameters such as the equivalent atomic number (Z eq), effective atomic number Z eff , and exposure and energy absorption buildup factor have been computed for some boron compounds in the energy range of 15-100 keV. We have used WinXCom and ZXCom software to calculate the effective atomic number from Rayleigh/Compton (R/C) ratios. Finally, the selected boron compounds have been analyzed for application as radiation shielding materials. It is concluded that boric acid (M6) and concentrated colemanite (M1) have better shielding capability among the selected samples.

Vacuum, Nov 1, 2013

ABSTRACT The electrical and optical properties of chalcedony (SiO2) and striped chalcedony are de... more ABSTRACT The electrical and optical properties of chalcedony (SiO2) and striped chalcedony are determined by the impedance and optical absorption spectroscopy techniques. The capacitance, impedance, dissipation factor and the complex dielectric constants are measured by the parallel plate technique in the voltage frequency range 100 to 10 MHz. The dissipation factor is measured as 1.2 and 0.7 for chalcedony and striped chalcedony respectively around 10 kHz. It is found that the striped chalcedony has a major complex broad band with two absorption bands that are centered at 225 and 275 nm. The chalcedony however, has a minor absorption band which is centered at 210 nm.

Annals of Nuclear Energy, Apr 1, 2013

ABSTRACT

Annals of Nuclear Energy, Sep 1, 2012

In this study, the behavior of some photon absorption parameters such as the total mass attenuati... more In this study, the behavior of some photon absorption parameters such as the total mass attenuation coefficients, effective atomic number and electronic density have been investigated for original tincalconite, trommel sieve waste (TSW) and pellet waste (PW). In order to have an adequate understanding of such behavior, we have calculated numerous values pertained to energy related parameters from low energy (1 keV) to high energy (100 MeV) by using WinXCom programme. Radiation shielding of the samples has been compared in terms of Na 2 B 4 O 7 10H 2 O and B 2 O 3 content. The concentrations of Na 2 B 4 O 7 10H 2 O and B 2 O 3 in any materials have been investigated for applications such as environment, construction, radiation shielding and neutron capture. Also, Na 2 B 4 O 7 10H 2 O or any other content may not be a sufficient parameter alone for these applications. Apart from analyses conducted quantitatively, qualitative analyses must be taken into consideration in order to determine the effects of B 2 O 3 or others namely trace compounds.

Nuclear Instruments and Methods in Physics Research, Sep 1, 2012

In this study, the effective atomic number (Z eff)has been calculated for some boron compounds, s... more In this study, the effective atomic number (Z eff)has been calculated for some boron compounds, such as concentrate colemanite, tincal, ulexite, boric acid, probertite and TSW (Trommel Sieve Waste) by means of ZXCOM at incident beam energy (E 0 ¼ 59.543 keV) and scattering angle (y¼ 351). We present and discuss the (Z eff) obtained by Rayleigh/Compton (R/C) ratio and evaluated for the purpose of radiation shielding which contains boron compounds, which are commonly used as shield materials.

High Temperature Materials and Processes, 2015

The Electro-Coagulated Thermal Waste (ECTW) sample of the impedance spectroscopy investigation fo... more The Electro-Coagulated Thermal Waste (ECTW) sample of the impedance spectroscopy investigation for electrical modulus and conductivity are presented. Electrical properties via temperature and frequency dependent impedance spectroscopy were investigated. Real and imaginary parts of electrical modulus were measured at various frequencies and a related Cole-Cole plot was acquired as well. The surface resistivity of the ECTW was measured by the four-point probe measurement technique, yielding a relatively high surface resistivity. As a result of this study, an effective building shielding material, which is a cost effective alternative, is proposed. The activation energy values were calculated from the Arrhenius plots at different frequencies. The transition region in this plot may be attributed to activation of ionic conductivity at lower temperatures.

Physica Scripta, Dec 1, 2009

In this paper, we have studied a new bounded Coulombic potential for the Schrödinger equation wit... more In this paper, we have studied a new bounded Coulombic potential for the Schrödinger equation with the asymptotic iteration method (AIM). We have calculated energy eigenvalues for different potential parameters.

Advances in Condensed Matter Physics, 2014

Pumices have been used in cement, concrete, brick, and ceramic industries as an additive and aggr... more Pumices have been used in cement, concrete, brick, and ceramic industries as an additive and aggregate material. It will be important to study pumice types by using a different tool as EPR which is a new technique for related material to be used for industrial aims. Electron spin resonance (ESR) spectra of the pumice types were taken by EMX-type spectrometer. Also, the current-voltage (I-V) and surface resistivity probe stand of the thin films was studied using a four-point probe measurements. The relationship between radiation shielding properties of the pumice samples and their surface resistivity, chemical, and electrokinetic properties was evaluated using simple regression analysis. Simple regression analysis indicated a strong correlation between surface resistivity and density and SiO 2 , Fe 2 O 3 , CaO, MgO, and TiO 2 content of pumice samples in this study. It is found that a correlation between determined-factor by EPR spectroscopy and radiation shielding is established for pumice samples.

Vacuum, 2014

ABSTRACT The source of electro-coagulation boron waste (ECBW) is wastewater. In order to remove b... more ABSTRACT The source of electro-coagulation boron waste (ECBW) is wastewater. In order to remove boron from wastewater, boron carried to mud in the form of industrial solid waste is rinsed through electro-coagulation method. The dielectric dispersion properties of the ECBW were analyzed determining the parameters such as complex dielectric functions, dissipation factor and surface conductivity. It is found that at lower frequencies, ECBW sample exhibits a high dissipation factor. The Cole–Cole plots of the sample indicate that the dielectric dispersion mechanism is a Debye type. The boron waste exhibits a high resistance material behavior with a value of 1.03 × 109 ohm/sq. and this result is consistent with the electrical behavior of ECBW plate. This study has shown that due to its high resistance and high dielectric dissipation factor, ECBW can be a valuable material for use in many industrial applications which require electrostatic dissipation or electromagnetic shielding.

Physica Scripta, 2009

In this paper, we have studied a new bounded Coulombic potential for the Schrödinger equation wit... more In this paper, we have studied a new bounded Coulombic potential for the Schrödinger equation with the asymptotic iteration method (AIM). We have calculated energy eigenvalues for different potential parameters.

Yüzüncü yıl üniversitesi fen bilimleri enstitüsü dergisi, Dec 1, 2008

Özet: Bu çalışmada; asimtotik iterasyon metodunu bir boyutlu VOJZAXİ-Bx* (k-2,3,4) şeklindeki pot... more Özet: Bu çalışmada; asimtotik iterasyon metodunu bir boyutlu VOJZAXİ-Bx* (k-2,3,4) şeklindeki potansiyellerin enerji özdeğerlerini elde etmek amacıyla, ikinci dereceden bazı homojen diferansiyel denklemlere uyguladık. Bazı enerji özdeğerleri elde ettik ve yapılmış diğer bazı hesaplamalarla karşılaştırdık.

International Journal of Quantum Chemistry, 2004

The coupled Schrö dinger equation for three-body atomic systems such as Ps Ϫ (e ϩ e Ϫ e Ϫ), Mu(ϩ ... more The coupled Schrö dinger equation for three-body atomic systems such as Ps Ϫ (e ϩ e Ϫ e Ϫ), Mu(ϩ e Ϫ e Ϫ), p ϩ Ϫ Ϫ , d ϩ Ϫ Ϫ , and t ϩ Ϫ Ϫ is solved by using the hyperspherical harmonic-generalized Laguerre polynomial expansion method (HHGLP). Ground-state eigenenergies are calculated for the certain number of basis functions. The eigenenergies of the first excited states are obtained for both pure Coulomb, V(r, ⍀) ϭ Ẑ (⍀)/r, and Fues-Kratzer-type (FK-type) potential, V(r, ⍀) ϭ Ẑ (⍀)/r ϩ Â (⍀)/r 2. As an example, to illustrate the effect of FK-type interaction on the lowest excited states, the eigenenergies of the Mu Ϫ ion are given together as a function of the certain number of basis functions for both potentials. Our results were compared with the other theoretical calculations. Ground-state eigenenergies of atoms such as X ϩ Y Ϫ Y Ϫ as a function of the reduced mass were investigated. The potential curves of the ground and first excited states of Ps Ϫ (e ϩ e Ϫ e Ϫ), Mu Ϫ (ϩ e Ϫ e Ϫ), p ϩ Ϫ Ϫ systems were obtained by a diagonalization process. It is pointed out that the FK-type potential makes the HH method more useful and more extended for atomic calculations.

Journal of Mathematical Chemistry, Dec 1, 1994

ABSTRACT From the point of view of the theory of differential equations, we present a four-parame... more ABSTRACT From the point of view of the theory of differential equations, we present a four-parameter exactly solvable generalized Poschl-Teller potential, related to the Jacobi polynomials, using the previously unconsidered equations.

International Journal of Quantum Chemistry, 2002

By using the matrix form of the Fues-Kratzer-type (FK) potential, V(r) ϭ Ẑ (⍀)/r ϩ Â /r 2 , three... more By using the matrix form of the Fues-Kratzer-type (FK) potential, V(r) ϭ Ẑ (⍀)/r ϩ Â /r 2 , three-body problems of two-electron atomic systems are solved with the PHGLP expansion method. The atomic wave functions ⌿(⍀) are constructed in terms of generalized Laguarre polynomials (GLP) and potential harmonics (PH). The calculations of the ground-state energies of atoms from He to Si 12ϩ are tabulated using Deng et al.'s procedure and also the effect of the new potential onto excited states of 1 S Li ϩ are illustrated. Then, we calculated excited state energies (n 1 S, n ϭ 1-3) of the atoms from He to Si 12ϩ with the FK potential. The present results are compared with other theoretical calculations. It is pointed out that convergences of our results are more rapid than the results of the pure Coulombic interaction, and, so, this article increases the efficiency of the calculation for atomic three-body systems.

Computational Materials Science, Sep 1, 2013

We have performed an ab initio investigation of structural, elastic, electronic, lattice dynamica... more We have performed an ab initio investigation of structural, elastic, electronic, lattice dynamical, and thermodynamic properties of ScZn and YZn in B2 structure. The calculations was conducted within the density functional theory and linear response theory using the pseudopotentials and a plane wave basis set. The completely minimized structural parameters and elastic constants of ScZn and YZn compounds are in excellent agreement with previous theoretical and experimental data. The calculated phonon dispersion relations for YZn concur very well with experimental data available for main symmetry directions. Through the full quasi harmonic model, in which the phononic effects considered, the thermodynamic properties such as temperature dependence of the isothermal and adiabatic bulk modulus, thermal expansion coefficients, heat capacities, entropy and free energy have been successfully calculated in the whole temperature range from 0 to 1000 K.

International Journal of Quantum Chemistry, 2000

In this article exact solutions of a two-electron Schroedinger equation for the Coulomb potential... more In this article exact solutions of a two-electron Schroedinger equation for the Coulomb potential were extended to the Fues-Kratzer-type potential: ({cflx Z}({Omega})/r) + ({cflx A}/r{sup 2}). The wave function {Psi}(r, {Omega}) is expanded into generalized Laguerre polynomials and hyperspherical harmonics. An analytical expression of two-electron systems is given for matrix elements and accurate energy eigenvalues of the excited state of {sup 1,3}S helium are calculated by using the hyperspherical harmonics method. The present results are compared with previous theoretical calculations and it is concluded that the convergence of energy eigenvalues is faster.

In this article exact solutions of a two-electron Schroedinger equation for the Coulomb potential... more In this article exact solutions of a two-electron Schroedinger equation for the Coulomb potential were extended to the Fues-Kratzer-type potential: ({cflx Z}(Ω)/r) + ({cflx A}/r²). The wave function Ψ(r, Ω) is expanded into generalized Laguerre polynomials and hyperspherical harmonics. An analytical expression of two-electron systems is given for matrix elements and accurate energy eigenvalues of the excited state of {sup 1,3}S helium are calculated by using the hyperspherical harmonics method. The present results are compared with previous theoretical calculations and it is concluded that the convergence of energy eigenvalues is faster.

Nucleation and Atmospheric Aerosols, 2014

ABSTRACT The aim of this study is to conduct quantitative and qualitative analysis of biological ... more ABSTRACT The aim of this study is to conduct quantitative and qualitative analysis of biological and dosimetric materials which contain organic and inorganic materials and to make the determination by using the spectral theorem Beer-Lambert law. Beer-Lambert law is a system of linear equations for the spectral theory. It is possible to solve linear equations with a non-zero coefficient matrix determinant forming linear equations. Characteristic matrix of the linear equation with zero determinant is called point spectrum at the spectral theory.

BioMed Research International, Jan 29, 2014

The effective atomic number and effective electron density in amino acids are of significant inte... more The effective atomic number and effective electron density in amino acids are of significant interest due to their use in various applications. The energy absorption buildup factors, exposure buildup factors, effective atomic numbers, and electron densities of essential amino acids such as Leucine (C 6 H 13 NO 2), Lysine (C 6 H 14 N 2 O 2), Methionine (C 5 H 11 NO 2 S), Phenylalanine (C 9 H 11 NO 2), Threonine (C 4 H 9 NO 3), Tryptophan (C 11 H 12 N 2 O 2), Valine (C 5 H 11 NO 2), Arginine (C 6 H 14 N 4 O 2), and Histidine (C 6 H 9 N 3 O 2) were determined theoretically in the energy range 0.015-15 MeV.

Annals of Nuclear Energy, May 1, 2013

Gamma and X-ray photon interaction parameters such as the equivalent atomic number (Z eq), effect... more Gamma and X-ray photon interaction parameters such as the equivalent atomic number (Z eq), effective atomic number Z eff , and exposure and energy absorption buildup factor have been computed for some boron compounds in the energy range of 15-100 keV. We have used WinXCom and ZXCom software to calculate the effective atomic number from Rayleigh/Compton (R/C) ratios. Finally, the selected boron compounds have been analyzed for application as radiation shielding materials. It is concluded that boric acid (M6) and concentrated colemanite (M1) have better shielding capability among the selected samples.

Vacuum, Nov 1, 2013

ABSTRACT The electrical and optical properties of chalcedony (SiO2) and striped chalcedony are de... more ABSTRACT The electrical and optical properties of chalcedony (SiO2) and striped chalcedony are determined by the impedance and optical absorption spectroscopy techniques. The capacitance, impedance, dissipation factor and the complex dielectric constants are measured by the parallel plate technique in the voltage frequency range 100 to 10 MHz. The dissipation factor is measured as 1.2 and 0.7 for chalcedony and striped chalcedony respectively around 10 kHz. It is found that the striped chalcedony has a major complex broad band with two absorption bands that are centered at 225 and 275 nm. The chalcedony however, has a minor absorption band which is centered at 210 nm.

Annals of Nuclear Energy, Apr 1, 2013

ABSTRACT

Annals of Nuclear Energy, Sep 1, 2012

In this study, the behavior of some photon absorption parameters such as the total mass attenuati... more In this study, the behavior of some photon absorption parameters such as the total mass attenuation coefficients, effective atomic number and electronic density have been investigated for original tincalconite, trommel sieve waste (TSW) and pellet waste (PW). In order to have an adequate understanding of such behavior, we have calculated numerous values pertained to energy related parameters from low energy (1 keV) to high energy (100 MeV) by using WinXCom programme. Radiation shielding of the samples has been compared in terms of Na 2 B 4 O 7 10H 2 O and B 2 O 3 content. The concentrations of Na 2 B 4 O 7 10H 2 O and B 2 O 3 in any materials have been investigated for applications such as environment, construction, radiation shielding and neutron capture. Also, Na 2 B 4 O 7 10H 2 O or any other content may not be a sufficient parameter alone for these applications. Apart from analyses conducted quantitatively, qualitative analyses must be taken into consideration in order to determine the effects of B 2 O 3 or others namely trace compounds.

Nuclear Instruments and Methods in Physics Research, Sep 1, 2012

In this study, the effective atomic number (Z eff)has been calculated for some boron compounds, s... more In this study, the effective atomic number (Z eff)has been calculated for some boron compounds, such as concentrate colemanite, tincal, ulexite, boric acid, probertite and TSW (Trommel Sieve Waste) by means of ZXCOM at incident beam energy (E 0 ¼ 59.543 keV) and scattering angle (y¼ 351). We present and discuss the (Z eff) obtained by Rayleigh/Compton (R/C) ratio and evaluated for the purpose of radiation shielding which contains boron compounds, which are commonly used as shield materials.

High Temperature Materials and Processes, 2015

The Electro-Coagulated Thermal Waste (ECTW) sample of the impedance spectroscopy investigation fo... more The Electro-Coagulated Thermal Waste (ECTW) sample of the impedance spectroscopy investigation for electrical modulus and conductivity are presented. Electrical properties via temperature and frequency dependent impedance spectroscopy were investigated. Real and imaginary parts of electrical modulus were measured at various frequencies and a related Cole-Cole plot was acquired as well. The surface resistivity of the ECTW was measured by the four-point probe measurement technique, yielding a relatively high surface resistivity. As a result of this study, an effective building shielding material, which is a cost effective alternative, is proposed. The activation energy values were calculated from the Arrhenius plots at different frequencies. The transition region in this plot may be attributed to activation of ionic conductivity at lower temperatures.

Physica Scripta, Dec 1, 2009

In this paper, we have studied a new bounded Coulombic potential for the Schrödinger equation wit... more In this paper, we have studied a new bounded Coulombic potential for the Schrödinger equation with the asymptotic iteration method (AIM). We have calculated energy eigenvalues for different potential parameters.

Advances in Condensed Matter Physics, 2014

Pumices have been used in cement, concrete, brick, and ceramic industries as an additive and aggr... more Pumices have been used in cement, concrete, brick, and ceramic industries as an additive and aggregate material. It will be important to study pumice types by using a different tool as EPR which is a new technique for related material to be used for industrial aims. Electron spin resonance (ESR) spectra of the pumice types were taken by EMX-type spectrometer. Also, the current-voltage (I-V) and surface resistivity probe stand of the thin films was studied using a four-point probe measurements. The relationship between radiation shielding properties of the pumice samples and their surface resistivity, chemical, and electrokinetic properties was evaluated using simple regression analysis. Simple regression analysis indicated a strong correlation between surface resistivity and density and SiO 2 , Fe 2 O 3 , CaO, MgO, and TiO 2 content of pumice samples in this study. It is found that a correlation between determined-factor by EPR spectroscopy and radiation shielding is established for pumice samples.

Vacuum, 2014

ABSTRACT The source of electro-coagulation boron waste (ECBW) is wastewater. In order to remove b... more ABSTRACT The source of electro-coagulation boron waste (ECBW) is wastewater. In order to remove boron from wastewater, boron carried to mud in the form of industrial solid waste is rinsed through electro-coagulation method. The dielectric dispersion properties of the ECBW were analyzed determining the parameters such as complex dielectric functions, dissipation factor and surface conductivity. It is found that at lower frequencies, ECBW sample exhibits a high dissipation factor. The Cole–Cole plots of the sample indicate that the dielectric dispersion mechanism is a Debye type. The boron waste exhibits a high resistance material behavior with a value of 1.03 × 109 ohm/sq. and this result is consistent with the electrical behavior of ECBW plate. This study has shown that due to its high resistance and high dielectric dissipation factor, ECBW can be a valuable material for use in many industrial applications which require electrostatic dissipation or electromagnetic shielding.

Physica Scripta, 2009

In this paper, we have studied a new bounded Coulombic potential for the Schrödinger equation wit... more In this paper, we have studied a new bounded Coulombic potential for the Schrödinger equation with the asymptotic iteration method (AIM). We have calculated energy eigenvalues for different potential parameters.