Abstract: The binding energies, mass spectrum, and constituent masses of single -exotic hypernuclei have been investigated in the framework of quarks’ structure and the non-relativistic Schrödinger equation, with the linear interaction potential describing the electrostatic interaction between the -hyperon and the nucleus core. The ground states of the hypernuclei have been studied in the framework of the oscillator representation method. The obtained results are compared with theoretical and experimental data, showing a good agreement with other values wherever available. This indicates that the interaction between the -hyperon and the nucleus core predicted by the semi-Cornell potential based on the quark-antiquark structure of clusters acts reasonably well. Keywords: Bound states, Constituent mass, Hypernuclei, Schrödinger equation.
{"title":"The Binding Energy and Mass of Λ-Hypernuclei","authors":"","doi":"10.47011/16.3.2","DOIUrl":"https://doi.org/10.47011/16.3.2","url":null,"abstract":"Abstract: The binding energies, mass spectrum, and constituent masses of single -exotic hypernuclei have been investigated in the framework of quarks’ structure and the non-relativistic Schrödinger equation, with the linear interaction potential describing the electrostatic interaction between the -hyperon and the nucleus core. The ground states of the hypernuclei have been studied in the framework of the oscillator representation method. The obtained results are compared with theoretical and experimental data, showing a good agreement with other values wherever available. This indicates that the interaction between the -hyperon and the nucleus core predicted by the semi-Cornell potential based on the quark-antiquark structure of clusters acts reasonably well. Keywords: Bound states, Constituent mass, Hypernuclei, Schrödinger equation.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: The effective atomic number and mass energy absorption coefficient are two essential parameters used to investigate the radiation response of composite materials of dosimetric interest in many medical applications. The effective atomic number of nine selected human tissues and eleven samples of tissue substitute materials were computed using two methods, the interpolation method and the direct method in the energy range used in brachytherapy applications (0.1-2.0) MeV. The applicability of using the effective atomic number values to investigate scatter and absorption properties of some tissue substitutes, against that of the corresponding human tissues, to validate their tissue-equivalency, is examined. The effect of partial interaction cross sections is also explicitly discussed. Further, the absorbed dose rate, for an isotropic point source, in the selected tissue samples was computed using their estimated mass energy absorption coefficient values. The obtained data are analyzed and differences in sample dose rate relative to water, for photon energies of interest, are evaluated. The results indicate that numbers of tissue substitute samples yield estimates of dose rate to within 5% of dose rate of their corresponding human tissues. The obtained results are expected to be useful in improving dose calculation accuracy in brachytherapy treatment planning or dose evaluation after treatment. Keywords: Dosimetry, Human organs and tissues, Tissue equivalent materials, Equivalent atomic number, Attenuation and absorption coefficients.
{"title":"Study of Effective Atomic Number, Mass Energy Absorption Coefficient and Absorbed Dose Rate in Human Organ and Tissue Substitutes","authors":"","doi":"10.47011/16.3.3","DOIUrl":"https://doi.org/10.47011/16.3.3","url":null,"abstract":"Abstract: The effective atomic number and mass energy absorption coefficient are two essential parameters used to investigate the radiation response of composite materials of dosimetric interest in many medical applications. The effective atomic number of nine selected human tissues and eleven samples of tissue substitute materials were computed using two methods, the interpolation method and the direct method in the energy range used in brachytherapy applications (0.1-2.0) MeV. The applicability of using the effective atomic number values to investigate scatter and absorption properties of some tissue substitutes, against that of the corresponding human tissues, to validate their tissue-equivalency, is examined. The effect of partial interaction cross sections is also explicitly discussed. Further, the absorbed dose rate, for an isotropic point source, in the selected tissue samples was computed using their estimated mass energy absorption coefficient values. The obtained data are analyzed and differences in sample dose rate relative to water, for photon energies of interest, are evaluated. The results indicate that numbers of tissue substitute samples yield estimates of dose rate to within 5% of dose rate of their corresponding human tissues. The obtained results are expected to be useful in improving dose calculation accuracy in brachytherapy treatment planning or dose evaluation after treatment. Keywords: Dosimetry, Human organs and tissues, Tissue equivalent materials, Equivalent atomic number, Attenuation and absorption coefficients.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: Atmospheric pressure gliding arc plasma is generated by a 50 Hz (0-13 kV) AC power supply. The electrical properties of the produced plasma are investigated with the help of an oscilloscope. In this work, the relationship between applied voltage, breakdown voltage, and discharge current is studied for air, argon, oxygen, and nitrogen gases. Similarly, the effect of the nature of gases on breakdown voltage and discharge current is studied. The power consumed by the discharge for different gases is obtained by current-voltage characteristics. It is found that among air, nitrogen, argon, and oxygen, argon consumes minimum and nitrogen consumes maximum power. Specifically, at the maximum applied voltage of 10.2 kV, oxygen and nitrogen consume approximately 56-57% more power than argon. Electron density, one of the most essential plasma parameters, is evaluated and compared using an electrical approach for several fading gases. The electron density is found to be increasing with the increase in applied voltage, and the value of electron density is found to be larger in argon discharge. Keywords: Gliding arc discharge, I–V characteristics, Power consumption, Discharge voltage, Electron density.
{"title":"Effect of Working Gas and Applied Voltage on the Estimation of Power and Electron Density in Gliding Arc Discharge (GAD) System","authors":"","doi":"10.47011/16.3.7","DOIUrl":"https://doi.org/10.47011/16.3.7","url":null,"abstract":"Abstract: Atmospheric pressure gliding arc plasma is generated by a 50 Hz (0-13 kV) AC power supply. The electrical properties of the produced plasma are investigated with the help of an oscilloscope. In this work, the relationship between applied voltage, breakdown voltage, and discharge current is studied for air, argon, oxygen, and nitrogen gases. Similarly, the effect of the nature of gases on breakdown voltage and discharge current is studied. The power consumed by the discharge for different gases is obtained by current-voltage characteristics. It is found that among air, nitrogen, argon, and oxygen, argon consumes minimum and nitrogen consumes maximum power. Specifically, at the maximum applied voltage of 10.2 kV, oxygen and nitrogen consume approximately 56-57% more power than argon. Electron density, one of the most essential plasma parameters, is evaluated and compared using an electrical approach for several fading gases. The electron density is found to be increasing with the increase in applied voltage, and the value of electron density is found to be larger in argon discharge. Keywords: Gliding arc discharge, I–V characteristics, Power consumption, Discharge voltage, Electron density.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: The Chemical bath deposition (CBD) technique was successfully used to deposit ZnS thin films. The effects of deposition time and annealing on the structural and optical properties of the obtained thin films were investigated by X-ray diffraction (XRD), and UV-Vis spectrophotometer, respectively. The XRD pattern for the as-deposited ZnS thin films deposited for 30 min showed three peaks at 2θ values of 28.75o, 48.05o, and 56.47o corresponding to (111) (main peak), (220), and (311) reflection planes, indicating cubic structure. Comparing these peaks with that of the films prepared for 60 min, the latter have narrower widths, are more intense, sharper, and produce another weak peak at 2θ angle of 33.51o. Post-annealing treatment results in even more intense and sharper peaks, with their width narrowing further, causing an improvement in the crystallinity. The grains detected from the SEM micrograph are well-defined with spherical shapes of varying sizes. The grain shape changes after annealing due to coalescence of the grains. According to the EDX result, Zn and S were present in the prepared film. The as-deposited films showed a maximum transmittance of 82.1% at the visible region, which increased to 89.2% after annealing. The optical energy band gap was found to be in the ranges of 3.58 - 3.75 eV and 3.41 - 3.73 eV for the as-deposited and annealed films, respectively, signifying that the energy band gap decreases with annealing. Keywords: Chemical bath deposition, Zinc sulphide, Optical properties, Annealing, Thin films, Deposition time.
{"title":"Investigation of the Effect of Deposition Time and Annealing on the Structural and Optical Properties of Chemically Deposited ZnS Thin Films","authors":"","doi":"10.47011/16.3.6","DOIUrl":"https://doi.org/10.47011/16.3.6","url":null,"abstract":"Abstract: The Chemical bath deposition (CBD) technique was successfully used to deposit ZnS thin films. The effects of deposition time and annealing on the structural and optical properties of the obtained thin films were investigated by X-ray diffraction (XRD), and UV-Vis spectrophotometer, respectively. The XRD pattern for the as-deposited ZnS thin films deposited for 30 min showed three peaks at 2θ values of 28.75o, 48.05o, and 56.47o corresponding to (111) (main peak), (220), and (311) reflection planes, indicating cubic structure. Comparing these peaks with that of the films prepared for 60 min, the latter have narrower widths, are more intense, sharper, and produce another weak peak at 2θ angle of 33.51o. Post-annealing treatment results in even more intense and sharper peaks, with their width narrowing further, causing an improvement in the crystallinity. The grains detected from the SEM micrograph are well-defined with spherical shapes of varying sizes. The grain shape changes after annealing due to coalescence of the grains. According to the EDX result, Zn and S were present in the prepared film. The as-deposited films showed a maximum transmittance of 82.1% at the visible region, which increased to 89.2% after annealing. The optical energy band gap was found to be in the ranges of 3.58 - 3.75 eV and 3.41 - 3.73 eV for the as-deposited and annealed films, respectively, signifying that the energy band gap decreases with annealing. Keywords: Chemical bath deposition, Zinc sulphide, Optical properties, Annealing, Thin films, Deposition time.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: Sodium hydroxide and nickel chloride have been used in the effective chemical precipitation process to create nickel oxide (NiO) NPs. We investigate how the morphological, structural, magnetic, and optical characteristics of nanocrystalline NiO are affected by annealing at temperatures of 300, 400, and 500 °C. Field emission scanning electron microscope (FE-SEM), X-ray diffractometer (XRD), vibrating sample magnetometer (VSM), and ultraviolet-visible (UV-vis) spectrophotometer have been utilized in order to characterize NiO-NPs. XRD pattern indicates the material's excellent crystallinity. At the same time, the FESEM study of the synthesized samples reveals that the annealing temperature has a considerable impact on the films' surface morphology. The average crystallite size of NiO samples falls within the range of 29–30.9 nm., whereas the average grain size of synthesized NiO-NPs, as determined by FESEM images, is between 25 and 29.6 nm. We demonstrate that as the annealing temperature rises, grains’ average size increases, but their shape remains spherical. In addition to that, the UV-Vis spectroscopy analysis shows the particles’ significant absorption peak in the UV region. Our investigation reveals that the synthesized samples have direct band gaps. Before annealing, the energy gap measures 2.4 eV; however, by raising the annealing temperature, we were able to attain a broader range of band gap energies for NiO-NPs, with values spanning between 4.05 and 4.95 eV. The created NiO-NPs demonstrate superparamagnetic behavior, which was found in the VSM results examination. Keywords: Nickel oxide nanoparticles, Annealing, Chemical precipitation, Magnetic properties.
{"title":"Annealing Effect on Nickel Oxide Nanoparticles Properties","authors":"","doi":"10.47011/16.3.12","DOIUrl":"https://doi.org/10.47011/16.3.12","url":null,"abstract":"Abstract: Sodium hydroxide and nickel chloride have been used in the effective chemical precipitation process to create nickel oxide (NiO) NPs. We investigate how the morphological, structural, magnetic, and optical characteristics of nanocrystalline NiO are affected by annealing at temperatures of 300, 400, and 500 °C. Field emission scanning electron microscope (FE-SEM), X-ray diffractometer (XRD), vibrating sample magnetometer (VSM), and ultraviolet-visible (UV-vis) spectrophotometer have been utilized in order to characterize NiO-NPs. XRD pattern indicates the material's excellent crystallinity. At the same time, the FESEM study of the synthesized samples reveals that the annealing temperature has a considerable impact on the films' surface morphology. The average crystallite size of NiO samples falls within the range of 29–30.9 nm., whereas the average grain size of synthesized NiO-NPs, as determined by FESEM images, is between 25 and 29.6 nm. We demonstrate that as the annealing temperature rises, grains’ average size increases, but their shape remains spherical. In addition to that, the UV-Vis spectroscopy analysis shows the particles’ significant absorption peak in the UV region. Our investigation reveals that the synthesized samples have direct band gaps. Before annealing, the energy gap measures 2.4 eV; however, by raising the annealing temperature, we were able to attain a broader range of band gap energies for NiO-NPs, with values spanning between 4.05 and 4.95 eV. The created NiO-NPs demonstrate superparamagnetic behavior, which was found in the VSM results examination. Keywords: Nickel oxide nanoparticles, Annealing, Chemical precipitation, Magnetic properties.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: The objective of this model is to examine the Dufour effect on unsteady free convection second-grade fluid flow past an accelerated moving plate subjected to the magnetic field through a porous medium. The thermal radiation and chemical reactions are also taken into account. The constitutive governing equations of the model with all levied initial and boundary conditions are written in non-dimensional form. The non-dimensional equations that govern the flow model are transformed into a time-fractional model using the Caputo, Caputo–Fabrizio, and Atangana–Baleanu time-fractional derivatives. The Laplace transform technique is applied to the differential equations of the flow model to obtain the exact solution for concentration, temperature, and velocity fields. The expression for the Sherwood number, the Nusselt number, and skin friction are also derived analytically. The effects of diffusion-thermo, chemical reactions, second-grade parameterfractional parameter (γ), porosity, magnetic parameter, heat absorption/generation, and thermal radiation on velocity profiles are studied through various figures. It is observed that the velocity profiles for Caputo–Fabrizio fractional derivatives are higher as compared to Caputo and Atangana–Baleanu fractional derivatives. It is also seen that for the value of fractional parameter γ→1, the velocity profiles obtained via Caputo, Caputo–Fabrizo, and Atangana–Baleanu derivatives are identical. Keywords: Second-grade fluid, Free convection, Chemical reaction, Diffusion thermo, Heat generation, Caputo, Caputo–Fabrizio, Atangana–Baleanu fractional derivative.
{"title":"Analytical Solution of Diffusion Thermo Effect on MHD Second Grade Fluid Flow with Heat Generation and Chemical Reaction through an Accelerated Vertical Plate","authors":"","doi":"10.47011/16.3.9","DOIUrl":"https://doi.org/10.47011/16.3.9","url":null,"abstract":"Abstract: The objective of this model is to examine the Dufour effect on unsteady free convection second-grade fluid flow past an accelerated moving plate subjected to the magnetic field through a porous medium. The thermal radiation and chemical reactions are also taken into account. The constitutive governing equations of the model with all levied initial and boundary conditions are written in non-dimensional form. The non-dimensional equations that govern the flow model are transformed into a time-fractional model using the Caputo, Caputo–Fabrizio, and Atangana–Baleanu time-fractional derivatives. The Laplace transform technique is applied to the differential equations of the flow model to obtain the exact solution for concentration, temperature, and velocity fields. The expression for the Sherwood number, the Nusselt number, and skin friction are also derived analytically. The effects of diffusion-thermo, chemical reactions, second-grade parameterfractional parameter (γ), porosity, magnetic parameter, heat absorption/generation, and thermal radiation on velocity profiles are studied through various figures. It is observed that the velocity profiles for Caputo–Fabrizio fractional derivatives are higher as compared to Caputo and Atangana–Baleanu fractional derivatives. It is also seen that for the value of fractional parameter γ→1, the velocity profiles obtained via Caputo, Caputo–Fabrizo, and Atangana–Baleanu derivatives are identical. Keywords: Second-grade fluid, Free convection, Chemical reaction, Diffusion thermo, Heat generation, Caputo, Caputo–Fabrizio, Atangana–Baleanu fractional derivative.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: In this research, we first solve the radial Schrödinger equation analytically using the Nikiforov–Uvarov method with the class of Yukawa potential by replacing the screening parameter with Debye mass and the energy eigenvalues and Then, the corresponding wave functions are obtained in closed form. The obtained energy equation is used to predict the mass spectra of heavy quarkonium systems, namely, charmonium ( ) and bottomonium ( ). Thermal properties such as mean energy, free energy, entropy, and specific heat capacity are also studied. It is found that the presence of Debye mass removes degeneracy in the newly predicted quantum states. Three particular cases are examined, yielding Hellmann potential, inversely quadratic Yukawa potential, and Coulomb potential. The research provides satisfying results in comparison with experimental data and some works in literature with a maximum error of 0.0045 GeV. Keywords: Schrödinger equation, Nikiforov–Uvarov method, Class of Yukawa potential, Heavy quarkonium system, Thermal properties.
{"title":"The Effect of Debye Mass on the Mass Spectra of Heavy Quarkonium System and Its Thermal Properties with Class of Yukawa Potential","authors":"","doi":"10.47011/16.3.8","DOIUrl":"https://doi.org/10.47011/16.3.8","url":null,"abstract":"Abstract: In this research, we first solve the radial Schrödinger equation analytically using the Nikiforov–Uvarov method with the class of Yukawa potential by replacing the screening parameter with Debye mass and the energy eigenvalues and Then, the corresponding wave functions are obtained in closed form. The obtained energy equation is used to predict the mass spectra of heavy quarkonium systems, namely, charmonium ( ) and bottomonium ( ). Thermal properties such as mean energy, free energy, entropy, and specific heat capacity are also studied. It is found that the presence of Debye mass removes degeneracy in the newly predicted quantum states. Three particular cases are examined, yielding Hellmann potential, inversely quadratic Yukawa potential, and Coulomb potential. The research provides satisfying results in comparison with experimental data and some works in literature with a maximum error of 0.0045 GeV. Keywords: Schrödinger equation, Nikiforov–Uvarov method, Class of Yukawa potential, Heavy quarkonium system, Thermal properties.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: In October 2018, the Federal Government of Nigeria established several seismic stations in different places in the country. Three of these stations are located in the Abuja region (the Federal Capital Territory, or FCT) and are managed by the Nigerian Geological Survey Agency. Over the past few years, several low to intermediate earthquakes have been recorded within and around the Abuja region. These occurrences have provided valuable opportunities to study seismic earth noise using the dataset collected from the VolksMeter II seismometer installed at the University of Abuja. The data was processed using the Win QUAKE software to analyze the seismic background noise by identifying its sources. This analysis aimed to examine the seasonal and/or daily noise levels and check the seismometer’s stability through spectral display. The physical examination and/or quantitative observation of the spectrum revealed that there was a distinct area with densely high ranges between 0.08 and 10 s, corresponding to a frequency range of 0.1Hz–12.53Hz. This assessment involved a full Fast Fourier Transform (FFT) calculation. The spectral analysis indicated the presence of noise burbles, primarily attributable to instrumental noise. These noise burbles were prominent in the east-west direction during the months of March, April, May, and June 2019, with frequencies of 0.03Hz, 0.04Hz, 0.03Hz, and 0.03Hz, respectively. A similar pattern was observed in the north-south direction, with noise peaks of 0.07Hz in the months of January, April, and July 2019. The findings from this study of seismic noise amplitude demonstrate a clear correlation with the global seismic noise models. The sources contributing to the station’s noise levels encompass factors such as wind, geological influences, instrumental noise, and human activities including machinery and airport operations as well as vehicular traffic. These observations highlight the potential of using background seismic noise to quantify tremors and monitor their spatial variations, a task that remains difficult with traditional approaches. Keywords: VolksMeter II, Seismic station, Background noise, Spectrum, University of Abuja.
{"title":"Seismic Background Noise Analysis from the Seismic Station Located at the University of Abuja, Northcentral Nigeria","authors":"","doi":"10.47011/16.3.4","DOIUrl":"https://doi.org/10.47011/16.3.4","url":null,"abstract":"Abstract: In October 2018, the Federal Government of Nigeria established several seismic stations in different places in the country. Three of these stations are located in the Abuja region (the Federal Capital Territory, or FCT) and are managed by the Nigerian Geological Survey Agency. Over the past few years, several low to intermediate earthquakes have been recorded within and around the Abuja region. These occurrences have provided valuable opportunities to study seismic earth noise using the dataset collected from the VolksMeter II seismometer installed at the University of Abuja. The data was processed using the Win QUAKE software to analyze the seismic background noise by identifying its sources. This analysis aimed to examine the seasonal and/or daily noise levels and check the seismometer’s stability through spectral display. The physical examination and/or quantitative observation of the spectrum revealed that there was a distinct area with densely high ranges between 0.08 and 10 s, corresponding to a frequency range of 0.1Hz–12.53Hz. This assessment involved a full Fast Fourier Transform (FFT) calculation. The spectral analysis indicated the presence of noise burbles, primarily attributable to instrumental noise. These noise burbles were prominent in the east-west direction during the months of March, April, May, and June 2019, with frequencies of 0.03Hz, 0.04Hz, 0.03Hz, and 0.03Hz, respectively. A similar pattern was observed in the north-south direction, with noise peaks of 0.07Hz in the months of January, April, and July 2019. The findings from this study of seismic noise amplitude demonstrate a clear correlation with the global seismic noise models. The sources contributing to the station’s noise levels encompass factors such as wind, geological influences, instrumental noise, and human activities including machinery and airport operations as well as vehicular traffic. These observations highlight the potential of using background seismic noise to quantify tremors and monitor their spatial variations, a task that remains difficult with traditional approaches. Keywords: VolksMeter II, Seismic station, Background noise, Spectrum, University of Abuja.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: A new far infrared dusty cavity of size 17.4' x 8.6’ at 100 m IRAS (Infrared Astronomical Satellite) map located 0.15o northwest of white dwarf WD0245+541 is investigated. We present dust color temperature, dust mass, and the Planck function distributions in and around the cavity (FIC0248+542). The dust color temperature has been determined to fall within the range of 23.0 to 27.3 (±1.9) K, while the dust mass is found to be 0.8 x 1026 kg. The Planck function distribution along the white dwarf is observed to be non-uniform. Keywords: White Dwarf, Far infrared cavity, Dust color temperature, Planck function, Gaussian distribution.
摘要:研究了位于白矮星WD0245+541西北方向0.15°的100m红外天文卫星(IRAS)地图上一个17.4' x 8.6 '大小的新远红外尘埃空洞。我们给出了尘埃色温，尘埃质量，以及空腔内和周围的普朗克函数分布(FIC0248+542)。尘埃色温在23.0到27.3(±1.9)K之间，尘埃质量为0.8 x 1026 kg。普朗克函数沿白矮星的分布是不均匀的。关键词:白矮星，远红外空腔，尘埃色温，普朗克函数，高斯分布
{"title":"A New Far Infrared Cavity Near White Dwarf WD0245+541","authors":"","doi":"10.47011/16.3.10","DOIUrl":"https://doi.org/10.47011/16.3.10","url":null,"abstract":"Abstract: A new far infrared dusty cavity of size 17.4' x 8.6’ at 100 m IRAS (Infrared Astronomical Satellite) map located 0.15o northwest of white dwarf WD0245+541 is investigated. We present dust color temperature, dust mass, and the Planck function distributions in and around the cavity (FIC0248+542). The dust color temperature has been determined to fall within the range of 23.0 to 27.3 (±1.9) K, while the dust mass is found to be 0.8 x 1026 kg. The Planck function distribution along the white dwarf is observed to be non-uniform. Keywords: White Dwarf, Far infrared cavity, Dust color temperature, Planck function, Gaussian distribution.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: The structural and electronic properties of transition metal dichalcogenides compounds (TMDC) like TiS2 and FeTiS2 are studied in the current paper using density functional theory (DFT). The generalized gradient approximation (GGA) with ultra-soft pseudopotential is used under the Quantum ESPRESSO package. From the theoretical data, it is noted the TiS2 material is a semiconductor in nature with a small indirect band gap. On the other hand, in the doped intercalated compound FeTiS2, which exhibits a metallic nature, the energy bands overlap within the Fermi region. Consequently, FeTiS2 is a ferromagnetic material with spin-up and spin-down characteristics, as also observed from the band structure data. Keywords: Density Functional Theory (DFT), Generalized Gradient Approximation (GGA), Quantum ESPRESSO code, Intercalated compound.
{"title":"Study of Structural and Electronic Properties of TMDC Compounds: A DFT Approach","authors":"","doi":"10.47011/16.3.1","DOIUrl":"https://doi.org/10.47011/16.3.1","url":null,"abstract":"Abstract: The structural and electronic properties of transition metal dichalcogenides compounds (TMDC) like TiS2 and FeTiS2 are studied in the current paper using density functional theory (DFT). The generalized gradient approximation (GGA) with ultra-soft pseudopotential is used under the Quantum ESPRESSO package. From the theoretical data, it is noted the TiS2 material is a semiconductor in nature with a small indirect band gap. On the other hand, in the doped intercalated compound FeTiS2, which exhibits a metallic nature, the energy bands overlap within the Fermi region. Consequently, FeTiS2 is a ferromagnetic material with spin-up and spin-down characteristics, as also observed from the band structure data. Keywords: Density Functional Theory (DFT), Generalized Gradient Approximation (GGA), Quantum ESPRESSO code, Intercalated compound.","PeriodicalId":42562,"journal":{"name":"Jordan Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136035910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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