Kishori Yadav

Tribhuvan University · Central Department of Physics

This study aims to investigate the differential cross-section (DCS) in a non-monochromatic laser-assisted thermal environment. Building on existing research, which primarily explores electron dynamics and ionization processes without considering thermal effects, this work seeks to bridge this research gap by examining the DCS under non-monochromati...

The objective of this work is to develop a theoretical model, to study the effect of quantum species, activation potential, current density, and temperature on the performance of Pt/C catalysts in Proton Exchange Membrane Fuel Cells (PEMFCs). For this we modified Butler-Volmer equations and analyzing I-V characteristics, the observation shows lower...

This study investigates the phase dynamics of superconducting states in 3D superconductors using the sine-Gordon equation, with a focus on the interplay between the London penetration depth (LPD) and coherence length (). The research employs a combination of analytical modeling and simulation techniques to explore how variations in LPD influence ph...

This study investigates electron-atom scattering within linearly polarized laser field, employing the first-order Born approximation and perturbation theory for target dressing. The Hamiltonian integrates both unbound electron and atomic target in the laser field, with the electron's wavefunctions described by Gordon-Volkov waves. Elastic scatterin...

The magneto-optical properties of atmospheric air molecules describe how air molecules interact with both magnetic fields and light. Studying these properties is crucial for understanding atmospheric dynamics, enhancing remote sensing for environmental monitoring, developing new materials for sensors and optical devices, refining medical imaging te...

Investigating the differential cross section (DCS) during the scattering of important atmospheric gases, including N2, O2, air, Ar, and CO2, over a broad spectrum range from 0.2 μm to 100 μm, is the goal of this work. MATLAB was used to create a computational model that examined the nature of these interactions. Interesting information on the DCS v...

The Josephson penetration depth is an essential characteristic of Josephson junctions, serving a role akin to the London penetration depth in bulk superconductors. It originates from the substantial self-magnetic field generated by a strong Josephson supercurrent, influencing the distribution of the gauge invariant phase difference across the junct...

Laser-assisted thermal electron-hydrogen atom elastic scattering was studied in the first-born approximation. The initial and final states of the projectile electron are described by the modified Volkov wavefunctions known as Volkov-Thermal wavefunctions. The laser-assisted thermal electron with energy ranges from 0.511 MeV to 4 MeV was considered...

This article investigates the performance metrics of two solar mini-grid systems, Thabang Solar Mini-Grid (TSMG) and Sugarkhal Solar Mini-Grid (SSMG), based on secondary live data, collected from Renewable Energy for Rural Livelihood (RERL) and PVsyst software 7.4 spanning the years 2021–2023. Notably, the highest irradiance levels were recorded in...

In this study, we investigate the Klein-Nishina differential cross-section equation for total cross-section and extend it to calculate the total molecular cross-section for compounds Al 2 O 3 , PbO, and Fe 2 O 3. Our findings reveal that the total molecular cross-section of these compounds is significantly larger, with values 5 times greater than t...

The magneto-optical (transmittance, absorbance, and reflectance) characteristics of water and saltwater in the presence of a magnetic field (0T to 0.880T) are investigated in this study. The authors studies Raman spectra shift and a magneto-optical response of water and saltwater in magnetic fields. In the case of water, the transmittance is high i...

The objective of this work is to study the Klein-Nishina (KN) cross section during the collision of free electrons and atoms (H-atom and Pt-atom) near the cathode of Proton Exchange Membrane Fuel Cell (PEMFCs). The developed KN cross section was computed using MATLAB shows KN cross section decrease with an increase with the temperature. The maximum...

The inelastic differential cross-section in the weak laser field increases with increasing the energy of incidence electron and energy gain by target electron in weak laser field. The cross-section disappears (breakpoint) at 5 and 10eV incidence energy in the field with the energy of photon less than the threshold and a similar point also appears a...

We set up the experiment and prepared four electrolytes, each containing 0.10, 0.20, 0.30, and 0.40 g of sodium hydroxide in 400 ml. The experiment was conducted at 5, 10, 15, 20, 25, and 30 V from each of the four different electrolyte concentrations. For each sample, the commutative hydrogen production is notated/measured up to 20 ml, and the tim...

We set up the experiment and prepared four electrolytes, each containing 0.10, 0.20, 0.30, and 0.40 g of sodium hydroxide in 400 ml. The experiment was conducted at 5, 10, 15, 20, 25, and 30 V from each of the four different electrolyte concentrations. For each sample, the commutative hydrogen production is notated/measured up to 20 ml, and the tim...

This work aims to measure the different parameters of Dhunge Dhara water (DDW) such as absorbance, transmittance, mass attenuation coefficient (MAC), and molecular cross section (MCS) and experimentally compare the obtained values with those of pure water (PW) at various temperatures (5 °C to 90 °C) using a theremino spectrometer. Observation shows...

This work presents the study of the thermodynamic properties of thermal electrons participating in scattering events. This is necessary because scattering with a thermal electron in presence of a laser field was not studied yet and it reduces the complexity of event measurement (differential cross-section). To study thermodynamic properties, the au...

To measure the transmittance of drinking water, 2W LED light, Theremion_Spectrometer and diffraction grating are used. The research area is Nisi located inBaglung district, Nepal. The observation is taken 9 sample of drinking water taken from different sources of Nisi. The observation shows that thetransmittance of drinking water taken from Kanabaz...

Semi-classical binary encounter approximation has been used for theoretical calculations of single ionization cross sections of Cu atom at ground state by alpha particle impact in energy range varying from threshold 35 keV/amu to 425 keV/amu. An accurate expression of cross section for energy transfer ΔΕ (σΔΕ) as given by Vriens and quantum mechani...

The objective of this work is to study the photonic force and impulses on a leaf, intensity after passing through the leaf, and molecular cross-section chlorophyll of the leaf. To study we use analytical and computational methods. The observation shows that photonic force and impulse on leaves of crops decrease with wavelength, intensity also decre...

The objective of this work is to calculate the energy eigenvalue for q-deformed Hulthen potential using a Gaussian hypergeometric function with centrifugal approximation factor and related thermodynamical properties. For this, we develop a mathematical model using the Schrodinger wave equation to find the energy eigenvalue. In addition, the thermod...

The mathematical model is developed to investigate the relationship between the Hamiltonian of the Proton Exchange Membrane Fuel Cell (PEMFC) and the output of the PEMFC. At constant response time, the Hamiltonian is directly proportional to current density and cell voltage, according to the established model (Nano-second). At activation overpotent...

SPAST foundation along with Indian Institute of Technology Patna and Indira Gandhi National Tribal University is taking forward the mission of empowering sustainable development goals. Institutions of human learning are important posts for driving the SDGs further. During ICTSGS it was felt by us that a dedicated meeting for encouraging SDGs in ac...

The objective of this work is to study the expectation value of quasiparticle and pair correlation function for quasiparticles for non-equilibrium. The expectation value for creation is found greater than annihilation at zero and non-zero temperature with quasiparticle excitation. For s-wave, d-wave and g-wave the expectation of quasiparticle for c...

The purpose optical properties (transmittance, absorbance, and reflectance) of solidified cubes of water, soybean oil, and saltwater, single and layer wise studies experimentally for water, soybean oil and saltwater. The transmittance properties decrease with an increase in wavelength however the absorbance and reflectance values increase with the...

The objective of this work is to calculate and compare the energy eigen value of Hulthen Potential using the NU method and AIM method. Using these two methods the energy eigenvalue calculated from the NU method is less than 2/δ AIM method. Moreover, the energy eigenvalue calculated from both methods is charge independent and only depends upon the q...

This paper deals with S-matrix, born first approximation, amplitude, and dif-ferential cross-section (DCS), using Volkov function and Taylor series expan-sion in laser field, scattering. Equation ( 30) copes-with DCS and Equation(36) deals with S-matrix, with different parameters, moreover, both equationscontain real and imaginary parts. The DCS in...

The goal of this work is to investigate the total cross section of electrons, atoms, and molecules in iron oxides. On the basis of this total cross section, one can choose the best radiation shielding material of iron oxides in a radiation field ranging from 0MeV to 10MeV. At low energy, the total cross section of electrons, atoms, and molecules is...

The extended conventional Sine-Gordon equation (perturbed and unperturbed) and its solution for superconductor with thickness greater than London penetration depth is the main objective of this work. The extended Sine-Gordon equation contain mixed penetration depth (London and Josephson penetration depth) while conventional has only Josephson penet...

The objective of this work is to select the best chemo-material based on the attenuation coefficient. WinXcom software is used to study the attenuation coefficient of tissue, bone, gold, copper oxygen, water, and mixture. The mixture contains 0.5 fractional weight of gold, 0.3 fractional weight of copper, and 0.2 fractional weight of oxygen. The at...

The advancement of laser technology is causing the research field of optics to become more active, and with the help of advancementof technology, more detailed information can be obtained. The primary goal of this work is to calculate differential cross section by using a mathematical model in presence of coulomb potential and elliptically polarize...

This work aims to study the XRD of 5 Boron oxides crystal with different X-ray sources using Quantum Expresso. When XRD was done with angle vs. intensity, a pretty exciting observation was observed: the single high-intensity peak was observed for each source. The high intensity with large Bragg’s angle is observed with Fe-sources among the consider...

The mass density and energy density of visible photon is calculated as and , respectively. Moreover it is also observed that mass density and energy density of photon depend upon photons mass, wavelength, volume and energy. This is clear from figure 1, figure 2 and literatures. Therefore the mass density and energy density of photon varies with mas...

The mass density and energy density of visible photon is calculated as 10-8 Kgm-3 and 109jm3 respectively. Moreover it is also observed that mass density and energy density of photon depend upon photons mass, wavelength, volume and energy. This is clear from figure 1, figure 2 and literatures. Therefore the mass density and energy density of photon...

The objective of this work is to study and observed the Compton shift of elementary particles masses lies in between 10 ⁻³¹ kg to 10 ⁻²⁷ kg within the angle between 0 radians to 3 radians. The observation shows Compton shifting ranges from 10 ⁻¹¹ m to 0.5 x 10 ⁻¹⁸ m . This nature of shifting is the same for all the considered masses for the same an...

The strength of linear combined short-range potential (Yukawa plus Hulthen) is calculated using two different centrifugal term approximation (equation 2 and equation 3). The calculation shows that the strength of potential calculated using an approximation of equation (3) is greater than equation (2), but the difference between them is negligible....

On studying the Electronic and Atomic Cross sectional area for low atomic masses (Carbon, Aluminum, Iron and Zinc) using Klien-Nishina differential equation. The atomic cross section among these elements for same energy of incidence photon the atomic cross section area found on order of Carbon Aluminum Iron Zinc. This show with increasing atomic nu...

Binary encounter approximation has been used for theoretical calculations of alpha particle (He2+) impact single ionization cross sections of iron atom at ground state in the energy range of 35 to 360 keV/amu. The cross sections for energy transfer given by Vriens’ and quantum mechanical Hartree-Fock velocity distributions for target electron have...

In the present study, we have investigated scattering of an electron by hydrogen atoms in the presence of the elliptical polarized laser field. We have discussed the polarization effect of laser field on hydrogen atom and effect of the resulted polarized potential on differential scattering cross-section is studied. We assume the scattered electrons...

The observed data from the experimental setup, the calculated the cross-section area of 400nm, 620nm, 650nm, and 700nm spectrum of monochromatic wavelength as 0.11322309 × 10 −22 2 , 1.70286251 × 10 −22 2 , 2.50506666 × 10 −22 2 , and 3.26918919 × 10 −22 2 , respectively. This measurement helps to understand and measure the interaction of matter-sp...

Cross-Sectional Area of Single Red photon 6.465066886×10^-23m^2 .

p class="Default">In the present study, we have investigated scattering of an electron by hydrogen atoms in the presence of the Circularly Polarized (CP) laser field. We have discussed the polarization effect of laser field on hydrogen atom and effect of the resulted polarized potential on differential scattering cross section is studied. We assume...