Vol. 4 & Issue 4 ; Section C : Physical Sciences

Date : Aug. to Oct.2014

 

Calculation the cross sections and neutron yield for Vanadium (A=51) in 51V (α, n)54Mn reaction

Sameera A.E, Fatima Abd-Al ameir and Noor A. Mohammed

  • Abstract

    In the present work, we are studying the odd nuclide 51V  in 51V (α,n)54Mn nuclear reaction as a function of alpha energy from (13.5MeV to 111MeV). The Q- value, threshold energy, and binding energy are (- 2.2924 MeV), (2.4725MeV), and (445.8174MeV) respectively. The cross section which are published in world libraries (EXFOR, ENDF-B-VI) which are reproduced in fine step(2.5MeV) by using (Matlab-7.7) program, the more recent to select the suitable energies for reaction of ground state.  These cross sections together with the stopping powers calculated from (SIRM 2013) program have been used to calculate the neutron yield for reaction.<span s

A Theoretical Analysis of Magneto Electrodynamics of Antiferromagnetic and Superconducting State Of Low TC Superconductor

Deepak Kumar and L. K. Mishra

  • Abstract

    Using theoretical formalism of M. L. Kulic etal (Physica C (1995)) and T. Ishiguo etal.(J. Supercond. (1994)) we have theoretically analyzed the high frequency magneto electrodynamics behavior of low Tc superconductor DyNi2B2C in thesuperconducting and antiferromagnetic state over wide range of temperature T andmagnetic field H. We have analyzed the T dependence of surface impedance ZS andpenetration depth λ. The establishment of antiferromagnetic order at TN =10.3K result ina marked decrease in the scattering of charge carriers which lead to sharp decrease ofsurface resistance RS and surface reactance XS. Our theoretically analyzed results are in good agreement with the experimental data. 

An Evaluation Real Part of Self-Energy of a Moving Charge near A Metal Insulator Interface

Rajkishor Prasad and L. K. Mishra

  • Abstract

    In this paper, we have evaluated the real part of the self-energy of a moving charge near a metal insulator interface like Al – LiF, Al-KCl and Al-NaCl. We have taken the polarization interaction due to plasmons, optical phonon and excitons. Our result indicates that the real part of self-energy as a function of Z-decreases for Z< 0 and increases for Z > 0. On insulator surface a strong space dependence of the electronic contribution to self-energy of charge has been noticed. This work will help to study the coupling of the electron to the localized electronic excitations in the insulator.

Radon Concentrations Measurement in the Soil of Diwaniyah Governorate-Iraq

Dr. Sawsan Abdul-Hussein, Dr.Fatima Abdel –Alaamer, Yousif Hashim Jaber

  • Abstract

    The aim of this study is to measure the radon (222Ra) concentrations in soil samples taken from regions situated in Diwaniyagovernorate at depth (3) cm.using CR-39 Track detector. The maximum and minimum activity concentration of (222Ra) were (3.7133ppm and .152.1 pap)) at the zones (D3) and (D13) respectively.

Study on Microcontroller Based System to Measure and Control Various Physical Parameter

Sudhakar Singh, M.K. Pathak , P. Mor  and J.M. Keller

  • Abstract

    This paper focuses on the remote monitoring of multiple process variables interfaced through an embedded digital controller. The need of measuring physical parameters plays an important role in science and implementation of microcontroller based remote monitoring systems. The green house based modern agriculture industries are the recent requirement. In this technology, the humidity and temperature of plants are precisely controlled. Microcontroller based embedded system, which could maintain the physical parameters uniform and also could keep the records for analytical studies 

Performance Analysis and Control of 5 MW Permanent Magnet Synchronous Generator Connected to Grid Driven By Wind Turbine Using Autonomous Converters Applying SVPWM Technique 

Samraat Sharma, Subir Dutta and Jyoti Joshi 

  • Abstract

    The Simulation model of DDPMSG 5MW grid Connected are developed using MATLAB 2013(a) and FAST Simulator. In addition to its SVPWM technique has been applied for 5MW grid connected model. Space vector pulse width modulation has been used for obtaining the output voltage with less distortion. The result so obtained show that there is a degree of freedom of space vector placement in a switching cycle. The fully controlled converter has been used to provide separate control for active and reactive powers. The simulation results in MATLAB SIMULINK 2013a showing the model have good dynamic and static performance.

A Theoretical Study of Elementary Excitation in Bose Liquid

Dharmendra Kumar and L. K. Mishra

  • Abstract

    In this paper, we have theoretically studied the elementary excitation in Bose liquid and evaluated the Bogolyubov quasi particle spectrum. Our results were compared with inelastic neutron scattering experiments. Our theoretically evaluated results are in close appearance with hard sphere potential. It was also observed that soft sphere model repulsive potential gives very good agreement between the theoretical quasi particle spectrum and the experimental spectrum of elementary excitations in quantum Bose liquid.

The Electroluminescence (EL) and Photoluminescence (PL) Spectra of Zns: Cu, Cl (Cubic and Hexagonal) Phosphors.

P. K. Srivastava, D. K. Chakraborty, K.K Jain, P.S. Chowdhary

  • Abstract

    The PL spectra and EL spectra of ZnS: Cu, Cl (cubic) and ZnS: Cu, Cl (hexagonal) phosphors have peaks centered at 460, 520, 520 and 460, 520, 513 nm respectively. When the frequency of the applied field is increased, the intensity of both bands increases, but the green band soon shows a saturation effect while the blue band continuous to increase.

Study of effect of ethyl alcohol on electrodeposition of Zinc

Yusuf H. Shaikh, Gazala Shaikh, Pathan J.M., Gulam Rabbani

  • Abstract

    Effect of addition of Ethyl Alcohol on denritic Electrodeposition of Zinc is studied using circular cell geometry. Electrodeposition of Zinc commences at relatively lower cell voltages and the deposits are strongly influence by the presence or organic additives like Ethyl Alcohol and effect is concentration dependent. It is observed that the dendritic growth of electrodeposits is retarded with the addition of ETOH and branches of pattern tend to be thinner and weaker with increase in concentration of ETOH. This results in less crowded branches and the resulting deposits are very fragile with porous structure of the branches. As the dendritic patterns have fewer and thinner branches the fractal dimension are on the lower side. Higher concentration of ETOH result in very thin and fragile branches exhibiting very low fractal dimension. Findings and experimental details are presented.

Self-similarity and Fractal Character in Leaves

 Zakde K. R, Munde S.V, Yusuf H.Shaikh

  • Abstract

    Characterization of irregular shapes is assuming importance because of it applications in areas where conventional approaches have limited or no role. Many naturally occurring objects exhibit self-similarity and scale invariance over certain range of length scale and thus are fractals, however mathematically generated patterns show this character over entire range of length scale. Leafs from most of the trees possess self-similarity and scale invariance over appreciable range of length scale and have fractal character. In the present paper leaves from selected plants are studied from the point of view of fractal character using box-counting technique. The fractal dimension is found from log (N) versus log(r) plot where N is the number of boxes of size ‘r’ required to completely cover the image.  It is found that in most of the cases self-similarity and scale invariance prevails up to four orders of magnitude of length scale confirming fr

Microcontroller Based Data Acquisition System

Surekha V. Munde, Kapsae S.K., Gulam Rabbani3, Shaikh Yusuf H,

  • Abstract

    Design and construction of flexible low cost user friendly data acquisition system (DAS) based on 8051 family microcontroller (89S51/52) is presented. General purpose 8 bit ADC 0809 with 8 analogue inputs is used and thus the resolution is 1 part in 256 which suits most of the experiments, the clock is derived from a simple NE555 circuit. With suitable modifications, more than one channel from the ADC can be used. Basically the DAS is designed for 5V DC input for full scale reading. The DAS works with standard printer port of a PC in SPP mode and thus has downward compatibility.The data acquisition system works under program control and keeps on monitoring the signal at the analogue inputs and makes the digital equivalent available. The data transferred between microcontrollers based DAS and PC is in nibble (4 bit) mode and necessary multiplexing is suitably implemented. PC reads this digital input at pre-decided time intervals through controlling progra

A theoretical study of microwave electrodynamics of Low TC and high TC systems with coexisting superconductivity and magnetism

Deepak Kumar and L. K. Mishra

  • Abstract

    Using theoretical formalism of L. V. Mercalde etal. (Phys. Rev B59 (1999), we have theoretically studied the microwave electrodynamics of low TC and high TC systems with coexisting superconductivity and magnetism. We observed that in the case of Nb/CuMn (superconducting/spin glass) bilayers and on GdBa2Cu3O7-δ (TC=92.5K)(GBCO) thin film there is a coexistence of superconductivity and long range ordered antiferromagnetism below TN=2.5K. We have evaluated microwave surface impedance at three microwave frequencies on GBCO. Our theoretical results show an unusal low temperature behavior of both resistance and reactance on GBCO. This is due to change in magnetic permeability. Our theoretical results are in good agreement with the experimental data and also with other theoretical workers.

Structural, electronic, mechanical and thermodynamic properties of CdS compound

B. Al Shafaay

  • Abstract

    Total-energy calculations of CdS compound using first principle full potential-linearized augmented plane wave (FP-LAPW) plus local orbital method within the density functional theory (DFT). The structural properties at equilibrium are investigated by using the new form of generalized gradient approximations (GGA_PBEsol) that are based on the optimization of total energy. For band structure calculations, both GGA and modified Becke-Johnson (mBJ) of the exchange-correlation energy and potential, respectively, are used.The lattice parameter and mechanical properties of CdS have been determined and we found the energy gap equal 2.66eV.Besides this, a numerical first-principles calculation of the elastic constants was used to calculate C11, C12 and C44. We also presented the thermal effects on some macroscopic properties of this compound using the quasi-harmonic Debye model, in which the lattice vibrations are taken into acco

Theoretical Estimation of Optical Properties of High TC Superconductors

Manjeet Kr. Singh & Lalit Kr. Mishra

  • Abstract

    In this paper using extended Drude model, we have evaluated frequency dependent scattering rate and effective mass of electron for two high Tcsuperconductors at different temperatures. Our theoretically evaluated result for scattering rate is large and effective mass is small in comparison with the experimental data for the given temperatures. However, the trend for both the scattering rate and effective mass are in agreement with the experimental data and also with other theoretical workers. 

An Admitting H-Projective Vector Field in Kaehlerian Spaces with Constant Scalar Curvature

U.S. Negi

  • Abstract

    Ishihara has studied holomorphically projective changes and their groups in a almost complex manifold and also proved on holomorphic planes. Obata has defined and studied Riemannian manifolds admitting a solution of a certain system of differential equations. Also, Negi and Gairola3,4 have explain an admitting a conformal transformation group on Kaehlerian recurrent spaces. In this paper, I have defined and studied an admitting H-projective vector field in Kaehlerian spaces with constant scalar curvature and several theorems have been proved. Also, then find necessary and sufficient conditions for such a Kaehlerian space to be isometric to a complex projective space with Fubini-Study metric.

A theoretical study of one-dimensional Bose-Fermi mixtures and evaluation of its super fluid response and momentum distribution functions

P. K. Verma and L. K. Mishra

  • Abstract

    In this paper, we have theoretically studied one-dimensional Bose-Fermi mixtures using the theoretical formalism of A. Zujev etal (Phys. RevA, 2008). We have evaluated super fluid Bose and Fermi density as a function of Bose-Bose interaction UBB and Bose- Fermi interaction UBF. Our theoretical results show that both ρB s and ρF s decreases with UBB and UBF which are in good agreement with the other theoretical workers. We have also determined momentum distribution for bosons nB(k), fermion distribution nF(k) and anti-correlated pairing momentum na(k) all as a function of wave vector k, keeping UBB, UBF, temperature β constant and varying boson occupation NB from 20 to 36. Our theoretical results indicate that for lower values of NB, nB(k) attains a peak at k=0 where as nF(k) has plateau at k=0. na(k) shows that composite fermions has been formed by pairing a boson and fermion. For large values of NB, Bose- Fermi mixtures show Mott-insulator

On The Cubic Diophantine Equation with Three Unknowns:3(X2+Y2 )-2XY+4 (X+Y+1)=6Z3

S.Divya, M.A.GopalanandS.Vidhyalakshmi

  • Abstract

    The ternary cubic Diophantine equation is analyzed for its infinitely many non-zero distinct integral solutions. A few interesting properties among the solutions are presented.

Suzuki type coupled fixed point theorems In ordered d∗-Metric spaces

K.P.R.Rao and K.V. Siva Parvathi

  • Abstract

    In this paper, we prove a Suzuki-type unique coupled common fixed point theorem in a partially ordered D∗-metric space.

A Study of Continuum theory of Tkachenko modes in rotating Bose-Einstein Condensate

Anant Kumar, and L. K. Mishra

  • Abstract

    Tkachenko mode is a transverse sound wave in a vortex lattice, which exists in the ground state of a rotating super fluid. It has attractive a lot of attention in vortex dynamics of laboratory and astrophysical super fluids. Observation of this extremely soft mode (of order or less than a few Hz) in laboratory super fluids was very difficult because even slight pinning of vortex ends the Tkachenko wave into a classical inertial wave. This mode is a direct manifestation of the quantum vortices since it depends on the circulation quantum. Tkachenko mode in rotating BEC was investigated numerically with solving the equations of Gross-Pitaevskii theory. But the numerical results do not agree with the experiment.In the present paper, we have shown that the continuum theory of Tkachenko modes, taking into account density, inhomogenity and compressibility of the condensate successfully explained the observed experimental data.

A theoretical evaluation of Chemical Potential of Quasi Two Dimensional Condensate

Amrendra Kumar and L. K. Mishra

  • Abstract

    Using hybrid variational model and Gaussian variational model, Chemical Potential  in the unit of hw  for quasi two-dimensional condensate have been evaluated in anisotropic traps. Our results for both models are very similar in magnitude and trends. Our evaluated results are also in good agreement with other theoretical workers.

     

Binding of Vitamin K1 (Phylloquinone) to Human Serum Albumin (HSA): Spectroscopic studies

Musa M Abu Teir, Ph.D, Ola Hourani, Mrs., Saker M. Darwish, Ph.D. and Mahmoud M. Abu-hadid, Ph.D.

  • Abstract

    The interaction of hydrophobic vitamin (vitamin K1) with human serum albumin (HSA) at physiological (pH 6.9- 7.4) has been studied using UV-VIS spectrometer, and an FT-IR spectroscopy. The interaction of hydrophobic vitamin (vitamin K1) with HSA has been investigated by using UV-absorption, and Fourier transforms infrared (FT-IR) spectroscopy. The binding constants of vitamin E and vitamin D have been determined by UV-absorption. The value of the binding constant for vitamin K1 -HSA is calculated at room temperature 293 K and it was determined as (1.21×102M-1) and (6.8×101M-1) for vitamin E- HSA and vitamin D- HSA mixtures, respectively. FT-IR spectroscopy with Fourier self- deconvolution technique and second derivative resolution enhancement procedures were applied in the analysis of the amide I, amid II, and amid III regions to determine the protein secondary structure and hydrophobic vitamins bin

Measurement and characterization of radioactive contaminants in natural and industrial of Diwaniyah Governorate in Iraq, soil samples using ɣ-Ray Spectroscopy

Khalid Hadi Mahdi, Fatima Abdul Amir and Yousif Hashim Jaber

  • Abstract

    The aim of this work was the identification and measurement of concentrations of natural and industrial radionuclides in the soil samples of Al- Diwaniyah governate .thirty-seven samples of surface soil collected selected position that were given its coordinates were given using (G.P.S) .This work done by using (HpGe) detector with efficiency 40% and result (2.2 keV) for energy ( 1332 keV) of the source (60Co). The results as the weight average ware.(24.6266 ±. 01753) Bq/kg , (17.90926±.0140) Bq/kg, 370.9973±.4832) Bq/kg 25.6028±. 01452)  Bq/kg for (214Bi or 214Pb) , (228Ac or 208Tl), (40K), and (137Cs) respectively . This result shown to ordinary level with respect to (UNCERR) denervation for this nuclides.

A theoretical evaluation of condensate size and release of  energy of quasi-two dimensional condensate

Anant Kumar1 and Lalit. Kr. Mishra

  • Abstract

    Using hybrid vibrational model, condensate size (μ m) and release energy ( hw)of quasi-two dimensional condensate for varying trap geometries and atom numbers were calculated. Our theoretically evaluated results are in good agreement with the experimental data and also with others theoretical workers

     

A theoretical evaluation of Structure factor for the s-wave and d-wave pairings in BCS-BEC crossover regime at finite temperature

P. K. Verma and L. K. Mishra

  • Abstract

    In this paper, we have studied the imbalanced d-wave super fluids in the BCS-BEC cross over regime at finite temperature.  The evaluation is performed using theoretical formalism of J. Tempere et al. (2008). We have theoretically evaluated excitation energy of gas of interacting fermions and the structure factor S(q,ω) for s-wave and d-wave scattering keeping scattering potential parameter k0 and k1fixed.  Our theoretically evaluated results are in good agreement with the experimental data and also with the other theoretical workers

Characteristic of NiO thin films prepared by RF-sputtering as CO2 gas sensor

Dr.Kassem Aziz Dr.Mohammed Abdul-Nabi , and Zenab Tarq

  • Abstract

    Nickel oxide (NiO) films of various thicknesses (100,150,200) nm were deposited on glass, Al2O3 and Si wafers. NiO thin films were prepared by RF sputtering depositions technique, NiO was used as target and the sputtering was performed in the presence of Argon as reactive gas. The deposition time varied between (1-2) hours. The films were deposited on heated substrates. The texture of the films was observed using SEM and AFM. The structural and optical properties of the films were characterized by measure (Shimadzu Lab XRD 6000) XRD system and ultraviolet –visible near IR spectrophotometer (UV-Visible-NIR) respectively .The result indicates that NiO thin films take the form of polycrystalline cubic lattice and in particular samples (150, 200) nm show similar average roughness values 4.3 nm and 4.6 nm respectively, while sample 100 nm the average roughness value is 2.625nm. The electrical properties were measured using Hall Effect system. The gas se

Study of Luminescence properties of Tb3+ and Mn2+ doped BaAl12O19 green emitting phosphor for solid state lighting.

V.R.Panse, N.S.Kokode and S. J. Dhoble

  • Abstract

    Here we prepared the Tb3+, Mn2+ activated BaAl12O19 phosphor were synthesized by the combustion synthesis method at 550°C. The prepared phosphor characterized by X-ray diffraction, Scanning electron microscopy, EDX, and photoluminescence measurements. The photoluminescence study of Tb3+ doped phosphor shows that the highest intensity of electric dipole transition (5D4→7F5) at 545 nm (green) under 380 nm excitation. The PL emission spectrum of Mn2+ ion at 340nm excitation 4T1 (4G)-6A1(6S) gives an emission band at 550 nm (green) . The observed photoluminescence measurements of Tb3+ and Mn2+ activated prepared phosphor indicates that these are the outstanding green emitting potential phosphor having suitable application for the solid state lighting.

  • Abstract

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