Table of content

Iraqi Journal of Applied Physics

المجلة العراقية للفيزياء التطبيقية

ISSN: 18132065 23091673
Publisher: iraqi society for alternative and renewable energy sources and techniques
Faculty:
Language: English

This journal is Open Access

About

The Iraqi Journal of Applied Physics (IJAP) is a peer reviewed journal of high quality devoted to the publication of original research papers from applied physics and their broad range of applications. IJAP publishes quality original research papers, comprehensive review articles, survey articles, book reviews, dissertation abstracts in physics and its applications in the broadest sense. It is intended that the journal may act as an interdisciplinary forum for Physics and its applications. Innovative applications and material that brings together diverse areas of Physics are particularly welcome. Review articles in selected areas are published from time to time. It aims to disseminate knowledge; provide a learned reference in the field; and establish channels of communication between academic and research experts, policy makers and executives in industry, commerce and investment institutions. IJAP is a quarterly specialized periodical dedicated to publishing original papers, letters and reviews in: Applied & Nonlinear Optics, Applied Mechanics & Thermodynamics, Digital & Optical Communications, Electronic Materials & Devices, Laser Physics & Applications, Plasma Physics & Applications, Quantum Physics & Spectroscopy, Semiconductors & Optoelectronics, Solid State Physics & Applications, Alternative and Renewable Energy, Computers Networks and Applications.

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Contact info

P. O. Box 55259,
Baghdad 12001,
Iraq
Website: www.iraqiphysicsjournal.com
Email: admin@iraqiphysicsjournal.com
Email: editor_ijap@yahoo.co.uk

Table of content: 2016 volume:12 issue:1

Article
Iraqi Journal of Applied Physics
المجلة العراقية للفيزياء التطبيقية

Authors: Editorial Board
Pages: 1-1
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Abstract

The Iraqi Journal of Applied Physics (IJAP) is a peer reviewed journal of high quality devoted to the publication of original research papers from applied physics and their broad range of applications. IJAP publishes quality original research papers, comprehensive review articles, survey articles, book reviews, dissertation abstracts in physics and its applications in the broadest sense. It is intended that the journal may act as an interdisciplinary forum for Physics and its applications. Innovative applications and material that brings together diverse areas of Physics are particularly welcome. Review articles in selected areas are published from time to time. It aims to disseminate knowledge; provide a learned reference in the field; and establish channels of communication between academic and research experts, policy makers and executives in industry, commerce and investment institutions. IJAP is a quarterly specialized periodical dedicated to publishing original papers, letters and reviews in: Applied & Nonlinear Optics, Applied Mechanics & Thermodynamics, Digital & Optical Communications, Electronic Materials & Devices, Laser Physics & Applications, Plasma Physics & Applications, Quantum Physics & Spectroscopy, Semiconductors & Optoelectronics, Solid State Physics & Applications, Alternative and Renewable Energy, and Computers and Networks.


Article
Instructions for Authors
تعليمات للمؤلفين

Authors: Editorial Board
Pages: 2-2
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Abstract

Contributions to be published in this journal should be original research works, i.e., those not already published or submitted for publication elsewhere, individual papers or letters to editor.


Article
Zinc Oxide Nanowires Prepared by Oblique Angle Deposition Method

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Abstract

This paper presents a detailed study of the oblique deposition effect on the morphology, structure and optical properties of ZnO nanowires (NWs) prepared by the deposition of zinc metallic films on glass substrates at different angles (0, 50 and 70°) and then oxidized in air at 650°C. Highly transparent ZnO thin films were successfully prepared by the oblique angle deposition (OAD) technique on glass substrates at room temperature. Atomic force microscopy (AFM) results show that the sample obliquely deposited presented greater roughness as compared with normally deposited ZnO NWs (Ө=0). Optical measurements showed a sharp absorption edge, near 380 nm, in both normal and oblique films. When the oblique angle increased, the absorption edge of spectra demonstrated a red shift with a direct band gap (3.11eV). Scanning electron microscopy (SEM) results show that the OAD led to the formation of bent columnar ZnO NWs. These NWs were inclined from the substrate normal in a direction opposite to the incident vapor beam. Due to the OAD technique, surface diffusion enhanced the self-shadowing effect. When oblique Zn thin film was later oxidized in air at 650°C for a longer time, the ZnO NWs had a needle-like structure, as was clearly shown by SEM images obtained.


Article
Using Nanoparticles to Combat Arteriosclerosis

Authors: Sarah Vosen
Pages: 10-10
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Abstract

Vascular Repair by Circumferential Cell Therapy Using Magnetic Nanoparticles and Tailored Magnets


Article
Synchronization in Optically Coupled Chaotic Systems by Optical Feedback

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Abstract

An experimentally observations of chaos synchronization have been investigated between two optically coupled laser diodes. Two schemes of optical injection, bidirectional and unidirectional optical injections have been used. One of the two lasers MLD exhibits optical chaos due to external optical feedback by fiber mirror and the other laser diode SLD exhibits optical chaos by optical injection from the first one. The chaotic dynamics of both lasers were a function of laser diodes drive current. Synchronization and Anti-synchronization between two coupled laser diodes have been observed, and ensured by different measurements like time series matching, correlation diagram (phase form) of amplitudes of coupled chaotic signals ,spectrum components coinciding of coupled chaotic signals have been used for both injection schemes. Cross correlation function has been used to measure quality of synchronization in unidirectional injection scheme and it was a function of slave laser diode's current.


Article
Correction Four-Component Dirac-Coulomb Using Gaussian Basis-Set and Gaussian Model Distribution for Super Heavy Element (Z=115)

Authors: Bilal K. Jasim --- Ayad A. Al-Ani --- Saad N. Abood
Pages: 17-21
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Abstract

In this paper, we consider the Dirac-Coulomb equation for many-particles, to describe the interaction between electrons in the system having many electrons. The four-component wave function will expanding into a finite basis-set, using Gaussian basis function technique, in order to describe the upper and lower two components of the 4-spinors, respectively. Gaussian basis-set type dyall.v2z has been adopted to describe the correlation and polarization of 4-component wave function. The small component Gaussian basis functions have been generated from large component Gaussian basis functions using kinetic balance relation. The considered techniques have been applied for super heavy element 115Uup, in which the nuclei has large charge and the inner spinors s1/2 is strongly contracted. To solve the problem resulted from singularity at the origin for the 1s1/2 spinors. We adopting the Gaussian charge distribution model to describe the charge of nuclei. To calculate accurate properties of the atomic levels, we used Dirac-Hartree-Fock method, which have more flexibility through Gaussian basis-set to treat relativistic quantum calculation for system has many-particle.


Article
Making Plasmonic Pixels

Authors: Stewart Wills
Pages: 22-22
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Abstract

A team of scientists in France has created a metasurface on which individual plasmonic nanoantennas act as infrared “pixels,” allowing the surface to encode infrared images of surprising detail. The fabrication technique can encode multiple images on a single metasurface that can be read out by using different settings of polarization and wavelength—a characteristic that the researchers believe could make the metasurfaces useful in applications such as anti-counterfeit devices.


Article
Influence of Complexing Agents on Structural Properties of PbS Thin Films Prepared by CSD Method

Authors: Zoalfakar Almahmoud --- Ibrahim Alghoraibi
Pages: 23-26
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Abstract

In this work, the influences of complexing agents and their molar concentrations on the structural properties of lead sulfide (PbS) nanostructures prepared by chemical solution deposition (CSD) method were studied. Other experimental parameters, such as concentration of reactants, pH of solution and bath temperature, were kept constant during deposition process. The structure of the prepared samples was analyzed by x-ray diffraction (XRD). It was found that the structural form of PbS nanorods is strongly influenced by the complexing agent and its molar concentration as an improvement in the structural quality was observed with changing the concentration of the complexing agent. However, too high concentration of complexing agent could lead to the degradation in the structural quality of the prepared samples.


Article
Optimization and Fine-Tuning of Controlled White-Light Continuum Generation in Transparent Solid Medium by 1-kHz Repetition Rate Femtosecond Laser Pulses

Authors: Tayyab Imran --- Mukhtar Hussain
Pages: 27-30
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Abstract

We report on the generation and optimization of the well-controlled white-light continuum in 1-mm thick sapphire plate by 1-kHz repetition rate 30 fs laser pulses. The white-light continuum generation observed and investigated by using general purpose digital camera and broadband spectrometer. We controlled the incident seed beam power by neutral density filter, variable iris, and focusing lens. Further, we employed two collimating parabolic mirrors and a variable iris to control the collimation of a white-light continuum extended from 400 nm to 1100 nm. The incident seed beam energy and focal position within the optical medium are found critical to stabilizing and controlling the white-light continuum generation. We have investigated and observed the blue-shift in white-light continuum generation at lower incident seed beam power and multi-filamentation at the higher power of the incident beam. The white-light continuum triggering and initializing processes are discussed and reviewed briefly. We have also fine-tuned the white-light continuum generation spectrum by changing the grating separation in the compressor.


Article
Analysis of Boltzmann Equation for SF6 and Some Gas-Mixture Discharges at Critical Field Condition

Authors: Abdulrida S. Hasaani --- Mukhlis M. Ismail
Pages: 31-34
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Abstract

The energy electron distribution function at a particular reduced electric field E/p (where E is the electric field and p is the gas pressure) for SF6+He and SF6+Ar mixtures has been studied. The distribution function has been calculated as a function of percentage mixture ratio (k) ranging from zero (pure SF6) to 100% (for He or Ar) at (E/p)crt. On the other stage, these distribution functions are also studied as a function of (k) at a particular (E/p)crt. under which the breakdown occurs for the same gas mixtures. The (E/p)crt calculation is adopted to explain the discrepancy of the distribution function for gas mixtures. It is also found that the distribution function for gas mixtures at (E/p)crt. and for any value of (k) are identical.


Article
Effects of Temperature and Concentration on Spectroscopic Behaviors of Laser Dye

Authors: Bahaa T. Chiad --- Omar S. Shafeq
Pages: 35-39
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Abstract

In this work, the fluorescence spectra of an organic lasing dye were recorded at different temperatures and doping concentrations. Results showed that when the donor concentration fixed and the acceptor concentrations varies for two temperatures (room and low) and for both solvents (ethanol and methanol) used in this work, the peaks of emission of donor and acceptor show a small blue shift. However, this blue shift increases with increasing the acceptor concentrations against donor concentration.


Article
Thermal Imaging of Single Cells

Authors: Sarah Michaud
Pages: 40-40
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Abstract

A team of researchers from France reports a new method for thermographically imaging individual cells. The imaging technique uses thermography camera technology—also used in night-vision goggles—and brings it down to the micrometer scale to record thermal activity in cells grown on a thin titanium sheet. The researchers say thermal signatures of cells could be useful in cancer diagnostics and would complement data collected using standard histological methods.

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