JJP » JJP Issues
 Jordanian Journals
Editorial Board
International Advisory Board
Manuscript Organization
Instructions to Authors
Publication Ethics  
JJP Issues  
Contact Address


Volume 10, No. 3, 2017, 1438 H



Reflectance Enhancement Factor Associated with Coherent Interference of Light in an Unbacked or Embedded Quarter-Wave Layer

If a semi-infinite transparent substrate is replaced by a quarter-wave layer (QWL) of the same material, which is embedded in the same ambient, the intensity reflectance is increased by a significant factor. A simple expression is derived for this reflectance enhancement factor (REF) that results from coherent multiple-beam interference of monochromatic light within the QWL. The REF is a monotonically decreasing function of the Fresnel intensity reflectance at the ambient-layer interface with maximum and minimum values of 4 and 1, respectively. The expression for is applicable for the p and s linear polarizations, at any angle of incidence and for any wavelength within the common transparency bandwidth of both layer and ambient. ...


R. M. A. Azzam

JJP, 2017, 10(3) ,  113-116


 English Articles



Estimation of Natural and Anthropogenic Exposures to Gamma Ray from a High Agricultural Area in Jordan "Bani-Kananah District"

The activity concentrations of some artificial and natural radionuclides in some soil samples from high agricultural area, in North West Jordan “Bani-Kananah District”, were measured by using gamma ray spectrometry. The activity concentrations of 137Cs (Cesium), 40K (Potassium), 238U (Uranium) and 232Th (Thorium) were measured in 38 soil samples which were collected from agricultural area. The radiation hazard indices of soil samples were also calculated. The results showed that the average values of either radionuclides activity concentrations or radiation hazard indices of all soil samples under study were in the internationally allowable and lower range. ...


H. S. Hamadneh,

M. M. Eyadeh,

M. J. Abdallah and O. A. Al-Khdirat

JJP, 2017, 10(3) ,  117-125

Semi-Quantitative Analysis for Pottery Fragments Excavated at Udhruh Site, Jordan Using Non-destructive SR-XRF Analysis Employing Multivariate Statistical Methods

This paper presents a multielement analysis of fifteen Ayyubid-Mamluk glazed pottery sherds for determining the chemical composition in order to study their provenance. The tested fragments in this work belong to the historical site of Udhruh in southern Jordan. The chemical analysis for samples has been carried out by using Synchrotron Radiation X-ray Fluorescence Spectrometry (SR-XRF) technique. The semi-quantitative analysis of the elements Fe, Cu, Zn, Br, Rb, Sr, Y, Zr, Nb, Mo, Pd, Ag, Cd and Pb has been applied to the samples using SR-XRF technique. The data were analyzed by using Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA) in order to define groups of different glazed pottery sherds by obtaining information about their similarity and clustering. ...


K. AbuSaleem,

A. Aldrabee,

A. Wriekat,

M. Tarawneh and
F. Abudanah

JJP, 2017, 10(3) , 127-137

Assessment of Indoor Radon Levels in Selected Locations within Lagos State University, Ojo, Lagos

An indoor radon measurement survey was carried out in eleven offices in the campus of Lagos State University, Ojo, Nigeria using Pro series 3, radon gas detector model HS71512. The main objective of this survey was to estimate radiation doses received by the dwellers of these offices due to indoor radon exposure. For this research, radon detectors were suspended, where the ventilation slits will not be blocked at least 1.2m above the floor, a height in the breathing zone of a seated person, for 48 hours. The values of indoor concentration vary from 3.70 Bq/m3 to 218.30 Bq/m3 with an average value of 84.04 Bq/m3. The value of effective dose varies from 0.08 mSv to 3.76 mSv with an average value of 1.45 mSv.


M. A. Olaoye,

T. J. Aluko,

O. A. Jegede,

M. F. Agbesi and

O. O. Ajayi

JJP, 2017, 10(3) , 139-141

Fuel Ignition Conditions in Thermonuclear Fusion

The isobaric and isochoric models of inertial confinement fusion (ICF) are compared in hot spot concept. Heating and cooling mechanisms of fuel are theoretically investigated. Some corrections are suggested to improve the Bremsstrahlung emission calculation at ultra-relativistic regime and super high temperature plasma situation. An admissible region of values is determined which satisfy hot spot spark-ignition condition to start a self-sustaining fusion burn. An optimized point of this region is specified to achieve a maximum fuel gain. The density and radius of this optimum point are determined applying a hydrodynamic model. ...


M. Mahdavi


JJP, 2017, 10(3) , 143-151

Assessment of Human Exposures to Radiation Arising from Radon in Groundwater Samples from Parts of Abeokuta, Ogun State, Nigeria

This study aimed at assessing the level of radiation dose arising from consumption of well-water from different parts of Abeokuta metropolis by measuring the concentrations of 222Rn and 220Rn in well-water samples using two types of solid state nuclear track detector; namely, CR-39 and LR-115. At each well location, water sample of 3.7ml was dispensed into two specially designed plastic cups. The two detectors were exposed to alpha particles emitted by 222Rn, 220Rn and their decay products emanating from each water sample for forty days. The 222Rn concentration obtained ranged from 3.1 to 90.8 kBq/m3. The statistical analysis of radon concentration showed that 94% of the wells studied had radon concentration above the United States Environmental Protection Agency’s maximum contaminant level of 11.1 kBq/m3, while none of the samples had up to 1000 kBq/m3 above which remedial action is recommended by the European Union. ...


J. A. Rabiu,

O. A. Mustapha,

V. Makinde and

A.M. Gbadebo

JJP, 2017, 10(3) , 153-164

Electromagnetic Transmission from a Dielectric Loaded Resistive Cylindrical Pipe

We obtained analytically closed form expressions for longitudinal electric impedance and transmission coefficient of a dielectric loaded resistive cylindrical pipe of finite thickness. These expressions are valid for an axial current in a form of a point source moving parallel to the pipe axis with an offset a. The resistive–wall impedance and the transmission coef­ficient have been numerically visualized for some representative machine parameters. For wall thicknesses less than the skin penetration depth, the wall becomes transparent for the excited electromagnetic fields. Very good shielding for standard operation can be achieved by thin metallic walls of thicknesses of the order of few skin penetration depths. ...


M. S. Bawa’aneh,

A. M. Al-Khateeb and N. Laham


JJP, 2017, 10(3) , 165-172