Laith Najam

Laith Najam
University of Mosul · College of Sciences

Prof. Dr.
Now and my student M.Sc. working in the project of Natural radioactivity and we published many paper

About

142
Publications
45,117
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579
Citations
Citations since 2017
80 Research Items
498 Citations
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2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
Introduction
Laith Najam currently works at the College of Sciences, University of Mosul. Their current project is 'Measuring the concentration of natural radioactivity elements in soil samples in Nineveh province I have many published papers , Also I am Director-in-Charge of Rafidian Journal of Science Also i am the editorial board and the reviewer of different journals, some journals are indexes in Scoups
Additional affiliations
December 1991 - present
University of Mosul
Position
  • Professor (Full)

Publications

Publications (142)
Article
Full-text available
The fundamental goal of the current study is to determine the mean activity concentrations of natural and artificial radionuclides of 226 Ra, 232 Th, 40 K, and 137 Cs using gamma spectrometry for three locations, in Egypt, Saudi Arabia, and Iraq, which are significant and vital countries in the Middle East. The mean absorbed dose rate equals 22.35,...
Article
Full-text available
In this paper, the concentration of the activity of natural radionuclides is represented by 238 U, 232 Th and 40 K. This concentration was measured by gamma spectroscopy, which was used to determine and calculate radioactive heat production for all radionuclides and their distribution pattern Radiogenic heat production from natural radionuclides 30...
Article
Full-text available
In this study, the specific activity was identified in 12 fertilizer samples using a gamma spectroscopy, and the results showed that the average specific activity of natural radionuclides (226Ra, 232Th, 40 K) was 36.24 ± 0.767 Bq/kg, 55.40 ± 0.973 Bq/kg, and 202.87 ± 5.062 Bq/kg, respectively, where the average specific activity of 226Ra and 232Th...
Article
Full-text available
This study was conducted in order to measure the levels of natural radiation in sediments of the Tigris River in the city of Mosul, in northern Iraq, using the gamma spectroscopy technique to calculate the activity concentrations of natural radionuclides in the sediments, The results showed that the activity concentrations of 226 Ra, 232 Th, and 40...
Article
Full-text available
I N the framework of the sdg-interacting boson model (sdg-IBM1), we study the nuclear structure of Os isotopes. Recent calculations of E2 and E4 transitions in the Os isotopes that can not be clarified in the sd-boson models need this extension. We illustrate how gamma-unstable and triaxial shapes arise from special Hamiltonian sdg-model choices an...
Article
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MIXED SYMMETRY STATES IN 92 Zr AND 94 Mo NUCLEI Mixed-symmetry states of 92 Zr and 94 Mo isotopes are investigated with the use of the collective models, Interacting Boson Model-2 (IBM-2) and Quasiparticle Phonon Model (QPM). The energy spectra and electromagnetic transition rates for these isotopes are calculated. The results of IBM-2 and QPM are...
Article
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This article addresses control for the chaos antisynchronization of a high frequency oscillator nuclear spin generator (NSG), which generates and controls the oscillations of the motion of a nuclear magnetization vector in a magnetic field. Based on the Lyapunov stability theory, an adaptive control law is derived to make the states of two identica...
Article
Full-text available
Introduction: Radioisotopes are naturally the main sources of human exposure to external and internal radiation. Biscuit is a type of food that is widely distributed in all markets, especially in the markets of Iraq. Therefore, the current study aimed to measure the radiation level of some nuclei in biscuit samples and determine the radiation risks...
Article
Full-text available
This study aims to assess the concentrations of natural radionuclides activity (226Ra,232Th and 40 K) and calculate a number of radiation risk indicators in some types of field crops in different areas of Tikrit City-Salah Al-Din Governorate-Iraq. The measurement was carried out using a gamma-ray spectroscopy connected with a scintillation detector...
Article
Full-text available
In this paper, the effect of alpha particles on cadmium selenide thin film properties was invistecated. (CdSe) thin films prepared on glass bases at 50°C and 70°C tempartures, and pH=9 using the chemical bath deposition method. The irradiation was performed on (CdSe) films use the alpha particles source Americium (Am-241) with activity of 50 Ci and...
Article
Full-text available
Ten samples were studied from sediments collected from the Tigris River in the city of Mosul, and gamma ray spectroscopy NaI(TI) was used in order to detect and calculate the content of natural radionuclides for all samples collected. The results of the samples analyzed for the specific activity of ²²⁶ Ra ranged from 6.30±0.319 Bq/kg to 13.73±0.411...
Article
Full-text available
This study aims to assess the concentrations of natural radionuclides activity ( ²²⁶ Ra, ²³² Th and ⁴⁰ K) and calculate a number of radiation risk indicators in some types of field crops in different areas of Tikrit City - Salah Al-Din Governorate - Iraq. The measurement was carried out using a gamma ray spectroscopy connected with a scintillation...
Article
Full-text available
Introduction: The radon isotopes are not as significant as ( ²²² Rn) due to the decay of the natural radionuclides ( ²³⁵ U), ( ²³² Th) and ( ²³⁸ U) due to their short half-life, at most. ( ²²² Rn) can be classified as among the most harmful radioactive elements in the world. Material and method: In this analysis, the closed-can technique was used w...
Article
Full-text available
CdSe films were prepared using the chemical bath deposition method on glass bases and at temperatures of 50°C and 70°C, PH = 9, the CdSe films were exposed to neutron irradiation from the (Am 241-Be 10) source with a flux of 3 × 10 5 n/cm 2 .s and energy 5.71MeV for a period of irradiation for a 7 days, the optical properties of irradiation were st...
Article
Full-text available
In this paper, the effect of alpha particles on cadmium selenide thin film properties was invistecated. (CdSe) thin films prepared on glass bases at 50°C and 70°C tempartures, and pH=9 using the chemical bath deposition method. The irradiation was performed on (CdSe) films use the alpha particles source Americium (Am-241) with activity of 50 μ Ci a...
Article
Full-text available
We analyze a sequence of 194−204 Po isotopes, using the Configuration Mixing (CM) Interacting Boson Model 2 (IBM-2). We set the parameters of Hamiltonian using a least-square fit for the known energy levels, electrical transition rates (2), and quadruple moments (2 + 1) for the first excited states. We have a good agreement with the experimental va...
Article
Full-text available
The aims of the present work are to find the effect of gamma rays radiation at three doses in m Gy/h as radiation doses rate for 55 days at 7h/day irradiation on sex ratio of male and female rats. A significant decrease was noticed (p˂ 0.05) in the sum number of offspring, the number of male sex and male sex ratio when exposed to the doses from 0.0...
Article
Full-text available
The current study aims to measure and calculate the concentrations of natural radioactive elements (226 Ra, 232 Th, 40 K) in samples of fertilized soil and non-fertilized soil in different areas of Tikrit, the administrative center of Salah al-Din Governorate. The measurement was carried out using a gamma-ray spectroscopy system connected with a sc...
Article
In the present work, radioactivity level in 15 collected soil samples from the area around fertiliser factory in Upper Egypt has been measured using gamma ray Spectrometry due to radionuclides occurred naturally namely ²²⁶Ra, ²³²Th and ⁴⁰K to study the concentrations of these nuclides in this soil and determine the effect of Assuit fertiliser facto...
Article
Full-text available
Introduction: The present study investigated the risks of ionizing radiation on sperm counts in chronic doses and compared the findings with previous results in similar and different conditions to minimize oxidant stress on sperm parameters rather than using black seed oil. Material and Methods: Twenty rats were used in experimental designs 1 and...
Article
Full-text available
Introduction: The present study investigated the risks of ionizing radiation on sperm counts in chronic doses and compared the findings with previous results in similar and different conditions to minimize oxidant stress on sperm parameters rather than using black seed oil. Material and Methods: Twenty rats were used in experimental designs 1 and a...
Article
Full-text available
The aims of the present work are to find the effect of gamma rays radiation at three doses in m Gy/h as radiation doses rate for 55 days at 7h/day irradiation on sex ratio of male and female rats. A significant decrease was noticed (p˂ 0.05) in the sum number of offspring, the number of male sex and male sex ratio when exposed to the doses from 0.0...
Article
Full-text available
In this paper, alongside Heisenberg's principle of uncertainty, the De-Broglie wavelength hypothesis was used to conclude at a new understanding of the quantum impedance shown by the proton when interacting with the material. It also extracted the quantum impedance, speed, and frequency of electron (a beta particle with energy below 1MeV). This ass...
Article
Full-text available
The essential objective of this study was to estimate ²²²Rn, ²³⁸U, and ²²⁶Ra concentrations of plankton samples, along with the risk indices defined by PAEC, Ep, AED and CPPP. These analyzes were carried out on plankton samples from fifteen-alley air conditioner filters in the old Mosul area. In this analysis, using the cumulative monitoring techni...
Article
Full-text available
The effect of gamma radiation on CR-39 detector was determinate through the image processing for the photoelasticity images by using of MATLAB software. The maximum change different in CR-39 detector colors at photoelasticity technique was appear at the value 2 kN as a mechanical compression effect. It was adopted this value of mechanical compressi...
Article
Full-text available
IN this paper, alongside Heisenberg's principle of uncertainty, the De-Broglie wavelength hypothesis was used to conclude at a new understanding of the quantum impedance shown by the proton when interacting with the material. It also extracted the quantum impedance, speed, and frequency of electron (a beta particle with energy below 1MeV). This ass...
Article
Full-text available
Wheat and barley crops are used as food by humans and animals, their health effects on human life must be under the control, so it is important to measure their radiation concentrations. This work aimed to determine radon, radium, and uranium in barley and wheat crops planted in the Nineveh plains region. The technique of alpha track registration b...
Article
Full-text available
Wheat and barley crops are used as food by humans and animals, their health effects on human life must be under the control, so it is important to measure their radiation concentrations. This work aimed to determine radon, radium, and uranium in barley and wheat crops planted in the Nineveh plains region. The technique of alpha track registration b...
Article
Full-text available
Spices are mainly used as additives to diets in different countries, including our country, so it is necessary to ensure that they are free of radioactive substances harmful to human health. This research aimed to measure the concentrations of alpha emitters , and measure the annual effective dose AED resulting from the intake of radon. The CR-39 d...
Article
Full-text available
Sixteen samples of granular chemical fertilizer types (NPK, DAP, and Urea) were collected from Iraqi nurseries and analyzed using NaI(Tl) gamma-ray detector. Three radionuclides K-40, U-238, and Th-232 were detected in the studied samples. All NPK fertilizers have a specific activity of K-40 greater than the standard limits except Some samples (N.1...
Article
Full-text available
The measurement of magnetic susceptibility is a simple and rapid method that provides a reliable idea of the degree of heavy metal contamination in sediments. In the present work, the concentration of heavy metals such as Mg, K, Ca, Ni, As Ba, V, Cr, Mn, Co, Zn, La, Pb, Ti, Al and Fe was determined by EDXRF technique in sediments collected from Poo...
Article
Full-text available
Introduction: The study aimed to find the low dose effect gamma ray on some hematological parameters in male albino rats obtained from the Mosul University, IRAQ, and also studied the radioprotective effect of black seed oil on the hematological parameters. Material and Methods: The system is made of 241Am as gamma source .The rats were exposed to...
Article
Full-text available
In order to measure the concentration of natural radionuclides in soil. The gamma spectrometric method (using 2.5x 3.8 cm NaI(Tl) detector) was performed on soil samples .These samples were taken from different soil sites of Ancient Mosul in Mosul City, North of Iraq. Thirty Four soil samples were measured in order to assist specific activities of...
Article
Full-text available
Uranium concentration and the annual committed effective dose in some selected medicinal plants commonly used in Iraq have been determined using fission tracks technique etch in twelve medical plants samples using CR-39 track detector. The results show that the uranium concentration ranged from 0.044±0.021 ppm in Thyme sample to 0.2±0.03 ppm in Bla...
Article
Full-text available
The aim of this study is to assess the degree of contamination in drinking water sources around the holy mountain "Arunachala" in Tiruvannamalai, Tamil Nadu. Drinking water samples from 20 different sites were collected, and their physio-chemical parameters, pH, electrical conductivity and total dissolved solvents were determined. An LED fluorimete...
Article
Full-text available
Introduction: Given that the groundwater is a radon contaminated and used as a source for drinking water, then measuring the amount contamination is of high necessity. Material and Methods: The measurement was performed using RAD-7 detector. Results: The measured radon concentration values ranged 1.20-15.43 Bq/l with the mean of 5.18±0.39 Bq/l. The...
Article
Full-text available
bstract Uranium concentration and the annual committed effective dose in some selected medicinal plants commonly used in Iraq have been determined using fission tracks technique etch in twelve medical plants samples using CR-39 track detector. The results show that the uranium concentration ranged from 0.044±0.021 ppm in Thyme sample to 0.2±0.0...
Article
Full-text available
The aim of the study is to calculate the alpha emitters in bone samples of some animals by counting the tracks of alpha particles emitted from radioactive nuclei (Pb-210, Po-210, Ra-226) using the CN-85 detector. The detectors were kept with the samples in closed clear plastic cups at a 2 cm distance for 60 days. The track density in the detector,...
Article
Full-text available
In this work, the concentrations of natural uranium, uranium isotopes, and the annual effective dose in the surface water for both of Al-Manathera and Al-Heerra regions of An-Najaf, Iraq were determined using a solid state, nuclear track detector, type (CR-39). The results show that the average of uranium concentrations in Al-Manathera and Al-Heerr...
Article
Full-text available
Introduction: Radioisotopes are naturally the main sources of human exposure to external and internal radiation. Biscuit is a type of food that is widely distributed in all markets, especially in the markets of Iraq. Therefore, the current study aimed to measure the radiation level of some nuclei in biscuit samples and determine the radiation risks...
Article
Full-text available
Introduction: Radioisotopes are naturally the main sources of human exposure to external and internal radiation. Biscuit is a type of food that is widely distributed in all markets, especially in the markets of Iraq. Therefore, the current study aimed to measure the radiation level of some nuclei in biscuit samples and determine the radiation risks...
Article
Full-text available
Introduction: This Study has was carried out to measure and detect the natural occurred radionuclide content including 226Ra, 232Th and 40K in the Nile River sediments at various locations in Upper Egypt, from Aswan to El-Minya. Additionally, we determine the absorbed dose rate, the annual effective dose equivalent, and excess lifetime cancer risk...
Article
Full-text available
Introduction: This Study has was carried out to measure and detect the natural occurred radionuclide content including 226Ra, 232Th and 40K in the Nile River sediments at various locations in Upper Egypt, from Aswan to El-Minya. Additionally, we determine the absorbed dose rate, the annual effective dose equivalent, and excess lifetime cancer risk...
Article
Full-text available
Introduction: This Study has was carried out to measure and detect the natural occurred radionuclide content including 226Ra, 232Th and 40K in the Nile River sediments at various locations in Upper Egypt, from Aswan to El-Minya. Additionally, we determine the absorbed dose rate, the annual effective dose equivalent, and excess lifetime cancer risk...
Article
Full-text available
The penetration of (He-Ne) laser beam on the Nuclear Track Detectors (NTDs) types CR-39 and CN-85 was measured after the gamma radiation effects with doses (0, 42.3, 84.6, 126.9, 169.2, 211.5, 253.8 Gy) and (0, 12.7, 25.4, 38.1, 50.8, 63.4, 76.1, 88.8 Gy) or CR-39 and CN-85 detectors, respectively. The penetration of (He-Ne) laser beam was also mea...
Article
Full-text available
In this study, the results of the 238 U, 226 Ra concentrations and 222 Rn exhalation rate in 20 tea samples were described using a plastic nuclear track detector (CR-39). Samples were collected from various local Iraqi markets. The chemical was drilled using NaOH solution at 70°C for 8 hours to detect the underlying trajectories, which were then sc...
Article
Full-text available
In this study, the results of the 238 U, 226 Ra concentrations and 222 Rn exhalation rate in 20 tea samples were described using a plastic nuclear track detector (CR-39). Samples were collected from various local Iraqi markets. The chemical was drilled using NaOH solution at 70°C for 8 hours to detect the underlying trajectories, which were then sc...
Article
Full-text available
In this study, the results of the 238 U, 226 Ra concentrations and 222 Rn exhalation rate in 20 tea samples were described using a plastic nuclear track detector (CR-39). Samples were collected from various local Iraqi markets. The chemical was drilled using NaOH solution at 70°C for 8 hours to detect the underlying trajectories, which were then sc...
Article
Full-text available
Introduction: This Study has been carried out to measure and detect the natural occurred radionuclide (226Ra, 232Th and 40K) in some Nile River sediments from Aswan to El-Minia, Upper Egypt, the absorbed dose rate, annual effective dose equivalent and excess lifetime cancer risk also has been calculated. Materials and Methods: The gamma ray measure...
Book
Full-text available
This study included determine to the ability of some building materials on the attenuation of gamma rays by FindLinear andMass Attenuation Coefficients and examination of homogeneity for this materialsby using spectroscopy gamma rays( UCS20) associated with the (NaI (TI)) at energies of gamma rays (81, 356, 662, 1173, 1332) keV which emitted from S...
Article
Full-text available
Background: Oil exploration is known to have great impact on the environment due the presence of natural radionuclides in crude oil and bitumen. Materials and Methods: In this study, high purity germanium (HpGe) detector was used to determine the activity concentrations of 40K, 226Ra and 232Th in bituminous soil and viscous bitumen samples collecte...
Article
Full-text available
In this work, a set of indoor Rn-222 measurements was carried out in different dwellings of Baghdad province. Radon gas concentrations were determined by using Rad-7 detector. The results show that the highest average CRn in indoor dwellings was found in Al-Rashid region which was (119.30 Bq/m3), while the lowest average CRn was found in Al-khamiya...
Article
Full-text available
In this work, a set of indoor Rn-222 measurements was carried out in different dwellings of Baghdad province. Radon gas concentrations were determined by using Rad-7 detector. The results show that the highest average CRn in indoor dwellings was found in Al-Rashid region which was (119.30 Bq/m3), while the lowest average CRn was found in Al-khamiya...
Book
Full-text available
This study involves the topic of radioactivity in soil of some regions in Nineveh governorate through measuring radioactivity concentration of radionuclide's in soil samples collected from these regions ,and calculation of some radiological parameters. Gamma ray spectrometers with NaI(Tl) detector system and high purity germanium (HPGe) detector sy...
Article
Full-text available
In this work, a set of indoor Rn-222 measurements was carried out in different dwellings of Baghdad province. Radon gas concentrations were determined by using Rad-7 detector. The results show that the highest average CRn in indoor dwellings was found in Al-Rashid region which was (119.30 Bq/m 3), while the lowest average CRn was found in Al-khamiy...
Article
Full-text available
Nuclear track detectors (NTDs) are affected by particulate and non-particulate radiations. However, the effect of ultraviolet radiatio, (as an electromagnetic non particulate) radiation was determined by changes in spectroscopic and optical parameters of irradiated nuclear track detectors. Nuclear track detectors, namely CR-39 and CN-85 were UV-irr...
Article
Full-text available
In the present work, the natural radioactivity of surrounding soil samples collected from Assuit cement factory (Egypt) have been measured by using NaI(Tl) detector. Gamma analysis for each sample along with the calculated specific activities shows that the average concentrations of Ra-226, Th-232 and K-40 were 31.44 ± 3.67 Bq kg −1 , 39.77 ± 2.00...