Ali Ahmed

Ali Ahmed
Salahaddin University-Erbil | SUH · Department of Physics

PhD

About

72
Publications
12,893
Reads
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330
Citations
Additional affiliations
October 2015 - October 2015
University of Technology Malaysia
Position
  • supervisor of a split site PhD student
January 2003 - April 2016
Salahaddin University-Erbil
Position
  • Laboratory Manager

Publications

Publications (72)
Article
Full-text available
This study examines the impacts of radon exposure on male albino rats' lungs, which is a prominent cause of lung cancer, as well as the defensive roles of melatonin as an antioxidant by examining the activities of superoxide dismutase SOD, malondialdehyde MDA, and hydroxyproline. The study is comprised of two experiments. In the first experiment, i...
Article
Full-text available
This research investigates the radioactivity levels of various rock types used in construction within the Kurdistan region and assesses their potential impact on human health, the measurements were performed using an HPGe gamma-ray spectrometer. The measured activity concentrations of 226Ra, 232Th, and 40K radionuclides varied from ND (Chromitite)...
Article
In this work, the experimental EXFOR data collected across the neutron-induced energy between 14 and15 MeV were used to produce empirical formulas to calculate the (n, \(\alpha\)) reaction cross-section. By including the asymmetry parameter, mass number and average binding energy into the main empirical formula, we achieved empirical systematics fo...
Article
Full-text available
This study examined the effects of radon on the endogenous antioxidants, biochemical, and hematological parameters of workers in Erbil, Iraqi Kurdistan. This was carried out to ascertain how radon affects the health of those who work in certain factories producing building materials. The case study group consisted of 70 workers, who were then divid...
Article
Nuclear medicine seems to be a decent choice of medicine in the recent decade. The radioactive isotopes 51Cr, 89Sr, 99Tc, 131I, 133Xe, 137Cs and 153Sm are extremely essential in nuclear medicine. The excitation functions of the 54Fe (n, α) 51Cr, 92Zr (n, α) 89Sr, 102Rh (n, α) 99Tc, 134Cs (n, α) 131I, 136Ba (n, α) 133Xe, 140La (n, α) 137Cs and 156Gd...
Article
In this study, the activity concentrations of 40K, 232Th, and 226Ra radionuclides were estimated in imported milk powder samples from 40 brands available in local markets in Erbil Governorate, Iraq. The measurements were performed using High Purity Germanium (HPGe) detector. The results indicated that the average activity concentrations of 40K, 232...
Article
Full-text available
In this research, the radioactivity caused by natural radionuclides (⁴⁰ K, ²³²Th, and ²²⁶Ra) was evaluated in infant milk consumed in Erbil, Iraq. The measurements were performed using an HPGe gamma-ray spectrometer. The variation of activity concentrations in milk samples was (99.56–256.9 Bq kg⁻¹) for ⁴⁰ K, (BDL–0.53 Bq kg⁻¹) for ²³²Th, and (0.27–...
Article
Full-text available
Radiometric monitoring of construction materials is required for estimating the interior and exterior exposure to ionizing radiation emitted by terrestrial radioactive elements in building materials. Using gamma-ray spectroscopy, the activity concentrations of 226Ra, 232Th, and 40 K in fifty-two samples from eighteen different building materials co...
Article
Radon gas has long been connected with human public health risks. Building materials, one of the biggest producers of this gas in enclosed areas, are thought to be among the most important channels of this gas. The radon concentration, radon exhalation rate as well as the annual effective dose for 52 building material samples (granite, ceramic, mar...
Article
In the last decade, nuclear medicine appears to be a good choice of medicine. ⁵⁸Co, ⁹⁹Mo, ⁹⁹Tc, ⁹⁹Re, ¹³³Xe and ¹⁸⁶Re are very important radionuclides for nuclear medicine. In this study, the excitation functions of ⁵⁸Ni (n, p) ⁵⁸Co, ⁹⁹Tc (n, p) ⁹⁹Mo, ⁹⁹Ru (n, p) ⁹⁹Tc, ¹³¹Xe (n, p) ¹³¹I, ¹³³Cs (n, p) ¹³³Xe and ¹⁸⁶Os (n, p) ¹⁸⁶Re nuclear reactions w...
Article
Semi-empirical formula for calculating the average (n, α) reaction cross-section was derived by using the EXFOR experimental data at 14-15 MeV neutron energies for 133 target nuclei in the mass number range 9≤A≤ 209. In this new systematic, the non-elastic cross-section portion has been modified by〖〖 (A〗^(1⁄3)+1)〗^(-0.5196)*(BE/A), while the asymme...
Article
The main objective of this research is to determine the environmental health concerns associated with radon gas accumulation and compare quantities in various kinds of construction factories in Erbil city. For this purpose, 52 dosimeters were deployed throughout 13 industries by using CR-39 solid-state nuclear track detectors (SSNTD). These tests w...
Article
Universal decay law (UDL) with screening amendments for α-decay [Eur Phys J A (2021) 57:41] is further modified by inclusion of asymmetry and angular momentum effects. The predicted half-lives for α-decay are found with excellent match with the experimental data with lower root mean square error (RMSE) calculated by the modified version of the form...
Article
Abstract In this study, three empirical formulae for calculating the (n, p) reaction cross section were derived from the EXFOR experimental data conducted over neutron energy range of 14–15 MeV. By incorporating the proton separation energy and binding energy into the principal formula, we obtained empirical formulae for estimating the (n, p) react...
Article
New empirical formulae for calculating the (n, p) reaction cross-sections were obtained by using the EXFOR experimental data for the neutron energy 14–15 MeV. Considering the average binding energy per nucleon and dependences of cross-section in the principal formula, we get empirical formulae for estimating the (n, p) reaction cross-sections for 1...
Article
Full-text available
In this study, the cooking liquid oil as a principal foodstuff element in meals of Kurdistan region population has been examined for radioactivity assessment. The activity concentration of natural and artificial radionuclides in twenty one oil types available in Kurdistan region markets were calculated using NaI(Tl) gamma-ray spectrometer. The resu...
Article
We present a modified version of the semi-empirical formula SemFIS, which is based on the fission theory for predicting the alpha decay half-lives. The first version of SemFIS was found by D. N. Poenaru et al. and was at that time the best formula to predict the alpha-decay half-lives of superheavy nuclei among 18 different existing models. We comp...
Article
This paper is devoted to the obtaining of the exact solutions in the framework of modified f(R)-gravity's rainbow(UV completion of General Relativity)/f(R)-gravity and the study of their thermodynamic behavior. In the f(R)-gravity's rainbow, we have analyzed the concept of effective potential barrier by transforming the radial equation of motion in...
Article
Full-text available
In this work, we obtain the black hole solutions in the dilaton [Formula: see text]-gravity (R is not considered as a constant here) and investigate their thermodynamics especially phase transition and critical behavior in the anti-de Sitter (AdS) extended phase-space. We obtain the exact Banados, Teitelboim and Zanelli (BTZ) counterpart solutions...
Article
Full-text available
In this work, a new class of black hole solutions in dilaton gravity has been obtained where the dilaton field is coupled with nonlinear Maxwell invariant as a source. The background space–time in this works is considered as the d-dimensional toroidal metric. In the presence of the dilaton field (for some unique values of Na), the electric field in...
Article
We construct a new class of black hole solutions of Einstein’s gravity in the presence of dilaton/scalar fields. In this regard, we present a general action (Eq. (1) in the introduction) where Einstein’s gravity is coupled with these fields. Using this action, we derive the equations of motion. Moreover, we employ n-dimensional static toroidal spac...
Article
An empirical formula to calculate the ([Formula: see text], [Formula: see text] reaction cross-sections for 14.5[Formula: see text]MeV neutrons for 183 target nuclei in the range [Formula: see text] is presented. Evaluated cross-section data from TENDL nuclear data library were used to test and benchmark the formula. In this new formula, the nonela...
Article
We construct a higher dimensional spinning solution in f(R) gravity coupled with non-linear Yang–Mills(YM) field via complex transformations which is known as Newman–Janis Algorithm(NJA). This task shows that the NJA can be applied in higher dimensional geometry as well. In analyzing the horizon properties, we have showed that the event horizon is...
Preprint
Full-text available
In this work, a new class of slowly rotating black hole solutions in dilaton gravity has been obtained where dilaton field is coupled with nonlinear Maxwell invariant. The background space-time is a stationary axisymmetric geometry. Here, it has been shown that the dilaton potential can be written in the form of generalized three Liouville-type pot...
Article
Theoretical half-lives of α decay for lead (Pb) isotopes (Z=82) in the range 178≤A≤220 systematically have been investigated within the modified generalized liquid drop model (MGLDM). Akrawy, Royer, AKRE, and Modified RenB formulas are used to evaluate α-decay half-lives. The experimental Q values are used. The results are compared with the experim...
Article
The half-life of a parent nucleus of Astatine isotopes [Formula: see text] decaying via alpha emission is investigated by employing Coulomb and proximity potential model (CPPM) using the WKB barrier penetration probability and other different analytical and semiempirical formulae of Royer, AKRE, Akrawy, RoyerB, MRoyerB, MRenB, SemFIS, VS and SLB. I...
Article
Full-text available
In this work, a new class of slowly rotating black hole solutions in dilaton gravity has been obtained where dilaton field is coupled with nonlinear Maxwell invariant. The background space–time is a stationary axisymmetric geometry. Here, it has been shown that the dilaton potential can be written in the form of generalized three Liouville-type pot...
Article
In this study, the α-decay half-life of 160 superheavy nuclei (SHN) with 105≤Z≤120 has been calculated using six empirical formulas: the scaling law of Brown (SLB), the modified scaling law Brown formula (MSLB), the Yibin et al. formula (YQZR), the modified Yibin et al. formula (MYQZR), the Viola-Seaborg formula (VS), and the modified Viola-Seaborg...
Article
The systematics of neutron-induced reactions at 14.5MeV are of great importance to describe the excitation of nuclei for the (n,p) reactions. In this study, a new empirical formula is obtained by introducing the proton separation energy to the principal empirical formula for estimating the (n,p) reaction cross-sections for 77 nuclei in the light el...
Article
A set of empirical formulae have been proposed to calculate the α-decay half-lives from ground state to ground state transitions of 356 nuclei classified to different set of e–e, e–o, o–e and o–o isotopes. Within these formulae, modification of the previous set of Royer expressions were done by introducing three different physical terms, including...
Article
Full-text available
In this study, sediments from different resources of Darbandikhan Lake were studied through 100 samples taken from spring, stream, and lake during the four seasons. The specific activity of (238U, 232Th and 40K) natural radionuclides have been measured using the Gamma Spectrometry analysis with HPGe detector. The measured average activity concentra...
Conference Paper
Full-text available
A study of natural and artificial radionuclides in nut and seed samples consumed in Erbil city has been performed. The NaI(TI) scintillation detector and nuclear track detector were used to measure the activity concentration of ⁴⁰K, ²³²Th, ²²⁶Ra, ¹³⁷Cs and ²²²Rn; respectively. The measured activity in samples ranges from (207.63 to 533.88) Bq.kg-1...
Article
Full-text available
In this research, radon activity concentrations in the available types of bottled drinking water samples available in Iraqi Kurdistan region markets were measured by using passive (CR-39 SSNTDs) and active (Durridge RAD-7-H2O with a closed loop) methods. Radon concentration in bottled water ranged from (0.050 to 0.585) Bq/l for CR-39 with a mean va...
Article
A total of 100 sediment samples were collected from Darbandikhan Lake and its different resources (spring, stream, and lake) during the four seasons. Spectrometry analysis of HPGe detector was used for measuring the specific activity. The seasonally measured mean activity concentration of ²³⁸U, ²³²Th and⁴⁰K for sediment samples were 11.9±1.0, 7.8±1...
Article
Full-text available
The activity concentrations of 226 Ra, 232 Th and 40 K in the core samples obtained from Erbil oil blocks have been measured by using NaI(TI) gamma ray spectrometry. Radiological hazard indices were evaluated from the activity concentrations of these radionuclides in order to estimate health effects of the exposure of the public to radiation at the...
Article
Full-text available
A study of natural and artificial radionuclides in nut and seed samples consumed in Erbil city has been performed. The NaI(TI) scintillation detector and nuclear track detector were used to measure the activity concentration of 40 K, 232 Th, 226 Ra, 137 Cs and 222 Rn; respectively. The measured activity in samples ranges from (207.63 to 533.88) Bq....
Conference Paper
A total of 164 water samples were collected from Darbandikhan Lake with their different resources (spring, stream, and lake) during the four seasons, and the measurements were carried out using the electronic RAD 7 detector. For spring water the average radon concentration for spring, summer, autumn and summer were found to be 8.21 Bq/1, 8.94 Bq/1,...
Article
Full-text available
Objective.The present study aimed to determine the alteration in hemodynamic and oxidative stress caused by gamma-irradiation in both sexes of rats. Materials and Methods: Twenty-four albino rats were randomly divided into two groups The first group includes twelve rats (Six males and six females) served as control, while the rats of the second gro...
Article
Full-text available
In order to initiate a radiological assessment program and to establish a baseline map of radioactivity background levels in the Kurdistan region environment, this study have been adopted to identify the radionuclide contents in the soil of Bekhma dam region. The activity concentration of natural radionuclide in 12 soil samples, collected from muni...
Conference Paper
Full-text available
The control and monitoring of radioactive elements in foodstuffs is fundamental for human health maintenance. This work presents procedures to measure the 40K radioactivity levels in the powdered milk samples. The amounts of radioactivity in the fourteen powdered milk samples have been investigated; samples were collected from the local markets of...
Article
Full-text available
This work investigates the natural 226 Ra, 232 Th, 40 K , 222 Rn, 220 Rn and man-made 137 Cs radionuclides in foodstuff elements consumed by Iraqi Kurdistan region population (Erbil).The measurements were carried out by using a high efficiency NaI(TI) gamma-ray spectrometerandCR-39 solid state nuclear track detectors. The estimated average activity...
Research
Full-text available
In this study the assessment of indoor radon concentration in the air of Qaysare in Erbil city have been studied by using CR-39 Solid–State Nuclear Track Detector Technique. A total of 18 selected zones inside the suq have been selected to place the dosimeters. The average radon concentration was found to be 21.54 ± 8.017 Bq/m 3 which is fortunatel...
Article
Full-text available
This work investigates the natural 226 Ra, 232 Th, 40 K , 222 Rn, 220 Rn and man-made 137 Cs radionuclides in foodstuff elements consumed by Iraqi Kurdistan region population (Erbil).The measurements were carried out by using a high efficiency NaI(TI) gamma-ray spectrometer and CR-39 solid state nuclear track detectors. The estimated average activi...
Conference Paper
Full-text available
As the Kurdistan region starts a huge investment in the field of oil and gas, the assessment of radioactivity due to naturally occurring radioactive material becomes important. The dose rates and associated situational doses in the oil company and the radioisotope concentrations in the production mud and crude oil sample will be determined and then...
Article
Full-text available
ABSTRAcT In this work the calculation of the concentration of radionuclide 226 Ra in twenty samples of soil in Bekhma region have been done by gamma-ray spectroscopy NaI(Tl) scintillation detector. The range of 226 Ra activity was found from 8.11 ± 0.76 to 22.42 ± 1.13 Bq/Kg. The concentrations of radon gas in the air was determined as well as the...
Research
Full-text available
The aim of the study was to compare radon concentrations and effective dose equivalent in state hospitals inside the Erbil city having different periods of building. Effective doses were estimated in different floors of the five selected hospitals by using the (CR-39) solid state nuclear track detectors with the guide of ICRP Publication 66. The ha...
Article
Full-text available
The amounts of radioactivity in the igneous rocks have been investigated; samples were collected from the total of eight basalt rock types in the northeastern of Kurdistan region/Iraq. The activity concentration of 226 Ra (238 U) series, 228 Ac (232 Th) series, 40 K and 137 Cs were measured using Planar HPGe and NaI(Tl) detectors. Along the study a...
Article
Empirical formulae have been obtained for calculating neutron yields from (alpha,n) reactions on Be-9, F-19, Na-23, and Al-27 thick target elements in the energy range from threshold up to 10 MeV alpha-energies. Different type of expressions have been tried to fit the weighted average (W.A.) of n-yield data. For the first time New polynomial expres...
Article
Full-text available
Radioactivity of let ,rd shielding blocks and the Marinelli beaker used with a computerize Gamma- Ray ,spectroscopy were studied. More than twenty Lines were identified and ascribed to radiomuclides of Uranium. Thorium and Actinium natural decay serieses, as well as the 1461 keV y-line due to natural 40K radio muclide was clearly observed. For thes...

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