Personal Information
Laith Najam

Department of Physics, College of Science, Mosul University, Mosul, Nineveh, Iraq

Laith Najam
From 14/12/1991 to till now 12/3/2016, Ph.D. , IRAQ
Work Experiences
From 14/12/1991 to till now 12/3/2016, Ph.D. , Mosul University,IRAQ
From 2012 to 2013, Studying The linear and The Mass Attenuation Coefficient of Gamma Rays for Certain Building Materials used in Iraq M.S. Thesis , Determine the ability of some shields for different materials on the gamma –ray attenuation M.Sc. Thesis
From 2011 to 2012, the effect of Gamma and Neutron on the ZnO prepared by Chemical Vapor , Zinc Oxide (ZnO) thin films were prepared by Chemical Vapor Deposition technique (CVD), at a normal atmospheric pressure on a glass substrate at temperature 400oC. The structural, optical and electrical properties of the films were studied before and after gamma-ray irradiation, with different radiation doses (0, 0.5, 1, 2) Gy. Also, other samples were exposed to neutrons beam for exposure periods (2,4, 8, 10) hours
From 2014 to 2015, Measuring the concentration of the natural radioactive elements in soil samples of different areas in Mosul city M.Sc. Thesis , This research 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 system was used for this purpose . A comparison between obtained results for both systems showed that for the average concentrations of radionuclide's ( 238U, 232Th, 40K , 226Ra and 214Pb) obtained from NaI(Tl) system of these samples was found to be 41.24Bq/kg,21.46Bq/kg , 326.74Bq/kg, 33.55 Bq/kg and 11.76Bq/kg respectively, while it was found that the average concentrations of the same natural radionuclide's obtained from HPGe system
From 2014 to 2016, The effect of gamma radiation and neutron beam on the electrical and optical properties of porous silicon -Ph.D. Thesis , Porous silicon layers (PSi) were prepared from p-type silicon wafer by using electrochemical cell with etching time 20 min, current 30 mA and fixed electrolyte solution HF:C2H5OH (1:4). The effect of increase of γ-ray intensity (50Gy and 100Gy) on the structural properties of porous silicon has been studied using SEM, AFM, XRD and Raman spectrum. The SEM images before irradiation shows high density and randomly distributed of pores that cover all of the surface which have different size and spherical shape. After irradiation by 50Gy, the pores seems more obvious, discriminate and larger diameters.
Experimental and theoretical Nuclear Physics
Radiation Physics
Semiconductor Radiation detectors
Nuclear Track Detectors
Quantum Physics
Elementary particle Physics
Journal Articles
" Measurement of natural radioactivity in brick samples used in the construction in Iraq",Archives of Physics Research, Scholars Research Library, 0976-0970, 6 (1), 2015, 13-19, Laith A. Najam, Nada F. Tawfiq and Shaher A. Younis
" Contribution of high energy configurations to longitudinal and transverse form factors in p- and sd-shell nuclei", Indian J Phys, Springer, 89(6), 2015, 611-618, F A Majeed and L A Najim
" Measuring radioactivity level in various types of rice using NaI (Tl) detector", American Journal of Engineering Research (AJER), 2320-0847, Volume-4, Issue-3, 2015, 126-132, Laith A. Najam, Nada F. Tawfiq and Fouzey H. Kitha
" Natural Radioactivity in Soil Samples in Nineveh Province and the Associated Radiation Hazards",International Journal of Physics, Science and Education Publishing, Vol. 3, No. 3, 2015, 126-132, Laith A. Najam, Shaher A. Younis, Fouzey H. Kithah
" Transfer factors of 40K, 226Ra, 232Th from soil to different types of local vegetables, radiation hazard indices and their annual doses", J Radioanal Nucl Chem, Springer, 302, 2014, 87-96, Ahmed K. Mheemeed • Laith A. Najam • Ali Kh. Hussein
" Radon emanation from drinking water samples of Nineveh province (IRAQ)", American Journal of Modern Physics, Science Publishing Group,2326-8891, 3(6), 2014,257-260, Laith Ahmed Najam, Nada Fathil Tawfiq, Enas Mohmad Younis
" The influence of gamma irradiation on the chemical and transport properties of porous silicon", Advances in Applied Science Research, Pelagia Research Library, 5(6), 2014, 218-223, Laith Ahmed Najam, Ismail Khalaf Abbas and Abd Ulkahliq Auob Sulaiman
" The Effect of Gamma Irradiation on the Structural Properties of Porous Silicon", International Journal of Physics, Science and Education Publishing, Vol. 3, No. 1, 2015, 1-7, Ismail Khalaf Abbas, Laith Ahmed Najam*, Abd UlKahliq AuobSulaiman
"A Comparative Study of the Results of Natural Radioactivity and the Associated Radiation Hazards of Na(Tl) and HPGe Detectors", International Journal of Recent Research and Review, 2277 – 8322,VIII, Issue2, 2015,1-9,Laith A.Najam,Nada F. Tawfiq ,Shaher A.Younis
"Estimation of Natural Radioactivity of Some Medicinal or Herbal Plants Used in Iraq",Detection, Vol.3, No.1, 2015,1-9, Laith A. Najam, Nada F. Tafiq, Fouzey H. Kitah
"Measurement of Uranium Concentrations, Radium Content and Radon Exhalation Rate in Iraqian Building Materials Samples",International Journal of Physics,Vol. 3, No. 4, 2015, 159-164, Abdalsattar K Hashim and Laith A. Najam
"Structure Evolution in Odd-Even Eu- 155 Nucleus within IBFM-2", American Journal of Modern Energy, 1(1), 2015, 17-24, Saad N. Abood, Mohamed Bechir Ben Hamida, Laith A. Najim
"Assessment of Natural Radioactivity Level in Soil Samples for Selected Regions in Nineveh Province (IRAQ)", International Journal of Novel Research in Physics Chemistry & Mathematics, 2(2),2015, 1-9, Laith A. Najam, Shaher A. Younis
"Radium and Uranium Concentrations Measurements in Vegetables Samples of Iraq", Detection,3(4), 21-28, Abdalsattar Kareem Hashim, Laith Ahmed Najam
"Analysis of Nuclear Track Parameters of CN-85 Detector Irradiated to Thermal Neutrons by Using MATLAB Program", Detection,3(4), 29-36, Hussain A. Al-Jobouri, Mustafa Y. Rajab, Laith A. Najam
"Alpha Radioactivity in Various Brands of Rice in Iraqi Market", International Journal of Environmental Monitoring and Protection,2(5), 2015, 70-75, Abdalsattar K. Hashim, , Laith A. Najam
"Measurement of Radon Gas Concentrations in Tap Water Samples for Thi-Qar Governorate Using Nuclear Track Detector (CR-39)", Detection, 4, 2016,1-8, Laith Ahmed Najam, Hazim Louis Mansour, Nada Fadhil Tawfiq, Mahmood Salim Karim
"A Study of Radon Concentration in Different Brands Tobacco Cigarette in Iraqi Market, Influencing Factors and Lung Cancer Risk", International Journal of Science and Technology, Volume 5 No.10, October 2015, Abdalsattar Kareem Hashim, , Laith Ahmed Najam, Lordford Tettey-Larbi
"Effective Radium Content and Radon Flux Determination in Cereals and Legumes Iraqian Products", Atti della “Fondazione Giorgio Ronchi, Anno LXX, 2015 - N. 6, ABDALSATTAR KAREEM HASHIM , LAITH AHMED NAJAM , RAMLA D. AL-ALAWY
"An IBM-2 Calculation of E2/M1 Multipole Mixing Ratios of Transitions in 90-96Sr",International Journal of Physics, Vol. 4, No. 1, 5-10, 2016, Saad Naji Abood, Laith Ahmed Najim
"Indoor Radon Concentration Measurement in Different Iraqi Radiation Locations", International Journal of Recent Research and Review, Vol. IX, Issue 1, March 2016, Ammar A. Battawy, Nada F. Tawfiq, Laith Ahmed Najam, Mohamad Suhaimi Jaafar, Iskandar Shahrim Mustafa
"Image Analysis of Cr-39 and Cn-85 Detector Irradiated by Thermal Neutron", International Journal of Recent Research and Review, Vol. IX, Issue 1, March 2016, Hussain A. Al-Jobouri, Laith Ahmed Najam, Mustafa Y. Rajab
"Study the Attenuation Coefficient of Granite to Use It as Shields against Gamma Ray", Detection Journal,Vol.4,No.2, 33-39, 2016, Laith Ahmed Najam, Abdalsattar Kareem Hashim, Hussein Abdulkareem Ahmed, Israa M. Hassan
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