Laith Ahmed Najam

@uomosul.edu.iq

Physics Dept, College of Science
University of Mosul

Laith Ahmed Najam


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https://researchid.co/ph._2007
Prof. Dr. Laith Ahmed Najam
Nuclear Physics and Radiation Physics
Physics Department, Mosul University, Iraq
Full Professor
E-mail: , laith_najam@

Research fields:
Nuclear Physics
Radiation Physics
Semiconductor Radiation Detectors
B.Sc. Physics (1987) Mosul University-IRAQ
85.7% the second in the first in the Physics Dept.
M.Sc. in Nuclear Physics (1990) Mosul
81% the First in the Dept.
M.Sc. Thesis under Title:
((A Study of the decay Scheme and the Nuclear structure of Dy-
160 ))

Ph.D. in Nuclear Physics (2006) Mosul
Ph.D. thesis under Title:
((The Fabrication of Nuclear Detector from Semiconductor Material))

Assistant lecture (1991)
Lecture ((1997))
Assistant Prof. ((2001)
Prof. ((2012))
Subject that has been taught
1) Nuclear Physics for the fourth class
2) Elementary particles for the third class
3) Nuclear reactors as selective subject for Fourth Class
4) Plasma Physics as selective subject for Fourth Class
5) Radioactive contamination as selective subject for Fourth Class
6) General Physics for First Class
7) Medical Physics For Student of Technical Student First Class
8) Radiation Physics For Student of Technical Student Fourth class
9) Advance Nuclear Physics for M.Sc. students
10) Detectors and interaction with radiation for Fourth class
11) Selective Subject (Neutron Physics) for Ph.D. Student
12) Environmental pollution for M.Sc. Students
13) Spectroscopy analysis for Ph.D. Students

EDUCATION

Ph.D. In Nuclear Physics

RESEARCH, TEACHING, or OTHER INTERESTS

Physics and Astronomy, Nuclear and High Energy Physics, Radiation, Atomic and Molecular Physics, and Optics
89

Scopus Publications

1710

Scholar Citations

24

Scholar h-index

58

Scholar i10-index

Scopus Publications

RECENT SCHOLAR PUBLICATIONS

  • Comparative study of gamma ray and neutrons radiation effects on MOS structure
    ZN Hamoo, LA Najam, LMAL Taan
    AIP Conference Proceedings 3408 (1), 070037 , 2026
    2026
  • Development and gamma radiation shielding assessment of Bi2O3-modified phosphate–borate glasses using experimental and theoretical approaches
    UR Madlool Mohammed Al Suwaifi, Shareef Faiq Sultan Al-Tikrity, Laith Ahmed ...
    Eur. Phys. J. Plus 141, 543 , 2026
    2026
  • Assessment of radiological health effects of radon and toxic heavy metal concentrations in imported coffee samples consumed in Iraqi Kurdistan region, Iraq
    A Farhan, SQ Othman, ZA Hussein, LA Najam, YA Baqir, TY Wais, ...
    Scientific Reports , 2026
    2026
  • High-performance epoxy–Bi2O3 composites for gamma radiation shielding: experimental and MCNP-based evaluation
    HM Taha Yaseen Wais , Laith Ahmed Najam , Khaled W. Yahya , Edrees E ...
    Inorganic Chemistry Communications 188, 116629 , 2026
    2026
  • Radiological health risk assessment of NORMs, 7Be and 137Cs in dust storm fallout from Kirkuk, Northern Iraq
    TY Wais, BF Namq, SQ Othman, LA Najam, M Živković, MA Najemalden, ...
    The European Physical Journal Plus 141 (4), 367 , 2026
    2026
    Citations: 1
  • Estimation of some Genetic Parameters in Potato (Solanum tuberosum L.) under Effect of Gamma Rays
    MM Saleh, SY Hassan, LA Najam
    2026
  • Study of the alloy’s Al-Cu-PbxZn 10-x performance in attenuating gamma rays
    AMA Ismail, MA Hmood, LA Najam
    AIP Conference Proceedings 3486 (1), 020001 , 2026
    2026
  • Experimental radiation shielding investigation of the holmium oxide effects on GTB glass system
    MA Taha Yaseen Wais , Shams A.M. Issa , M.I. Sayyed , Laith Ahmed Najam ...
    Applied Radiation and Isotopes 233, 112587 , 2026
    2026
  • Estimation of some Genetic Parameters in Potato (Solanum tuberosum L.) under Effect of Gamma Rays
    LAN Shamil Y. Hassan Maher M. Saleh
    Rafidain Journal of Science 35 (1), 9-20 , 2026
    2026
  • Experimental case study of radiation shielding features of germanate-tellurite-borate glass system contains CeO 2
    KM Kaky, MY Hanfi, TY Wais, MI Sayyed, AJ Kadhim, LA Najam, ...
    Radiochimica Acta , 2026
    2026
  • Influence of high-Z oxide content on gamma-ray attenuation in tellurite–molybdate glass matrices
    MIS Laith Ahmed Najam , Berivan F. Namq , Taha Yaseen Wais, Mohamed Y. Hanfi ...
    Applied Radiation and Isotopes 231, 112517 , 2026
    2026
    Citations: 1
  • Environmental radiological evaluation of North and South industrial zones of Erbil city in terms of radon and gamma radiation levels from soils surface by using monte carlo …
    SQOTYWBFNTALANRSSMJMI Sayyed
    Environ Geochem Health 48, 168-189 , 2026
    2026
    Citations: 1
  • Praseodymium oxide effects on radiation shielding features of tellurite-germanate-borate glass: experimental investigation
    AJKMA Kawa M. Kaky, M. I. Sayyed, K. A. Mahmoud, Taha Yaseen Wais, Laith ...
    Radiochim , 2026
    2026
  • Praseodymium oxide effects on radiation shielding features of tellurite-germanate-borate glass: experimental investigation
    KM Kaky, MI Sayyed, KA Mahmoud, TY Wais, LA Najam, A Jawad Kadhim, ...
    Radiochimica Acta , 2026
    2026
  • Study of the Efficiency of some Quaternary Alloys (Al-Cu-Pb-Zn) in Attenuating Gamma Radiation.
    LA Najam, AMA Ismail, MA Hmood
    2025
  • Effect of Gamma Rays on the Induction and Growth of Portulaca Olereacea Callus and it’s Relationship with the Content of Active Compounds in it.
    NAN Al-Rashedy, YS Rammah
    2025
  • Evaluation of natural radioactivity and radiological hazard effects for some brands of powdered milk that are available in Iraqi markets
    LAN Zainab N. Hamoo , Duha Hashim Al Refaei
    Eur. Phys. J. Plus 140, 1255 , 2025
    2025
  • The Influence of MgO/B 2 O 3 Substitution on Gamma Radiation Shielding Efficiency in TeO 2 -GeO 2 Glasses: An Experimental Study: Sayyed, Najam, Hanfi, Wais …
    MI Sayyed, LA Najam, MY Hanfi, TY Wais, AJ Kadhim, BF Namaq, ...
    JOM 77 (12), 9990-10000 , 2025
    2025
    Citations: 3
  • Impact of MoO 3 on gamma radiation shielding performance of B 2 O 3 –TeO 2 –GeO 2 –MgO glasses: experimental investigation
    MI Sayyed, MY Hanfi, BF Namaq, LA Najam, TY Wais, AJ Kadhim, ...
    Discover Materials , 2025
    2025
  • Experimental investigation on tuning radiation shielding competence in magnesium-germanium-boro-tellurite glasses modified with PbO
    YM M.I. Sayyed , Laith Ahmed Najam , Manjunatha , Taha Yaseen Wais , Abed ...
    Results in Materials 28, 8 , 2025
    2025
    Citations: 6

MOST CITED SCHOLAR PUBLICATIONS

  • Assessment of Annual effective Dose for Different Age Groups based on Radon Concentrations in the Groundwater of Qassim, Saudi Arabia
    HAABM Atef El-Taher, Ali Abid Abojassim, Laith Ahmed Najam
    Iranian Journal of Medical Physics 17 (1), 15-20 , 2020
    2020
    Citations: 56
  • Radon concentration in some building materials in Iraq using CR-39 track detector
    LA Najam, NF Tawfiq, RH Mahmood
    International Journal of Physics 1 (3), 73-76 , 2013
    2013
    Citations: 55
  • Radiological hazard assessment of soil from Kasik oil refinery, Nineveh, Iraq
    MI Sayyed, ZM Maria, ZA Hussein, LA Najam, BF Namq, TY Wais, ...
    Nuclear Engineering and Technology 56 (11), 4782-4790 , 2024
    2024
    Citations: 54
  • Natural radioactivity in soil samples in Nineveh Province and the associated radiation hazards
    LA Najam, SA Younis, FH Kithah
    Int J Phys 3 (3), 126-32 , 2015
    2015
    Citations: 54
  • Assessment of natural radioactivity and radiological hazards of soil collected from rabia town in nineveh governorate (North Iraq)
    HMMYAM Taha Yaseen Wais, Farah Nathim Mohammed Ali, LaithANajam
    Physics Scripta 98, 065304 , 2023
    2023
    Citations: 49
  • Radium and uranium concentrations measurements in vegetables samples of Iraq
    AK Hashim, LA Najam
    Detection 3 (04), 21-28 , 2015
    2015
    Citations: 49
  • Assessment of natural radioactivity level in soil samples for selected regions in Nineveh Province (Iraq)
    LA Najam, SA Younis
    Int J Novel Res Phys Chem Math 2 (2), 1-9 , 2015
    2015
    Citations: 45
  • Natural radioactivity levels of limestone rocks in northern Iraq using gamma spectroscopy and nuclear track detector
    L Najam, F AL-Jomaily, E AL-Farha
    Journal of radioanalytical and nuclear chemistry 289 (3), 709-715 , 2011
    2011
    Citations: 43
  • Assessment of natural radioactivity and its radiological risks in the soil of local government areas (Asa, Ilorin East, Ilorin South, Irepodun, Moro, and Oyun) in Kwara State …
    TYW Adegbulugbe Samuel Kanmi , Umaru Ibrahim , N.G. Goki , U. Rilwan ,, M.I ...
    Case Studies in Chemical and Environmental Engineering 11, 101040 , 2024
    2024
    Citations: 41
  • Evaluation of radiological risks due to natural radionuclides in the soil of Khanaqin district, Diyala, Iraq
    HMUR Berivan F Namq , ZakariyaAHussein, Sardar Qader Othman , Laith Ahmed ...
    Physics Scripta 100, 015310 , 2025
    2025
    Citations: 36
  • Activity Concentration of Natural Radionuclides in Sediment of Tigris River in the City of Mosul, Iraq
    LAN Taha Yaseen Wais
    Journal of Physics: Conference Series 199, 012064 , 2021
    2021
    Citations: 36
  • Uranium isotopes concentrations in surface water samples for Al-Manathera and Al-Heerra regions of An-Najaf, Iraq
    AA Abojassim, HAU Mohammed, LA Najam, A El-Taher
    Environmental earth sciences 78 (5), 132 , 2019
    2019
    Citations: 34
  • The effect of gamma irradiation on the structural properties of porous silicon
    JK Abbas, LA Najam, AU AuobSulaiman
    Int. J. Physics 3 (1), 1-7 , 2015
    2015
    Citations: 34
  • Study the Attenuation Coefficient of Granite to Use It as Shields against Gamma Ray
    IMH Laith Ahmed Najam, Abdalsattar Kareem Hashim, Hussein Abdulkareem Ahmed
    Detection 4, 33-39 , 2016
    2016
    Citations: 32
  • Estimation of soil-to-plant transfer factor across six local government areas of Kwara state, Nigeria
    LAN Adegbulugbe Samuel Kanmi , Umaru Ibrahim , N.G. Goki c U. Rilwan , M.I ...
    Journal of Environmental Radioactivity 280, 107548 , 2024
    2024
    Citations: 30
  • Evaluation of Natural Radionuclide content in Nile River Sediments and Excess Lifetime Cancer Risk Associated with Gamma Radiation
    MAAO Atef El-Taher , Laith Ahmed Najam , Imad Hussian
    Iranian Journal of Medical Physics 16 (1), 27-33 , 2019
    2019
    Citations: 29
  • Transfer factors of 40 K, 226 Ra, 232 Th from soil to different types of local vegetables, radiation hazard indices and their annual doses
    AK Mheemeed, LA Najam, AK Hussein
    Journal of Radioanalytical and Nuclear Chemistry 302 (1), 87-96 , 2014
    2014
    Citations: 29
  • Natural and artificial radioactivity levels in the agricultural soil of lands near the Al‑Kasak oil refinery, northern Iraq
    TYWBFNLANHNBKAMGHMMYA Mostafa
    Journal of Radioanalytical and Nuclear Chemistry 334 (2), 1471–1484 , 2025
    2025
    Citations: 28
  • Radiological hazard assessment of radionuclides in sediment samples of Tigris river in Mosul city, Iraq
    LA Najam, TY Wais
    Arab Journal of Nuclear Sciences and Applications 55 (1), 45-52 , 2022
    2022
    Citations: 28
  • Estimation of natural radioactivity of some medicinal or herbal plants used in Iraq
    LA Najam, NF Tafiq, FH Kitah
    Detection 3 (1), 1-7 , 2015
    2015
    Citations: 26

Publications

1. Hashim, A.K., Najam, L.A., Ashour, N.I., et al. Uranium Concentration, Effective Radium Content and Radon Exhalation Rate
Estimation for different Tea Brand Samples in Iraqi Market, Plant Archives Vol. 19 No. 1, 2019 pp. 407-412.
2. Abojassim, A.A., Mohammed, H.AU., Najam, L.A. et al. Uranium isotopes concentrations in surface water samples for Al-Manathera and Al-Heerra regions of An-Najaf, Iraq, Environ Earth Sci (2019) 78: 132. .
3. Hashim AK, Najam LA, Mohammed EJ, Hameed AS. Estimation of Radon Exhalation Rate, Radium Activity and Uranium Concentration in Biscuit Samples in Iraq. Iran J Med Phys 2019; 16: 152-157. 10.22038/.
4. Hussain A. Al-Jobouri, Fala H. Taha, Laith Ahmed Najam and Wijdan Thamer Faaz, Determination the Effect of Gamma Radiation on (CR-39, CN-85) Detectors by Using of Penetration of (He-Ne) Laser Beam, Research Journal of Applied Sciences 14 (1): 45-48, 2019.
5. El-Taher A, Najam LA, Hussian I, Omer MAA. Evaluation of Natural Radionuclide content in Nile River Sediments and Excess Lifetime Cancer Risk Associated with Gamma Radiation. Iran J Med Phys 2019; 16: 27-33. 10.22038/.
6. Hussain Ali Al-Jobouri, Wijdan Thamer Faaz, Laith A. Najam, Effect of Ultraviolet Radiation on CN-85 and CR-39 Detectors by UV-Visible Spectroscopy and (He-Ne) Laser Penetration Techniques, Asian Journal of Chemistry, Vol. 30, No. 9 (2018), 2075-2078, DOI: 10.14233/.
7. Laith A. Najam, Sameera A. Ebrahiem, Shaemaa A. Abbas Hind A. Mahdi, Assessment of Radon Gas Concentrations Levels and Radiation Hazards in the Dwellings of Baghdad Province, Iraq, Rasayan J. Chem., 2018, 11 (1), 37-40, DOI: 10.7324/.
8. Atef El-Taher, Laith Ahmed Najam, Afrah Hassoon Oraibi, Matthew Omoniyi Isinkaye, Effect of Cement Factory Exhaust on Radiological Contents of Surrounding Soil Samples in Assuit Province, Egypt, Journal of Physical Science, 2017, 28 (3), 137–150, DOI: 10.21315/.
9. Liath Ahmed Najam, Taghreed Khalid Hameed, Ahmed Obeed Farhan, Assessment of Radon Gad Concentrations Levels and Hazards Indices in Houses of Wassit Province-Iraq, Rasayan J. Chem., 2017, 10 (4), 1311-1315, DOI: 10.7324/.
10. Liath Ahmed Najam, Hazim Louis Mansour, Nada Fadhil Tawfiq, Mahmood Salim Karim, Measurement of Radon Gas Concentrations in Tap Water Samples for Thi-Qar Governorate Using Nuclear Track Detector (CR-39), Detection, 2016, 4, 1-8, 10.4236/.
11. Laith Ahmed Najam, Hazim Louis Mansour, Nada Fathil Tawfiq and Mahmood Salim Karim, Measurement of Radioactivity in Soil Samples for Selected Regions in Thi-Qar Governorate-Iraq, Journal of Radiation and Nuclear Applications, 2016, 1, 25-30.
12. Muataz A. Majeed, Ghasan Adnan Naeem, Laith Ahmed Najam, Attenuation of X-ray Fluorescence by Cadmium Compounds (CdSO4, CdCl2, CdO), International Journal of Advanced Research in Physical Science (IJARPS), Volume 3, Issue 8, 2016, PP 1-4.
13. Laith Ahmed Najam, Mahmood Salim Karim, Taghreed Khalid Hameed, Measurement of Radon Gas Concentration in Tap Water Samples in Wassit Governorate by Using Nuclear Track Detector (CR-39), International Journal of Physics, 2016, 4 (5), 119-122, DOI: 10.12691/ijp-4-5-1.
14. Ruqaya Jabir Hadi, Ali Abid Abojassim, Laith Najam, Radial Atomic Properties of Excited States for Beryllium Atom (1s2 2s ns) (1s), American Journal of Modern Energy, 2016, 2(1), 1-4, 10.11648/j..
15. Hussain A. Al-Jobouri, Laith Ahmed Najam, Mustafa Y. Rajab, 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.
16. Laith Ahmed Najam, Abdalsattar Kareem Hashim, Hussein Abdulkareem Ahmed, Israa M. Hassan, Study the Attenuation Coefficient of Granite to Use It as Shields against Gamma Ray, Detection, 2016, 4, 33-39, 10.4236/.
17. Ammar A. Battawy, Nada F. Tawfiq, Laith Ahmed Najam, Mohamad Suhaimi Jaafar, Iskandar Shahrim Mustafa, Indoor Radon Concentration Measurement in Different Iraqi Radiation Locations, International Journal of Recent Research and Review, Vol. IX, Issue 1, March 2016.
18. Saad Naji Abood, Laith Ahmed Najim, An IBM-2 Calculation of E2/M1 Multipole Mixing Ratios of Transitions in 90-96Sr, International Journal of Physics, 2016, Vol. 4, No. 1, 5-10. DOI: 10.12691/ijp-4-1-2.
19. ABDALSATTAR KAREEM HASHIM, LAITH AHMED NAJAM, RAMLA D. AL-ALAWY, Effective Radium Content and Radon Flux Determination in Cereals and Legumes Iraqian Products, Estratto da: Atti della Fondazione Giorgio Ronchi, Anno LXX, n. 6 - 11-12, 2015, http ://.