Dr. Upadhyay has been working as a lecturer of physics at the Department of Physics, Institute of Science and Technology, Tribhuvan University, Nepal, since May 7, 2017. He is teaching and supervising research work (project work, term papers, and theses) to B.Sc. and M.Sc. students.

Research Interests in:

*Naturally Occuring Radioactive Materials

*Radiation Protection

*Monte Carlo Methods

*Non-Destructive Testing (NDT)

*Accelerator Physics

Skills 

Experimental

• Gamma Spectroscopy
• Energy Dispersive X-ray Fluorescence (EDXRF)
• Field Emission Electron Microscope-Energy Dispersive X-ray Spectroscopy (FESEM-EDS)
• Fourier Transform Infrared (FTIR) spectroscopy
• Microwave Plasma Atomic Emission Spectroscopy (MP-AES)
• X-ray Diffraction (XRD)
• High-Performance Liquid Chromatography (HPLC)

Computational

*Python Programming

*Geographic Information System (GIS) 

*Particle and Heavy Ion Transport code System (PHITS)

*Fortran 

*Penelope User-Friendly Fast Interface (PUFFIn)

*Scientific Documentation Using LaTeX

Vocational

*Radiography Testing (Film and Digital)

*Ultrasonic Testing

*Phased Array Ultrasonic Testing

*Magnetic Particle Testing

*Liquid Penetrant Testing

Awards/Grants

• *PI: India Science and Research Fellowship (ISRF) 2024-25 under Indian National Science Academy, Department of Science and Technology (DST), Govt. of India Project No. INSA/DST-ISRF/2024/27

• *Prof. Dr. Shankar Prasad and Sudakshina Pradhan Award 2025 for being the best Physics Ph.D. Scholar of the year 2025 from Nepal Physical Society on the occasion of its 41st Annual General Meeting on July 5, 2025.

• *IEEE NPSS Early Career award grant to attend and present paper at the 15th International Particle Accelerators Conference May 19-24, 2024, Nashville, TN, United State

• *PI: PhD Fellowship and Research Support from University Grants Commission (UGC), Nepal Category A, 17 August, 2022 Award Number: PhD 78/79-S&T-14

• *IAEA fellowship under the IAEA’s technical cooperation programme for Training on Industrial NDT methods at different times

• *PI: Small Research Development and Innovation Grant Award from UGC, Sanothimi, Bhaktapur, Nepal, 2019. Award Number: SRDIG-75/76-S&T-10

• *Travel Grant for presentation at XXXth IAU GA - 2018 from UGC, Sanothimi, Bhaktapur, Nepal, 2018

Collaborators/Collaborations

• *Dr. José A. Jiménez, Center for Advanced Materials Science, Department of Biochemistry, Chemistry & Physics, Georgia Southern University, Statesboro, GA 30460, USA
• *Dr. Suffian Mohamad Tajudin, Faculty of Health Sciences, Universiti Sultan Zainal Abidin (UniSZA), Kuala Nerus, 21300, Terengganu, Malaysia
• *Dr. Dibyaranjan Rout, Functional Materials Lab, Dept. of Physics, School of Applied Sciences, Kalinga Institute of Industrial Technology (KIIT) Deemed to be University, Bhubaneswar, 751024, Odisha, India
• *Dr. Buddha Ram Shah, Nepal Academy of Science and Technology, Khumaltar, Lalitpur 44700, Bagmati, Nepal

Country Traveled:

Austria, India, Malaysia, Japan, Slovakia, South Korea, Thailand, United Arab Emirates and United States of America

Ph.D. (Physics: Nuclear Physics), Central Department of Physics (CDP), Institute of Science and Technology (IoST), Tribhuvan University (TU), Kirtipur, Kathmandu, Nepal, March 31, 2026, with Dissertation: “Radioactivity and Radiation Transport Phenomena in Construction Materials and Natural Rocks." under the supervision of Prof. Dr. Raju Khanal

Professional Qualifications

1. Non-Destructive Testing (NDT) Digital Radiography Testing Level 3 Welded Construction, Casting and Forging from Malaysian Skill Certification (Non-Destructive Programme), Department of Skill Development, Malaysia, 2022, 2024, under the support of International Atomic Energy Agency (IAEA)

2. NDT RT-Digital, RT-Film Based, MPT, UT, LPT Level 2 ISO 9712 Certification: Welded Construction, Casting and Forging from Malaysian Skill Certification (Non-Destructive Programme), Department of Skill Development, Malaysia, 2022, 2024, under the support of IAEA

1. Lecturer (Permanent Position) of Physics at Amrit Campus, Institute of Science and Technology, Tribhuvan University, Kathmandu, Nepal since May 7, 2017

2. Teaching Assistant of Physics for B.Sc. level at Kailali Multiple Campus, Institute of Science and Technology, Tribhuvan University, Dhangadhi, Kailali, from academic year 2015 to 2017

3. Associate Member since 2025: The American Society for Nondestructive Testing (ASNT), Membership Number: 391683

4. Student Member since 2024: Institute of Electrical and Electronics Engineers (IEEE), IEEE Electron Devices Society and Nuclear & Plasma Sciences Society; Membership Number: 99836921

5. Executive Member: Nepal Physical Society, 2017 – 2019

6. Life Member since 2016: Nepal Physical Society

Experiences (Courses taught with code number in list):

B.Sc.

*Optics (PHY201)

*Classical Mechanics (PHY301)

*Space Science (PHY304)

*Project Work (PRO406)

*Physics Laboratory (PHY302, PHY404)

M.Sc.

* Quantum Mechanics I (PHY503)

* Quantum Mechanics II (PHY551)

* Quantum Field Theory  (PHY601)

* Astrophysics I (PHY612)

* Astrophysics II (PHY662)

* Computational Physics Lab (PHY604)

*Term Paper (PHY605, PHY654)

International

1. Khatri, B. V., Shah, B. R., Upadhyay, D. R., Subedi, P., Kalakhety, H., & Khanal, R. (2026). Radiological assessment of natural radioactivity in river sediments along the Kaligandaki River at Jomsom Area, Nepal. Applied Radiation and Isotopes, 234, 112641 https://doi.org/10.1016/j.apradiso.2026.112641 
2. Khatri, B. V., Upadhyay, D. R., Kalakhety, H., Niraula, O. P., & Khanal, R. (2026). Baseline Radiological Survey for Radiation Protection from Kushma to Galeshwor along the Kaligandaki River, Nepal. Journal of Radiation Protection and Research, 51(1), 27-38. https://doi.org/10.14407/jrpr.2025.00304 
3. Upadhyay, D. R., Khatiwada, L. N., Sunar, R., Praharaj, S., Rout, D., & Khanal, R. (2026). Elemental, morphological and radiation-protective nature of selected low-cost construction materials: Experimental, theoretical and PHITS simulation. Radiation Physics and Chemistry, 244, 113801. https://doi.org/10.1016/j.radphyschem.2026.113801
4.  Upadhyay, D. R., Bhandari, U. B., Ghorasainee, P., & Khanal, R. (2026). Radiation Shielding Properties of Manganese (II) Oxide and Neodymium (III) Oxide-Doped Barium Phosphate Glasses: Analytical Evaluation and PHITS Simulations. Nuclear Physics A, 1068, 123324. https://doi.org/10.1016/j.nuclphysa.2026.123324
5. Upadhyay, D. R., Jiménez, J. A., & Khanal, R. (2025). Eco-friendly lead-free Yb2O3 doped transparent phosphate glasses for radiation shielding applications. Physica Scripta, 100(7), 075311. https://doi.org/10.1088/1402-4896/ade7c7
6. Upadhyay, D. R., Bhatta, J. R., Khatri, B. V., Shah, B. R., Tajudin, S. M., & Khanal, R. (2025). Natural radionuclide concentrations in rock samples from central and far-western Nepal with associated radiological hazards. Journal of Radioanalytical and Nuclear Chemistry, 1-16. https://doi.org/10.1007/s10967-025-10154-7
7. Upadhyay, D. R., Shah, B. R., Tajudin, S. M., & Khanal, R. (2025). Investigation of natural radionuclide and associated radiological parameters of selected construction materials used in Nepal. Environmental Monitoring and Assessment, 197(6), 1-17.  https://doi.org/10.1007/s10661-025-14099-y
8. Jiménez, J. A., Upadhyay, D. R., Amesimenu, R., & Khanal, R. (2025). Spectroscopic, calorimetric, and radiation shielding analysis of lead-free transparent dysprosium-doped phosphate glasses. Ceramics International, 51(4), 4904-4917. https://doi.org/10.1016/j.ceramint.2024.11.463
9. Khanal, M., Acharya, A., Maharjan, R., Upadhyay, D. R., Dhobi, S. H., Shah, B. R., Adhikari, R., Mulmi, D. D., Lamichhane, T.R.  & Lamichhane, H. P. (2024). Investigation of naturally occurring radionuclides in selected medicinal plants and associated soils, and calculation of soil-to-plant transfer factors. Journal of Environmental Radioactivity, 280, 107556. https://doi.org/10.1016/j.jenvrad.2024.107556 
10. Dulal, A., Upadhyay, D. R., Tajudin, S. M., & Khanal, R. (2024). Behavior of silver tellurite glasses against gamma rays, neutrons, and ions using theoretical and the PHITS Monte Carlo method. Materials Research Express, 11(7), 075202. https://doi.org/10.1088/2053-1591/ad63fe
11. Upadhyay, D. R., Phuyal, A., Tajudin, S. M., & Khanal, R. (2024). Assessment of natural radioactivity levels and hazard indicators in Tarakeshwor Municipality, Nepal through in-situ technique and multivariate analysis. Heliyon, 10(10) e30822. https://doi.org/10.1016/j.heliyon.2024.e30822 
12. Upadhyay, D. R., Koirala, G., Shah, B. R., Tajudin, S. M., & Khanal, R. (2024). Assessing radioactive contaminants in Kathmandu soils: measurement and risk analysis. Environmental Monitoring and Assessment, 196(2), 190. https://doi.org/10.1007/s10661-023-12284-5
13.  Upadhyay, D. R., Tajudin, S. M., & Khanal, R. (2023). Radiation attenuation and photon trajectories behaviors of quadruple glass system: 60SiO₂-35Pb₃O₄-(5-x)ZnO-xWO₃.. Ceramics International, 49(14), 23118-23128. https://doi.org/10.1016/j.ceramint.2023.04.140
14. Upadhyay, D. R., Khanal, L., Hamal, P., & Aryal, B. (2018). Dust Structure around Asymptotic Giant Branch Stars. Proceedings of the International Astronomical Union, 14(S343), 525-526. https://doi.org/10.1017/S1743921318007858

For more detail: ORCID