Theoretical Atomic Physicist & Researcher
Aloka Kumar Sahoo (PhD)
Postdoctoral Researcher in Theoretical Atomic Physics
Helmholtz‑Institut Jena (HIJ), Germany
GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany
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Research Areas
Exploring the frontiers of theoretical physics through innovative research in Atomic physics.
Atomic Structure
Exploring relativistic effects and electron correlations in heavy atomic systems to understand spectroscopic properties, energy levels, and their implications for fundamental physics, including precision tests of quantum electrodynamics.
Electron-Atom Interactions
Investigating elastic and inelastic electron scattering from atoms and ions using the Relativistic Distorted Wave approximation to uncover interaction mechanisms, cross-section behaviors, and their relevance to plasma modeling and astrophysical phenomena.
Confined Atomic Systems
Studying electron scattering in confined systems like C60-fullerene to analyze quantum confinement effects, electron correlations, resonance phenomena, and their potential applications in different branches of physics.
Atomic Cascades
Performing atomic cascade calculations to understand energy transfer processes in highly excited systems, with applications in astrophysics, plasma physics, and the modeling of radiative processes in extreme environments such as neutron stars mergers.
Academic Background
My academic journey through prestigious institutions, building a strong foundation in theoretical physics.
Doctor of Philosophy in Physics
Indian Institute of Technology Roorkee, Roorkee, India
A comprehensive theoretical investigation into the atomic structure and electron interactions, focusing on heavy atomic systems with complex electronic configurations. The study includes both elastic scattering and electron impact excitation, employing a relativistic framework to handle the complexities of these systems. Additionally, the research explores the behavior of atomic systems under confinement, providing insights into how confinement affects electron interactions.
Master of Science in Physics
Indian Institute of Technology (ISM), Dhanbad, India
Professional Journey
My professional experience in academic research and scientific collaboration.
Postdoctoral Researcher
Helmholtz-Institut Jena, Jena, Germany
- Atomic structure calculations
- Electron-atom collision parameter calculations
- Mentor: Prof. Stephan Fritzsche
Guest Scientist
Helmholtz-Institut Jena, Jena, Germany
- Electron impact excitation of atoms and ions
- Continuum electron phase analysis in presence of atomic potential
- Mentor: Prof. Stephan Fritzsche
Academic Teaching
My experience in teaching and mentoring students in physics and related disciplines.
Teaching assistant for BTech first year PHN-008 (Electromagnetic Theory)
IIT Roorkee
- Graded assignments and provided detailed feedback
- Conducted tutorial sessions for undergraduate students
Lab instructor for BTech first-year Basic Physics lab
IIT Roorkee
- Provided guidance on data analysis and interpretation
- Conducted laboratory sessions for undergraduate students
Lab instructor for MSc second year PHN-643 (Numerical Analysis and Computer Programming) course
IIT Roorkee
- Provided hands-on experience with numerical methods and programming
- Conducted laboratory sessions for postgraduate students
Lab instructor for the PHN-103 (Computer Programming) course for BTech/Engineering Physics first-year students
IIT Roorkee
- Provided hands-on experience with scientific computing
- Conducted laboratory sessions for undergraduate students
Academic Publications
Featured research publications in high-impact journals, advancing our understanding of quantum physics and condensed matter systems.
Double to Tenfold M-shell Photoionization of Singly Charged Lanthanum Ions
M Looshorn, B Döhring, P Hillenbrand, M Martins, A Müller, S Reinwardt, J Seltmann, F Trinter, S Wang, AK Sahoo, S Fritzsche, S Schippers
The Astrophysical Journal 997(2): 199 (2026) DOI: 10.3847/1538-4357/ae3089
Empirical Atomic Data for Plasma Simulations
Stephan Fritzsche, Houke Huang, Aloka Kumar Sahoo
Plasma 9(1): 2 (2026) DOI: 10.3390/plasma9010002
Simulated Photoabsorption Spectra for Singly and Multiply Charged Ions
Stephan Fritzsche, Aloka Kumar Sahoo, Lalita Sharma, Stefan Schippers
Atoms 13(9): 77 (2025) DOI: 10.3390/atoms13090077
Inelastic scattering of vortex electrons beyond the Born approximation
Sophia Strnat, Jonas Sommerfeldt, Aloka Kumar Sahoo, Lalita Sharma and Andrey Surzhykov
J. Phys. B: At. Mol. Opt. Phys. 58: 075201 (2025) DOI: 10.1088/1361-6455/adc2bc
Theoretical Investigation on Vortex Electron Impact Excitation of a Mg Atom Confined in a Solid-State Environment
Sophia Strnat, Aloka Kumar Sahoo, Lalita Sharma, Jonas Sommerfeldt, Daesung Park, Christian Bick, Andrey Surzhykov
Atoms 13(3): 23 (2025) DOI: 10.3390/atoms13030023
Computation of effective collision strengths for plasma applications using JAC
Aloka Kumar Sahoo, Stephan Fritzsche, Lalita Sharma
European Physical Journal Plus 139: 986 (2024) DOI: 10.1140/epjp/s13360-024-05747-2
Electron impact excitation of bismuth
Aloka Kumar Sahoo, Lalita Sharma
Physica Scripta 99: 095410 (2024) DOI: 10.1088/1402-4896/ad6f51
Merits of atomic cascade computations
Stephan Fritzsche, Aloka Kumar Sahoo, Lalita Sharma, Zhongwen Wu and Stefan Schippers
European Physical Journal D 78(6): 75 (2024) DOI: 10.1140/epjd/s10053-024-00865-z
Electron-Impact Excitation of the λ190.8 nm and λ179.9 nm Intercombination Lines in the Tl⁺ Ion
Anna N Gomonai, Viktoria Roman, Aleksandr I Gomonai, Aloka Kumar Sahoo and Lalita Sharma
Atoms 10(4): 136 (2022) DOI: 10.3390/atoms10040136
Electron impact excitation of the Tl⁺ ion: resonance and cascade transitions
Viktoria Roman, Aleksandr I. Gomonai, Lalita Sharma, Aloka Kumar Sahoo and Anna N. Gomonai
J. Phys. B: At. Mol. Opt. Phys. 55: 165203 (2022) DOI: 10.1088/1361-6455/ac7924
Electron Impact Excitation of Extreme Ultra-Violet Transitions in Xe⁷⁺ – Xe¹⁰⁺ Ions
Aloka Kumar Sahoo, Lalita Sharma
Atoms 9(4): 76 (2021) DOI: 10.3390/atoms9040076
Positron Scattering from Pyridine and Pyrimidine
Nidhi Sinha, Aloka Kumar Sahoo and Bobby Antony
J. Phys. Chem. A 124(25): 5147 (2020) DOI: 10.1021/acs.jpca.0c02575
Global Academic Presence
Participating in and contributing to prestigious academic conferences and events around the world.
International Workshop on Atomic Physics (ATOM25)
Structured Light and Matter Workshop
24th National Conference on Atomic and Molecular Physics (NCAMP25)
9th Topical Conference on Ultrafast Photonics and Quantum Science
International School on Atomic and Molecular Data Evaluation and Curation (ISAMDEC)
23rd National Conference on Atomic and Molecular Physics (NCAMP23)
37th National Symposium on Plasma Science & Technology (PLASMA2022)
53rd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics (DAMOP 2022)
Recognition & Achievements
Recognition for contributions to the field of theoretical physics and academic excellence.
INSPIRE Scholarship for Higher Education (INSPIRE-SHE)
Department of Science and Technology, India, 2014–2019
Awarded prestigious INSPIRE-Scholarship for Higher Education (INSPIRE-SHE), Year 2014 – 2019 for being in top 1% in Higher secondary
Lifetime Member of ISAMP
Indian Society of Atomic and Molecular Physics (ISAMP), 2020
Lifetime member of the Indian Society of Atomic and Molecular Physics (ISAMP)
Graduate Aptitude Test in Engineering (GATE)
Indian Institute of Technology Madras (IIT Madras), 2019
Qualified Graduate Aptitude Test in Engineering (GATE), Year: 2019
Technical Expertise
Proficient in various programming languages and scientific computing tools essential for advanced physics research.
Programming Languages
Software & Tools
Operating Systems
- Debian
- Ubuntu
- Fedora
- Red Hat
- Windows
Scientific Computing
- NumPy, SciPy
- Plots.jl
Version Control
- Git, GitHub, GitLab
Visualization
- Plots.jl, Gnuplot, Matplotlib
Specialized Tools
Get in Touch
Interested in collaboration or have questions about my research? Feel free to reach out.
Contact Information
I'm interested in new collaborations and opportunities to discuss research. Please feel free to reach out if you have questions about my work or potential collaborations.
Atomic Physics Group
Room D205, Helmholtzweg 4
Helmholtz Institute Jena
Jena - 07743, Germany