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Professor: Department of Astronomy, Chemical
Physics Program, Interdisciplinary Biophysics Graduate Program
The Ohio State University, Columbus, Ohio, USA 43210
Director and Co-Founder: Indo-US Center for STEM Education and Research Email: pradhan.1@osu.edu, Phone: 614-292-5850 |
 CLICK HERE
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| This homepage reports interdisciplinary research by the OSU group, jontly with Sultana Nahar and several students, postdocs, and collaborators. Research interests are theoretical studies of radiative and collisional atomic processes, and spectral formation and opacities in astrophysical and laboratory plasmas - an integrated program of atomic physics, astrophysics, and plasma physics.
Helioseismic inference of the solar radiative opacity", Gael Buldgen, J-C Pain, P. Cosse, C. Blancard, F. Gilleron, Anil Pradhan, et al., Nature Commmunications, 16:693 (2025). Plasma effects on resonant phenomena", Anil Pradhan, Can. J. Phys. 103, 27 (2024). Interface of Equation-of-State, Atomic Data and Opacities in the Solar Problem" Anil K. Pradhan, MNRAS Letters, 527, L179 (2024). R-Matrix calculations for opacities: RMOP-I. Methodology and computations , A.K. Pradhan, S.N. Nahar and W. Eissner (J.Phys.B, 57, 125001, 2024) R-Matrix calculations for opacities.RMOP-II. Photoionization and oscillator strengths of iron ions FeXVII, FeXVIII and FeXIX, S.N. Nahar, L. Zhao, W. Eissner and A.K. Pradhan (J.Phys.B, 57, 125002, 2024) R-matrix calculations for opacities: RMOP-III. Plasma broadening of autoionizing resonances, A.K. Pradhan (J. Phys.B, 57, 125003, 2024) R-Matrix calculations for opacities: RMOP-IV. Convergence, completeness, and comparison of relativistic R-matrix and distorted wave calculations for FeXVII and FeXVIII, L. Zhao, S.N. Nahar and A.K. Pradhan (J. Phys.B, 57, 125004, 2024) Photoionization and Opacity , Anil Pradhan, Atoms 11, 52 (2023) Werner Eissner (1930-2022): A pioneer in Computational Atomic Physics, Anand K. Bhatia, Anthony E. Lynas-Gray, Claudio Mendoza, Sultana Nahar, Harry Nussbaumer, Anil K. Pradhan, Anthony M. Seaton, Gunter Wunner and Claude J. Zeippen, Atoms 1, 0 (2023) Plasma broadening of autoionizing resonances, Anil Pradhan, Astro-ph:arxiv.org/abs/2301.07734 Recalculation of astrophysical opacities: overview, methodology and atomic calculations , Anil Pradhan and Sultana Nahar, Proceedings of Workshop on Astrophysical Opacities, ASP Conf. Ser. 515, 79 (2018) Converged Close-Coupling R-Matrix calculations of Photoionization of Fe XVII in Astrophysical Plasmas: from Convergence to Completeness , Lianshui Zhao, Werner Eissner, Sultana Nahar and Anil Pradhan, Proceedings of Workshop on Astrophysical Opacities, ASP Conf. Ser. 515, 89 (2018) The IRON Project: Photoionization of Fe Ions, Sultana N. Nahar, Proceedings of Workshop on Astrophysical Opacities, ASP Conf. Ser. 515, 93 (2018) Comment by A.K. Pradhan on "Fe XVII opacity at stellar interior conditions" by C.A. Iglesias and S. Hansen (2017). Large enhancement in high-energy photoionization of FeXVII and missing continuum plasma opacity S.N. Nahar and A.K. Pradhan, Phys. Rev. Letts., 116, 235003 (2016). Reply to Comment by Blancard et al. (2016) , Sultana N. Nahar and Anil K. Pradhan, Phys. Rev. Letts. 117, 249502 (2016). A higher-than-predicted measurement of iron opacity at solar interior temperatures" , J.E. Bailey et al. (22 authors including Sultana N. Nahar, Anil K. Pradhan and C. Orban from OSU), Nature 517, 56 (2015). Highly Excited Core Resonances in Photoionization of Fe XVII : Implications for Plasma Opacities , Sultana N. Nahar, Guoxin Chen, Werner Eissner, Anil K. Pradhan, Phys. Rev. A 83, 032417 (2011). Opacities for stellar envelopes , M.J. Seaton, Y. Yu, D. Mihalas and Anil K. Pradhan, Mon. Not. Roy. Astr. Soc. 266, 805 (1994).
Biosignature Line Ratios of [P II] in Exoplanetary and Nebular Environments, Kevin Hoy, Sultana Nahar & Anil Pradhan, MNRAS, 521, L48 (2023). Astro-ph:arxiv.org/abs/2301.07736 Collision strengths for FIR and UV transitions in PIII and the phosphorus abundance , Rahla Naghma, Sultana N Nahar and Anil K Pradhan, Mon. Not. Roy. Soc. Letters, 479, L60 (2018). Monte Carlo Simulations of Biophysical Factors for Viability of Life in Exoplanetary Atmospheres" , Maximililian Westphal and Anil Pradhan, Workshop on Astrophysical Opacities , Aug. 1-4, 2017, Western Michigan University, Kalamazoo, MI.
``World Class STEM Faculty: An International Dual-Degree Program", Karen E. Irving, Anil K. Pradhan and Sultana N. Nahar, Book Chapter in "Recruiting, Preparing, and Retaining stem Teachers for a Global Generation", 217-240, 2019, Publ: Brill Sense (Leiden, Boston), Eds: J. Leonard, A.C. Burrows and R. Kitchen, ISBN: 978-90-04-39998-3 (paperback), 978-90-04-39997-6 (hardback), 978-90-04-39999-0 (e-book).
Interdisciplinary program in biophysics: Computational Nanoscience and Biomedical X-ray Spectroscopy. Researchers include Max Westphal (Biophysics Graduate Program), Sultana Nahar (Astronomy), Chris Orban (Physics), Russell Pitzer (Chemistry), Enam Chowdhury (Physics), Sara Lim (Medical College of Wisconsin)) Recent developments entail theoretical and experimental studies to implement a new methodology, RESONANT NANO-PLASMA THERANOSTICS , based on the use of monochromatic X-ray sources for imaging, therapy and diagnostics (theranostics) in cancer research, as reported in the following news items.
2. X-ray researchers turn focus from black holes to cancer:
International team leverages resources of Ohio Supercomputer Center
3. Tailored X-rays for cancer, news story published in
Nature-India, 29 November 2009.
4. FROM ASTROPHYSICS TO BIOMEDICINE VIA NANOTECHNOLGY (In OSUToday)
This homepage is also intended as a guide to recommended
ATOMIC DATA
for astrophysical and laboratory applications. In addition, the database
Nahar OSU
Radiative Data (NORAD) contains a large number of datafiles for
energy levels, transition probabilities, photoionization cross sections,
and total and partial (electron+ion) recombination rate coefficients
(including radiative and dielectronic recombination processes in a
unified and ab initio manner using the R-matrix method).
The radiative data supercede earlier TOPbase data.
Revised Jan 19, 2023
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