Dr. Hari Varma

Dr. Hari Varma
Phone : 01905-237929
EMail : hari[at]iitmandi[dot]ac[dot]in
Address : School of Basic Sciences
IIT Mandi, PWD Rest House 2nd floor,
near Bus Stand, Mandi - 175001
India

Research interests

  • Photoionization studies of many-body systems
  • Photoionization studies of atoms trapped in fullerene cage
  • Above threshold ionization studies (ATI) of atoms under ultra-intense x-ray radiation

Education

  • PH.D. from I.I.T. Madras, Chennai(2008)

Books

  • Hari R Varma and P. C. Deshmukh. Photoabsorption processes in some free and confined atomic systems: Effects of Correlation, Relativistic Interactions and Confinement. In Lambert Academic Publishing,Germany, 2011.

Publications in referred international journals

  • Controlling x-rays with light: ultrafast transparency,
    T. E. Glover, M. P. Hertlein, S. H. Southworth, T. K. Allison, J. van Tilborg, E. P. Kanter, B. Krässig, H. R. Varma, B. Rude, R. Santra, A. Belkacem, and L. Young Nature Physics 6, 69(2010).
  • Above-threshold ionization in the x-ray regime,
    Hari R. Varma, Marcelo F. Ciappina, Nina Rohringer, Robin Santra Phys. Rev. A 80, 053424(2009).
  • X-ray-absorption near-edge structure of laser dressed neon,
    Hari R. Varma, Lin Pan, Donald R. Beck, Robin Santra, Phys. Rev. A 78, 065401(2008).
  • Theoretical and experimental demonstration of the existence of quadrupole Cooper minima,
    P. C. Deshmukh, T. Banerjee , H. R. Varma, O. Hemmers, R. Guilllemin, D. Rolles, A. Wolska, S. W. Yu, D. W. Lindle, W. R. Johnson and S. T. Manson, J. Phys. B: At. Mol. & Opt. Phys. (Fast Track) 41, 021002(2008).
  • Confinement, correlation and relativistic effects on the photoionization of 6s subshell of Hg,
    H. R. Varma, Tanima Banerjee, S. Sunilkumar, P.C. Deshmukh, S. T. Manson and V. Dolmatov. Journal of Physics: Conference Series (JPCS) 80, 012025(2007).
  • Selective interchannel coupling as computational strategy to interpret complex atomic spectrum,
    H. R. Varma, T. Banerjee and P. C. Deshmukh, Special Issue of Indian Journal of Physics 81, 1069(2007).
  • Correlation and relativistic e ects on the photoionization of con ned atoms,
    H. R. Varma, P. C. Deshmukh, V. K. Dolmatov and S. T. Manson, Phys. Rev. A 76, 012711(2007).
  • Resonance-induced deviations of beta from 2.0 for rare gas s-subshell photoionization,
    S. B. Whit eld, R. Wehlitz, H. R. Varma, T. Banerjee, P. C. Deshmukh and S. T. Manson, J. Phys. B 39, L335(2006).
  • Interchannel coupling e ects on non-dipole photoionization parameters,
    P. C. Deshmukh, Tanima Banerjee, K. P. Sunanda and Hari Varma R., Radiation Physics and Chemistry 12, 2211(2006).
  • Absolute photoionization cross sections and resonance structure of doubly ionized silicon in the region of the 2p-1 threshold: Experiment and theory,
    J. -P. Mosnier, M. H. Sayyad, E. T. Kennedy, J.-M. Bizau, D. Cubaynes, F. J. Wuilleumier, J. -P. Champeaux, C. Blancard, R. Hari Varma, T. Banerjee, P. C. Deshmukh and S. T. Manson, Phys. Rev. A 68, 052712(2003).

    • Presentations (posters/talks)

  • J. George , Hari R. Varma , P. C. Deshmukh , S. T. Manson. Effect of Interchannel Coupling and Confinement on the Photoionization of Kr. In XXVII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011) Belfast, Northern Ireland, UK,27 July - 2 August, 2011
  • T Banerjee , Hari R Varma , P C Deshmukh , S T Manson. Dipole and Quadrupole Photoionization of Intermediate Subshells of Atomic Mercury. In XXVII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011) Belfast, Northern Ireland, UK,27 July - 2 August, 2011.

    • Presentations (posters/talks) in conferences

      Presentations (posters/talks) in national conferences

    • Cooper minima in E2 photoionization of xenon, Gagan Bihari Pradhan, Jobin Jose, Hari R. Varma, T. Banerjee and P. C. Deshmukh, T. C. on Atomic and Molecular Physics, Sardar Patel Universtiy India, January 3-5(2008).
    • Some recent studies in the photoionization of free and con ned atoms, INVITED TALK at the XV Ith NCAMP, TIFR, Mumbai, India, january 8-11(2007).
    • Autoionization resonances in @Kr and @Xe, Hari R. Varma and P. C. Deshmukh, XVI NCAMP, TIFR, Mumbai, Jan 8-11(2007).
    • E1 & E2 photoionization studies of free and con ned cadmium and mercury, Hari R. Varma, S. Sunil Kumar, Tanima Banerjee and P. C. Deshmukh, XVI NCAMP, TIFR, Mumbai, Jan 8-11(2007).
    • Con nement e ects on E1 and E2 photoionization of the ns subshells of atomic krypton and xenon T. Banerjee, Hari R. Varma and P. C. Deshmukh, XVI NCAMP, TIFR, Mumbai, Jan 8-11(2007).
    • Spin-polarization of Photoelectrons from Atomic Krypton, Anand Joshi, Saheer Ahmed, H. R. Varma, T. Banerjee,,S. Majumder, Y. Khajuria, P.C. Deshmukh, NSSA 2006, Calcutta, Jan 18-20 (2006).
    • Autoionization resonances in atomic Cd using multi channel quantum defect theory, Hari R. Varma, Tanima Banerjee, Saheer Ahmed, Anand Joshi, Y. Khajuria, S. Majumder and P. C. Deshmukh, T. C. on Atomic, Molecular and Optical Physics, IACS, Kolkatta, India, December 21-23(2005).
    • Interference between dipole excitation and ionization channels in con ned atoms, Hari R.Varma, Y. Khajuria, S. Majumder and P. C. Deshmukh, T. C. on Atomic and Molecular Physics, IACS, Calcutta, Dec 21-23(2005).
    • Consequences of quantum con nement on atomic photoionization parameters, Hari R. Varma and P. C. Deshmukh, XV NCAMP, Physical Research Laboratory, Ahmedabad, India, December 20-23(2004).
    • Interchannel coupling e ects on non-dipole photoionization paramters of atomic xenon and mer- cury, Tanima Banerjee, K. P. Sunanda, Hari Varma R, Ummal Momeen, P. C. Deshmukh, XV NCAMP, Physical Research Laboratory, Ahmedabad, India, December, 20-23(2004).
    • Newly found dynamical e ects on photoelectron parameters in the dipole approximation for atomic Xe, K. P. Sunanda, Tanima Banerjee, Hari Varma R, Ummal Momeen, P.C.Deshmukh, XV NCAMP, Physical Research Laboratory, Ahmedabad, India, December, 20-23 (2004).
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