Ghanshyam Purohit
Area of Specialization: Atomic Physics, electron – atom/ion collision studies, electron spectroscopy: The ionization of the atoms, ions and molecules by relativistic / non-relativistic projectiles such as electrons, protons, positrons or highly charged ions has been the subject of theoretical and experimental studies since the early days of quantum mechanics. With the advent of modern coincidence techniques, it has become possible to investigate electron impact ionization in great detail by recording the triply differential cross section, i.e. detect the two electrons emerging from the reaction resolved in energy and angles. Such studies have delivered important insights into the dynamics of quantum few-body systems, information about the structure of the target, information of wave functions and momentum profile. The atomic and molecular data are strongly required in various scientific and technological areas such as aeronomy, astrophysics, biomedicine, gaseous electronics, surface physics, industrial plasmas, fusion, semiconductor and other technologies. We have calculated triple differential cross sections of the electron impact single ionization processes (i.e. (e, 2e) processes) for Inert gases He, Ne, Ar, Kr and Xe in various geometrical modes and kinematical conditions. We have also investigated spin asymmetry in the relativistic as well non-relativistic energy regimes for various atomic and ionic targets. Recently we have investigated (e, 2e) processes on alkali, alkali earth targets and argon atoms in low energy regime. It is observed that post-collision interaction and polarization are important effects at the low incident electron energies.

Research Interest: electron/positron – atom/ion collision studies, biophysics, quantum information theory, quantum computation, spintronics, non-linear dynamics and cryptography, complex systems.

Publication:
Refereed Publications: 15
 Book Chapters: 2
Refereed Conference Publications: 12
Other Scientific Publications: 02
Papers presented in International Conference: 16
 Papers presented in National Conference: 10

List of refereed Publications:

Book Chapters:

  • A Numerical Exploration of the Dynamical Behaviour of q-Deformed Nonlinear Maps Vinod Patidar, G. Purohit and K. K. Sud
    “Chaotic Systems: Theory and Applications” , World Scientific, p 257 (2010)
  • Electron dichroism in the relativistic (e, 2e) processes on atoms A. S. Bhullar, G. Purohit, R. Choubisa and K. K. Sud "Recent advances in atomic and molecular physics" (Edited by Rajesh Srivastava) (Phoenix), p 314 (2001).

List of papers presentated in International Conferences (Abroad):

Research Achievements/Awards:
  • Received Faculty Prime Mover Award 2009 from Sir Padampat Singhania University, Udaipur
  • Referee of British Institute of Physics journals.
  • Selected for the best teacher award 2009 by Dainik Bhaskar Group, Udaipur.
  • Invited as visiting scientist by by Institute of Theoretical Atomic, Molecular and Optical Physics (ITAMP), Harvard-Smithsonian Center for Astrophysics, Harvard University, Cambridge, MA, USA.
  • Invited as visiting scientist by Max-Planck-Institut für Kernphysik, Heidelberg, Germany.
  • Invited as a Guest Scientist by “Abdus Salam International centre for Theoretical Physics”, Trieste, Italy (year 2003 and 2005).
  • Foreign travel grants awarded by Department of Science and Technology (New Delhi), INSA (New Delhi), CSIR (New Delhi), CCSTDS (Chennai), Stockholm University (Sweden), National Institute for Fusion Science (Japan), Paris Observatory (France), Cambridge University (UK), Graz university of technology, Austria, Centre for applied physics and computational mathematics, Beijing, china, Dublin City University, Dublin, Ireland, Kitasato University, Japan, IMRAM, Tohoku University, Japan, Gordon Research Conferences, USA .
  • Received Nature Publishing Group Award to present research work at Gordon Research Conference on Multiphoton processes, 2010 held at Tilton School, NH, USA.
  • Received Nature Publishing Group Award to present research work at Gordon Research Conference on Time Dependent Density-Functional Theory, 2007 held at Colby College, Waterville, Maine, USA.
  • Junior Research fellowship and Senior Research Fellowship awarded by Council of Scientific and Industrial Research (CSIR), New Delhi after being selected from the National level CSIR-UGC-NET-JRF Exam.
  • Gold Medal awarded by M. L. S. University, Udaipur for getting first in the M. Sc., Physics exam. 1997.
Membership of the learned bodies:
  • Indian Society of Atomic and Molecular Physics (ISAMP)
  • Indian Physics Association (IPA)
  • Indian Association of Physics Teachers (IAPT)
  • Indian Physical Society (IPS)
  • Indian society of Technical Education (ISTE)
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