Research Groups

« all research groups

Kadyrov Group

Faculty of Science and Engineering, Curtin University

We work on a wide range of multidisciplinary research projects at the intersection of theoretical atomic and molecular physics, physics of hadron therapy and nuclear astrophysics. Current research activities include:

  • Ion-atom and ion-molecule collisions for various applications including fusion plasma modelling and diagnostics. See below for more information.

  • Positron collisions with atoms and molecules. We have developed a 2-centre convergent close-coupling (CCC) approach for positron scattering on atomic and molecular targets including Ps formation [1].

  • Antihydrogen formation for testing gravitational behaviour of antimatter and CPT invariance. Recently, the CCC approach has been used to calculate antihydrogen formation in excited Ps collisions with antiproton at ultralow energies [2].

  • Stopping power calculations for hadron therapy [3].

  • Problems of formal scattering theory, surface-integral approach [4].

  • Theory of nuclear and astrophysical reactions [5].

Heavy particle collisions: We have developed two distinct versions of the two-centre CCC approach to heavy particle collisions: quantum-mechanical (QM-CCC) [6] and wave-packet (WP-CCC) [7]. The QM-CCC approach treats the relative motion of the heavy particles fully quantum-mechanically. It relies on the continuum discretisation using the basis of orthogonal Laguerre pseudostates. The WP-CCC approach is semiclassical. Here the continuum is discretised using wave packets constructed from the Coulomb wave functions. Due to the flexibility in choosing state energies, the WP-CCC approach is ideal for differential ionisation studies. Both versions of the CCC approach allow to study ion-atom and ion-molecule collisions including elastic scattering, excitation, ionisation, electron capture and electron capture into the continuum. We can calculate integrated and various differential cross sections for all these processes and provide density matrix elements for excitation of the first several states of the target and the ion formed after electron capture. Recently, we have calculated excitation, ionisation and electron-capture cross sections for proton collisions with the ground [8] and excited [9] states of atomic hydrogen. The density matrix elements required for fusion plasma modelling and diagnostics have been calculated for proton scattering on the initial 1s, 2s, 2p0 and 2p1 states of hydrogen. The approach has also been used to calculate differential cross sections for ionisation in proton collisions with atomic hydrogen [7]. Very recently, we have extended the two-centre WP-CCC approach to ionisation and electron capture in collisions of multiply-charged ions with hydrogen. So far the method has been used to ionisation, electron capture and excitation in collisions of C6+ ions with atomic hydrogen [10]. Currently, we are working on He2+, Li3+ and Be4+ collisions with hydrogen in the ground and excited states and on extension of the CCC approach to ion collisions with 2-electron targets. In the near future we plan to extend our approach to ion collisions with multi-electron targets.


Professor Alisher KADYROV
Department of Physics and Astronomy, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
Group Website

  • [1] A. S Kadyrov and I. Bray, "Recent progress in the description of positron scattering from atoms using the convergent close-coupling theory", Journal of Physics B: Atomic, Molecular and Optical Physics 49, 222002 (2016). [link to article]
  • [2] A. S. Kadyrov et al., "Quantum suppression of antihydrogen formation in positronium-antiproton scattering", Nature Communications 8, 1544 (2017). [link to article]
  • [3] J. J. Bailey et al., "Proton-beam stopping in hydrogen", Physical Review A (accepted) 99, 042700 (2019). [link to article]
  • [4] A. Kadyrov et al., "Surface-integral formulation of scattering theory", Annals of Physics 324, 1516-1546 (2009). [link to article]
  • [5] L. D. Blokhintsev et al., "Extrapolation of scattering data to the negative-energy region. III. Application to the p−16O system", Physical Review C 98, 064610 (2018). [link to article]
  • [6] I. B Abdurakhmanov et al., "Solution of the proton-hydrogen scattering problem using a quantum-mechanical two-center convergent close-coupling method", Journal of Physics B: Atomic, Molecular and Optical Physics 49, 115203 (2016). [link to article]
  • [7] I. B. Abdurakhmanov et al., "Wave-packet continuum-discretization approach to ion-atom collisions including rearrangement: Application to differential ionization in proton-hydrogen scattering", Physical Review A 97, 032707 (2018). [link to article]
  • [8] I. B. Abdurakhmanov et al., "Balmer emission induced by proton impact on atomic hydrogen", Journal of Physics B: Atomic, Molecular and Optical Physics (in press) (2019).
  • [9] I. B Abdurakhmanov et al., "Proton scattering from excited states of atomic hydrogen", Plasma Physics and Controlled Fusion 60, 095009 (2018). [link to article]
  • [10] I. B. Abdurakhmanov et al., "Ionization and electron capture in collisions of bare carbon ions with hydrogen", Physical Review A 98, 062710 (2018). [link to article]


Beryllium Carbon CCC Charge-Exchange Processes Elastic Scattering Electron Capture Heavy Particle Collisions Helium Highly Charged Ions Hydrogen (1H) Inelastic Scattering Ion Impact Processes Lithium Neon Neutral Beams Proton-impact ionisation Theory