Research

(1) By using the complex-scaling method, the doubly excited resonance states of the He and the H- ion with Coulomb and screened Coulomb potentials are calculated;

(2) Calculate the P-wave resonances in positron-hydrogen scattering. in Debye plasmas by using the complex-scaling method;

(3) Investigate the shape resonances in electron-hydrogen resonances lying above the H (N=2), (N=3), and (N=4) thresholds with screened Coulomb potentials or with exponential cosine screened Coulomb potentials;

(4) Investigate the shape resonances in Ps-, concentrating on the higher excitation thresholds (N=3, 4, and 5) of the Ps atom;

(5) Investigate Borromean bindings for hydrogen molecular ions interacting with short-range potentials;

(6) Calculate cross sections of charge exchange and ionization in O8++He+ (and other heliumlike ions) and in C6++He+ collisions in Debye plasmas using the Classical Trajectory Monte Carlo method;

(7) Investigate the combined DC electric-field and screened Coulomb effects and on doubly excited singlet states of helium and H- ion using correlated configuration-interaction wave functions;

(8) Calculate the oscillator strengths and multipole polarizabilities of divalent atoms such as the beryllium atoms and magnesium atoms immersed in Debye plasmas.