Non-adiabatic photo-ionization is difficult to control as it relies on the derivatives of envelope and not phase-details short ionizing pulse. Here, we introduce a catalyzing state, whose presence render non-adiabatic ionization sensitive tailored pulses. Since state in general easy create, this opens perspective for coherent ultra-fast ionization.

We have simulated ionization of purine nucleic acid components in the gas phase and in a water environment. The vertical and adiabatic ionization processes were calculated at the PMP2/aug-cc-pVDZ level with the TDDFT method applied to obtain ionization from the deeper lying orbitals. The water environment was modeled via microsolvation approach and using a nonequilibrium polarizable continuum m...

After many years of intense research the dynamical response of quantum-mechanical many-particle systems perturbed by an external time dependent force still remains as one the most fundamental and challenging problems in physics. Among them the three-body Coulomb problem represents the most prominent example. It can be studied in great detail in atomic collisions and ionization of simple atoms b...

Background: The effectiveness and safety of brachytherapy treatment is mainly concerned with the calibration of sources and their traceability to internationally accepted Standards. Secondary Standard Dosimetry Laboratory (SSDL) does not offer calibration of ionization chambers with gamma-ray spectrum of high dose rate source 192Ir . This work has been carried out to calibrate the high dose rat...

Background: Absolute dosimetry of external beam radiotherapy is carried out by the use of ionization chambers. These chambers must be calibrated at a standard dosimetry laboratory before any use in clinical dosimetry. The secondary standard dosimetry laboratory of Iran (SSDL) has the duty of calibrating the ionization chambers used in radiotherapy centers in Iran. Materials and Methods...