Program

P.32 -- Poster, NCTP-41

Date: Tuesday, 2 August 2016

Time: 08h30 - 10h00

Evaluation the validity of the weak-field-approximation methods in consideration of the ionization rate of atoms

Nguyen Phuc (1), Pham Nguyen Thanh Vinh (2)

(1) Ho Chi Minh University of Science (2) Ho Chi Minh University of Pedagogy

Recently there are several theories used to investigate the ionization rate of atoms under the influence of the electric field have been proposed. These theories provide analytical formulae to quickly calculate the ionization rate of atoms for a wide range of field strength from tunneling to over-the-barrier regimes. However, the validity of them is still under debate. In this work, we provide a reliable tool based on Siegert-state method to generally evaluate the applicability of these approximation theories. Based on this evaluation, we can be able to utilize the best approximation approach with respect to the strength of the electric field. The limitation of each analytical formula is also discussed.

Presenter: Pham Nguyen Thanh Vinh