Programme

P.101 -- Posters, VCTP-50

Date: Thursday, 7 August 2025

Time: 08:30 - 10:00

INVESTIGATION OF THE SOFT PARAMETER IN THE ELECTRON-ION COULOMB POTENTIAL AND THE GOVERNING MECHANISMS OF NONSEQUENTIAL TRIPLE IONIZATION IN NOBLE GAS ATOM

Chau Bao Khoa 1*, Truong Dang Hoai Thu 1, Do Van Tai 1, Ho Nguyen Xuan Bach 1

(1) Department of Physics, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam

In this study, based on the three-dimensional classical ensemble model, we propose a procedure to determine the soft parameter in the Coulomb interaction potential between ionized electrons and the parent ion. This is an important parameter used in the simulations of nonsequential triple ionization (NSTI) of noble gas atoms. Two physical conditions are applied to constrain this parameter: ensuring that all three electrons consistently have positive kinetic energy and preventing the autoionization of the atom. In addition, we analyze the dominant mechanisms governing the ionization dynamics and validate the results by comparing the ionization probabilities and recoil ion momentum distributions with previous experimental and theoretical data.

Presenter: Chau Bao Khoa