Intensity Dependence of Coulomb-Repulsion Effect in Strong-Field Nonsequential Double Ionization |
| T.D.H. Truonga, b, c, T.D. Anh-Taid, H.H. Nguyena, N.H. Nhab, c, D.H. Dunge, V.N.T. Phama, f
aDepartment of Physics, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam bDepartment of Theoretical Physics, University of Science, Ho Chi Minh City 700000, Vietnam cVietnam National University, Ho Chi Minh City 700000, Vietnam dQuantum Systems Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan eDepartment of Natural Science, Dong Nai University, Dong Nai, Vietnam fInternational Cooperation Office, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam |
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| The nonsequential double ionization of the argon atom is studied in this article using an orthogonal two-color laser pulse with different intensities. The results demonstrate that electron correlation is strongly dependent on the relative phase of the laser pulses. We also observe that the recollision time remains constant when analyzing the nonsequential double ionization signal at the relative phase 0.6π. Meanwhile, the contribution of each returning bunch of the first ionized electron and the final electron-electron repulsion highly depends on the laser intensity. Coulomb repulsion is most pronounced at low and high laser intensities. However, at moderate laser intensities, it does not sufficiently affect the momentum distribution. |
DOI:10.12693/APhysPolA.141.569 topics: Coulomb repulsion, orthogonal two-color laser, nonsequential double ionization process, Yukawa potential |