Program

P.16 -- Poster, NCTP-40

Date: Monday, 27 July 2015

Time: 14h00 - 15h30

INVESTIGATION OF NONSEQUENTIAL DOUBLE IONIZATION PROCESS OF HELIUM BY LINEARLY POLARIZED LASER FIELD AT HIGH INTENSITY

Tran Lan Phuong (1), Truong Dang Hoai Thu (1), Huynh Van Son (2), Le Hoang Dong Phuong (1), Pham Nguyen Thanh Vinh (1)

(1) Ho Chi Minh University of Pedagogy, 280 An Duong Vuong Ward 4 District 5 Ho Chi Minh City (2) Ho Chi Minh University of Science, 227Nguyen Van Cu Ward 4

By using the classical three-dimensional ensemble model, we investigate the nonsequential double ionization process of helium by 800-nm laser pulses at 2.0 PW/cm$^2$. The results show that a pronounced V-like structure is exhibited in the two-electron momentum distribution along the laser polarization axis. At high laser intensity, this structure which was observed experimentally [Phys. Rev. Lett. \textbf{99}, 263003 (2007)] can be explained by the asymmetric energy sharing of two electrons during the recollision process. This asymmetric energy sharing process also embeds in the transverse momentum spectra, which provide insight into the microscopic dynamics of the three-body interactions.

Presenter: Tran Lan Phuong