Pulse-duration dependence of the double-to-single ionization ratio of Ne by intense 780-nm and 800-nm laser fields: Comparison of simulations with experiments

Journal Article · 08 April 2019 · Physical Review A

DOI: https://doi.org/10.1103/physreva.99.043408 · OSTI ID:1610048

Chen, Zhangjin ^[1]; Zhang, Lina ^[1]; Wang, Yali ^[1]; Zatsarinny, Oleg ^[2]; Bartschat, Klaus ^[2]; Morishita, Toru ^[3]; Lin, C. D. ^[4]

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1. Shantou University (China)
2. Drake University, Des Moines, IO (United States)
3. The University of Electro-Communications, Tokyo (Japan)
4. Kansas State Univ., Manhattan, KS (United States)

Accurate ab initio calculations of the ratio of double-to-single ionization of Ne atoms in strong laser fields are difficult due to the many-electron nature of the target. Here, with accurate total cross sections carefully evaluated by using the state-of-the-art many-electron R-matrix theory for both electron-impact ionization and electron-impact excitation of Ne⁺, we simulate the total double-ionization yields of Ne²⁺ in strong laser fields at 780 and 800 nm for pulse durations in the range from 7.5 to 200 fs based on the improved quantitative rescattering model. The corresponding single-ionization yields of Ne⁺ are calculated within the nonadiabatic tunneling model of Perelomov, Popov, and Terent'ev. The ratio of double-to-single ionization of Ne is then obtained from the calculated double- and single-ionization yields. By normalizing the ratio to the one calculated from solving the time-dependent Schrödinger equation for a short few-cycle pulse, we make quantitative comparisons of our results with experimental data to show that our model predicts the experimental findings very well. Lastly, we analyze the pulse-duration dependence of the double-to-single ionization ratio.

• Research Organization: Kansas State Univ., Manhattan, KS (United States)
• Sponsoring Organization: National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); JJapan Society for the Promotion of Science (JSPS); Scientific Research Foundation for the Returned Overseas Chinese Scholars; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; Japan Society for the Promotion of Science KAKENHI
• Grant/Contract Number: FG02-86ER13491; PHY-1430245; PHY-1520970; PHY-1803844; 11274219; 16H04029; 16H04103; 17K05597
• OSTI ID: 1610048
• Alternate ID(s): OSTI ID: 1505841
• Journal Information: Physical Review A, Vol. 99, Issue 4; ISSN 2469-9926
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English