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A: Fachverband Atomphysik
A 27: Poster III
A 27.21: Poster
Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof
Multi-Sideband RABBIT in Argon and Helium — •Divya Bharti1, Hemkumar Srinivas1, Farshad Shobeiry1, Kathryn Hamilton2, Robert Moshammer1, Thomas Pfeifer1, Klaus Bartschat2, and Anne Harth1,3 — 1Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany — 2Department of Physics and Astronomy, Drake University, Des Moines, USA — 3Department of Optics and Mechatronics, Hochschule Aalen, Aalen, Germany
We present an experimental and theoretical study for three-sideband (3-SB) RABBIT (The reconstruction of attosecond beating by interference of two-photon transition) in argon and Helium. RABBIT is an interferometric technique in which an XUV pulse train ionizes the target, and an IR pulse interacts with the photoelectrons. In the 3-SB RABBIT scheme, the interaction with the IR photons leads to the formation of three sidebands in between any two main bands formed by two adjacent harmonics. The oscillation phases of the three SBs in the group are independent of a potential chirp in the harmonics. We compare the oscillation phases extracted from specific SB groups formed by two adjacent harmonics. We also compare their angle dependence and discuss the role of the propensity rule and the variation in the continuum-continuum coupling phase with the orbital angular momentum. Results from R-matrix (close-coupling) with time-dependence calculation on Argon and SAE calculations on Helium are also presented.