Photoionization Delay in He, Ne, Ar and Kr

TL;DR

This paper investigates the timing differences in electron ejection from noble gases when ionized by attosecond pulses, providing insights into atomic photoionization dynamics across He, Ne, Ar, and Kr.

Contribution

It introduces a pump-probe experimental method to measure relative photoionization delays among noble gases using high harmonic generation.

Findings

Measured photoionization delays for Ne, Ar, and Kr relative to He.

Characterized the attosecond pulse train used in experiments.

Provided data on atomic delay contributions in noble gases.

Abstract

We study photoionization of various noble gas atoms by attosecond pulses produced in High Harmonic Generation (HHG). We use a pump-probe experiment to measure the time delays of electrons photoionized from Neon, Argon, and Krypton relative to those photoionized from Helium atoms. The Attosecond Pulse Train (APT) is characterized and the relative delay in photoionization of various noble gases is measured. The photoionization delay of Ne, Ar, and Kr is determined using previously calculated values for the He atomic delay and the delay associated with the probe process.