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Complete Characterizations of Intermediate and Final State Wave Functions with Photoionization of Polarized Rb.

Huanyu Ma1,2, Linxuan Zhang3,4, Xincheng Wang1

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We developed a new method to measure the amplitude and phase of photoionization dynamics using photoelectron momentum distribution. This technique precisely characterizes atomic ionization processes.

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Area of Science:

  • Atomic Physics
  • Quantum Mechanics
  • Laser Spectroscopy

Background:

  • Photoionization dynamics are crucial for understanding atomic and molecular processes.
  • Extracting amplitude and phase information from ionization experiments is challenging.
  • Previous methods lacked the precision for complete characterization of ionization channels.

Purpose of the Study:

  • To propose and demonstrate a novel experimental approach for retrieving photoionization amplitude and phase.
  • To precisely characterize the ionization dynamics of polarized Rubidium (Rb) atoms.
  • To provide a benchmark for one-photon single ionization studies.

Main Methods:

  • Utilizing a 400 nm femtosecond laser to ionize polarized Rb atoms in the 5p state.
  • Employing a magneto-optical trap reaction microscope to control magnetic quantum numbers.
  • Analyzing the photoelectron momentum distribution (PMD), specifically its tilt angle and interference structure.

Main Results:

  • Successfully extracted the relative amplitude and phase shift of εs and εd ionization channels.
  • Experimental results show excellent agreement with ab initio calculations.
  • Achieved a complete measurement characterizing intermediate and final state wave functions.

Conclusions:

  • The developed method offers a powerful tool for probing ionization dynamics.
  • This study sets a new standard for precision in one-photon single ionization experiments.
  • The findings contribute to a deeper understanding of electron-atom interactions and quantum states.