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Updated: Jun 5, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
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Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

Steering the electron in H2(+) by nuclear wave packet dynamics.

Bettina Fischer1, Manuel Kremer, Thomas Pfeifer

  • 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany.

Physical Review Letters
|January 15, 2011
PubMed
Summary

Electron localization in dissociating H2(+) molecular ions was studied using carrier-envelope phase (CEP) stable light fields. The findings reveal a strong dependence on laser pulse delay, uncovering distinct interfering dissociation channels.

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Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
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Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
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Published on: May 10, 2021

Area of Science:

  • Quantum mechanics
  • Molecular physics
  • Laser spectroscopy

Background:

  • Electron localization is crucial for understanding molecular dissociation dynamics.
  • Optical pump-probe spectroscopy is a standard technique for studying ultrafast processes.
  • Carrier-envelope phase (CEP) stable light fields offer precise control over laser pulses.

Purpose of the Study:

  • To investigate electron localization in dissociating H2(+) molecular ions.
  • To explore the influence of CEP-stable laser pulses on electron localization.
  • To identify the physical mechanisms governing electron localization dynamics.

Main Methods:

  • Utilizing a combination of CEP-stable light fields and optical pump-probe spectroscopy.
  • Precisely controlling the time delay between two laser pulses.
  • Analyzing the electron localization and localizability in H2(+) ions.

Main Results:

  • Observed strong dependence of electron localization on the time delay between laser pulses.
  • Identified a characteristic periodicity related to the oscillating molecular wave packet.
  • Uncovered two distinct sets of interfering dissociation channels responsible for electron localization.

Conclusions:

  • Electron localization in dissociating H2(+) is controllable via pump-probe delay.
  • The observed phenomena are governed by interfering dissociation pathways with unique temporal signatures.
  • This study provides insights into the fundamental mechanisms of electron localization in molecules.