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Updated: Jul 2, 2026

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

High voltage determination and stabilization for collinear laser spectroscopy applications.

Kristian König^1,2, Finn Köhler¹, Julian Palmes¹

¹Institut für Kernphysik, Department of Physics, Technische Universität Darmstadt, 64289 Darmstadt, Germany.

The Review of Scientific Instruments

|August 23, 2024

Summary

Researchers improved nuclear property measurements using collinear laser spectroscopy. A new high-voltage system and method to account for field penetration reduce systematic uncertainties, enhancing precision for exotic nuclei research.

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Area of Science:

Nuclear Physics
Atomic Physics
Laser Spectroscopy

Background:

Fast beam collinear laser spectroscopy precisely measures nuclear properties (spin, moments, charge radius) using atomic observables like hyperfine splitting and isotope shift.
Doppler broadening reduction via electrostatic acceleration is key, but acceleration potential is now the main systematic uncertainty.
Advancements in laser frequency stabilization highlight the need to address remaining systematic errors.

Purpose of the Study:

To develop and implement a novel high-voltage system to reduce systematic uncertainties in collinear laser spectroscopy.
To investigate and correct for the effects of field penetration in the laser-ion interaction region.
To enable more precise measurements of nuclear properties for exotic nuclei.

Main Methods:

Development and testing of a custom high-voltage divider and feedback loop for precise electrostatic acceleration.
Implementation of collinear laser spectroscopy at a 100-kHz precision level.
Laser spectroscopic extraction of field penetration effects using a frequency comb for laser referencing and Doppler tuning.

Main Results:

A high-voltage system achieving 100-kHz precision was successfully developed and tested.
Field penetration effects on isotope shifts and hyperfine splittings were quantified.
An effective scanning potential was defined, allowing for precise Doppler tuning without systematic deviations.

Conclusions:

The developed high-voltage system and field penetration correction significantly reduce systematic uncertainties in fast beam collinear laser spectroscopy.
These advancements enable more accurate determination of nuclear ground state properties for exotic nuclei.
The methodology allows for the continued use of efficient Doppler tuning while maintaining high precision.