Related Experiment Video
Updated: Jun 20, 2026
09:40
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
Single-laser two-step fluorescence detection of atomic hydrogen in flames
Optics Letters
|September 22, 2009
Summary
Researchers developed a simpler, single-laser method for detecting atomic hydrogen. This technique uses a new two-step fluorescence process, ideal for flame measurements and advancing combustion diagnostics.
Area of Science:
- Atomic physics
- Laser spectroscopy
- Combustion science
Background:
- Atomic hydrogen detection is crucial for combustion analysis.
- Previous methods often require complex multi-laser setups.
Purpose of the Study:
- To introduce a simplified single-laser, two-step fluorescence technique for atomic hydrogen detection.
- To demonstrate its utility in flame measurements.
Main Methods:
- Utilized two-photon 243-nm excitation (n=1 to n=2).
- Employed subsequent single-photon 486-nm excitation (n=2 to n=4).
- Implemented using fundamental and frequency-doubled beams from a single 486-nm dye laser.
Main Results:
- Successfully detected atomic hydrogen using the novel single-laser approach.
- Demonstrated the technique's applicability in flame environments.
- Achieved simpler experimental implementation compared to previous two-laser methods.
Conclusions:
- The new single-laser technique offers a more accessible and efficient way to perform atomic hydrogen measurements.
- This method simplifies experimental setups for flame diagnostics and related research.
Related Concept Videos
01:29Atomic Fluorescence Spectroscopy
Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...
01:02Flame Photometry: Overview
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
01:16Flame Photometry: Lab
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
01:19Gas Chromatography: Types of Detectors-II
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
01:23Atomic Spectroscopy: Absorption, Emission, and Fluorescence
Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
01:30Atomic Emission Spectroscopy: Interference
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...