Related Experiment Video
Updated: Aug 14, 2026
14:58
Quantifying X-Ray Fluorescence Data Using MAPS
Published on: February 17, 2018
Multiplet lines in seeded stimulated Mn Kα 1 x-ray emission
Thomas Kroll1, Margaret Doyle2, Aliaksei Halavanau3
1Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
Physical Review Applied
|August 13, 2026
Summary
Seeded stimulated x-ray emission spectroscopy (S-XES) resolves manganese Kα1 x-ray emission multiplet structures. This advanced technique overcomes lifetime broadening, enabling high-resolution electronic structure studies in transition-metal complexes.
Area of Science:
- Atomic and Molecular Physics
- Solid State Physics
- Quantum Chemistry
Background:
- X-ray emission spectroscopy (XES) is crucial for analyzing electronic structures of transition metals.
- Lifetime broadening in conventional XES obscures fine multiplet details in manganese (Mn) Kα1 emission.
- Previous work demonstrated stimulated emission in Mn complexes without losing chemical sensitivity.
Purpose of the Study:
- To resolve the multiplet structure of Mn Kα1 x-ray emission.
- To overcome limitations of lifetime broadening in spontaneous XES.
- To advance high-resolution electronic structure spectroscopy in transition-metal complexes.
Main Methods:
- Utilized seeded stimulated x-ray emission spectroscopy (seeded S-XES).
- Employed femtosecond pump pulses above the Mn K edge to create 1s core holes.
- Used a second-color tunable seed pulse to initiate and enhance specific emission lines.
Main Results:
- Successfully resolved the multiplet structure of Mn Kα1 x-ray emission.
- Enhanced individual emission lines, overcoming lifetime broadening effects.
- Demonstrated the technique's ability to provide high-resolution electronic structure information.
Conclusions:
- Seeded S-XES is a powerful technique for high-resolution electronic structure studies of transition metals.
- This method allows probing electronic structures beyond the core-hole lifetime limitations.
- Potential applications include catalysis, inorganic chemistry, and materials science research.
Related Concept Videos
01:13¹H NMR: Complex Splitting
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.
01:13¹H NMR Signal Multiplicity: Splitting Patterns
When protons A and X are coupled, their nuclear spin energy levels are slightly modified. This is because the energy required to excite proton A to a spin state parallel to proton X is slightly different from the energy required for it to become anti-parallel to spin X. Consequently, there are two possible excitation frequencies for A (A1 and A2), depending on the spin state of X, and vice versa. The mutual nature of coupling implies that the difference between frequencies A1 and A2, indicated...
01:10Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1 triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the others.
01:05Atomic Nuclei: Magnetic Resonance
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.