Related Experiment Video
Updated: Jun 23, 2026
07:44
Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
Published on: April 28, 2016
Resonance in scattering and absorption from large noble gas clusters
Optics Express
|May 1, 2009
Summary
Investigating light scattering in noble gas clusters revealed a peak signal at specific laser pulse widths. This scattering peak appears at longer pulse durations compared to absorption measurements, suggesting complex physical phenomena.
Area of Science:
- Atomic and Molecular Physics
- Laser-Matter Interactions
- Plasma Physics
Background:
- Intense laser pulses interacting with large noble gas clusters induce complex phenomena.
- Previous studies observed a peak in absorption measurements when varying laser pulse width.
- Understanding light scattering provides insights into cluster dynamics and energy deposition.
Purpose of the Study:
- To investigate light scattering characteristics in large noble gas clusters under intense laser irradiation.
- To compare the pulse width dependence of light scattering with existing absorption data.
- To identify discrepancies between experimental observations and theoretical models.
Main Methods:
- Irradiation of large noble gas clusters using intense laser pulses.
- Measurement of light scattering signals as a function of laser pulse width.
- Comparison of scattering data with previously reported absorption measurements.
Main Results:
- A distinct peak was observed in the light scattering signal when the laser pulse width was varied.
- The peak in the scattering signal occurred at a longer pulse width compared to the absorption peak.
- The experimental results deviated from predictions of a simple simulation model.
Conclusions:
- The observed shift in the scattering peak suggests phenomena beyond simple absorption models.
- Discrepancies may arise from laser pulse propagation effects within the cluster.
- Non-linear optical effects not accounted for in basic models likely influence the scattering behavior.
Related Concept Videos
02:16Resonance and Hybrid Structures
According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
02:54Noble Gases
The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.
02:39Emission Spectra
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
01:27¹H NMR: Long-Range Coupling
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
01:14Molecular Spectroscopy: Absorption and Emission
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
01:19Concept of Resonance and its Characteristics
If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not immune...