Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Polarization Modulation Effects in Infrared-Infrared Four-Level Double Resonance in 13CH3F and 15NH3

Soriano1, Schwendeman

  • 1Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824

Journal of Molecular Spectroscopy
|December 16, 1998
PubMed
Summary

This study derives Jones matrices for optically pumped samples, predicting double resonance absorption coefficients. Collisional effects on molecular orientation and alignment are quantified, revealing key transfer rate constants.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Reply

Clinical infectious diseases : an official publication of the Infectious Diseases Society of America·2000
Same author

Multi-Link Stenting in Acute Myocardial Infarction.

The Journal of invasive cardiology·2000
Same author

The role of PEG on the stability in digestive fluids and in vivo fate of PEG-PLA nanoparticles following oral administration.

Colloids and surfaces. B, Biointerfaces·2000
Same author

[Pneumonia due to Haemophilus influenzae.Study in a series of 58 patients]

Revista espanola de quimioterapia : publicacion oficial de la Sociedad Espanola de Quimioterapia·2000
Same author

The Lineshape of Saturation-Broadened Transitions in the Gas Phase.

Journal of molecular spectroscopy·1999
Same author

Patch sampling behaviour and future foraging expectations in Argentine ants, Linepithema humile

Animal behaviour·1998

Area of Science:

  • Molecular Spectroscopy
  • Quantum Optics
  • Chemical Physics

Background:

  • Optically pumped samples exhibit complex absorption behaviors influenced by molecular velocity and polarization.
  • Four-level double resonance experiments probe molecular energy states and dynamics.
  • Collisions significantly impact molecular orientation and alignment, affecting spectral lineshapes.

Purpose of the Study:

  • Derive Jones matrices for optically pumped samples to predict double resonance absorption coefficients.
  • Investigate the dependence of absorption coefficients on statistical tensor ranks (population, orientation, alignment).
  • Analyze collisional effects on molecular anisotropy in 13CH3F and 15NH3 using double-resonance polarization modulation.

Main Methods:

  • Derivation of Jones matrices for optically pumped systems.

Related Experiment Videos

  • Prediction of four-level double resonance absorption coefficients based on molecular velocity and beam polarization.
  • Application of least-squares fitting to experimental lineshapes using Keilson-Storer collision kernels.
  • Analysis of polarization modulation experiments with plane-polarized and circularly polarized radiation.

    • Main Results:

    • Absorption coefficients depend on statistical tensor ranks n=0, 1, and 2 under population modulation.
    • Polarization modulation reveals dependence on alignment (plane-polarized) or orientation (circularly polarized).
    • Collisional transfer rate constants for population (n=0) are found to be larger than for orientation/alignment (n=1, 2).
    • Optimal ratios of rate constants for n>0 to n=0 are determined for 13CH3F (2/3) and 15NH3 (1/3).

    Conclusions:

    • The derived theory accurately interprets double-resonance experiments in 13CH3F and 15NH3.
    • Collisional effects, including dipole-dipole interactions and V-V mechanisms, are crucial for rotational energy transfer.
    • The study quantifies the impact of collisions on molecular orientation and alignment anisotropy.