Rotational angular momentum polarization

The influence of stray magnetic fields

Sarantos Marinakis, Grant Paterson, Graham Richmond, Michael Rockingham, Matthew L. Costen, Kenneth G. McKendrick

Research output: Contribution to journalArticle

Abstract

We show that weak residual magnetic fields can significantly affect the preparation and measurement of molecular rotational angular momentum alignment in a typical gas-phase stereodynamics apparatus. Specifically, polarization spectroscopy, a third-order nonlinear spectroscopic technique, is used to prepare and probe the collisional and noncollisional losses of rotational angular momentum alignment of OH X ?2. Residual magnetic fields of the order of the geomagnetic field are shown to have a significant effect on the prepared polarization on a submicrosecond timescale. This can be expected to be a significant effect for many gas-phase free radicals, such as those of interest in combustion, atmospheric chemistry, and the burgeoning field of cold molecules. We demonstrate a simple experimental remedy for this problem. © 2008 American Institute of Physics.

Original languageEnglish
Article number021101
JournalJournal of Chemical Physics
Volume128
Issue number2
DOIs
Publication statusPublished - 2008

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Magnetic Fields
Gases
Physics
Free Radicals
Spectrum Analysis

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Marinakis, Sarantos ; Paterson, Grant ; Richmond, Graham ; Rockingham, Michael ; Costen, Matthew L. ; McKendrick, Kenneth G. / Rotational angular momentum polarization : The influence of stray magnetic fields. In: Journal of Chemical Physics. 2008 ; Vol. 128, No. 2.
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Rotational angular momentum polarization : The influence of stray magnetic fields. / Marinakis, Sarantos; Paterson, Grant; Richmond, Graham; Rockingham, Michael; Costen, Matthew L.; McKendrick, Kenneth G.

In: Journal of Chemical Physics, Vol. 128, No. 2, 021101, 2008.

Research output: Contribution to journalArticle

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T2 - The influence of stray magnetic fields

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AU - Paterson, Grant

AU - Richmond, Graham

AU - Rockingham, Michael

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AU - McKendrick, Kenneth G.

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