X129eXe Molecular Spin Relaxation

B. Chann, I. A. Nelson, L. W. Anderson, B. Driehuys, and T. G. Walker
Phys. Rev. Lett. 88, 113201 – Published 28 February 2002
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Abstract

We identify the formation of bound 129XeXe molecules as the primary fundamental spin-relaxation process at densities below 14 amagat. Low pressure Xe relaxation rate measurements as a function of gas composition show that Xe-Xe molecular relaxation contributes 1/T1=1/4.1h to the total observed relaxation rate. The measured rate is consistent with theoretical estimates deduced from previously measured NMR chemical shifts. At atmospheric pressure the molecular relaxation is more than an order of magnitude stronger than binary relaxation. Confusion of molecular and wall relaxation mechanisms has historically caused wall relaxation rates to be overestimated.

  • Received 22 October 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.113201

©2002 American Physical Society

Authors & Affiliations

B. Chann1, I. A. Nelson2, L. W. Anderson1, B. Driehuys2, and T. G. Walker1

  • 1Department of Physics, University of Wisconsin–Madison, Madison, Wisconsin 53706
  • 2Amersham Health, 2500 Meridian Parkway, Suite 175, Durham, North Carolina 27713

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Vol. 88, Iss. 11 — 18 March 2002

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