High nuclear polarization of helium-3 at low and high pressure by metastability exchange optical pumping at 1.5 Tesla - Archive ouverte HAL Access content directly
Journal Articles EPL - Europhysics Letters Year : 2004

High nuclear polarization of helium-3 at low and high pressure by metastability exchange optical pumping at 1.5 Tesla

Marie Abboud
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Alice Sinatra
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Geneviève Tastevin
Pierre-Jean Nacher

Abstract

We perform metastability exchange optical pumping of helium-3 in a strong magnetic field of 1.5 T. The achieved nuclear polarization, from 80% at 1.33 mbar to 25% at 67 mbar, shows a substantial improvement at high pressures with respect to standard low-field optical pumping. The specific mechanisms of metastability exchange optical pumping at high field are investigated, advantages and intrinsic limitations are discussed. From a practical point of view, our results open the way to alternative technological solutions for polarized helium-3 applications and in particular for magnetic resonance imaging of human lungs.
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Dates and versions

hal-00000535 , version 1 (31-07-2003)
hal-00000535 , version 2 (22-09-2004)

Identifiers

Cite

Marie Abboud, Alice Sinatra, Xavier Maître, Geneviève Tastevin, Pierre-Jean Nacher. High nuclear polarization of helium-3 at low and high pressure by metastability exchange optical pumping at 1.5 Tesla. EPL - Europhysics Letters, 2004, 68, pp.480. ⟨10.1209/epl/i2004-10237-y⟩. ⟨hal-00000535v2⟩
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