High nuclear polarization of 3He at low and high pressure by metastability exchange optical pumping at 1.5 tesla

被引：28

作者：

Abboud, M

Sinatra, A

Maître, X

Tastevin, G

Nacher, PJ

机构：

[1] Ecole Normale Super, Lab Kastler Brossel, F-75005 Paris, France

[2] Univ Paris Sud, CNRS, UMR 8081, U2R2M, F-94275 Le Kremlin Bicetre, France

[3] Hop Bicetre, CIERM, F-94275 Le Kremlin Bicetre, France

[4] Univ Paris 06, Lab Kastler Brossel, CNRS, UMR 8552, F-75252 Paris 05, France

来源：

EUROPHYSICS LETTERS | 2004年 / 68卷 / 04期

关键词：

D O I：

10.1209/epl/i2004-10237-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Metastability exchange optical pumping of helium-3 is performed in a strong magnetic field of 1.5 T. The achieved nuclear polarizations, between 80% at 1.33 mbar and 25% at 67 mbar, show 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, these results open the way to alternative technological solutions for polarized helium-3 applications and in particular for magnetic-resonance imaging of human lungs.

引用

页码：480 / 486

页数：7