NDLI: Metastability exchange optical pumping of 3He gas up to hundreds of millibars at 4.7 Tesla

Content Provider	Springer Nature Link
Author	Nikiel Osuchowska, Anna Collier, Guilhem Głowacz, Bartosz Pałasz, Tadeusz Olejniczak, Zbigniew Wȩglarz, Władysław P. Tastevin, Geneviève Nacher, Pierre Jean Dohnalik, Tomasz
Copyright Year	2013
Abstract	Metastability exchange optical pumping (MEOP) is experimentally investigated in 3He at 4.7 T, at room temperature and for gas pressures ranging from 1 to 267 mbar. The 23S-23P transition at 1083 nm is used for optical pumping and for detection of the laser-induced orientation of 3He atoms in the rf discharge plasma. The collisional broadening rate is measured (12.0 ± 0.4 MHz mbar−1 FHWM) and taken into account for accurate absorption-based measurements of both nuclear polarization in the ground state and atom number density in the metastable 23S state. The results lay the ground for a comprehensive assessment of the efficiency of MEOP, by comparison with achievements at lower field (1 mT–2 T) over an extended range of operating conditions. Stronger hyperfine decoupling in the optically pumped 23S state is observed to systematically lead to slower build-up of 3He orientation in the ground state, as expected. The nuclear polarizations obtained at 4.7 T still decrease at high pressure but in a less dramatic way than observed at 2 T in the same sealed glass cells. To date, thanks to the linear increase in gas density, they correspond to the highest nuclear magnetizations achieved by MEOP in pure 3He gas. The improved efficiency puts less demanding requirements for compression stages in polarized gas production systems and makes high-field MEOP particularly attractive for magnetic resonance imaging of the lungs, for instance.
Starting Page	1
Ending Page	29
Page Count	29
File Format	PDF
ISSN	14346060
Journal	The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
Volume Number	67
Issue Number	9
e-ISSN	14346079
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-09-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Atomic Physics Atomic, Molecular, Optical and Plasma Physics Physical Chemistry Quantum Physics Quantum Information Technology, Spintronics Spectroscopy/Spectrometry Nonlinear Dynamics
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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Metastability exchange optical pumping of 3He gas up to hundreds of millibars at 4.7 Tesla

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Metastability exchange optical pumping of 3He gas up to hundreds of millibars at 4.7 Tesla