Nuclear polarization of /sup 3/He gas at and below 4. 2 K by room temperature laser optical pumping

Journal Article · Fri May 25 04:00:00 EDT 1984 · AIP Conf. Proc.; (United States)

DOI:https://doi.org/10.1063/1.34605· OSTI ID:5611687

Crampton, S B; Nacher, P J; Leduc, M; Laloe, F

Ground state nuclear polarizations up to 50% have been produced in /sup 3/He gas at liquid helium temperatures and number densities of order 10/sup 18/ cm/sup -3/ by a polarization transfer technique. /sup 3/He gas in a room temperature pyrex cell is optically pumped by light from a color center laser. Polarized ground state atoms diffuse to a second cell immersed in a liquid helium bath. That part of the double cell interior surface near liquid helium temperatures is coated with frozen molecular hydrogen. Under good conditions over 90% of the polarization in the pumping cell is transferred to the cold cell.

• Research Organization: Laboratoire de Spectroscopie Hertzienne de l'E.N.S., 24, rue Lhomond, 75231 Paris Cedex 05, France
• OSTI ID: 5611687
• Report Number(s): CONF-830591-
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 117:1; ISSN APCPC
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
EVEN-ODD NUCLEI
HELIUM 3
HELIUM ISOTOPES
ISOTOPES
LASERS
LIGHT NUCLEI
NUCLEI
OPTICAL PUMPING
POLARIZATION
PUMPING
SOLID STATE LASERS
STABLE ISOTOPES
ULTRALOW TEMPERATURE