The Polarizations Produced, and the Rates of Polarization, in the Optical Pumping of 23S13He

1971 ◽  
Vol 49 (5) ◽  
pp. 545-559 ◽  
Author(s):  
R. S. Timsit ◽  
J. M. Daniels
Keyword(s):  
Light Source ◽  
Satisfactory Agreement ◽  
Nuclear Polarization ◽  
Optical Pumping ◽  
Resonance Radiation ◽  
Metastable Atom ◽  
Circularly Polarized ◽  
Atom Density ◽  
Theoretical Predictions ◽  
Gas Pressures

The optical pumping of metastable 3He atoms with circularly polarized resonance radiation from a 4He light source has been carried out at several 3He gas pressures and at different pumping light intensities and metastable atom concentrations. The dependence of both the equilibrium nuclear polarization and the pumping time on both the metastable atom density and the intensity of the pumping radiation is in satisfactory agreement with the theoretical predictions of Daniels and Timsit.

The Expected Performance of an Optical Pumping Light Source, and the Kinetics of Optical Pumping of 23S13He

1971 ◽  
Vol 49 (5) ◽  
pp. 525-538 ◽  
Author(s):  
J. M. Daniels ◽  
R. S. Timsit
Keyword(s):  
Angular Momentum ◽  
Light Source ◽  
Optical Pumping ◽  
Light Flux ◽  
Resonance Radiation ◽  
Transition Rates ◽  
Expected Performance ◽  
Kinetics Of

A practical light source for optical pumping necessarily excites transitions other than those which it is desired should be excited. It is shown that a pumping light source for 23S13He may be characterized by three parameters, which describe the transition rates for Δm = ±1, and 0, transitions under standard conditions. Expressions are derived relating these parameters to the geometry of the light source. The equation which describes the flow of angular momentum into 3He is formulated, using these parameters, the light flux, the lifetime of the metastable atoms, and collisional mixing in the 23P states. This equation is solved to give the polarization which may be attained, and the rate at which the polarization is built up. A modification of this equation is also given, which takes into account moderate trapping of resonance radiation. An expression is also derived which relates the polarization of 3He to the intensity of the scattered pumping light.

Disorientation of Cs(62P1/2) atoms, induced in collisions with noble gases

1976 ◽  
Vol 54 (7) ◽  
pp. 748-752 ◽  
Author(s):  
B. Niewitecka ◽  
L. Krause
Keyword(s):  
Cross Sections ◽  
Noble Gas ◽  
Zero Magnetic Field ◽  
Zero Field ◽  
Buffer Gas ◽  
Resonance Fluorescence ◽  
Circularly Polarized ◽  
Low Field ◽  
Good Agreement ◽  
Gas Pressures

The disorientation of 62P1/2 cesium atoms, induced in collisions with noble gas atoms in their ground states, was systematically investigated by monitoring the depolarization of cesium resonance fluorescence in relation to noble gas pressures. The Cs atoms, contained together with a buffer gas in a fluorescence cell and located in zero magnetic field, were excited and oriented by irradiation with circularly polarized 8943 Å resonance radiation, and the resonance fluorescence, emitted in an approximately backward direction, was analyzed with respect to circular polarization. The experiments yielded the following disorientation cross sections which have been corrected for the effects of nuclear spin: Cs–He: 4.9 ± 0.7 Å2; Cs–Ne: 2.1 ± 0.3 Å2; Cs–Ar: 5.6 ± 0.8 Å2; Cs–Kr: 5.8 ± 0.9 Å2; Cs–Xe: 6.3 ± 0.9 Å2. The results are in good agreement with most of the available zero-field and low-field data.

A laser light source for circularly polarized VUV radiation

1998 ◽  
Vol 9 (3) ◽  
pp. 422-427 ◽  
Author(s):  
R Irrgang ◽  
M Drescher ◽  
F Gierschner ◽  
M Spieweck ◽  
U Heinzmann
Keyword(s):  
Light Source ◽  
Laser Light ◽  
Circularly Polarized ◽  
Laser Light Source

scholarly journals Rare Gas Metastable Atom Density in Diluted O2 RF Plasmas

2006 ◽  
Vol 126 (1) ◽  
pp. 37-42
Author(s):  
Takeshi Kitajima ◽  
Kei Takahashi ◽  
Toshiki Nakano ◽  
Toshiaki Makabe
Keyword(s):  
Metastable Atom ◽  
Rare Gas ◽  
Rf Plasmas ◽  
Atom Density

scholarly journals High-efficiency optical pumping of nuclear polarization in a GaAs quantum well

2017 ◽  
Vol 96 (20) ◽  
Author(s):  
R. W. Mocek ◽  
V. L. Korenev ◽  
M. Bayer ◽  
M. Kotur ◽  
R. I. Dzhioev ◽  
...  
Keyword(s):  
Quantum Well ◽  
Nuclear Polarization ◽  
Optical Pumping ◽  
High Efficiency
Sign in / Sign up

Export Citation Format

Share Document