Detection of quadrupole relaxation in an optically pumped cesium vapour

1985 ◽  
Vol 6 (4) ◽  
pp. 367-379 ◽  
Author(s):  
E. Bernabeu ◽  
J. Tornos
Keyword(s):  
Optically Pumped ◽  
Quadrupole Relaxation

Hyperfine Relaxation of an Optically Pumped Cesium Vapor

1986 ◽  
Vol 40 (5) ◽  
pp. 596-599 ◽  
Author(s):  
J. Tornos ◽  
J. C. Amare
Keyword(s):  
Diffusion Coefficient ◽  
Relaxation Rate ◽  
Cross Section ◽  
Optical Pumping ◽  
Spin Exchange ◽  
Argon Pressure ◽  
Detection Technique ◽  
Cesium Vapor ◽  
Optically Pumped ◽  
Quadrupole Relaxation

The relaxation of hyperfine orientation indirectly induced by optical pumping with σ-polarized D1-light in a cesium vapor in the presence of Ar is experimentally studied. The detection technique ensures the absence of quadrupole relaxation contributions in the relaxation signals. The results from the dependences of the hyperfine relaxation rate on the temperature and argon pressure are: diffusion coefficient of C s in Ar, D0 = 0.101 ± 0.010 cm2 s−1 at 0°C and 760 Torr; relaxation cross section by Cs-Ar collisions, σc = (104 ± 5) × 10−23 cm2; relaxation cross section by Cs-Cs (spin exchange) collisions, σex = (1.63 ± 0.13) × 10−14 cm2.

RF energy coupling to high-pressure optically pumped nonequilibrium plasmas

2001 ◽  
Author(s):  
Peter Palm ◽  
Elke Plonjes ◽  
Wonchul Lee ◽  
Kraig Frederickson ◽  
Walter Lempert ◽  
...  
Keyword(s):  
High Pressure ◽  
Energy Coupling ◽  
Optically Pumped ◽  
Nonequilibrium Plasmas ◽  
Rf Energy

Cost Effective, Scalable Optically Pumped Molecular Laser

2001 ◽  
Author(s):  
Jeff Nicholson ◽  
David Neumann ◽  
Wolfgang Rudolph
Keyword(s):  
Cost Effective ◽  
Optically Pumped ◽  
Molecular Laser ◽  
Optically Pumped Molecular Laser

Spikes in raman spectrum of miniature optically pumped NH3 fir laser

1996 ◽  
Vol 17 (6) ◽  
pp. 1055-1062 ◽  
Author(s):  
Jiayin Qin ◽  
Xingshi Zheng ◽  
Xizhang Luo ◽  
Cong Li ◽  
Yikun Lin
Keyword(s):  
Raman Spectrum ◽  
Fir Laser ◽  
Optically Pumped

scholarly journals Action potentials induce biomagnetic fields in carnivorous Venus flytrap plants

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Anne Fabricant ◽  
Geoffrey Z. Iwata ◽  
Sönke Scherzer ◽  
Lykourgos Bougas ◽  
Katharina Rolfs ◽  
...  
Keyword(s):  
Electrical Activity ◽  
Action Potentials ◽  
Plant Stress ◽  
Optically Pumped ◽  
Long Distance ◽  
Noninvasive Diagnostics ◽  
Venus Flytrap ◽  
Dionaea Muscipula ◽  
Cell Arrays ◽  
Electrical Signaling

AbstractUpon stimulation, plants elicit electrical signals that can travel within a cellular network analogous to the animal nervous system. It is well-known that in the human brain, voltage changes in certain regions result from concerted electrical activity which, in the form of action potentials (APs), travels within nerve-cell arrays. Electro- and magnetophysiological techniques like electroencephalography, magnetoencephalography, and magnetic resonance imaging are used to record this activity and to diagnose disorders. Here we demonstrate that APs in a multicellular plant system produce measurable magnetic fields. Using atomic optically pumped magnetometers, biomagnetism associated with electrical activity in the carnivorous Venus flytrap, Dionaea muscipula, was recorded. Action potentials were induced by heat stimulation and detected both electrically and magnetically. Furthermore, the thermal properties of ion channels underlying the AP were studied. Beyond proof of principle, our findings pave the way to understanding the molecular basis of biomagnetism in living plants. In the future, magnetometry may be used to study long-distance electrical signaling in a variety of plant species, and to develop noninvasive diagnostics of plant stress and disease.

Pulsed optically pumped rubidium clock with ultrahigh resonance contrast

2014 ◽  
Author(s):  
Deng Jianliao ◽  
Lin Jinda ◽  
Qian Jun ◽  
Dong Gongxun ◽  
He Huijuan ◽  
...  
Keyword(s):  
Optically Pumped ◽  
Rubidium Clock ◽  
Resonance Contrast
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