DocumentCode :
2815721
Title :
Nonlinear Pressure Shifts of 87Rb and 133Cs in Ar and Kr
Author :
Gong, F. ; Jau, Y.-Y. ; Happer, W.
Author_Institution :
Dept. of Phys., Princeton Univ., Princeton, NJ
fYear :
2008
fDate :
19-21 May 2008
Firstpage :
115
Lastpage :
117
Abstract :
We demonstrated the nonlinear dependence of the microwave resonance frequencies of ground-state Rb or Cs atoms on the pressure of the buffer gases Ar and Kr. No nonlinearities were observed in the gases He or N2. These observations strongly suggest that the nonlinearities are due to the van der Waals molecules that form in Ar and Kr, but not in He or N2. We developed a simple model, parameterized by the effective three-body formation rate of molecules and by the effective product of the collisionally-limited lifetime times the shift of the hyperfine coupling coefficient in the molecule, and it explained the data very well.
Keywords :
argon; caesium; krypton; molecular biophysics; rubidium; collisionally-limited lifetime times; hyperfine coupling coefficient; microwave resonance frequencies; nonlinear pressure shifts; three-body formation rate; Argon; Gases; Helium; Laser beams; Laser stability; Masers; Microwave ovens; Resonance; Resonant frequency; Signal generators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Frequency Control Symposium, 2008 IEEE International
Conference_Location :
Honolulu, HI
ISSN :
1075-6787
Print_ISBN :
978-1-4244-1794-0
Electronic_ISBN :
1075-6787
Type :
conf
DOI :
10.1109/FREQ.2008.4622969
Filename :
4622969
Link To Document :
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