Optical pumping technique for measuring small nuclear quadrupole shifts in 1S(0) atoms and testing spatial isotropy

Details Optical pumping technique for measuring small nuclear quadrupole shifts in 1S(0) atoms and testing spatial isotropy Optical pumping technique for measuring small nuclear quadrupole shifts in 1S(0) atoms and testing spatial isotropy

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrva..39.1082l&link_type=abstract

Physical Review A - General Physics, 3rd Series (ISSN 0556-2791), vol. 39, Feb. 1, 1989, p. 1082-1111.

Physics

Nuclear Physics

38

Frequency Shift, Mercury (Metal), Metal Vapors, Nuclear Magnetic Resonance, Nuclear Quadrupole Resonance, Optical Pumping, Magnetic Fields, Nuclei (Nuclear Physics), Photomultiplier Tubes, Polarized Light, Precession, Zeeman Effect, Level Crossing And Optical Pumping

Scientific paper

Using Hg-201 atoms (I = 3/2), a new technique is demonstrated for studying the static quadrupole interactions of nuclei in 1S(0) atoms when the splitting is far too small to be resolved. The nuclear-spin precession frequency is made sensitive to quadrupole energy shifts by inducing, through optical pumping, both dipole and quadrupole spin polarization in a vapor of Hg-201 atoms. The sensitivity predicted from measurements of the polarization agrees with the calibrated value found by inducing a known quadrupole light shift. By rotating the mercury-vapor cell, quadrupole interactions with the cell walls were observed with the expected cos 2phi azimuthal variation. In an application of this technique, a search for possible dependence of the Hg-201 spin precession frequency on the orientation of the precession axis in space yields the null result of delta-f less than 5 times 10 to the minus 7 Hz, which reduces the previous limits on spatial anisotropy by over three orders of magnitude and places stringent new bounds on violations of Lorentz invariance.

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