The Ultra-cold AMO Physics group is a member
of the FrPNC research collaboration, which is proposing a comprehensive
experimental program of parity non-conservation studies in francium at the
TRIUMF nuclear accelerator facility in Vancouver, Canada. The
FrPNC collaboration is proposing the following measurements:
Anapole moment: a precision measurement
either by the method employed by Carl Wieman's group [C. S. Wood et al., Science
275, 1759 (1997)] or the one discussed here.
"Standard" parity non-conservation measurement:
a precision measurement of the weak mixing mixing angle, by measuring the
degree of parity violation in the E1 forbidden 7S1/2
Y 8S1/2 transition. This is the "standard" method
used in the cesium parity violation experiment [C. S. Wood et al., Science
275, 1759 (1997)]. The parity mixing in francium is expected
to be a factor of 18 larger than in cesium.
Francium is the most attractive atom in which to
further improve the precision of atomic parity non-conservation
measurements. Francium presents serious experimental challenges,
but these have been overcome for the most part. The francium
atom remains the atom with largest expected parity non-conservation
signals and the simplest theory with which to interpret the results.
For further information on parity non-conservation experiments in francium,
J. E. Simsarian, S. Aubin, J. S. Grossman, L. A. Orozco, M.
Pearson, G. D. Sprouse, and W. Z. Zhao
Parity Violation in Atoms and Polarized Electron Scattering,
Ed. B. Frois and M.-A. Bouchiat, World Scientific (1999).
G. D. Sprouse, S. Aubin, E. Gomez, J. M. Grossman, L. A. Orozco,
M. R. Pearson, and M. True
Atomic probes of electromagnetic and weak interactions with
trapped radioactive atoms
Eur. Phys. J. A 13 , 239 (2002)
FrPNC collaboration members
Professor G. Gwinner, Spokesperson, University of Manitoba
Professor G. D. Sprouse, SUNY Stony Brook
Dr. J. A. Behr, Research Scientist, TRIUMF
Dr. K. P. Jackson, Research Scientist, TRIUMF
Dr. M. R. Pearson, Research Scientist, TRIUMF
Professor L. A. Orozco, University of Maryland
Professor V. V. Flambaum, University of New South Wales
Professor S. A. M. Aubin, College of William and Mary