Physics
Scientific paper
Jun 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..570...89v&link_type=abstract
The fourteenth international spin physics symposium, SPIN2000. AIP Conference Proceedings, Volume 570, pp. 89-98 (2001).
Physics
Weak-Interaction And Lepton Aspects, Nuclear Tests Of Fundamental Interactions And Symmetries, Quarks, Gluons, And Qcd In Nuclei And Nuclear Processes, Neutrino Mass And Mixing
Scientific paper
By confining up to 500,000 radioactive 21Na atoms in a magneto-optic trap, we have studied the beta-neutrino correlation. The 21Na is produced on-line at the Lawrence Berkeley National Laboratory 88'' Cyclotron and trapped using common laser cooling techniques. We detect the low-energy recoil 21Ne daughter nucleus in coincidence with the decay positron. Using the recoil's time-of-flight, we determine the initial momentum of the recoil nucleus and infer the β-ν correlation. Our current data set has a statistical uncertainty to determine the correlation parameter a to better than 2%, and we are studying potential systematic errors at the few percent level. Other beta decay correlations can be studied using magneto-optically trapped radioactive atoms. Precise measurements of correlation parameters can provide limits on non-Standard Model scalar and tensor interactions, or anomalous induced form factors. .
Freedman Stuart J.
Fujikawa B. K.
Scielzo Nicholas D.
Vetter P. A.
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