Measurement of the beta-nu correlation using magneto-optically trapped 21Na |
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| Authors: | Scielzo N D Freedman S J Fujikawa B K Vetter P A |
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| Institution: | Department of Physics, University of California at Berkeley and Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. |
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| Abstract: | The beta-neutrino correlation coefficient, a(betanu), in 21Na is inferred from detecting the beta(+) and low-energy recoil daughter nucleus. 21Na is produced at the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory and 800 000 atoms are maintained in a magneto-optical trap. From the measured time of flight of recoil ions in the presence of a drift electric field, we find a(betanu)=0.5243+/-0.0091. There may be a dependence on the trapped atom population. This and other systematic uncertainties are discussed. |
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