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APS » Journals » Phys. Rev. Lett. » Volume 93 » Issue 10
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Phys. Rev. Lett. 93, 102501 (2004) [4 pages]

Measurement of the β-ν Correlation using Magneto-optically Trapped 21Na

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N. D. Scielzo, S. J. Freedman, B. K. Fujikawa, and P. A. Vetter
Department of Physics, University of California at Berkeley and Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

Received 14 April 2004; published 30 August 2004

The beta-neutrino correlation coefficient, aβν, in 21Na is inferred from detecting the β+ 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 aβν=0.5243±0.0091. There may be a dependence on the trapped atom population. This and other systematic uncertainties are discussed.

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.102501
DOI:
10.1103/PhysRevLett.93.102501
PACS:
23.40.Bw, 23.20.En, 24.80.+y, 27.30.+t
 
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