Physics
Scientific paper
Mar 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phdt........16d&link_type=abstract
Thesis (PhD). OREGON STATE UNIVERSITY, Source DAI-B 60/09, p. 4684, Mar 2000, 177 pages.
Physics
Scientific paper
The long-standing Solar Neutrino Problem describes the disagreement between the observed and predicted solar neutrino flux. An extension to the electroweak model of particle physics predicts that neutrino flavor may change as a neutrino propagates from its source, and may account for the Solar Neutrino Problem. The Sudbury Neutrino Observatory will make two measurements of the 8B neutrino flux from the Sun. The first is independent of neutrino flavor, allowing for the first time a definitive measurement of the total 8B neutrino flux. The second measurement will be sensitive only to the 8B electron-neutrino flux. Comparison of these two measurements will allow a determination of whether the electron-neutrinos produced in the Sun change their flavor as they propagate to the Earth. Precise energy calibration is required to ensure accurate measurements. Two energy calibration sources will be described that rely on the coincident emission of a β particle and a γ-ray. The sources make use of 16IN and 24Na β- decay. In addition to energy calibration, the 24Na source provides an assessment of the rate of photodissociation of deuterium that is important in understanding backgrounds for both solar neutrino measurements.
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