The calibration of the Sudbury Neutrino Observatory using uniformly distributed radioactive sources
K. Boudjemline, B. Cai, B.T. Cleveland, H.C. Evans, G.T. Ewan, J., Farine, R.J. Ford, E. Guillian, A.L. Hallin, E.D. Hallman, C. Howard, P., Jagam, N.A. Jelley, K.J. Keeter, J.R. Klein, C. Kraus, C.B. Krauss, R. Lange,, I.T. Lawson, J.R. Leslie, J.C. Loach, A.B. McDonald
TL;DR
This paper details the creation and use of distributed radioactive sources for precise calibration of the Sudbury Neutrino Observatory's neutron detection and background characterization, enhancing measurement accuracy.
Contribution
It introduces a novel calibration method using uniformly distributed 24Na and 222Rn sources for the SNO detector, improving response accuracy to neutrons and low-energy particles.
Findings
Accurate calibration of neutron response in SNO.
Enhanced understanding of background Cherenkov light.
Improved neutron detection efficiency measurement.
Abstract
The production and analysis of distributed sources of 24Na and 222Rn in the Sudbury Neutrino Observatory (SNO) are described. These unique sources provided accurate calibrations of the response to neutrons, produced through photodisintegration of the deuterons in the heavy water target, and to low energy betas and gammas. The application of these sources in determining the neutron detection efficiency and response of the 3He proportional counter array, and the characteristics of background Cherenkov light from trace amounts of natural radioactivity is described.
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