Muon Followers in the Sudbury Neutrino Observatory
نویسنده
چکیده
The Sudbury Neutrino Observatory (SNO) is a Cerenkov detector composed of a spherical acrylic vessel filled with 1,000 metric tonness of ultra pure heavy water. It measures 12 m in diameter and is located about 2 km deep within a Canadian nickel mine. Even at this depth, cosmic rays penetrate the detector at a rate of roughly three per hour. Muons passing through the detector will interact with the heavy water and release spallation neutrons, also called muon followers. They can be measured in the detector via their capture on deuterium (for SNO’s Pure D2O phase) or chlorine (for SNO’s Salt phase). Our analysis focused on the differences between spallation neutrons and neutrons that are born thermal in both the Pure D2O and Salt phases. This paper will provide an overview of the capture efficiency for both low energy neutrons and high energy neutrons as a function of radius. From this efficiency study, the rate of neutrons released as each muon passes through can be measured. Understanding and measuring the neutrons produced by muons will help in the optimization of future sensitive underground experiments.
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تاریخ انتشار 2004