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Nuclear Experiment

arXiv:1512.00794 (nucl-ex)
[Submitted on 2 Dec 2015 (v1), last revised 18 Jul 2016 (this version, v2)]

Title:A search for cosmogenic production of $β$-neutron emitting radionuclides in water

Authors:S. Dazeley, M. Askins, M. Bergevin, A. Bernstein, N. S. Bowden, P. Jaffke, S. D. Rountree, T. M. Shokair, M. Sweany
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Abstract:Here we present the first results of WATCHBOY, a water Cherenkov detector designed to measure the yield of $\beta$-neutron emitting radionuclides produced by cosmic ray muons in water. In addition to the $\beta$-neutron measurement, we also provide a first look at isolating single-$\beta$ producing radionuclides following muon-induced hadronic showers as a check of the detection capabilities of WATCHBOY. The data taken over $207$ live days indicates a $^{9}$Li production yield upper limit of $1.9\times10^{-7}\mu^{-1}g^{-1}\mathrm{cm}^2$ at $\sim400$ meters water equivalent (m.w.e.) overburden at the $90\%$ confidence level. In this work the $^{9}$Li signal in WATCHBOY was used as a proxy for the combined search for $^{9}$Li and $^{8}$He production. This result will provide a constraint on estimates of antineutrino-like backgrounds in future water-based antineutrino detectors.
Comments: 11 pages, 12 figures
Subjects: Nuclear Experiment (nucl-ex); High Energy Physics - Experiment (hep-ex); Instrumentation and Detectors (physics.ins-det)
Report number: LLNL-JRNL-677613
Cite as: arXiv:1512.00794 [nucl-ex]
  (or arXiv:1512.00794v2 [nucl-ex] for this version)
  https://doi.org/10.48550/arXiv.1512.00794
Related DOI: https://doi.org/10.1016/j.nima.2016.03.014

Submission history

From: Steven Dazeley [view email]
[v1] Wed, 2 Dec 2015 18:15:46 UTC (4,319 KB)
[v2] Mon, 18 Jul 2016 21:09:53 UTC (1,624 KB)
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