Construction and performance of a large area liquid scintillator cosmic ray anticoincidence detector

Napolitano, J.; Freedman, S. J.; Garvey, G. T.; Green, Michael C.; Lesko, K. T.; Nelson, James E.; Worthington, J.N.; Coover, K.; Dawson, J. W.; Haberichter, W.; Petereit, E.

doi:10.1016/0168-9002(89)90373-2

Cited by 28 publications

(9 citation statements)

References 6 publications

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“…Additional counters were placed below the veto shield after the 1993 run to reduce cosmic ray background entering through the bottom support structure. The main veto shield [15] consists of a 15-cm layer of liquid scintillator in an external tank and 15 cm of lead shot in an internal tank. This combination of active and passive shielding tags cosmic ray muons that stop in the lead shot.…”

Section: Veto Shieldmentioning

confidence: 99%

Evidence for neutrino oscillations from muon decay at rest

Athanassopoulos¹,

Auerbach²,

Burman³

et al. 1996

Phys. Rev. C

267

166

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A search forν µ →ν e oscillations has been conducted at the Los Alamos 1 Meson Physics Facility usingν µ from µ + decay at rest. Theν e are detected via the reactionν e p → e + n, correlated with the 2.2 MeV γ from np → dγ. The use of tight cuts to identify e + events with correlated γ rays yields 22 events with e + energy between 36 and 60 MeV and only 4.6 ± 0.6 background events.The probability that this excess is due entirely to a statistical fluctuation is 4.1 × 10 −8 . A χ 2 fit to the entire e + sample results in a total excess of 51.8 +18.7 −16.9 ± 8.0 events with e + energy between 20 and 60 MeV. If attributed tō ν µ →ν e oscillations, this corresponds to an oscillation probability (averaged over the experimental energy and spatial acceptance) of (0.31 +0.11 −0.10 ± 0.05)%. 14.60. Pq, 13.15.+g Typeset using REVT E X

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Section: Veto Shieldmentioning

confidence: 99%

Evidence for neutrino oscillations from muon decay at rest

Athanassopoulos¹,

Auerbach²,

Burman³

et al. 1996

Phys. Rev. C

267

166

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show abstract

“…More bottom counters were added after the 1995 run. The main veto shield [21] consists of a 15-cm layer of liquid scintillator in an external tank and 15 cm of lead shot in an internal tank. This combination of active and passive shielding tags cosmic ray muons that stop in the lead shot.…”

Section: The Lsnd Detectormentioning

confidence: 99%

Measurement of electron-neutrino electron elastic scattering

et al. 2001

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The cross section for the elastic scattering reaction νe + e − → νe + e − was measured by the Liquid Scintillator Neutrino Detector using a µ + decay-at-rest νe beam at the Los Alamos Neutron Science Center. The standard model of electroweak physics predicts a large destructive interference between the charge current and neutral current channels for this reaction. The measured cross section, σ νee − = [10.1 ± 1.1(stat.) ± 1.0(syst.)] × Eν e (MeV) ×10 −45 cm 2 , agrees well with standard model expectations. The measured value of the interference parameter, I = −1.01 ± 0.13(stat.) ± 0.12(syst.), is in good agreement with the standard model expectation of I SM = −1.09. Limits are placed on neutrino flavorchanging neutral currents. An upper limit on the muon-neutrino magnetic moment of 6.8 × 10 −10 µ Bohr is obtained using the νµ andνµ fluxes from π + and µ + decay.

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“…The shield had been built for a previous experiment [14] and had liquid scintillator as an outer layer with 12.5 cm of lead shielding inside the scintillator tank. A section of the veto shield is shown in Fig.…”

Section: The Veto Shieldmentioning

confidence: 99%

“…Hysol PC18 had high dielectric strength, cured at room temperature, and was extremely abrasion and solvent resistant. A description of the veto PMTs can be found elsewhere [14]. The PMTs were powered through high-voltage cards that distributed to each PMT the correct high voltage that was determined in the testing process.…”

Section: Fig 12 Distribution Of Peak To Valley Parameter For Detectmentioning

confidence: 99%