Measurement of neutron-proton capture in the SNO+ water phase
PhysRevC (2020)
Abstract:
The SNO+ experiment collected data as a low-threshold water Cherenkov detector from September 2017 to July 2019. Measurements of the 2.2-MeV $\gamma$ produced by neutron capture on hydrogen have been made using an Am-Be calibration source, for which a large fraction of emitted neutrons are produced simultaneously with a 4.4-MeV $\gamma$. Analysis of the delayed coincidence between the 4.4-MeV $\gamma$ and the 2.2-MeV capture $\gamma$ revealed a neutron detection efficiency that is centered around 50% and varies at the level of 1% across the inner region of the detector, which to our knowledge is the highest efficiency achieved among pure water Cherenkov detectors. In addition, the neutron capture time constant was measured and converted to a thermal neutron-proton capture cross section of $336.3^{+1.2}_{-1.5}$ mb.Measurement of neutron-proton capture in the SNO+ water phase
Physical Review C: Nuclear Physics American Physical Society (2020)
Abstract:
The SNO+ experiment collected data as a low-threshold water Cherenkov detector from September 2017 to July 2019. Measurements of the 2.2-MeV $\gamma$ produced by neutron capture on hydrogen have been made using an Am-Be calibration source, for which a large fraction of emitted neutrons are produced simultaneously with a 4.4-MeV $\gamma$. Analysis of the delayed coincidence between the 4.4-MeV $\gamma$ and the 2.2-MeV capture $\gamma$ revealed a neutron detection efficiency that is centered around 50% and varies at the level of 1% across the inner region of the detector, which to our knowledge is the highest efficiency achieved among pure water Cherenkov detectors. In addition, the neutron capture time constant was measured and converted to a thermal neutron-proton capture cross section of $336.3^{+1.2}_{-1.5}$ mb.Measurement of neutron-proton capture in the SNO+ water phase
(2020)
The “stabilization of the final focus of the ILC” project
Proceedings of NANOBEAM 2005, 36th ICFA Advanced Beam Dynamics Workshop (2020) 66-71
Abstract:
We describe techniques to measure and stabilize the relative motion of two objects with respect to each. The position measurements are based on interferometry. Several potential applications at the ILC are studied.Search for invisible modes of nucleon decay in water with the SNO+ detector
Physical Review D American Physical Society (APS) 99:3 (2019) 032008