The dark-current projection images were collected in the absence of X-rays, used. The intrinsic noise thus appears unaffected by retinal illumination. Purpose: To investigate how an intrinsic speckle-tracking approach to. With the borosilicate detector containers found to be the dominant background source in current detectors, possibilities for further noise reduction by ~2 orders of magnitude based on selected container materials are discussed. There was no consistent change in the organization of the firing in dark and in. Direct measurements in a massively shielded underground facility for dark matter search have confirmed this result. We derived a background signal of ~10 -3 cts/day in a 1 liter detector of 1-3 wt.% C 2ClF 5, corresponding to a detection limit in the order of 10 -8 n cm -2s -1. Various nuclear techniques were employed to characterise the detector materials with respect to source isotopes ( 238U, 232Th and 147Sm) for the normalisation of the simulations and also light elements (B, Li) having high (α, n) neutron production yields. The neutron background was calculated via Monte Carlo simulations using the MCNPX-PoliMi code in order to extract the recoil distributions following neutron interaction with the atoms of the superheated liquid. We report on the intrinsic neutron-induced signal of C 2ClF 5 devices fabricated by our group that originate from neutron- and alpha-emitting impurities in the detector constituents. Superheated droplet detectors are a promising technique to the measurement of low-intensity neutron fields, as detectors can be rendered insensitive to minimum ionizing radiations. * Corresponding author: online: 25 September 2017 Girard 3ġ Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela, PortugalĢ Laboratoire Souterrain à Bas Bruit, University of Nice, University of Avignon, Centre National de la Reserche Scientifique, Aix-Marseille University, Observatoire de la Côte d’Azur, 84400 Rustrel, Franceģ Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal Carvalho 1, Ignácio Lázaro Roche 2 and Thomas A. Morlat 1, Miguel Felizardo 1, Andreas Kling 1, José G.
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