Nuclear emulsions are a formidable tool for detecting charged particles with sub-micrometric spatial resolution, a feature which is essential in quantum interferometry experiments with antimatter. In this context, we have tested the sensitivity of such a detector, devoid of the usual protective layer, with very low energy positrons, that is in the range 0.2-17 keV. The results show that emulsions are sensitive to positrons with energy below 1 keV. Their detection efficiency increases as a function of the energy and it tends to saturate over ∼15 keV. This demonstrates the feasibility of using this type of detector in low energy regime and defines the limits of use for future gravitational studies with antimatter.
Sensitivity of emulsion detectors to low energy positrons / Anzi, L.; Ariga, A.; Ereditato, A.; Ferragut, R.; Giammarchi, M.; Maero, G.; Pistillo, C.; Rome, M.; Scampoli, P.; Toso, V.. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 15:3(2020), pp. P03027-P03027. [10.1088/1748-0221/15/03/P03027]
Sensitivity of emulsion detectors to low energy positrons
Scampoli P.;
2020
Abstract
Nuclear emulsions are a formidable tool for detecting charged particles with sub-micrometric spatial resolution, a feature which is essential in quantum interferometry experiments with antimatter. In this context, we have tested the sensitivity of such a detector, devoid of the usual protective layer, with very low energy positrons, that is in the range 0.2-17 keV. The results show that emulsions are sensitive to positrons with energy below 1 keV. Their detection efficiency increases as a function of the energy and it tends to saturate over ∼15 keV. This demonstrates the feasibility of using this type of detector in low energy regime and defines the limits of use for future gravitational studies with antimatter.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
