Resonance detectors (RD) are being developed for neutron spectroscopy in the epithermal energy region at spallation neutron sources. Different choices of converter foils and gamma spectrometers are being compared as part of an optimization and selection process within the TECHNI project. This paper reports on the design of a silicon detector system and some preliminary tests on the VESUVIO spectrometer. The detector has a good efficiency in the X-ray energy range, where two intense photon peaks (at 12 and 48 keV) are expected to be emitted following neutron capture in a uranium converter foil. The detector energy resolution has been improved by nitrogen vapor cooling of the silicon chip and by careful design of the preamplifier electronics. Neutron time of flight spectra have been measured on VESUVIO when the converter foil is placed in the neutron beam. In that case, the detector response is dominated by a continuum due to Compton detection of gammas of higher energy. These results provide a basis for a critical assessment of the applicability of silicon detectors for RD measurements of epithermal neutrons.

Tardocchi, M., Arnaboldi, C., Gorini, G., Imberti, S., Pessina, G., Previtali, E., et al. (2004). Assessment of a silicon detector for pulsed neutron scattering experiments. PHYSICA. B, CONDENSED MATTER, 350(1-3), 853-856 [10.1016/j.physb.2004.03.221].

Assessment of a silicon detector for pulsed neutron scattering experiments

IMBERTI, SILVIA;ANDREANI, CARLA;PIETROPAOLO, ANTONINO;SENESI, ROBERTO
2004

Abstract

Resonance detectors (RD) are being developed for neutron spectroscopy in the epithermal energy region at spallation neutron sources. Different choices of converter foils and gamma spectrometers are being compared as part of an optimization and selection process within the TECHNI project. This paper reports on the design of a silicon detector system and some preliminary tests on the VESUVIO spectrometer. The detector has a good efficiency in the X-ray energy range, where two intense photon peaks (at 12 and 48 keV) are expected to be emitted following neutron capture in a uranium converter foil. The detector energy resolution has been improved by nitrogen vapor cooling of the silicon chip and by careful design of the preamplifier electronics. Neutron time of flight spectra have been measured on VESUVIO when the converter foil is placed in the neutron beam. In that case, the detector response is dominated by a continuum due to Compton detection of gammas of higher energy. These results provide a basis for a critical assessment of the applicability of silicon detectors for RD measurements of epithermal neutrons.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
English
Con Impact Factor ISI
Epithermal neutrons; Neutron spectroscopy; Resonance detector; Neutron spectrometers; Neutrons; Conveter foils; Epithermal neutrons; Resonance detectors R; Neutron scattering
Tardocchi, M., Arnaboldi, C., Gorini, G., Imberti, S., Pessina, G., Previtali, E., et al. (2004). Assessment of a silicon detector for pulsed neutron scattering experiments. PHYSICA. B, CONDENSED MATTER, 350(1-3), 853-856 [10.1016/j.physb.2004.03.221].
Tardocchi, M; Arnaboldi, C; Gorini, G; Imberti, S; Pessina, G; Previtali, E; Andreani, C; Pietropaolo, A; Senesi, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/30611
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