Recent studies indicate the resonance detector (RD) technique as an interesting approach for neutron spectroscopy in the electron volt energy region. This work summarizes the results of a series of experiments where RD consisting of YAlO3 (YAP) scintillators were used to detect scattered neutrons with energy in the range 1-200 eV. The response of YAP scintillators to radiative capture gamma emission from a U-238 analyzer foil was characterized in a series of experiments performed on the VESUVIO spectrometer at the ISIS pulsed neutron source. In these experiments a biparametric data acquisition allowed the simultaneous measurements of both neutron time-of-flight and gamma pulse height (energy) spectra. The analysis of the gamma pulse height and neutron time of flight spectra permitted to identify and distinguish the signal and background components. These measurements showed that a significant improvement in the signal-to-background ratio can be achieved by setting a lower level discrimination on the pulse height at about 600 keV equivalent photon energy. Present results strongly indicate YAP scintillators as the ideal candidate for neutron scattering studies with epithermal neutrons at both very low (<5degrees) and intermediate scattering angles. (C) 2004 American Institute of Physics.

Tardocchi, M., Gorini, G., Pietropaolo, A., Andreani, C., Senesi, R., Rhodes, N., et al. (2004). YAP scintillators for resonant detection of epithermal neutrons at pulsed neutron sources. REVIEW OF SCIENTIFIC INSTRUMENTS, 75(11), 4880 [10.1063/1.1795091].

YAP scintillators for resonant detection of epithermal neutrons at pulsed neutron sources

PIETROPAOLO, ANTONINO;ANDREANI, CARLA;SENESI, ROBERTO;
2004-01-01

Abstract

Recent studies indicate the resonance detector (RD) technique as an interesting approach for neutron spectroscopy in the electron volt energy region. This work summarizes the results of a series of experiments where RD consisting of YAlO3 (YAP) scintillators were used to detect scattered neutrons with energy in the range 1-200 eV. The response of YAP scintillators to radiative capture gamma emission from a U-238 analyzer foil was characterized in a series of experiments performed on the VESUVIO spectrometer at the ISIS pulsed neutron source. In these experiments a biparametric data acquisition allowed the simultaneous measurements of both neutron time-of-flight and gamma pulse height (energy) spectra. The analysis of the gamma pulse height and neutron time of flight spectra permitted to identify and distinguish the signal and background components. These measurements showed that a significant improvement in the signal-to-background ratio can be achieved by setting a lower level discrimination on the pulse height at about 600 keV equivalent photon energy. Present results strongly indicate YAP scintillators as the ideal candidate for neutron scattering studies with epithermal neutrons at both very low (<5degrees) and intermediate scattering angles. (C) 2004 American Institute of Physics.
2004
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/07 - FISICA APPLICATA (A BENI CULTURALI, AMBIENTALI, BIOLOGIA E MEDICINA)
English
Con Impact Factor ISI
MOSSBAUER-SPECTROSCOPY; SPECTROMETER; SCATTERING; VESUVIO; REGION
Tardocchi, M., Gorini, G., Pietropaolo, A., Andreani, C., Senesi, R., Rhodes, N., et al. (2004). YAP scintillators for resonant detection of epithermal neutrons at pulsed neutron sources. REVIEW OF SCIENTIFIC INSTRUMENTS, 75(11), 4880 [10.1063/1.1795091].
Tardocchi, M; Gorini, G; Pietropaolo, A; Andreani, C; Senesi, R; Rhodes, N; Schooneveld, E
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/33140
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