Pulse shape discrimination with a large NaI crystal

Döll, P.; Fink, G.; Haupenthal, M.; Finlay, R.W.; Hauber, S.; Klages, H. O.; Schieler, H.; Smend, F.; Wicke, G. D.

doi:10.1016/0168-9002(89)90218-0

Cited by 22 publications

(3 citation statements)

References 12 publications

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“…Other possible phosphorescence components could be present at much longer timescales 8 , but data are scarce. Differences in the scintillation time constants for different particles are also well known and have been used for discrimination purposes: alpha vs. gamma interactions at high energy [9][10][11][12] and nuclear recoils vs electron recoils at very low energies [13][14][15][16][17] . In the latter case, differences are quantified with an effective mean decay time, and are so small that only a statistical discrimination of events can be pursued.…”

Section: Introductionmentioning

confidence: 99%

Slow scintillation time constants in NaI(Tl) for different interacting particles

et al. 2013

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Section: Introductionmentioning

confidence: 99%

Slow scintillation time constants in NaI(Tl) for different interacting particles

et al. 2013

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“…Other studies explored the usage of neutron-induced nuclear reactions, knocking off protons, deuterons, or alpha particles of sodium or iodine nuclei, for fast-neutron detection [18]. Signals produced by the charged reaction products can be distinguished from gamma-ray interactions by means of pulse-shape discrimination (PSD), but the corresponding neutron detection efficiency is quite small and limited to high neutron energies.…”

Section: Physical Background and Previous Workmentioning

confidence: 99%

Thermal Neutron Detection in Mixed Neutron-Gamma Fields With Common NaI(Tl) Detectors

Pausch

Kreuels

Scherwinski

et al. 2022

IEEE Trans. Nucl. Sci.

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Radionuclide Identification Devices (RIDs) or Backpack Radiation Detection Systems (BRDs) are often equipped with NaI(Tl) detectors. We demonstrate that such instruments could be provided with reasonable thermal-and fast-neutron sensitivity by means of an improved and sophisticated processing of the digitized detector signals: Fast neutrons produce nuclear recoils in the scintillation crystal. Corresponding signals are detectible and can be distinguished from that of electronic interactions by pulse-shape discrimination (PSD) techniques as used in experiments searching for weakly interacting massive particles (WIMPs). Thermal neutrons are often captured in iodine nuclei of the scintillator. The gammaray cascades following such captures comprise a sum energy of almost 7 MeV, and some of them involve isomeric states leading to delayed gamma emissions. Both features can be used to distinguish corresponding detector signals from responses to ambient gamma radiation. The experimental proof was adduced by offline analyses of pulse records taken with a commercial RID. An implementation of such techniques in commercial RIDs is feasible.

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“…Other studies explored the usage of neutron-induced nuclear reactions, knocking off protons, deuterons, or alpha particles of sodium or iodine nuclei, for fast-neutron detection [17]. Signals produced by the charged reaction products can be distinguished from gamma-ray interactions by means of pulse-shape discrimination (PSD), but the corresponding neutron detection efficiency is quite small and limited to high neutron energies.…”

Section: Physical Background and Previous Workmentioning

confidence: 99%

Fast- and thermal-neutron detection with common NaI(Tl) detectors

Pausch

Kreuels

Scherwinski

et al. 2022

Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIV

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Radionuclide Identification Devices (RIDs) or Backpack Radiation Detection Systems (BRDs) are often equipped with NaI(Tl) detectors. We demonstrate that such instruments could be provided with reasonable thermal- and fast-neutron sensitivity by means of an improved and sophisticated processing of the digitized detector signals: Fast neutrons produce nuclear recoils in the scintillation crystal. Corresponding signals are detectible and can be distinguished from that of electronic interactions by pulse-shape discrimination (PSD) techniques as used in experiments searching for weakly interacting massive particles (WIMPs). Thermal neutrons are often captured in iodine nuclei of the scintillator. The gamma-ray cascades following such captures comprise a sum energy of almost 7 MeV, and some of them involve isomeric states leading to delayed gamma emissions. Both features can be used to distinguish corresponding detector signals from responses to ambient gamma radiation. The experimental proof was adduced by offline analyses of pulse records taken with a commercial RID. An implementation of such techniques in commercial RIDs is feasible.

show abstract

Pulse shape discrimination with a large NaI crystal

Cited by 22 publications

References 12 publications

Slow scintillation time constants in NaI(Tl) for different interacting particles

Slow scintillation time constants in NaI(Tl) for different interacting particles

Thermal Neutron Detection in Mixed Neutron-Gamma Fields With Common NaI(Tl) Detectors

Fast- and thermal-neutron detection with common NaI(Tl) detectors

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