Energy non-linearity effects in the response of ionic crystal scintillators to X-rays with energy in the region of the K-absorptions edges: experimental results

Ferreira, L.; Ferreira, Helena; Veloso, J.F.C.A.; Santos, J.M.F. dos

doi:10.1016/j.nima.2003.08.171

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…In addition, there is a small jump in the region corresponding to the K electron binding energy of yttrium = 17.038 keV: ~1.0 and 2.8%, respec tively. These data are in good agreement with the results obtained using the other methods in [32,33]. The worst energy resolution is exhibited by the YPO:Ce scintillator: 89.1% for an excitation energy of 10.5 keV and 29.0% for 100 keV.…”

Section: Energy Resolutionsupporting

confidence: 89%

Energy dependence of the relative light output of YAlO3:Ce, Y2SiO5:Ce, and YPO4:Ce scintillators

2012

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Abstract-The nonlinear dependence of the relative light output on the energy deposited in single crystal scintillation materials YAlO 3 :Ce (YAP:Ce), Y 2 SiO 5 :Ce (YSO:Ce), and YPO 4 :Ce (YPO:Ce) has been studied. The investigations have been conducted under quasi monochromatic X ray excitation in the energy range of 9.5-100 keV. In addition to the standard technique for measuring the nonproportional scintillator response based on the dependence of the full energy peak position on the energy of incident radiation, a method is proposed for measuring the light output by X ray fluorescence peaks. Using this method for YAP:Ce, it is pos sible to investigate the nonlinear dependence of the light output on the photon energy in the energy range of 2-40 keV. Along with this method, the K dip spectroscopy method has been proposed and tested by measur ing the dependence of the relative light output on the electron energy in the range of 0.1-80.0 keV. The pro cesses resulting in the loss of the scintillation material efficiency at a high ionization density are considered.

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Section: Energy Resolutionsupporting

confidence: 89%

Energy dependence of the relative light output of YAlO3:Ce, Y2SiO5:Ce, and YPO4:Ce scintillators

2012

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“…In particular, in NaI(Tl) scintillators some non-linear effects are expected at the K-shell Iodine binding energy (33.2 keV). This fact has been observed experimentally [62][63][64][65][66], but at a level of only 5 % in the amplitude response. Similarly, at around 5 keV (L-shell Iodine binding energy) the same effect is expected, as it has been observed in Refs.…”

Section: Energy Calibration Of Anais-0 At Very Low Energymentioning

confidence: 52%

Bulk NaI(Tl) scintillation low energy events selection with the ANAIS-0 module

et al. 2014

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Dark matter particles scattering off target nuclei are expected to deposit very small energies in form of nuclear recoils (below 100 keV). Because of the low scintillation efficiency for nuclear recoils as compared to electron recoils, in most of the scintillating targets considered in the search for dark matter, the region below 10 keVee (electron equivalent energy) concentrates most of the expected dark matter signal. For this reason, very low energy threshold (at or below 2 keVee) and very low background are required to be competitive in the search for dark matter with such detection technique. This is the case of Annual modulation with NaI Scintillators (ANAIS), which is an experiment to be carried out at the Canfranc Underground Laboratory. A good knowledge of the detector response function for real scintillation events in the active volume, a good characterization of other anomalous or noise event populations contributing in that energy range, and the development of convenient filtering procedures for the latter are mandatory in order to achieve the required low background at such a low energy. In this work we present the characteristics of different types of events observed in large size NaI(Tl) detectors, and the event-type identification techniques developed. Such techniques allow distinguishing among events associated with bulk NaI scintillation, and events related to muon interactions in the detectors or shielding, photomultiplier origin events, and analysis event fakes. We describe the specific protocols developed to build bulk scintillation events spectra from the raw data and we apply them to data obtained with one of the ANAIS prototypes, ANAIS-0. Nuclear recoil type events were also explored using data from a neutron calibraa e-mail: ccuesta@uw.edu tion; however pulse shape cuts were found not to be effective to discriminate them from electron recoil events. The effect of the filtering procedures developed in this nuclear recoils population has been analyzed in order to properly correct cut efficiencies in dark matter analysis.

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“…From 6 MeV down to 30 keV the relative yield continuously increases by as much as 20%. Between 60 keV and 10 keV the response is relatively constant apart from a dip at the iodine K-shell absorption edge [14]- [16].…”

Section: Light Yield and Non-proportional Responsementioning

confidence: 99%

Gamma ray spectroscopy with a O19/spl times/19 mm/sup 3/ LaBr/sub 3/:0.5% Ce/sup 3+/ scintillator

Dorenbos

Haas

Eijk

2004

IEEE Trans. Nucl. Sci.

108

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Energy non-linearity effects in the response of ionic crystal scintillators to X-rays with energy in the region of the K-absorptions edges: experimental results

Cited by 6 publications

References 18 publications

Energy dependence of the relative light output of YAlO3:Ce, Y2SiO5:Ce, and YPO4:Ce scintillators

Energy dependence of the relative light output of YAlO3:Ce, Y2SiO5:Ce, and YPO4:Ce scintillators

Bulk NaI(Tl) scintillation low energy events selection with the ANAIS-0 module

Gamma ray spectroscopy with a O19/spl times/19 mm/sup 3/ LaBr/sub 3/:0.5% Ce/sup 3+/ scintillator

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